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UNISONIC TECHNOLOGIES CO., LTD LD2985
VERY LOW DROP AND LOW NOISE VOLTAGE REGULATOR LOW ESR CAP. COMPATIBLE, WITH INHIBIT FUNCTION
DESCRIPTION
The UTC LD2985 is a 150mA fixed output voltage regulator. The ultra low drop voltage and the low quiescent current make them particularly suitable for low noise, low power applications, and in battery powered systems. In sleep mode quiescent current is less than 1A when INHIBIT pin is pulled low. Shutdown Logic Control Function is available on pin 3 (TTL compatible). This means that when the device is used as local regulator, it is possible to put a part of the board in standby, decreasing the total power consumption. An external capacitor, CBYP=10nF, connected between bypass pin and GND reduce the noise to 30Vrms. Typical applications are in cellular phone, palmtop laptop computer, personal digital assistant (PDA), personal stereo, camcorder and camera.
LINEAR INTEGRATED CIRCUIT
FEATURES
* Very Low Dropout Voltage (280mV at 150mA and 7mV at 1mA load) * Very Low Quiescent current (2mA Typ. at 150mA load and 80A at no Load) * Output Current up to 150mA * Logic Controlled Electronic Shutdown * Output Voltage of 1.5, 1.8, 2.5, 2.8, 2.85, 3, 3.1, 3.2, 3.3, 3.5, 3.6, 3.8, 4, 4.7, 5V * Internal Current and Thermal Limit * Low Output Noise Voltage 30Vrms
ORDERING INFORMATION
Ordering Number Lead Free Plating Halogen Free LD2985L-XX-AF5-R LD2985G-xx-AF5-R Note: xx: Output Voltage, refer to Marking Information. Package SOT-25 Packing Tape Reel
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MARKING INFORMATION
PART NO. LD2985-1.5V LD2985-1.8V LD2985-2.5V LD2985-2.8V LD2985-2.85V LD2985-3.0V LD2985-3.1V LD2985-3.2V LD2985-3.3V LD2985-3.5V LD2985-3.6V LD2985-3.8V LD2985-4.0V LD2985-4.7V LD2985-5.0V VOLTAGE 1.5V 1.8V 2.5V 2.8V 2.85V 3.0V 3.1V 3.2V 3.3V 3.5V 3.6V 3.8V 4.0V 4.7V 5.0V VOLTAGE CODE A5 A8 B5 B8 BJ C0 C1 C2 C3 C5 C6 C8 D0 D7 E0
LINEAR INTEGRATED CIRCUIT
MARKING
PIN CONFIGURATION
PIN DESCRIPTION
PIN NO. 1 2 3 4 5 PIN NAME DESCRIPTION IN Input port GND Ground pin Control switches ON/OFF. Inhibit is not internally pulled-up; it cannot be left floating. INHIBIT Disable the device when connected to GND or to a positive voltage less than 0.18V Bypass pin: Capacitor to be connected to GND in order to improve the thermal noise Bypass performances. OUT Output port
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BLOCK DIAGRAM
LINEAR INTEGRATED CIRCUIT
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ABSOLUTE MAXIMUM RATINGS
LINEAR INTEGRATED CIRCUIT
PARAMETER SYMBOL RATINGS UNIT DC Input Voltage ViN 16 V INHIBIT Input Voltage VINH 16 V Output Current IOUT Internally limited Power Dissipation PD Internally limited -40 ~ +85 Operating Junction Temperature TOPR C Storage Temperature TSTG -40 ~ +150 C Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied.
THERMAL DATA
PARAMETER Junction to Case SYMBOL JC RATINGS 81 UNIT C/W
ELECTRICAL CHARACTERISTICS
(TJ=25C, VI N=VOUT+1V, IOUT=1mA, VSHDN=2V, CI =1F, CO=1F, unless otherwise specified) FOR VOUT=1.5V PARAMETER SYMBOL TEST CONDITIONS MIN TYP Operating Input Voltage VI(OPR) VIN=2.5V 1.470 1.5 Output Voltage VOUT 1.455 IOUT=1 ~ 150mA Short Circuit Current ISC RL=0 400 Line Regulation VOUT VIN=VOUT+1V ~ 16V, IOUT=1mA IOUT=0 1 TJ=-20 ~ 125C, IOUT =0 IOUT=1mA 7 IOUT=1mA, TJ=-20 ~ 125C IOUT=10mA 40 Dropout Voltage VD IOUT=10mA, TJ=-20 ~ 125C IOUT=50mA 120 IOUT=50mA, TJ=-20 ~ 125C IOUT=150mA 280 IOUT=150mA, TJ=-20 ~ 125C IOUT=0 80 TJ=-20 ~ 125C, IOUT=0 IOUT=1mA 100 IOUT=1mA, TJ=-20 ~ 125C IOUT=10mA 200 IOUT=10mA, TJ=-20 ~ 125C Quiescent Current IQ IOUT=50mA 600 IOUT=50mA, TJ=-20 ~ 125C IOUT=150mA 2000 IOUT=150mA, TJ=-20 ~ 125C OFF MODE VINH<0.18V 0 OFF MODE VINH<0.18V TJ=-20 ~ 125C Supply Voltage Rejection SVR CBYP=0.01F, CO=10F, f=1KHz 45 Control Input Logic Low VIL TJ=-20 ~ 125C Control Input Logic High VIH TJ=-20 ~ 125C 2 TJ=-20 ~ 125C, VSHDN=5V 5 Control Input Current IINH 0 TJ=-20 ~ 125C, VSHDN=0V B=300Hz ~ 50KHz Output Noise Voltage eN 30 CBYP=0.01F, CO=10F
MAX 16 1.530 1.545 30 3 5 10 15 60 90 150 225 350 575 100 150 150 200 300 400 1050 1200 3000 4000 2 0.15 15 -1
UNIT V V V mA mV mV mV mV mV mV mV mV mV mV mV A A A A A A A A A A A A dB V V A A V
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ELECTRICAL CHARACTERISTICS(Cont.)
