(S-1111 / S-1121) HIGH RIPPLE-REJECTION LOW DROPOUT
Description
Rev.
4.
1_00
HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
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S-1111/1121 Series
The S-1111/1121 Series is a positive voltage regulator with a low dropout voltage, high output voltage accuracy, and low current consumption developed based on CMOS technology.
A built-in low on-resistance transistor provides a low dropout voltage and large output current, and a built-in overcurrent protector prevents the load current from exceeding the current capacitance of the output transistor.
An ON/OFF circuit ensures a long battery life, and a small SOT-23-5 package realize high-density mounting.
The lineup includes the S-1111 and S-1121 Series, which differ in pin configuration.
Features
• Output voltage: • High-accuracy output voltage: • Low dropout voltage: • Low current consumption: • High peak current capability: • Built-in ON/OFF circuit: • High ripple rejection: • Built-in overcurrent protector: • Small package: • Lead-free products 1.
5 V to 5.
5 V, selectable in 0.
1 V steps.
±1.
0% 200 mV typ.
(3.
0 V output product, IOUT = 100 mA) During operation: 35 μA typ.
, 65 μA max.
During shutdown: 0.
1 μA typ.
, 1.
0 μA max.
150 mA output is possible (at VIN ≥ VOUT(S) + 1.
0 V)*1 Ensures long battery life.
70 dB typ.
(at 1.
0 kHz) Overcurrent of output transistor can be restricted.
SOT-23-5
*1.
Attention should be paid to the power dissipation of the package when the output current is large.
Applications
• Power supply for battery-powered devices • Power supply for personal communication devices • Power supply for home electric/electronic appliances • Power supply for cellular phones
Package
Package Name SOT-23-5 Package MP005-A Drawing Code Tape MP005-A Reel MP005-A
Seiko Instruments Inc.
1
HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.
4.
1_00 S-1111/1121 Series Block Diagram
*1
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datasheet4u.
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VIN
VOUT
Overcurrent protector
ON/OFF
ON/OFF circuit
+ −
Reference voltage circuit
VSS
*1.
Parasitic diode
Figure 1
2
Sei...
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