LR9211L-18-AF5-R datasheet(2/6 Pages) UTC

2 / 6 page

LR9211

Preliminary

CMOS IC

UNISONICTECHNOLOGIESCO.,LTD

2 of 6

www.unisonic.com.tw

QW-R102-103.a



MARKING

PACKAGE

VOLTAGE CODE

MARKING

SOT-25

18: 1.8V

AD: ADJ



PIN CONFIGURATION

GND

VIN

VOUT

NC/FB



PIN DESCRIPTION

PIN NO.

PIN NAME

DESCRIPTION

VIN

Input Voltage. This pin connects to the source of the internal pass transistor that

supplies current to the output pin. Bypass VIN to GND with a minimum 1uF ceramic

capacitor. Place the decoupling capacitor physically as close as possible to the

device.

GND

Ground.

Enable Input. Pulling this pin below 0.35V turns the regulator off, reducing the

quiescent current to a fraction of its operating value. This pin is not available for 3-pin

packages.

FB/NC

Feedback Pin(ADJ Version). this pin is connected to an external resistor divider, turns

to adjustable output voltage; VOUT=0.8*(R1+R2)/R1(V); NC Pin(fixed version);

VOUT

Output Voltage. This pin is power output of the device. A pull low resistance exists

when the device is disabled by pulling low the EN pin. To maintain adequate transient

response to large load change, a minimum 1uF ceramic capacitor is required to

reduce the effects of current transients on VOUT.

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