LP2981-28DBVR datasheet(3/17 Pages) TI1

Part #	LP2981-28DBVR

Description	100-mA ULTRA-LOW DROPOUT REGULATOR WITH SHUTDOWN

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Manufacturer	TI1 [Texas Instruments]

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VIN

VOUT

GND

ON/OFF

Overcurrent/

Overtemperature

Protection

VREF

1.23 V

−

+

R1

R2

VOUT

3.3

µF

(see Note A)

1

µF

(see Note A)

VIN

1

ON/OFF

(see Note B)

2

GND

3

5

4

NC

(see Note C)

LP2981

www.ti.com ......................................................................................................................................................... SLVS521F – JULY 2004 – REVISED AUGUST 2008

FUNCTIONAL BLOCK DIAGRAM

BASIC APPLICATION CIRCUIT

A.

Minimum COUT value for stability (can be increased without limit for improved stability and transient response)

B.

ON/OFF must be actively terminated. Connect to VIN if shutdown feature is not used.

C.

Pin 4 (NC) must be left open. Do not connect anything to this pin.

Figure 1.

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