LT1941EFE Ver la hoja de datos (PDF) - Linear Technology

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componentes Descripción

Fabricante

LT1941EFE

Triple Monolithic Switching Regulator

Linear Technology 

BLOCK DIAGRAM

LT1941

BIAS1

2μA

RUN/SS1

RUN/SS2

2μA

VIN

INT REG

AND REF

VIN

+

MASTER

OSC

CLK1

CLK2

CLK3

4.5V –

+

10.8V –

5GOOD

12GOOD

RUN/SS3

2μA

0.9V

¤

+

SLOPE

–

SLAVE

C1

CLK

OSC

R

SQ

VC

CF

RC

CC

PGOOD

0.35V

RUN/SS

–

ILIMIT

+CLAMP

1.7V

VIN

VIN

CIN

ERROR

AMP

BOOST

D2

0.628V

54mV

C3

SW

L1

OUT

D1

C1

FB

R1

R2

GND

VC3

RUN/SS

FB3

VOUT3

FOR

POSITIVE

OUTPUTS

R3

(EXTERNAL)

FB3

NFB

R4

(EXTERNAL)

FB3

R3

FOR (EXTERNAL)

NEGATIVE

OUTPUTS

NFB

R4

(EXTERNAL)

–VOUT3

NFB –

+

1.25V

+

ERROR

– AMP

+

0.4V

–

+

–

0.6V

+

–

1.12V

C2

–

+

3

RSQ

RAMP

GENERATOR

SLAVE

OSCILLATOR

CLK3

DRIVER

BIAS2

SW3

Q1

VIN

BOOST

L3

D3

SW3

VOUT3

C4

0.01Ω

PGND

VIN

INVERTING

L4A

L4B

SW3

C5

D4

–VOUT3

C6

PGOOD3

1941 F02

Figure 2. Block Diagram of the LT1941 with Associated External Components

1941fb

9

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