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| SC82 120mA LDO REGULATOR R1140Q SERIES APPLICATION MANUAL NO. EA-074-0103 SC82 120mA LDO REGULATOR R1140Q SERIES OUTLINE The R1140Q Series are voltage regulator ICs with high output voltage accuracy, low supply current, low ONresistance, and high ripple rejection by CMOS process. Each of these voltage regulator ICs consists of a voltage reference unit, an error amplifier, resistors for setting Output Voltage, a current limit circuit, and a chip enable circuit. These ICs perform with low dropout voltage and a chip enable function. The line transient response and load transient response of the R1140Q Series are excellent, thus these ICs are very suitable for the power supply for hand-held communication equipment. The output voltage of these ICs is internally fixed with high accuracy. Since the package for these ICs is SC-82AB (Super Mini-mold) package, high density mounting of the ICs on boards is possible. FEATURES * Ultra-Low Supply Current ................................................... TYP 75A . * Standby Mode ....................................................................... TYP 0.1A . * Low Dropout Voltage ........................................................... TYP 0.15V (IOUT=100mA Output Voltage=3.0V Type) . * High Ripple Rejection .......................................................... TYP 75dB (f=1kHz) . * Low Temperature-Drift Coefficient of Output Voltage....... TYP 100ppm/C . * Excellent Line Regulation.................................................... TYP 0.05%/V . * High Output Voltage Accuracy ............................................ 2.0% * Excellent Dynamic Response * Small Package ....................................................................... SC-82AB (Super Mini-mold) * Output Voltage...................................................................... Stepwise setting with a step of 0.1V in the range of 1.5V to 4.0V is possible * Built-in chip enable circuit (B/D: active high) * Built-in fold-back protection circuit..................................... TYP 40mA (Current at short mode) . APPLICATIONS * Power source for cellular phones such as GSM, CDMA and various kinds of PCS. * Power source for electrical appliances such as cameras, VCRs and camcorders. * Power source for battery-powered equipment. 1 R1140Q BLOCK DIAGRAM R1140Qxx xx1B xx 4 VDD 1 VOUT 4 VDD R1140Qxx xx1D xx 1 VOUT Vref CE 3 Current Limit GND 2 CE 3 Vref Current Limit GND 2 SELECTION GUIDE The output voltage, mask option, and the taping type for the ICs can be selected at the user's request. The selection can be made by designating the part number as shown below; R1140Qxx1x-xx ab c d Code a b Designation of Package Type : Q: SC82-AB (Super Mini-mold) Setting Output Voltage (VOUT) : Stepwise setting with a step of 0.1V in the range of 1.5V to 4.0V is possible. Designation of Mask Option : c B: Without auto discharge function at OFF state. D: With auto discharge function at OFF state. d Designation of Taping Type : Ex. TR, TL (refer to Taping Specifications; TR type is the standard direction.) Contents Part Number 2 R1140Q PIN CONFIGURATION SC-82AB 4 3 Mark side 1 2 PIN