LTC4002 datasheet(8/24 Pages) LINER

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LTC3783

3783f

PI FU CTIO S

ITH(Pin15):ErrorAmplifierOutput/CompensationPin.The

current comparator input threshold increases with this

control voltage, which is the output of the gm type error

amplifier. Nominal voltage range for this pin is 0V to 1.40V.

RUN (Pin 16): The RUN pin provides the user with an

accurate means for sensing the input voltage and pro-

gramming the start-up threshold for the converter. The

falling RUN pin threshold is nominally 1.248V and the

comparator has 100mV hysteresis for noise immunity.

When the RUN pin is grounded, the IC is shut down and the

VIN supply current is kept to a low value (20µA typ).

Exposed Pad (Pin 17): Ground Pin. Solder to PCB ground

for electrical contact and rated thermal performance.

BLOCK DIAGRA

OSC

V-TO-I

LDO

BIAS AND

START-UP

–

LOGIC

VREF

BIAS

SLOPE

COMP

TEMP

SENSOR

(165

°C)

SS_RESET

0.615V

FREQ

GATE

SENSE

PWMOUT

VIN

RUN

3738 BD

ITRIP

GND

VREF

CLK

SLEEP

OV/FB

VREF

1 S

SYNC

ILIM

FBP

FBN

OV/FB

–

µA

0.2V

–

IMAX

0.15V

–

VREF

–

1.9V

IVMODE

VREF

–

ITH

PWMIN

2.23V

VREF

–

INTVCC

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