FOR VOUT=1.8V PARAMETER Operating Input Voltage Output Voltage Short Circuit Current Line Regulation SYMBOL VI(OPR) VOUT ISC VOUT
LINEAR INTEGRATED CIRCUIT
TEST CONDITIONS VIN=2.8V IOUT=1 ~ 150mA RL=0 VIN=VOUT+1V ~ 16V, IOUT=1mA IOUT=0 TJ=-20 ~ 125C, IOUT =0 IOUT=1mA IOUT=1mA, TJ=-20 ~ 125C IOUT=10mA IOUT=10mA, TJ=-20 ~ 125C IOUT=50mA IOUT=50mA, TJ=-20 ~ 125C IOUT=150mA IOUT=150mA, TJ=-20 ~ 125C IOUT=0 TJ=-20 ~ 125C, IOUT=0 IOUT=1mA IOUT=1mA, TJ=-20 ~ 125C IOUT=10mA IOUT=10mA, TJ=-20 ~ 125C IOUT=50mA IOUT=50mA, TJ=-20 ~ 125C IOUT=150mA IOUT=150mA, TJ=-20 ~ 125C OFF MODE VINH<0.18V OFF MODE VINH<0.18V TJ=-20 ~ 125C CBYP=0.01F, Co=10F, f=1KHz TJ=-20 ~ 125C TJ=-20 ~ 125C TJ=-20 ~ 125C, VSHDN=5V TJ=-20 ~ 125C, VSHDN=0V B=300Hz ~ 50KHz CBYP=0.01F, Co=10F
MIN 1.764 1.746
TYP 1.8 400 1 7 40 120 280 80 100 200 600 2000 0
MAX 16 1.836 1.854 30 3 5 10 15 60 90 150 225 350 575 100 150 150 200 300 400 1050 1200 3000 4000 2
Dropout Voltage
VD
Quiescent Current
IQ
UNIT V V V mA mV mV mV mV mV mV mV mV mV mV mV A A A A A A A A A A A A dB V V A A V
Supply Voltage Rejection Control Input Logic Low Control Input Logic High Control Input Current Output Noise Voltage
SVR VIL VIH IiNH eN
45 0.15 2 5 0 30 15 -1
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ELECTRICAL CHARACTERISTICS(Cont.)
FOR VOUT=2.5V PARAMETER Operating Input Voltage Output Voltage Short Circuit Current Line Regulation SYMBOL VI(OPR) VOUT ISC VOUT
LINEAR INTEGRATED CIRCUIT
TEST CONDITIONS VIN=3.5V IOUT=1 ~ 150mA RL=0 VIN=VOUT+1V ~ 16V, IOUT=1mA IOUT=0 TJ=-20 ~ 125C, IOUT =0 IOUT=1mA IOUT=1mA, TJ=-20 ~ 125C IOUT=10mA IOUT=10mA, TJ=-20 ~ 125C IOUT=50mA IOUT=50mA, TJ=-20 ~ 125C IOUT=150mA IOUT=150mA, TJ=-20 ~ 125C IOUT=0 TJ=-20 ~ 125C, IOUT=0 IOUT=1mA IOUT=1mA, TJ=-20 ~ 125C IOUT=10mA IOUT=10mA, TJ=-20 ~ 125C IOUT=50mA IOUT=50mA, TJ=-20 ~ 125C IOUT=150mA IOUT=150mA, TJ=-20 ~ 125C OFF MODE VINH<0.18V OFF MODE VINH<0.18V TJ=-20 ~ 125C CBYP=0.01F, Co=10F, f=1KHz TJ=-20 ~ 125C TJ=-20 ~ 125C TJ=-20 ~ 125C, VSHDN=5V TJ=-20 ~ 125C, VSHDN=0V B=300Hz ~ 50KHz CBYP=0.01F, Co=10F
MIN 2.450 2.425
TYP 2.5 400 1 7 40 120 280 80 100 200 600 2000 0
MAX 16 2.550 2.575 30 3 5 10 15 60 90 150 225 350 575 100 150 150 200 300 400 1050 1200 3000 4000 2
Dropout Voltage
VD
Quiescent Current
IQ
UNIT V V V mA mV mV mV mV mV mV mV mV mV mV mV A A A A A A A A A A A A dB V V A A V
Supply Voltage Rejection Control Input Logic Low Control Input Logic High Control Input Current Output Noise Voltage
SVR VIL VIH IINH eN
45 0.15 2 5 0 30 15 -1
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ELECTRICAL CHARACTERISTICS(Cont.)