DESCRIPTION Pin No. 1 2 3 4 Symbol VOUT GND CE VDD Output pin Ground Pin Chip Enable Pin Input Pin Description ABSOLUTE MAXIMUM RATINGS Symbol VIN VCE VOUT IOUT PD Topt Tstg Input Voltage Input Voltage (CE Pin) Output Voltage Output Current Power Dissipation Operating Temperature Range Storage Temperature Range Item Rating 6.5 -0.3 VIN+0.3 -0.3 VIN+0.3 140 150 -40 85 -55 125 Unit V V V mA mW C C 3 R1140Q ELECTRICAL CHARACTERISTICS * R1140Qxx xx1B/R1140Qxx xx1D xx xx Symbol VOUT IOUT Item Output Voltage Output Current Conditions VIN = Set VOUT+1V 1mA IOUT 30mA VIN -VOUT = 1.0V VIN = Set VOUT+1V 1mA IOUT 120mA AGE VIN = Set VOUT+1V VIN = VCE = Set VOUT+1V Set VOUT+0.5V VIN 6V VOUT/VIN Line Regulation IOUT = 30mA , (In case that VOUT1.6V 2.2V VIN 6V) f = 1kHz, Ripple 0.5Vp-p VIN = Set VOUT+1V, RR Ripple Rejection IOUT = 30mA , (In case that VOUT1.7V VINVOUT=1.2V) VIN VOUT/T ILIM RPU VCEH VCEL en RLOW Input Voltage Output Voltage Temperature Coefficient Short Current Limit ---- CE Pull-up Resistance ---- CE Input Voltage "H" ---- CE Input Voltage "L " Output Noise Low Output Nch Tr. ON Resistance (of D version) IOUT = 30mA -40C Topt 85C VOUT = 0V 1.5 1.5 0.0 BW=10Hz to 100kHz VCE=0V 30 70 2.2 100 40 4 16 VIN 0.3 6.0 V ppm /C mA M V V Vrms 75 dB 0.05 0.20 %/V 75 0.1 150 1.0 A A MIN. VOUT x0.98 120 12 40 TYP. MAX. VOUT x1.02 Topt=25C Unit V mA mV VOUT/IOUT Load Regulation VDIF ISS Istandby Dropout Voltage Supply Current Supply Current (Standby) Refer to the ELECTRICAL CHARACTERISTICS by OUTPUT VOLT- 4 R1140Q * ELECTRICAL CHARACTERISTICS by OUTPUT VOLTAGE Topt = 25C Dropout Voltage Output Voltage VOUT (V) Condition 1.5 VOUT 1.6 1.7 VOUT 1.8 1.9 VOUT 2.0 2.1 VOUT 2.7 2.8 VOUT 4.0 IOUT = 120mA VDIF (V) TYP. 0.36 0.30 0.28 0.24 0.18 MAX. 0.70 0.50 0.45 0.40 0.30 TECHNICAL NOTES When using these ICs, consider the following points: Phase Compensation In these ICs, phase compensation is made for securing stable operation even if the load current is varied. For this purpose, be sure to use a 2.2F or more capacitor COUT with good frequency characteristics and ESR (Equivalent Series Resistance). (Note: When the additional ceramic capacitors are connected to the Output Pin with Output capacitor for phase compensation, the operation might be unstable. Because of this, test these ICs with as same external components as ones to be used on the PCB.) PCB Layout Make VDD and GND line sufficient. When the impedance of these is high, it would be a cause of picking up the noise or unstable operation. Connect a capacitor with as much as 1.0F capacitor between VDD and GND pin as close as possible. Set external components, especially output capacitor as close as possible to the ICs and make wiring shortest. 