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

1

2

3

4

5

6

7

8

9

10

# Ordering Information

XC9509

123456

The input for the voltage regulator block comes from VDD.

Control Methods, the MODE pin, 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 :

MSOP-10

USP-10

Device Orientation :

Embossed Tape : Standard Feed

Embossed Tape : Reverse Feed

% Control Methods, MODE Pins, and VD SENSE Pins

* The XC9509A to F series' MODE pin switches either the regulator block or DC/DC block to stand-by mode.

When the CE mode is off, every function except for the VD function enters into stand-by mode.

(The MODE pin does not operate independently.)

PWM Control

PFM/PWM Auto Switch

PWM Control

VDD

DCOUT

VROUT

DC/DC : OFF

DC/DC : ON

VDD

DCOUT

VROUT

VDD

DCOUT

VROUT

H

K

PWM, PFM/PWM Manual Switch

XC9509 Series

VD SENSE

VR : OFF

VR : ON

SERIES

XC9509

A

1

L

B

C

D

E

F

PIN

NUMBER

FUNCTION

PIN NAME

Power Ground

PGND

VROUT

A

D

VR Output

Switch

LX

DCOUT

DC/DC Output

MODE

CE

PVDD

VDOUT

AVDD

AGND

Mode Switch

Chip Enable

Power Supply 1

VD Input

Power Supply 2

Analog Ground

1

23

DESIGNATOR

DESCRIPTION

SYMBOL

R

L

6

5

4

3

6

C

DC/DC CONTROL METHODS

MODE PINS (H LEVEL)

MODE PINS (L LEVEL)

Semiconductor Ltd.

PGND 1

CE 2

PVDD 3

AVDD4

VDOUT5

10 LX

9 DCOUT

8 VROUT

7 MODE

6 AGND

MSOP-10(TOP VIEW)

USP-10(TOP VIEW)

PGND1

CE 2

PVDD3

AVDD4

VDOUT5

10 LX

9 DCOUT

8 VROUT

7 MODE

6 AGND

Data Sheet

2