FOR VOUT=2.8V PARAMETER Operating Input Voltage Output Voltage Short Circuit Current Line Regulation SYMBOL VI(OPR) VOUT ISC VOUT
LINEAR INTEGRATED CIRCUIT
TEST CONDITIONS VIN=3.8V IOUT=1 ~ 150mA RL=0 VIN=VOUT+1V ~ 16V, IOUT=1mA IOUT=0 TJ=-20 ~ 125C, IOUT =0 IOUT=1mA IOUT=1mA, TJ=-20 ~ 125C IOUT=10mA IOUT=10mA, TJ=-20 ~ 125C IOUT=50mA IOUT=50mA, TJ=-20 ~ 125C IOUT=150mA IOUT=150mA, TJ=-20 ~ 125C IOUT=0 TJ=-20 ~ 125C, IOUT=0 IOUT=1mA IOUT=1mA, TJ=-20 ~ 125C IOUT=10mA IOUT=10mA, TJ=-20 ~ 125C IOUT=50mA IOUT=50mA, TJ=-20 ~ 125C IOUT=150mA IOUT=150mA, TJ=-20 ~ 125C OFF MODE VINH<0.18V OFF MODE VINH<0.18V TJ=-20 ~ 125C CBYP=0.01F, Co=10F, f=1KHz TJ=-20 ~ 125C TJ=-20 ~ 125C TJ=-20 ~ 125C, VSHDN=5V TJ=-20 ~ 125C, VSHDN=0V B=300Hz ~ 50KHz CBYP=0.01F, Co=10F
MIN 2.744 2.716
TYP 2.8 400 1 7 40 120 280 80 100 200 600 2000 0
MAX 16 2.856 2.884 30 3 5 10 15 60 90 150 225 350 575 100 150 150 200 300 400 1050 1200 3000 4000 2
Dropout Voltage
VD
Quiescent Current
IQ
UNIT V V V mA mV mV mV mV mV mV mV mV mV mV mV A A A A A A A A A A A A dB V V A A V
Supply Voltage Rejection Control Input Logic Low Control Input Logic High Control Input Current Output Noise Voltage
SVR VIL VIH IINH eN
45 0.15 2 5 0 30 15 -1
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ELECTRICAL CHARACTERISTICS(Cont.)
FOR VOUT=2.85V PARAMETER Operating Input Voltage Output Voltage Short Circuit Current Line Regulation SYMBOL VI(OPR) VOUT ISC VOUT
LINEAR INTEGRATED CIRCUIT
TEST CONDITIONS VIN=3.85V IOUT=1 ~ 150mA RL=0 VIN=VOUT+1V ~ 16V, IOUT=1mA IOUT=0 TJ=-20 ~ 125C, IOUT =0 IOUT=1mA IOUT=1mA, TJ=-20 ~ 125C IOUT=10mA IOUT=10mA, TJ=-20 ~ 125C IOUT=50mA IOUT=50mA, TJ=-20 ~ 125C IOUT=150mA IOUT=150mA, TJ=-20 ~ 125C IOUT=0 TJ=-20 ~ 125C, IOUT=0 IOUT=1mA IOUT=1mA, TJ=-20 ~ 125C IOUT=10mA IOUT=10mA, TJ=-20 ~ 125C IOUT=50mA IOUT=50mA, TJ=-20 ~ 125C IOUT=150mA IOUT=150mA, TJ=-20 ~ 125C OFF MODE VINH<0.18V OFF MODE VINH<0.18V TJ=-20 ~ 125C CBYP=0.01F, CO=10F, f=1KHz TJ=-20 ~ 125C TJ=-20 ~ 125C TJ=-20 ~ 125C, VSHDN=5V TJ=-20 ~ 125C, VSHDN=0V B=300Hz ~ 50KHz CBYP=0.01F, CO=10F
MIN 2.793 2.764
TYP 2.85 400 1 7 40 120 280 80 100 200 600 2000 0
MAX 16 2.907 2.936 30 3 5 10 15 60 90 150 225 350 575 100 150 150 200 300 400 1050 1200 3000 4000 2
Dropout Voltage
VD
Quiescent Current
IQ
UNIT V V V mA mV mV mV mV mV mV mV mV mV mV mV A A A A A A A A A A A A dB V V A A V
Supply Voltage Rejection Control Input Logic Low Control Input Logic High Control Input Current Output Noise Voltage
SVR VIL VIH IINH eN
45 0.15 2 5 0 30 15 -1
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ELECTRICAL CHARACTERISTICS(Cont.)
FOR VOUT=3.0V PARAMETER Operating Input Voltage Output Voltage Short Circuit Current Line Regulation SYMBOL VI(OPR) VOUT ISC VOUT TEST CONDITIONS
LINEAR INTEGRATED CIRCUIT
MIN 2.940 2.910
TYP 3.0 400 1 7 40 120 280 80 100 200 600 2000 0
Dropout Voltage
VD
Quiescent Current
IQ
Supply Voltage Rejection Control Input Logic Low Control Input Logic High Control Input Current Output Noise Voltage
SVR VIL VIH IINH eN
VIN=4.0V IOUT=1 ~ 150mA RL=0 VIN=VOUT+1V ~ 16V, IOUT=1mA IOUT=0 TJ=-20 ~ 125C, IOUT =0 IOUT=1mA IOUT=1mA, TJ=-20 ~ 125C IOUT=10mA IOUT=10mA, TJ=-20 ~ 125C IOUT=50mA IOUT=50mA, TJ=-20 ~ 125C IOUT=150mA IOUT=150mA, TJ=-20 ~ 125C IOUT=0 TJ=-20 ~ 125C, IOUT=0 IOUT=1mA IOUT=1mA, TJ=-20 ~ 125C IOUT=10mA IOUT=10mA, TJ=-20 ~ 125C IOUT=50mA IOUT=50mA, TJ=-20 ~ 125C IOUT=150mA IOUT=150mA, TJ=-20 ~ 125C OFF MODE VINH<0.18V OFF MODE VINH<0.18V TJ=-20 ~ 125C CBYP=0.01F, CO=10F, f=1KHz TJ=-20 ~ 125C TJ=-20 ~ 125C TJ=-20 ~ 125C, VSHDN=5V TJ=-20 ~ 125C, VSHDN=0V B=300Hz ~ 50KHz CBYP=0.01F, CO=10F
MAX 16 3.060 3.090 30 3 5 10 15 60 90 150 225 350 575 100 150 150 200 300 400 1050 1200 3000 4000 2
UNIT V V V mA mV mV mV mV mV mV mV mV mV mV mV A A A A A A A A A A A A dB V V A A V
45 0.15 2 5 0 30 15 -1
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ELECTRICAL CHARACTERISTICS(Cont.)