5 R1140Q TEST CIRCUITS 1 VOUT V IOUT VOUT VDD 4 R1140Q SERIES 2 GND CE 3 C1 C2 C1=Tantal 1.0F C2=Tantal 2.2F Fig.1 Standard test Circuit 1 VOUT VDD 4 A C1 ISS C2 R1140Q SERIES 2 GND CE 3 C1=Tantal 1.0F C2=Tantal 2.2F Fig.2 Supply Current Test Circuit 1 VOUT VDD 4 IOUT C2 R1140Q SERIES 2 GND CE 3 PG Pulse Generator Fig.3 Ripple Rejection, Line Transient Response Test Circuit 1 VOUT VDD 4 C2 IOUTa IOUTb R1140Q SERIES 2 GND CE 3 C1 C1=Tantal 1.0F C2=Tantal 2.2F Fig.4 Load Transient Response Test Circuit 6 R1140Q TYPICAL APPLICATION OUT C2 1 VOUT VDD 4 IN R1140Q SERIES 2 GND CE 3 C1 (External Components) Output Capacitor; Tantalum Type 7 R1140Q TYPICAL CHARACTERISTICS 1) Output Voltage vs. Output Current R1140Q151x x 1.6 1.4 Output Voltage VOUT (V) R1140Q281x x 3 3.5V Output Voltage VOUT (V) 4.8V 2.5 2 1.5 3.8V 1 0.5 0 3.3V VIN=3.1V VIN=1.8V 1.2 1 0.8 2.0V 2.5V 0.6 0.4 0.2 0 0 0.05 0.1 0.15 0.2 0.25 Output Current IOUT (A) 0.3 0 0.05 0.1 0.15 0.2 0.25 Output Current IOUT (A) 0.3 R1140Q401x x 4.5 4 Output Voltage VOUT (V) 6.0V VIN=4.3V 4.5V 3.5 3 2.5 2 1.5 1 0.5 0 0 0.05 5.0V 0.1 0.15 0.2 0.25 Output Current IOUT (A) 0.3 2) Output Voltage vs. Input Voltage R1140Q151x x 1.6 1.5 1.4 1.3 1.2 1.1 2.1 1 1 2 3 4 Input Voltage VIN (V) 5 6 2 1 2 3 4 Input Voltage VIN (V) 5 6 2.9 2.8 Output Voltage VOUT (V) R1140Q281x x Output Voltage VOUT (V) 2.7 2.6 2.5 2.4 2.3 2.2 1mA 30mA 50mA 1mA 30mA 50mA 8 R1140Q R1140Q401x x 4.2 4 3.8 3.6 3.4 3.2 3 1 2 3 4 Input Voltage VIN (V) 5 6 1mA 30mA 50mA 3) Dropout Voltage vs. Output Current R1140Q151x x 1.2 1 0.8 0.6 0.4 0.2 0 0 20 40 60 80 100 Output Current IOUT (mA) 120 85C 25C -40C Output Voltage VOUT (V) R1140Q281x x 0.25 85C 25C -40C Dropout Voltage VDIF (V) Dropout Voltage VDIF (V) 0.2 0.15 0.1 0.05 0 0 20 60 80 100 40 Output Current IOUT (mA) 120 R1140Q401x x 0.2 0.18 85C 25C -40C Dropout Voltage VDIF (V) 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 0 20 40 60 80 100 Output Current IOUT (mA) 120 9 R1140Q 4) Output Voltage vs. Temperature R1140Q151x x 1.54 1.53 Output Voltage VOUT (V) R1140Q281x x 2.86 2.84 2.82 2.80 2.78 2.76 2.74 -50 1.52 1.51 1.50 1.49 1.48 1.47 1.46 -50 -25 0 25 50 Temperature Topt (C) 75 100 Output Voltage VOUT (V) -25 0 25 50 Temperature Topt (C) 75 100 R1140Q401x x 4.08 4.06 Output Voltage VOUT (V) 4.04 4.02 4.00 3.98 3.96 3.94 3.92 -50 -25 0 25 50 Temperature Topt (C) 75 100 5) Supply Current vs. Input Voltage R1140Q151x x 90 80 Supply Current ISS (A) Supply Current ISS (A) 90 80 70 60 50 40 30 20 10 0 R1140Q281x x 70 60 50 40 30 20 10 0 1 2 3 4 Input Voltage VIN (V) 5 6 1 2 3 4 Input Voltage VIN (V) 5 6 10 R1140Q R1140Q401x x 90 80 Supply Current ISS (A) 70 60 50 40 30 20 10 0 1 2 3 4 Input Voltage VIN (V) 5 6 6) Supply Current vs. Temperature R1140Q151x x VIN=2.5V 200 200 R1140Q281x x VIN=3.8V Supply Current ISS (A) 120 Supply Current ISS (A) 160 160 120 80 80 40 0 -50 40 0 -50 0 50 Temperature Topt (C) 100 0 50 Temperature Topt (C) 100 R1140Q401x x VIN=5.0V 200 Supply Current ISS (A) 160 120 80 40 0 -50 0 50 Temperature Topt (C) 100 11 R1140Q 7) Dropout Voltage vs. Set Output Voltage 1 0.9 Dropout Voltage VDIF (V) 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 1.5 2.5 3.5 Set Output Voltage Vreg (V) 10mA 30mA 50mA 120mA 8) Ripple Rejection vs. Frequency R1140Q151x x -90 -80 Ripple Rejection RR (dB) R1140Q151x x -90 -80 VIN=2.5VDC+0.5Vp-p COUT=tantal 2.2F, Topt=25C VIN=2.5VDC+0.5Vp-p COUT=tantal 1.0F, Topt=25C -70 -60 -50 -40 -30 -20 -10 0 0.1 1.0 10.0 Frequency (kHz) 100.0 50mA 1mA 30mA Ripple Rejection RR (dB) -70 -60 -50 -40 -30 -20 -10 0 0.1 1.0 10.0 Frequency (kHz) 100.0 50mA 1mA 30mA R1140Q281x x -90 -80 VIN=3.8VDC+0.5Vp-p