LTC1778 View Datasheet(PDF) - Linear Technology

Part Name

Description

MFG CO.

LTC1778

Wide Operating Range, No RSENSE™ Step-Down Controller

Linear Technology 

LTC1778/LTC1778-1

TYPICAL APPLICATIO S

Positive-to-Negative Converter, –5V/5A at 300kHz

CSS

0.1µF

LTC1778-1

1

16

RUN/SS BOOST

CC1

4700pF

RC

10k

CC2

100pF

2

VON

3

VRNG

4

FCB

5

ITH

6

SGND

R1

10k

R2

52.3k

7

ION

8

VFB

RON

698k

15

TG

14

SW

13

PGND

12

BG

11

INTVCC

10

VIN

9

EXTVCC

DB

CMDSH-3

CB

0.22µF

CVCC

4.7µF

RF

1Ω

CF

0.1µF

CIN1: TAIYO YUDEN TMK432BJ106MM

CIN2: SANYO 35CV10GX

COUT: PANASONIC EEFUD0J101R

L1: PANASONIC ETQPAF2R7H

M1

IRF7811A

CIN1

10µF

25V

×2

VIN IOUT

20V 8A

10V 6.7A

5V 5A

CIN2

10µF

35V

VIN

5V TO 20V

L1 2.7µH

M2

IRF7822

+ COUT

D1

100µF

B340A

6V

×3

VOUT

–5V

1778 TA06

1778fb

22

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