FOR VOUT=3.1V PARAMETER Operating Input Voltage Output Voltage Short Circuit Current Line Regulation SYMBOL VI(OPR) VOUT ISC VOUT
LINEAR INTEGRATED CIRCUIT
TEST CONDITIONS VIN=4.1V IOUT=1 ~ 150mA RL=0 VIN=VOUT+1V ~ 16V, IOUT=1mA IOUT=0 TJ=-20 ~ 125C, IOUT =0 IOUT=1mA IOUT=1mA, TJ=-20 ~ 125C IOUT=10mA IOUT=10mA, TJ=-20 ~ 125C IOUT=50mA IOUT=50mA, TJ=-20 ~ 125C IOUT=150mA IOUT=150mA, TJ=-20 ~ 125C IOUT=0 TJ=-20 ~ 125C, IOUT=0 IOUT=1mA IOUT=1mA, TJ=-20 ~ 125C IOUT=10mA IOUT=10mA, TJ=-20 ~ 125C IOUT=50mA IOUT=50mA, TJ=-20 ~ 125C IOUT=150mA IOUT=150mA, TJ=-20 ~ 125C OFF MODE VINH<0.18V OFF MODE VINH<0.18V TJ=-20 ~ 125C CBYP=0.01F, CO=10F, f=1KHz TJ=-20 ~ 125C TJ=-20 ~ 125C TJ=-20 ~ 125C, VSHDN=5V TJ=-20 ~ 125C, VSHDN=0V B=300Hz ~ 50KHz CBYP=0.01F, CO=10F
MIN 3.038 3.007
TYP 3.1 400 1 7 40 120 280 80 100 200 600 2000 0
MAX 16 3.162 3.193 30 3 5 10 15 60 90 150 225 350 575 100 150 150 200 300 400 1050 1200 3000 4000 2
Dropout Voltage
VD
Quiescent Current
IQ
UNIT V V V mA mV mV mV mV mV mV mV mV mV mV mV A A A A A A A A A A A A dB V V A A V
Supply Voltage Rejection Control Input Logic Low Control Input Logic High Control Input Current Output Noise Voltage
SVR VIL VIH IINH eN
45 0.15 2 5 0 30 15 -1
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ELECTRICAL CHARACTERISTICS(Cont.)
FOR VOUT=3.2V PARAMETER Operating Input Voltage Output Voltage Short Circuit Current Line Regulation SYMBOL VI(OPR) VOUT ISC VOUT
LINEAR INTEGRATED CIRCUIT
TEST CONDITIONS VIN=4.2V IOUT=1 ~ 150mA RL=0 VIN=VOUT+1V ~ 16V, IOUT=1mA IOUT=0 TJ=-20 ~ 125C, IOUT =0 IOUT=1mA IOUT=1mA, TJ=-20 ~ 125C IOUT=10mA IOUT=10mA, TJ=-20 ~ 125C IOUT=50mA IOUT=50mA, TJ=-20 ~ 125C IOUT=150mA IOUT=150mA, TJ=-20 ~ 125C IOUT=0 TJ=-20 ~ 125C, IOUT=0 IOUT=1mA IOUT=1mA, TJ=-20 ~ 125C IOUT=10mA IOUT=10mA, TJ=-20 ~ 125C IOUT=50mA IOUT=50mA, TJ=-20 ~ 125C IOUT=150mA IOUT=150mA, TJ=-20 ~ 125C OFF MODE VINH<0.18V OFF MODE VINH<0.18V TJ=-20 ~ 125C CBYP=0.01F, CO=10F, f=1KHz TJ=-20 ~ 125C TJ=-20 ~ 125C TJ=-20 ~ 125C, VSHDN=5V TJ=-20 ~ 125C, VSHDN=0V B=300Hz ~ 50KHz CBYP=0.01F, CO=10F
MIN 3.136 3.104
TYP 3.2 400 1 7 40 120 280 80 100 200 600 2000 0
MAX 16 3.264 3.296 30 3 5 10 15 60 90 150 225 350 575 100 150 150 200 300 400 1050 1200 3000 4000 2
Dropout Voltage
VD
Quiescent Current
IQ
UNIT V V V mA mV mV mV mV mV mV mV mV mV mV mV A A A A A A A A A A A A dB V V A A V
Supply Voltage Rejection Control Input Logic Low Control Input Logic High Control Input Current Output Noise Voltage
SVR VIL VIH IINH eN
45 0.15 2 5 0 30 15 -1
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ELECTRICAL CHARACTERISTICS(Cont.)
