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S5U2189
1.55A CMOS
Elektronische Bauelemente
RoHS Compliant Product
Low Dropout Voltage Regulator
Description
The S5U2189 of positive,linear regulators feature low quiescent current (45A typ.) with low dropout voltage, making them ideal for battery applications. Output voltage are set at the factory and trimmed to 1.5% accuracy.These rugged devices have both Thermal Shutdown and Current Fold-back to prevent device failure under the "Worst" of operating conditions.The S5U2189 is stable with an output capacitance of 4.7F or greater.
Features
REF.
* Low Temperature Coefficient * Over-Temperature Shutdown
* Adjustable Version * Very Low Dropout Voltage * High Accurate 1.5% * Guaranteed 1.55 A output * Current Limiting * Power-Saving Shutdown Mode
A b L4 c L1 E
Millimeter Min. Max. 4.40 4.80 0.66 0.91 0.00 0.30 0.36 0.5 2.29 2.79 9.80 10.4
REF. c2 L2 e L
Millimeter Min. Max. 1.25 1.45 1.27 REF. 8.6 9.0 1.70 REF. 14.6 15.8 0 8
Applications
* PC Peripherals * Wireless Devices
* Portable Electronics * Battery Powered Widgets * Instrumentation
Functional Block Diagram
Typical Application Circuit
S5U2189
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01-Jun-2002 Rev. A
Page 1 of 7
S5U2189
Elektronische Bauelemente
1.55A CMOS Low Dropout Voltage Regulator
Absolute Maximum Ratings
Parameter
Input Max Voltage Output Current Output Voltage Operating Ambient Temperature Junction Temperature Maximum Junction Temperature Thermal Resistance Internal Power Dissipation( EDS Classification T=100 : )
Symbol
VIN IOUT VOUT Topr Tj Tj Max jc PD
Ratings
8 PD/( VIN- VO) Gnd-0.3 to VIN+0.3 -40 ~ +85 -40 ~ +125 150 5 3.0 B
Unit
V A V : : : :/W W
Electrical Characteristics VIN=VOUT(T)+2V, VEN=VIN, TA=25 : unless otherwise
Parameter Output Voltage Output Current Current Limit Load Regulation Dropout Voltage Ground Pin Current Line Regulation Input Voltage
Over Temperature Shutdown Over Temperature Hysterisis
Symbol VOUT(E)
(Note1)
Condition
IO=1mA VOUT>1.2V VOUT>1.2V IO=1mA to 1.5A 1.5VMin
-1.5% 1.55 1.55 -1 Note3 -
TYP
VOUT(T)
(Note2)
Max
1.5% 1 1000 800 600 0.15 0.1 7 1.261 VIN 0.4 0.1 0.5 2
Unit
V A A % mV A % V : : ppm/ : A V dB Vrms V V A A A A
IO ILIM REGLOAD VDROPOUT IGND REGLINE VIN OTS OTH TC IADJ VREF PSRR eN VEH VEL IEH IEL ISD
2.0 0.2 45 0.02 150 30 30 1 1.242 50 20 15 30 30 0.5
Output Voltage Temperature Coefficient ADJ Input Bias Current ADJ Reference Voltage Power Supply Rejection Output Voltage Noise EN Input Threshold EN Input Bias Current Shutdown Supply Current
VIN=5V, VADJ=1.242V f=1kHz f=10kHz f=100kHz
1.223 2.0 0 -
Io=100mA Co=4.7 F ceramic
f=10Hz~100kHz Co=4.7 F Io=10mA VIN=2.7V to 7V VIN=2.7V to 7V VEN=VIN, VIN=2.7V to 7V VEN= 0V, VIN=2.7V to 7V VIN=5.0V, VO=0, VENNote 1: VOUT (E) =Effective Output Voltage (i.e. the output voltage when "VOUT (T) + 2.0V" is provided at the VIN pin while maintaining a certain IOUT value). 2: VOUT (T) =Specified Output Voltage 3: VIN (MIN) =VOUT+VDROPOUT
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01-Jun-2002 Rev. A
Page 2 of 7
S5U2189
Elektronische Bauelemente
1.55A CMOS Low Dropout Voltage Regulator
Ordering Information(contd.)
