Synchronous Step-Down DC/DC Converter with Built-In LDO Regulator In Series plus Voltage Detector

Preliminary

$ SOP-8

* Diodes shown in the above circuits are protective diodes.

Ta=25

(*1) IOUT = Pd / (VIN - VOUT) when PC board mounting.

(*2) Package power dissipation

650

Pd

Topr

- 40 ~ + 85

VDD Pin Voltage

DCOUT Pin Voltage

VROUT Pin Voltage

VDOUT

- 0.3 ~ VDD + 0.3

VDOUT Pin Voltage

XC9510 Series

PARAMETER

Storage Temperature Range

LX Pin Voltage

Continuous Power Dissipation (*1)

Operating Temperature Range

CE/MODE Pin Voltage

SOP-8

V

Tstg

mW

- 0.3 ~ VDD + 0.3

V

- 55 ~ + 125

SYMBOL

RATINGS

UNITS

AVDD

- 0.3 ~ 6.5

V

V

- 0.3 ~ VDD + 0.3

V

VROUT

- 0.3 ~ VDD + 0.3

V

DCOUT

LX

CE/MODE

- 0.3 ~ VDD + 0.3

Semiconductor Ltd.

+

-

Vref with

soft start

PWM/PFM

Controller

Phase

Compensation

+

-

logic

Buffer,

Driver

Current Limit &

Feedback

Ra mp Wave

Generator,

OSC

DCOUT

VDD

-

+

U.V.L.O.

LX

VROUT

AGND

+

-

Current

Li mi t

Vref

PGND

CE/MODE

ON/OFF&

MODE

CONTROL

ea c h

circuit

+

-

VDOUT

Vref

SENSE

(VDD or DCOUT or VROUT)

Data Sheet

3