FOR VOUT=3.3V PARAMETER Operating Input Voltage Output Voltage Short Circuit Current Line Regulation SYMBOL VI(OPR) VOUT ISC VOUT
LINEAR INTEGRATED CIRCUIT
TEST CONDITIONS VIN=4.3V IOUT=1 ~ 150mA RL=0 VIN=VOUT+1V ~ 16V, IOUT=1mA IOUT=0 TJ=-20 ~ 125C, IOUT =0 IOUT=1mA IOUT=1mA, TJ=-20 ~ 125C IOUT=10mA IOUT=10mA, TJ=-20 ~ 125C IOUT=50mA IOUT=50mA, TJ=-20 ~ 125C IOUT=150mA IOUT=150mA, TJ=-20 ~ 125C IOUT=0 TJ=-20 ~ 125C, IOUT=0 IOUT=1mA IOUT=1mA, TJ=-20 ~ 125C IOUT=10mA IOUT=10mA, TJ=-20 ~ 125C IOUT=50mA IOUT=50mA, TJ=-20 ~ 125C IOUT=150mA IOUT=150mA, TJ=-20 ~ 125C OFF MODE VINH<0.18V OFF MODE VINH<0.18V TJ=-20 ~ 125C CBYP=0.01F, CO=10F, f=1KHz TJ=-20 ~ 125C TJ=-20 ~ 125C TJ=-20 ~ 125C, VSHDN=5V TJ=-20 ~ 125C, VSHDN=0V B=300Hz ~ 50KHz CBYP=0.01F, CO=10F
MIN 3.234 3.201
TYP 3.3 400 1 7 40 120 280 80 100 200 600 2000 0
MAX 16 3.366 3.399 30 3 5 10 15 60 90 150 225 350 575 100 150 150 200 300 400 1050 1200 3000 4000 2
Dropout Voltage
VD
Quiescent Current
IQ
UNIT V V V mA mV mV mV mV mV mV mV mV mV mV mV A A A A A A A A A A A A dB V V A A V
Supply Voltage Rejection Control Input Logic Low Control Input Logic High Control Input Current Output Noise Voltage
SVR VIL VIH IINH eN
45 0.15 2 5 0 30 15 -1
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ELECTRICAL CHARACTERISTICS(Cont.)
FOR VOUT=3.5V PARAMETER Operating Input Voltage Output Voltage Short Circuit Current Line Regulation SYMBOL VI(OPR) VOUT ISC VOUT
LINEAR INTEGRATED CIRCUIT
TEST CONDITIONS VIN=4.5V IOUT=1 ~ 150mA RL=0 VIN=VOUT+1V ~ 16V, IOUT=1mA IOUT=0 TJ=-20 ~ 125C, IOUT =0 IOUT=1mA IOUT=1mA, TJ=-20 ~ 125C IOUT=10mA IOUT=10mA, TJ=-20 ~ 125C IOUT=50mA IOUT=50mA, TJ=-20 ~ 125C IOUT=150mA IOUT=150mA, TJ=-20 ~ 125C IOUT=0 TJ=-20 ~ 125C, IOUT=0 IOUT=1mA IOUT=1mA, TJ=-20 ~ 125C IOUT=10mA IOUT=10mA, TJ=-20 ~ 125C IOUT=50mA IOUT=50mA, TJ=-20 ~ 125C IOUT=150mA IOUT=150mA, TJ=-20 ~ 125C OFF MODE VINH<0.18V OFF MODE VINH<0.18V TJ=-20 ~ 125C CBYP=0.01F, CO=10F, f=1KHz TJ=-20 ~ 125C TJ=-20 ~ 125C TJ=-20 ~ 125C, VSHDN=5V TJ=-20 ~ 125C, VSHDN=0V B=300Hz ~ 50KHz CBYP=0.01F, CO=10F
MIN 3.430 3.395
TYP 3.5 400 1 7 40 120 280 80 100 200 600 2000 0
MAX 16 3.570 3.605 30 3 5 10 15 60 90 150 225 350 575 100 150 150 200 300 400 1050 1200 3000 4000 2
Dropout Voltage
VD
Quiescent Current
IQ
UNIT V V V mA mV mV mV mV mV mV mV mV mV mV mV A A A A A A A A A A A A dB V V A A V
Supply Voltage Rejection Control Input Logic Low Control Input Logic High Control Input Current Output Noise Voltage
SVR VIL VIH IINH eN
45 0.15 2 5 0 30 15 -1
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ELECTRICAL CHARACTERISTICS(Cont.)
