LTC1503IS8-1.8 View Datasheet(PDF) - Linear Technology

Part Name

Description

MFG CO.

LTC1503IS8-1.8

High Efficiency Inductorless Step-Down DC/DC Converters

Linear Technology 

LTC1503-1.8/LTC1503-2

PI FU CTIO S

turn-on (see Applications Information). If neither of the

two functions are desired, the pin may be floated or tied

to VIN.

C2+ (Pin 6): Flying Capacitor Two Positive Terminal.

GND (Pin 7): Ground. Connect to a ground plane for best

performance.

C2 – (Pin 8): Flying Capacitor Two Negative Terminal.

BLOCK DIAGRA

VIN

CIN

680k

+

330k

–

+

990k

–

VIN

2µA

SHDN/SS

+

+–

350mV

MODE

CONTROL

VOUT

SHORT CIRCUIT

MODE SKIP

COMP2

STEP-DOWN

CHARGE

PUMP

C1+

C1–

C2 +

C2 –

VOUT

COUT

+

150mV

800k

+ 10mV

600kHz

OSCILLATOR

–

350mV

+

SHDN

REG ENABLE

COMP1

SOFT-START

VREF RAMP

1.2V

VREF

1.2M

GND

LTC1503-2

1503-1.8/2 BD

5

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