R1121N401B RICOH Co.,Ltd., R1121N401B Datasheet

R1121N401B

Manufacturer Part Number

R1121N401B

Description

Manufacturer

RICOH Co.,Ltd.

Datasheets

1.R1121N181A.pdf (16 pages)

2.R1121N181B.pdf (16 pages)

Specifications of R1121N401B

Date_code

03+

Packing_info

SOT-153

Current page: 1 of 16
Download datasheet (136Kb)

Rev.1.11

The R1121N Series are voltage regulator ICs with high output voltage accuracy, extremely low supply current, low ON-

resistance and high ripple rejection by CMOS process. Each of these voltage regulator ICs consists of a voltage reference

unit, an error amplifier, resistors, 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 R1121N 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 fixed with high accuracy.

Since the package for these ICs are SOT-23-5 (Mini-mold) package, high density mounting of the ICs on boards is possible.

OUTLINE

FEATURES

APPLICATIONS

BLOCK DIAGRAM

Ultra-Low Supply Current.................................................TYP. 35 A

Standby Mode ...................................................................TYP. 0.1 A

Low Dropout Voltage ........................................................TYP. 0.2V (I

High Ripple Rejection .......................................................TYP. 70db (f = 1kHz)

Low Temperature-Drift Coefficient of Output Voltage .....TYP. 100ppm/ C

Excellent Line Regulation .................................................TYP. 0.05%/V

High Accuracy Output Voltage.......................................... 2.0%

Small Package ..................................................................SOT-23-5 (Mini-mold)

Output Voltage ..................................................................Stepwise setting with a step of 0.1V in the range of 1.5V to 5.0V

Built-in chip enable circuit (2 Types; A: active “L”, B: active “H”)

Pinout ................................................................................Similar to the TK112, TK111

Power source for cellular phones such as GSM, CDMA and various kind of PCSs.

Power source for domestic appliances such as cameras, VCRs and camcorders.

Power source for battery-powered equipment.

Vref

R1121NXX1A

Current Limit

GND

OUT

- 1 -

is possible.

LOW NOISE 150mA LDO REGULATOR

R1121N SERIES

OUT

= 100mA)

Vref

R1121NXX1B

Current Limit

’99.7.13

GND

OUT

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