LTC1504CS8-3.3 datasheet(5/12 Pages) LINER

tên linh kiện	LTC1504CS8-3.3

Giải thích chi tiết về linh kiện	500mA Low Voltage Step-Down Synchronous Switching Regulator

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LTC1504

PIN FUNCTIONS

during power-up. CSS also compensates the current limit

loop, allowing the LTC1504 to enter and exit current limit

cleanly. See the Applications Information section for more

details.

COMP (Pin 8): External Compensation. An external RC

network should be connected to COMP to compensate the

feedback loop. COMP is connected to the output of the

internal error amplifier.

TEST CIRCUITS

IMAX

SHDN

COMP

VCC

GND

FB/SENSE

CIN

VCC

0.01

µF

COUT

VOUT

LEXT

CIN: AVX TPSE107M016R0125

COUT: SANYO 16CV220GX

LEXT: COILCRAFT D03316-473

1504 • TC01

LTC1504

µF

0.1

µF

220pF

7.5k

Figure 1

–

VREF

LTC1504

COMP

FB/SENSE

A: TEST VOL, IOL

B: TEST VOH, IOH

1504 • TC02

Figure 2

BLOCK DIAGRAM

Figure 3. Block Diagram

–

+–

MIN

+–

MAX

+–

–+

ILIM

–

40mV

1.265V

12V

PWM

12.6k

20.4k

(ADJ ONLY)

SENSE

(–3.3V ONLY)

SAW

IMAX

COMP

SHDN

1504 • BD

– 40mV

VREF

VCC

TO INTERNAL BLOCKS

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