ISL8011 Ver la hoja de datos (PDF) - Intersil

Número de pieza

componentes Descripción

Lista de partido

ISL8011

1.2A Integrated FETs, High Efficiency Synchronous Buck Regulator

Intersil 

Typical Applications

ISL8011

VIN

2.7V TO 5.5V

C1

10µF

R1

100kΩ

ISL8011

PVIN

PHASE

VCC

C3

0.1µF

EN

PGND

SGND

FB

L

1.8µH

C2

10µF

VOUT

1.3V, 1.2V

R2

61.9kΩ

R3

100kΩ

POR

GND

FIGURE 10. TYPICAL APPLICATION FOR ADJUSTABLE VERSION

Block Diagram

VCC

SOFT-START

SHUTDOWN

-

EA

EN

BANDGAP

+

0.8V

30pF

SHUTDOWN

50Ω

270kΩ

OSCILLATOR

+

COMP

-

PWM CONTROL

AND DRIVERS

+

PVIN

PHASE

PGND

FB

POR

SLOPE

COMPENSATION

-

0.864V

+

+

0.736V

-

+

OCP

-

+

CSA1

-

0.85V

+

ZC

CSA2

-

200ms

DELAY

0.2V

-

SCP

+

SGND

GND

FIGURE 11. FUNCTIONAL BLOCK DIAGRAM

6

FN9254.2

August 4, 2009

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