'99.7.22

LOW NOISE 150mA LDO REGULATOR

R1111N SERIES

Rev.1.11

- 1 -

The R1111N 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 R1111N 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.

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

Standby Mode ...........................................................TYP. 0.1µA

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 Output Voltage Accuracy..................................±2.0%

Excellent Line Transient Response and Load Transient Response

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 is

possible

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

Pinout ........................................................................Similar to the LP2980

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

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

Power source for battery-powered equipment.

R1111NXX1A

R1111NXX1B

Vref

Current Limit

15

2

3

GND

CE

Vref

Current Limit

15

2

3

GND

CE