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S5U2187
750mA CMOS
Elektronische Bauelemente
RoHS Compliant Product
Positive Voltage Regulator
Description
The S5U2187 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 S5U2187 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 * Noise Reduction Bypass Capacitor * Short Circuit Current Fold-back * Guaranteed 750mA output * Current Limiting * Power-Saving Shutdown Mode
A b L4 c L1 E
Millimeter REF. Min. Max. 4.40 4.80 c2 0.66 0.91 L2 0.00 0.30 0.36 0.5 D e B 2.29 2.79 L 9.80 10.4
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
S5U2187
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Any changing of specification will not be informed individual
01-Jun-2002 Rev. A
Page 1 of 7
S5U2187
Elektronische Bauelemente
750mA CMOS Positive Voltage Regulator
Absolute Maximum Ratings
Parameter
Input Voltage Output Current Output Voltage Operating Ambient Temperature Junction Temperature Max. Junction Temperature Power Dissipation ( EDS Classification
Symbol
VIN IOUT VOUT Topr Tj Tj Max. PD
Ratings
8
PD/(VIN-VO) Gnd-0.3~VIN+0.3 -40~+85 -40~+125 150 3.0
Unit
V mA
o o
V
C C
T=100 C)
o
C W
o
B
Electrical Characteristics TA=25
Parameter Output Voltage Output Current Current Limit Short Circuit Current Load Regulation Dropout Voltage Quiescent Current Ground Pin Current Line Regulation Input Voltage
Over Temperature Shutdown Over Temperature Hysterisis
unless otherwise noted
Condition
IO=1mA, VIN=VOUT(T)+2V VO>1.2V VO>1.2V VIN=VOUT(T)+1V, VO < 0.4V VIN=VOUT(T)+2V, IO=1mA to 750mA IO=750mA VO=VOUT(E)-2% VOUT(T)=1.5V VOUT(T)=1.8V VOUT(T) 2.0V
(VIN=VOUT (T) + 2V, VEN=VIN, CIN=1uF, COUT=4.7uF)
Symbol VOUT(E)
(Note1)
Min
-1.5 750 750 -1 -0.15 -0.1 -0.4 Note3 -
TYP
VOUT(T)
(Note2)
Max
1.5 1 1000 650 500 70 0.15 0.1 0.4 7 70 1.26 VIN 0.4 1 1 2
Unit
% mA mA mA % mV A A % V : : ppm/ : A A V dB Vrms V V A A A
IO ILIM ISC REGLOAD VDROPOUT IQ IGND REGLINE VIN OTS OTH TC IADJ ILoad VREF PSRR eN VEH VEL IEH IEL ISD
750 0.2 45 45 0.02 150 30 30 1 1.240 75 55 30 30 0.5
VIN=VOUT(T)+2V, IO=0mA VIN=VOUT(T)+2V, IO=1mA to 750mA IO=1mA (T)+1 to VIN=VOUT VOUT(T)+2 VOUT(T)<2.0V 2.0V VOUT(T)<4.0V 4.0V VOUT(T)
Output Voltage Temperature Coefficient ADJ Input Bias Current Minimum Load Current ADJ Reference Voltage Power Supply Rejection Output Voltage Noise EN Input Threshold EN Input Bias Current Shutdown Supply Current
VIN=2.5V Io=100mA Co=4.7 F (ceramic) f=1kHz f=10kHz f=100kHz
1.221 2.0 0 -
f=10Hz~100kHz, Io=10mA, Co=4.7 F 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=5V, VO=0V, 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
S5U2187
Elektronische Bauelemente
750mA CMOS Positive Voltage Regulator
Ordering Information(contd.)
Part Number
S5 U2187-AD
Marking
7HAD2 XXXX
Output Voltage
Adjustable
Part Number
Marking
Output Voltage
The S5U2187 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 : . The S5U2187 behaves like a current source when the load reaches 2.2A. However, if the load impedance drops below 0.3ohms, the current drops back to 600mA to prevent excessive power dissipation. Normal operation is restored when the load resistance exceeds 0.75ohms. The S5U2187 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 10uF 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.
Detailed Description
External Capacitors
Enable
When EN pin is pulled low, the PMOS pass transistor shuts off, and all internal circuits are powered down. In this state, the quiescent current is less than 2 A. This pin behaves much like an electronic switch. 100K resistor is necessary between VEN source and EN pin when VEN is high than VIN.