FOR VOUT=3.6V PARAMETER Operating Input Voltage Output Voltage Short Circuit Current Line Regulation SYMBOL VI(OPR) VOUT ISC VOUT
LINEAR INTEGRATED CIRCUIT
TEST CONDITIONS VIN=4.6V IOUT=1 ~ 150mA RL=0 VIN=VOUT+1V ~ 16V, IOUT=1mA IOUT=0 TJ=-20 ~ 125C, IOUT =0 IOUT=1mA IOUT=1mA, TJ=-20 ~ 125C IOUT=10mA IOUT=10mA, TJ=-20 ~ 125C IOUT=50mA IOUT=50mA, TJ=-20 ~ 125C IOUT=150mA IOUT=150mA, TJ=-20 ~ 125C IOUT=0 TJ=-20 ~ 125C, IOUT=0 IOUT=1mA IOUT=1mA, TJ=-20 ~ 125C IOUT=10mA IOUT=10mA, TJ=-20 ~ 125C IOUT=50mA IOUT=50mA, TJ=-20 ~ 125C IOUT=150mA IOUT=150mA, TJ=-20 ~ 125C OFF MODE VINH<0.18V OFF MODE VINH<0.18V TJ=-20 ~ 125C CBYP=0.01F, CO=10F, f=1KHz TJ=-20 ~ 125C TJ=-20 ~ 125C TJ=-20 ~ 125C, VSHDN=5V TJ=-20 ~ 125C, VSHDN=0V B=300Hz ~ 50KHz CBYP=0.01F, CO=10F
MIN 3.528 3.492
TYP 3.6 400 1 7 40 120 280 80 100 200 600 2000 0
MAX 16 3.672 3.708 30 3 5 10 15 60 90 150 225 350 575 100 150 150 200 300 400 1050 1200 3000 4000 2
Dropout Voltage
VD
Quiescent Current
IQ
UNIT V V V mA mV mV mV mV mV mV mV mV mV mV mV A A A A A A A A A A A A dB V V A A V
Supply Voltage Rejection Control Input Logic Low Control Input Logic High Control Input Current Output Noise Voltage
SVR VIL VIH IINH eN
45 0.15 2 5 0 30 15 -1
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ELECTRICAL CHARACTERISTICS(Cont.)
FOR VOUT=3.8V PARAMETER Operating Input Voltage Output Voltage Short Circuit Current Line Regulation SYMBOL VI(OPR) VOUT ISC VOUT
LINEAR INTEGRATED CIRCUIT
TEST CONDITIONS VIN=4.8V IOUT=1 ~ 150mA RL=0 VIN=VOUT+1V ~ 16V, IOUT=1mA IOUT=0 TJ=-20 ~ 125C, IOUT =0 IOUT=1mA IOUT=1mA, TJ=-20 ~ 125C IOUT=10mA IOUT=10mA, TJ=-20 ~ 125C IOUT=50mA IOUT=50mA, TJ=-20 ~ 125C IOUT=150mA IOUT=150mA, TJ=-20 ~ 125C IOUT=0 TJ=-20 ~ 125C, IOUT=0 IOUT=1mA IOUT=1mA, TJ=-20 ~ 125C IOUT=10mA IOUT=10mA, TJ=-20 ~ 125C IOUT=50mA IOUT=50mA, TJ=-20 ~ 125C IOUT=150mA IOUT=150mA, TJ=-20 ~ 125C OFF MODE VINH<0.18V OFF MODE VINH<0.18V TJ=-20 ~ 125C CBYP=0.01F, CO=10F, f=1KHz TJ=-20 ~ 125C TJ=-20 ~ 125C TJ=-20 ~ 125C, VSHDN=5V TJ=-20 ~ 125C, VSHDN=0V B=300Hz ~ 50KHz CBYP=0.01F, CO=10F
MIN 3.724 3.686
TYP 3.8 400 1 7 40 120 280 80 100 200 600 2000 0
MAX 16 3.876 3.914 30 3 5 10 15 60 90 150 225 350 575 100 150 150 200 300 400 1050 1200 3000 4000 2
Dropout Voltage
VD
Quiescent Current
IQ
UNIT V V V mA mV mV mV mV mV mV mV mV mV mV mV A A A A A A A A A A A A dB V V A A V
Supply Voltage Rejection Control Input Logic Low Control Input Logic High Control Input Current Output Noise Voltage
SVR VIL VIH IINH eN
45 0.15 2 5 0 30 15 -1
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ELECTRICAL CHARACTERISTICS(Cont.)
FOR VOUT=4.0V PARAMETER Operating Input Voltage Output Voltage Short Circuit Current Line Regulation SYMBOL VI(OPR) VOUT ISC VOUT
LINEAR INTEGRATED CIRCUIT
TEST CONDITIONS VIN=5.0V IOUT=1 ~ 150mA RL=0 VIN=VOUT+1V ~ 16V, IOUT=1mA IOUT=0 IOUT=1mA IOUT=10mA IOUT=50mA IOUT=150mA IOUT=0 IOUT=1mA IOUT=10mA IOUT=50mA IOUT=150mA OFF MODE VINH<0.18V CBYP=0.01F, CO=10F, f=1KHz TJ=-20 ~ 125C TJ=-20 ~ 125C TJ=-20 ~ 125C, VSHDN=5V TJ=-20 ~ 125C, VSHDN=0V B=300Hz ~ 50KHz CBYP=0.01F, CO=10F
MIN 3.920 3.880
TYP 4 400 1
MAX 16 4.080 4.120 30 3 30 87 175 350 100 150 300 1050 3000
Dropout Voltage
VD
Quiescent Current
IQ
Supply Voltage Rejection Control Input Logic Low Control Input Logic High Control Input Current Output Noise Voltage
SVR VIL VIH IINH eN
280 80 100 200 600 2000 0 45 2 5 0 30
0.15 15 -1
UNIT V V V mA mV mV mV mV mV mV A A A A A A dB V V A A V
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ELECTRICAL CHARACTERISTICS(Cont.)