Part Number
S5U 2189-AD
Marking
9HAD2 XXXX
Output Voltage
Adjustable
Part Number
Marking
Output Voltage
The S5U2189 of COMS regulator contains a PMOS pass transistor, voltage reference, error amplifier, overcurrent protection, and thermal shutdown. The P-channel pass transistor receives data from the error amplifier, over-current shutdown, and thermal protection circuits. During normal operation, the error amplifier compares the output voltage to a precision reference. Over-current and Thermal shutdown circuits become active when the junction temperature exceeds 140 : , or the current exceeds 2.2A. During thermal shutdown, the output voltage remains low. Normal operation is restored when the junction temperature drops below 120 : .
Detailed Description
The S5U2189 is stable with an output capacitance to ground of 4.7 F or greater. Ceramic capacitors have the lowest ESR, and will offer the best AC performance. Conversely, Aluminum Electrolytic capacitors exhibit the highest ESR, resulting in the poorest AC response. Unfortunately, large value ceramic capacitors are comparatively expensive. One option is to parallel a 0.1 F ceramic capacitor with a 10 F Aluminum Electrolytic. The benefit is low ESR, high capacitance, and low overall cost. A second capacitor is recommended between the input and ground to stabilize Vin. The input capacitor should be at least 0.1 F to have a beneficial effect. All capacitors should be placed in close proximity to the pins. A "Quiet" ground termination is desirable. This can be achieved with a "Star" connection.
External Capacitors
Enable
When pulled low, the PMOS pass transistor shuts off, and all internal circuits are powered down. In this state, the quiescent current is less than 1 A. This pin behaves much like an electronic switch.
Adjustable Version
The adjustable version uses external feedback resistors to generate an output voltage anywhere from 1.5V to 5.0V. Vadj is trimmed to 1.242V and Vout is given by the equation: VOUT=Vadj * (1+R1/R2) Feedback resistors R1 and R2 should be high enough to keep quiescent current low, but increasing R1+R2 will reduce stability. In general, R1 and R2 in the 10's of k will produce adequate stability, given reasonable layout precautions. To improve stability characteristics, keep parasitic on the ADJ pin to minimum, and lower R1 and R2 values.
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01-Jun-2002 Rev. A
Page 3 of 7
S5U2189
Elektronische Bauelemente
1.55A CMOS Low Dropout Voltage Regulator
Characteristics Curve
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Any changing of specification will not be informed individual
01-Jun-2002 Rev. A
Page 4 of 7
S5U2189
Elektronische Bauelemente
1.55A CMOS Low Dropout Voltage Regulator
http://www.SeCoSGmbH.com/
Any changing of specification will not be informed individual
01-Jun-2002 Rev. A
Page 5 of 7
S5U2189
Elektronische Bauelemente
1.55A CMOS Low Dropout Voltage Regulator
ht tp://www.SeCoSGmbH.com/
Any changing of specification will not be informed individual
01-Jun-2002 Rev. A
Page 6 of 7
S5U2189
Elektronische Bauelemente
1.55A CMOS Low Dropout Voltage Regulator
External Resistor Divider Table
R1(k [) VOUT