(Note: There is no internal pull-up for EN pin. It can not be floating.)
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 1.24V 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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Any changing of specification will not be informed individual
01-Jun-2002 Rev. A
Page 3 of 7
S5U2187
Elektronische Bauelemente
750mA CMOS Positive 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
S5U2187
Elektronische Bauelemente
750mA CMOS Positive Voltage Regulator
http://www.SeCoSGmbH.com/
Any changing of specification will not be informed individual
01-Jun-2002 Rev. A
Page 5 of 7
S5U2187
Elektronische Bauelemente
750mA CMOS Positive 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
S5U2187
Elektronische Bauelemente
750mA CMOS Positive 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
20.67 11.27 7.75 5.90 4.77 4.00 3.44 3.02 2.7 2.43 2.21 2.03 1.88 1.75 1.63 1.53 1.44 1.36 1.29 1.23 1.17 1.12 1.07 1.02 0.98 0.95 0.91 0.88 0.85 0.82 0.79 0.77 0.75 0.73 0.70 0.69 0.67 0.65
2
41.33 22.55 15.50 11.81 9.54 8.00 6.89 6.05 5.39 4.86 4.43 4.07 3.76 3.49 3.26 3.06 2.88 2.73 2.58 2.46 2.34 2.23 2.14 2.05 1.97 1.89 1.82 1.76 1.70 1.64 1.59 1.54 1.49 1.45 1.41 1.37 1.33 1.30
5
103.33 56.36 38.75 29.52 23.85 20.00 17.22 15.12 13.48 12.16 11.07 10.16 9.39 8.73 8.16 7.65 7.21 6.81 6.46 6.14 5.85 5.59 5.34 5.12 4.92 4.73 4.56 4.40 4.25 4.11 3.97 3.85 3.73 3.63 3.52 3.43 3.33 3.25
10
206.67 112.73 77.50 59.05 47.69 40.00 34.44 30.24 26.96 24.31 22.14 20.33 18.79 17.46 16.32 15.31 14.42 13.63 12.92 12.28 11.70 11.17 10.69 10.25 9.84 9.47 9.12 8.79 8.49 8.21 7.95 7.70 7.47 7.25 7.05 6.85 6.67 6.49
20
413.33 225.45 155.00 118.10 95.38 80.00 68.89 60.49 53.91 48.63 44.29 40.66 37.58 34.93 32.63 30.62 28.84 27.25 25.83 24.55 23.40 23.34 21.38 20.50 19.68 18.93 18.24 17.59 16.99 16.42 15.90 15.40 14.94 14.50 14.09 13.70 13.33 12.98
R2(k[ )=(1.24*R1(k [))/(VOUT-1.24)
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 0.57 0.56 0.55 0.54 0.53 0.51 0.50 0.49 0.48 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 0.37 0.37 0.36 0.36 0.35 0.35 0.34 0.34 0.33 0.33
2
1.27 1.23 1.20 1.18 1.15 1.12 1.10 1.07 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 0.82 0.81 0.80 0.78 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
3.16 3.08 3.01 2.94 2.87 2.81 2.74 2.68 2.63 2.57 2.52 2.47 2.42 2.38 2.33 2.29 2.25 2.21 2.17 2.13 2.09 2.06 2.03 1.99 1.96 1.93 1.90 1.87 1.85 1.82 1.79 1.77 1.74 1.72 1.69 1.67 1.65
10
6.33 6.17 6.02 5.88 5.74 5.61 5.49 5.37 5.25 5.15 5.04 4.94 4.84 4.75 4.66 4.58 4.49 4.41 4.34 4.26 4.19 4.12 4.05 3.99 3.92 3.86 3.80 3.75 3.69 3.64 3.58 3.53 3.48 3.43 3.39 3.34 3.30
20
12.65 12.34 12.04 11.75 11.48 11.22 10.97 10.74 10.51 10.29 10.08 9.88 9.69 9.50 9.32 9.15 8.99 8.83 8.67 8.52 8.38 8.24 8.10 7.97 7.85 7.73 7.61 7.49 7.38 7.27 7.17 7.07 6.97 6.87 6.78 6.68 6.60
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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