FOR VOUT=4.7V PARAMETER Operating Input Voltage Output Voltage Short Circuit Current Line Regulation SYMBOL VI(OPR) VOUT ISC VOUT
LINEAR INTEGRATED CIRCUIT
TEST CONDITIONS VIN=5.7V IOUT=1 ~ 150mA RL=0 VIN=VOUT+1V ~ 16V, IOUT=1mA IOUT=0 TJ=-20 ~ 125C, IOUT =0 IOUT=1mA IOUT=1mA, TJ=-20 ~ 125C IOUT=10mA IOUT=10mA, TJ=-20 ~ 125C IOUT=50mA IOUT=50mA, TJ=-20 ~ 125C IOUT=150mA IOUT=150mA, TJ=-20 ~ 125C IOUT=0 TJ=-20 ~ 125C, IOUT=0 IOUT=1mA IOUT=1mA, TJ=-20 ~ 125C IOUT=10mA IOUT=10mA, TJ=-20 ~ 125C IOUT=50mA IOUT=50mA, TJ=-20 ~ 125C IOUT=150mA IOUT=150mA, TJ=-20 ~ 125C OFF MODE VINH<0.18V OFF MODE VINH<0.18V TJ=-20 ~ 125C CBYP=0.01F, CO=10F, f=1KHz TJ=-20 ~ 125C TJ=-20 ~ 125C TJ=-20 ~ 125C, VSHDN=5V TJ=-20 ~ 125C, VSHDN=0V B=300Hz ~ 50KHz CBYP=0.01F, CO=10F
MIN 4.606 4.559
TYP 4.7 400 1 7 40 120 280 80 100 200 600 2000 0
MAX 16 4.794 4.841 30 3 5 10 15 60 90 150 225 350 575 100 150 150 200 300 400 1050 1200 3000 4000 2
Dropout Voltage
VD
Quiescent Current
IQ
UNIT V V V mA mV mV mV mV mV mV mV mV mV mV mV A A A A A A A A A A A A dB V V A A V
Supply Voltage Rejection Control Input Logic Low Control Input Logic High Control Input Current Output Noise Voltage
SVR VIL VIH IINH eN
45 0.15 2 5 0 30 15 -1
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ELECTRICAL CHARACTERISTICS(Cont.)
FOR VOUT=5.0V PARAMETER Operating Input Voltage Output Voltage Short Circuit Current Line Regulation SYMBOL VI(OPR) VOUT ISC VOUT
LINEAR INTEGRATED CIRCUIT
TEST CONDITIONS VIN=6.0V IOUT=1 ~ 150mA RL=0 VIN=VOUT+1V ~ 16V, IOUT=1mA IOUT=0 TJ=-20 ~ 125C, IOUT =0 IOUT=1mA IOUT=1mA, TJ=-20 ~ 125C IOUT=10mA IOUT=10mA, TJ=-20 ~ 125C IOUT=50mA IOUT=50mA, TJ=-20 ~ 125C IOUT=150mA IOUT=150mA, TJ=-20 ~ 125C IOUT=0 TJ=-20 ~ 125C, IOUT=0 IOUT=1mA IOUT=1mA, TJ=-20 ~ 125C IOUT=10mA IOUT=10mA, TJ=-20 ~ 125C IOUT=50mA IOUT=50mA, TJ=-20 ~ 125C IOUT=150mA IOUT=150mA, TJ=-20 ~ 125C OFF MODE VINH<0.18V OFF MODE VINH<0.18V TJ=-20 ~ 125C CBYP=0.01F, CO=10F, f=1KHz TJ=-20 ~ 125C TJ=-20 ~ 125C TJ=-20 ~ 125C, VSHDN=5V TJ=-20 ~ 125C, VSHDN=0V B=300Hz ~ 50KHz CBYP=0.01F, CO=10F
MIN 4.900 4.850
TYP 5 400 1 7 40 120 280 80 100 200 600 2000 0
MAX 16 5.100 5.150 30 3 5 10 15 60 90 150 225 350 575 100 150 150 200 300 400 1050 1200 3000 4000 2
Dropout Voltage
VD
Quiescent Current
IQ
UNIT V V V mA mV mV mV mV mV mV mV mV mV mV mV A A A A A A A A A A A A dB V V A A V
Supply Voltage Rejection Control Input Logic Low Control Input Logic High Control Input Current Output Noise Voltage
SVR VIL VIH IINH eN
45 0.15 2 5 0 30 15 -1
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LD2985
REVERSE CURRENT TEST CIRCUIT
LINEAR INTEGRATED CIRCUIT
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LD2985
APPLICATION INFORMATION
LINEAR INTEGRATED CIRCUIT
EXTERNAL CAPACITORS Like any low-dropout regulator, the UTC LD2985 requires external capacitors for regulator stability. This capacitor must be selected to meet the requirements of minimum capacitance and equivalent series resistance. We suggest soldering input and outputting capacitors as close as possible to the relative pins. INPUT CAPACITOR An input capacitor whose value is 1F is required with the UTC LD2985 (amount of capacitance can be increased without limit). This capacitor must be located a distance of not more than 0.5" from the input pin of the device and returned to a clean analog ground. Any good quality ceramic, tantalum or film capacitors can be used for this capacitor. OUTPUT CAPACITOR The UTC LD2985 is designed specifically to work with ceramic output capacitors. It may also be possible to use Tantalum capacitors, but these are not as attractive for reasons of size and cost. By the way, the output capacitor must meet both the requirement for minimum amount of capacitance and E.S.R. (equivalent series resistance) value. Due to the different loop gain, the stability improves for higher output versions and so the suggested minimum output capacitor value, if low E.S.R. ceramic type is used, is 1F for output voltages equal or major than 3.8V, 2.2F for VO going from 1.8 ~ 3.3V, and 3.3F for the other versions. However, if an output capacitor lower than the