COUT=tantal 1.0F, Topt=25C -90 -80 Ripple Rejection RR (dB) R1140Q281x x VIN=3.8VDC+0.5Vp-p COUT=tantal 2.2F, Topt=25C Ripple Rejection RR (dB) -70 -60 -50 -40 -30 -20 -10 0 0.1 1.0 10.0 Frequency (kHz) 100.0 50mA 1mA 30mA -70 -60 -50 -40 -30 -20 -10 0 0.1 1.0 10.0 Frequency (kHz) 100.0 50mA 1mA 30mA 12 R1140Q R1140Q401x x -90 -80 VIN=5.0VDC+0.5Vp-p COUT=tantal 1.0F, Topt=25C -90 -80 R1140Q401x x VIN=5.0VDC+0.5Vp-p COUT=tantal 2.2F, Topt=25C Ripple Rejection RR (dB) -70 -60 -50 -40 -30 -20 -10 0 0.1 1.0 10.0 Frequency (kHz) 100.0 50mA 1mA 30mA Ripple Rejection RR (dB) -70 -60 -50 -40 -30 -20 -10 0 0.1 1.0 10.0 Frequency (kHz) 100.0 50mA 1mA 30mA 9) Ripple Rejection vs. Input Bias R1140Q281x x IOUT=1mA 80 70 Ripple Rejection RR (dB) Ripple Rejection RR (dB) R1140Q281x x IOUT=30mA 100 90 80 70 60 50 40 30 20 10 0 2.9 1kHz 10kHz 100kHz 60 50 40 30 20 10 0 2.9 3 3.1 3.2 Input Voltage VIN (V) 3.3 1kHz 10kHz 100kHz 3 3.1 3.2 Input Voltage VIN (V) 3.3 R1140Q281x x IOUT=50mA 90 80 Ripple Rejection RR (dB) 70 60 50 40 30 20 10 0 2.9 1kHz 10kHz 100kHz 3 3.1 3.2 Input Voltage VIN (V) 3.3 13 R1140Q 10) Input Transient Response R1140Q281x x VIN=3.8V 4.8V, tr=tf=5s COUT=tantal 1.0F, IOUT=30mA 6 5 VIN 4 3 2 1 0 100 Input Voltage VIN (V) Input Voltage VIN (V) Output Voltage VOUT (V) 2.80 2.79 2.78 2.77 0 VOUT 10 20 30 40 50 Time t (s) 60 70 80 90 R1140Q281x x VIN=3.8V 4.8V, tr=tf=5s COUT=tantal 2.2F, IOUT=30mA 6 5 VIN 4 3 2 1 0 100 Output Voltage VOUT (V) 2.80 2.79 2.78 2.77 0 VOUT 10 20 30 40 50 Time t (s) 60 70 80 90 14 R1140Q R1140Q281x x VIN=3.8V 4.8V, tr=tf=5s COUT=tantal 6.8F, IOUT=30mA 6 5 VIN 4 3 2 1 0 100 Output Voltage VOUT (V) 2.80 2.79 2.78 2.77 0 VOUT 10 20 30 40 50 Time t (s) 60 70 80 90 11) Load Transient Response R1140Q281x x VIN=3.8V, CIN=tantal 1.0F COUT=tantal 1.0F 150 VIN 50 0 2.85 VOUT 2.80 2.75 2.70 -4 -2 0 2 4 6 Time t (s) 8 10 12 14 16 Output Current IOUT (mA) Output Voltage VOUT (V) 100 Input Voltage VIN (V) 15 R1140Q R1140Q281x x VIN=3.8V, CIN=tantal 1.0F COUT=tantal 2.2F 150 Output Current IOUT (mA) Output Current IOUT (mA) Output Voltage VOUT (V) 100 VIN 50 0 VOUT 2.80 2.75 2.70 -4 -2 0 2 4 6 Time t (s) 8 10 12 14 16 2.85 R1140Q281x x VIN=3.8V, CIN=tantal 1.0F COUT=tantal 6.8F 150 100 VIN 50 0 VOUT 2.80 2.75 2.70 -4 -2 0 2 4 6 Time t (s) 8 10 12 14 16 Output Voltage VOUT (V) 2.85 16 R1140Q TECHNICAL NOTES When using these ICs, consider the following points: In these ICs, phase compensation is made for securing stable operation even if the load current is varied. For this purpose, be sure to use a capacitor COUT with good frequency characteristics and ESR (Equivalent Series Resistance) of which is in the range described as follows: The relations between IOUT (Output Current) and ESR of Output Capacitor are shown below. The conditions when the white noise level is under 40V (Avg.) are marked as the hatched area in the graph. 100 VIN=3.8V, CIN=Ceramic1.0F COUT=Ceramic2.2H R1140Q281x x 100 VIN=3.8V, CIN=Ceramic2.2F COUT=Ceramic2.2H 10 10 ESR () 1 ESR () 0 20 40 60 80 Load Current IOUT (mA) 100 120 1 0.1 0.1 0.01 0.01 0 20 40 60 80 Load Current IOUT (mA) 100 120 17 |
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