1.30 1.35 1.40 1.45 1.50 1.55 1.60 1.65 1.70 1.75 1.80 1.85 1.90 1.95 2.00 2.05 2.10 2.15 2.20 2.25 2.30 2.35 2.40 2.45 2.50 2.55 2.60 2.65 2.70 2.75 2.80 2.85 2.90 2.95 3.00 3.05 3.10 3.15
1
21.41 11.50 7.86 5.97 4.81 4.03 3.47 3.04 2.71 2.44 2.23 2.04 1.89 1.75 1.64 1.54 1.45 1.37 1.30 1.23 1.17 1.12 1.07 1.03 0.99 0.95 0.91 0.88 0.85 0.82 0.80 0.77 0.75 0.73 0.71 0.69 0.67 0.65
2
5
10
20
50
R2(k[ )=(1.242*R1(k [ ))/(VOUT-1.242) 42.83 107.07 214.14 428.28 1070.7 23.00 15.72 11.94 9.63 8.06 6.94 6.09 5.42 4.89 4.45 4.09 3.78 3.51 3.28 3.07 2.90 2.74 2.59 2.46 2.35 2.24 2.15 2.06 1.97 1.90 1.83 1.76 1.70 1.65 1.59 1.54 1.50 1.45 1.41 1.37 1.34 1.30 57.50 115.00 230.00 575.00 39.30 29.86 24.07 20.16 17.35 15.22 13.56 12.22 11.13 10.21 9.44 8.77 8.19 7.69 7.24 6.84 6.48 6.16 5.87 5.60 5.36 5.14 4.94 4.75 4.57 4.41 4.26 4.12 3.99 3.86 3.75 3.64 3.53 3.43 3.34 3.25 78.61 157.22 393.04 59.71 119.42 298.56 48.14 40.32 34.69 30.44 27.12 24.45 22.26 20.43 18.88 17.54 16.39 15.37 14.48 13.68 12.96 12.32 11.74 11.21 10.73 10.28 9.87 9.50 9.15 8.82 8.52 8.24 7.97 7.72 7.49 7.27 7.06 6.87 6.68 6.51 96.28 240.70 80.65 201.62 68.39 173.46 60.88 152.21 54.24 135.59 48.90 122.24 44.52 111.29 40.86 102.14 37.75 35.08 32.77 30.74 28.95 27.36 25.93 24.65 23.48 22.42 21.45 20.56 19.75 18.99 18.29 17.64 17.04 16.47 15.94 15.45 14.98 14.54 14.13 13.74 13.37 13.02 94.38 87.71 81.93 76.86 72.38 68.39 64.82 61.61 58.70 56.05 53.63 51.41 49.36 47.48 45.73 44.11 42.59 41.18 39.86 38.62 37.45 36.36 35.32 34.35 33.42 32.55
R1(k [) VOUT
3.20 3.25 3.30 3.35 3.40 3.45 3.50 3.55 3.60 3.65 3.70 3.75 3.80 3.85 3.90 3.95 4.00 4.05 4.10 4.15 4.20 4.25 4.30 4.35 4.40 4.45 4.50 4.55 4.60 4.65 4.70 4.75 4.80 4.85 4.90 4.95 5.00
1
0.63 0.62 0.60 0.59 0.58 0.56 0.55 0.54 0.53 0.52 0.51 0.50 0.49 0.48 0.47 0.46 0.45 0.44 0.43 0.43 0.42 0.41 0.41 0.40 0.39 0.39 0.38 0.38 0.37 0.36 0.36 0.35 0.35 0.34 0.34 0.33 0.33
2
1.27 1.24 1.21 1.18 1.15 1.13 1.10 1.08 1.05 1.03 1.01 0.99 0.97 0.95 0.93 0.92 0.90 0.88 0.87 0.85 0.84 0.83 0.81 0.80 0.79 0.77 0.76 0.75 0.74 0.73 0.72 0.71 0.70 0.69 0.68 0.67 0.66
5
3.17 3.09 3.02 2.95 2.88 2.81 2.75 2.69 2.63 2.58 2.53 2.48 2.43 2.38 2.34 2.29 2.25 2.21 2.17 2.14 2.10 2.06 2.03 2.00 1.97 1.94 1.91 1.88 1.85 1.82 1.80 1.77 1.75 1.72 1.70 1.67 1.65
10
6.34 6.19 6.03 5.89 5.76 5.63 5.50 5.38 5.27 5.16 5.05 4.95 4.86 4.76 4.67 4.59 4.50 4.42 4.35 4.27 4.20 4.13 4.06 4.00 3.93 3.87 3.81 3.75 3.70 3.64 3.59 3.54 3.49 3.44 3.40 3.35 3.30
20
12.69 12.37 12.07 11.78 11.51 11.25 11.00 10.76 10.53 10.32 10.11 9.90 9.71 9.52 9.35 9.17 9.01 8.85 8.69 8.54 8.40 8.26 8.12 7.99 7.87 7.74 7.62 7.51 7.40 7.29 7.18 7.08 6.98 6.88 6.79 6.70 6.61
50
31.72 30.93 30.17 29.46 28.78 28.13 27.50 26.91 26.34 25.79 25.26 24.76 24.28 23.81 23.36 22.93 22.52 22.12 21.73 21.35 20.99 20.64 20.31 19.98 19.66 19.36 19.06 18.77 18.49 18.22 17.96 17.70 17.45 17.21 16.98 16.75 16.52
R2(k[ )=(1.242*R1(k[ ))/(VOUT-1.242)
Note: Small load (greater than 2mA) is necessary as R1 or R2 is larger than 50k[ . Otherwise, output voltage probably can not be pulled down to 0V on disable mode.
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Any changing of specification will not be informed individual
01-Jun-2002 Rev. A
Page 7 of 7

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