suggested one is used, it's possible to make stable the regulator adding a resistor in series to the capacitor. IMPORTANT: The output capacitor must maintain its ESR in the stable region over the full operating temperature to assure stability. Also, capacitor tolerance and variation with temperature must be considered to assure the minimum amount of capacitance is provided at all times. This capacitor should be located not more than 0.5" from the output pin of the device and returned to a clean analog ground. INHIBIT INPUT OPERATION The inhibit pin can be used to turn OFF the regulator when pulled low, so drastically reducing the current consumption down to less than 1A. When the inhibit feature is not used, this pin must be tied to Vi to keep the regulator output ON at all times. To assure proper operation, the signal source used to drive the inhibit pin must be able to swing above and below the specified thresholds listed in the electrical characteristics section under VIH VIL. Any slew rate can be used to drive the inhibit. REVERSE CURRENT The power transistor used in the UTC LD2985 has not an inherent diode connected between the regulator input and output. If the output is forced above the input, no current will flow from the output to the input across the series pass transistor. When a VREV voltage is applied on the output, the reverse current measured flows to the GND across the two feedback resistors. This current typical value is 160A. R1 and R2 resistors are implanted type; typical values are, respectively, 42.6K and 51.150K.
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Output Voltage vs Temperature 2.60 VIN=3.5V 2.58 IOUT=1mA 2.56 2.54 2.52 2.50 2.48 2.46 2.44 2.42 2.40 -50 -25 0 50 25 Tc (C) 75 100 125 0 Quiescent Current, IQ (A) Output Voltage, VOUT (V) 2000
LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS (TJ=25C, CI=1F, CO=2.2F, CBYP=100nF)
Quiescent Current vs Load Current VOUT=2.5V Cby=10nF
1600
1200
800
400
0
25
50 100 75 125 Output Current, IOUT (mA)
150
175
Dropout Voltage vs Temperature 0.4 VOUT=2.5V Cby=10nF IOUT=150mA Quiescent Current, IQ (mA) 0.3 Dropout Voltage, VD (V)
Quiescent Current vs Temperature VOUT=2.5V Cby=10nF IOUT=150mA 3.0 2.5 2.0 1.5 1.0 0.5 0 -50
3.5
0.2
IOUT=50mA
0.1 IOUT=10mA IOUT=1mA 0 -50 -25 0 50 25 Tc (C) 75 100 125
-25
0
50 25 Tc (C)
75
100
125
Dropout Voltage vs Output Current
Supply Voltage Rejection vs Temperature fosc=1KHz VIN=3.5 ~ 6.5V 90 IOUT=10mA 80 70 Co=1F 60 50 40 30 20 -50 Co=10F
250 Dropout Voltage, VD (mV)
200
150
100 VOUT=2.5V
50
0
0
25
125 75 100 50 Output Current, IOUT (mA)
150
Supply Voltage Rejection, SVR (dB)
175
-25
0
50 25 Tc (C)
75
100
125
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LD2985
Supply Voltage Rejection vs Output Current 100 80 70 Supply Voltage Rejection, SVR (dB) 80 Supply Voltage Rejection, SVR (dB) 60 50 40 30 20
LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS(Cont.) (TJ=25C, CI=1F, CO=2.2F, CBYP=100nF)
Supply Voltage Rejection vs Frequency
60
40
20
0
VIN=3.5 ~ 6.5V CO=10F fosc=1KHz
0 25 50 75 100 125 150 175 Output Current, IOUT (mA) Supply Voltage Rejection vs Output Current
VIN=3.5 ~ 6.5V IOUT=10mA 10 VOUT=2.5V CO=1F
0 1 10 10
2
10 Frequency, f (KHz) Line Transient
3
10
4
10
5
100
Tek Run:5.00MS/s
Supply Voltage Rejection, SVR (dB) 80
60 1 40 1 20
VIN
VOUT
0
VIN=3.5 ~ 6.5V CO=1F fosc=1KHz
0 25 50 75 100 125 150 175 Ch1 500mV Ch2 20.0mV M 10.0s Ch1 CH2 3.96V Output Current, IOUT (mA) Supply Voltage Rejection vs Frequency VOUT=2.5V, IOUT=50mA, no CIN, COUT=4.7F, tr=tf=20ns
Line Transient
70 Supply Voltage Rejection, SVR (dB) 60 50 40 30 1
Tek Run:5.00MS/s
VIN
VOUT
20 10
0 1 10
VIN=2.8 ~ 5.8V IOUT=10mA VOUT=1.8V CO=10F
10
2
2
10
3
10
4
10
5
CH2 Ch1 500mV Ch2 20.0mV M 10.0s Ch1
3.96V
Frequency, f (KHz)
VOUT=2.5V, IOUT=50mA, no CIN, COUT=4.7F, tr=tf=1s
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QW-R102-024.G
LD2985
LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS(Cont.) (TJ=25C, CI=1F, CO=2.2F, CBYP=100nF)
UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice.
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