LTC3778 Ver la hoja de datos (PDF) - Linear Technology

Número de pieza

componentes Descripción

Lista de partido

LTC3778

Wide Operating Range, No RSENSE™ Step-Down Controller

Linear Technology 

LTC3778

W

FU CTIO AL DIAGRA

VOUT

2 VON

0.7V 2.4V

RON

8 ION

6 FCB

1µA

10 EXTVCC

4.7V

+–

tON

=

VVON

IION

(10pF)

R

SQ

0.6V

–+

F

20k

+

ICMP

IREV

–

1.4V

VRNG

4

0.7V

×

(0.5~2)

3.3µA

FCNT

ON

SWITCH

LOGIC

SHDN

OV

VIN

11 VIN

+

CIN

0.6V

REF

5V

REG

BOOST

20

TG

19

SW

18

SENSE+

17

SENSE–

16

DRVCC

13

BG

14

INTVCC

12

CB

DB

M1

L1

+

COUT

M2

VOUT

CVCC

PGND

15

3

PGOOD

RSENSE

(OPTIONAL)*

R2

1

240k

ITHB

1V

Q2 Q4

Q6

Q3 Q1

+– 0.8V

×5.3

EA

0.6V

Q5

SS

–+

0.6V

5 ITH RC CC1

0.54V

UV

RUN

SHDN/

LATCH-OFF

OV

0.66V

1.2µA

6V

0.4V

1 RUN/SS CSS

VFB

9

R1

SGND

7

SW

SENSE+

BG

M2

SENSE–

PGND

*CONNECTION W/O

SENSE RESISTOR

1778 FD

3778f

8

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