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

Preliminary

1

2

3

4

5

6

7

8

" Ordering Information

XC9510

123456

The input for the voltage regulator block comes from the DC/DC.

Control Methods and MODE pins, the VD Sense pin (See the chart below)

Setting voltage and specifications of each DC/DC, VR, and VD (Based on the internal standard)

Oscillation Frequency of DC/DC :

300kHz

600kHz

1.2MHz

Package Type :

SOP-8

Device Orientation :

Embossed Tape : Standard feed

Embossed Tape : Reverse feed

$ Control Methods, CE/MODE Pin, VDSENSE

SOP-8 (Top View)

C

CE/MODE PINS

(L LEVEL)

VD

SENSE

K

D

E

F

H

A

VR : OFF

DC/DC CONTROL

METHODS

5

4

3

6

C

CE/MODE PINS

(H LEVEL)

L

PWM, PFM/PWM

Manual Switch

SERIES

1

23

1

B

R

L

6

XC9510

PWM Control

S

DESIGNATOR

DESCRIPTION

SYMBOL

Chip Enable / MODE Switch

Power Supply

VD Output

Analog Ground

CE/MODE

VDD

VDOUT

AGND

Switch

LX

DCOUT

DC/DC Output

VROUT

VR Output

PIN

NUMBER

FUNCTION

PIN NAME

Power Ground

PGND

XC9510 Series

VROUT

PFM/PWM

Automatic Switch

-

VR : ON

PWM Control

-

CE/MODE PINS

(M LEVEL)

Stand-by Mode

(Except for VD)

VDD

DCOUT

VROUT

VDD

DCOUT

VROUT

VDD

DCOUT

Semiconductor Ltd.

PGND 1

CE/MODE 2

VDD 3

VDOUT 4

8 LX

7 DCOUT

6 VROUT

5 AGND

Data Sheet

2