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2010.04 - Rev.C

© 2010 ROHM Co., Ltd. All rights reserved.

High performance Regulators for PCs

Switching Regulator Controller

for Graphic Chip Cores

BD9560MUV

●

Description

BD9560MUV is a switching regulator controller with high output current which can achieve low output voltage (0.412V ~

1.2875V) from a wide input voltage range (4.5V ~ 25V). The setting of output voltage depends on DAC built in. High

efficiency for the switching regulator can be realized by utilizing an external N-MOSFET power transistor. SLLM (Simple

Light Load Mode) technology is also integrated to improve efficiency in light load mode, providing high efficiency over a wide

load range. For protection and ease of use, the soft start function, variable frequency function, short circuit protection

function with timer latch, over voltage protection, over current protection and power good function are all built in. This

switching regulator is specially designed for GMCH.

●

Features

1) Switching Regulator Controller

2) Light Load Mode and Continuous Mode Changeable

3) Thermal Shut Down circuit built-in (TSD)

4) Under Voltage Lockout circuit built-in (UVLO)

5) Over Current Protection circuit built-in (OCP)

6) Over Voltage Protection circuit built-in (OVP)

7) Short circuit protection with timer-latch built-in

8) Power good circuit built-in

9) Soft start function to minimize rush current during startup

10) Switching Frequency Variable (f=200 KHz ~ 600 KHz)

11) VQFN032V5050 package

●

Applications

Laptop PC, Desktop PC, Digital Components

●

Maximum Absolute Ratings (Ta=25℃)

Parameter

Symbol

Ratings

Unit

Input voltage 1

VCC

7

*1*2

V

Input voltage 2

PVCC

7

*1*2

V

Input voltage 3

VIN

35

*1*2

V

BOOT voltage

BOOT

35

*1*2

V

BOOT-SW voltage

BOOT-SW

7

*1*2

V

HG-SW voltage

HG-SW

7

*1*2

V

LG voltage

LG

PVCC

V

VREF voltage

VREF

VCC

V

VRON input voltage

VRON

7

*1

V

Logic input voltage

CL/SCP/SS/TON/SLLM/VID4-0/PWRGD_C/DAC_C

VCC

V

Logic output voltage 1

PWRGD

7

V

Logic output voltage 2

SUS_OUT

VCC

V

Power dissipation1

Pd1

0.38

*3

W

Power dissipation2

Pd2

0.88

*4

W

Operating Temperature Range

Topr

-10 ~ +100

℃

Storage Temperature Range

Tstg

-55 ~ +150

℃

Junction Temperature

Tjmax

+150

℃

*1 Not to exceed Pd..

*2 Maximum voltage that can be proof against instantaneous applied voltage such as serge, back electromotive voltage or continuous pulse applied voltage

(Duty ratio : less than 10%)

*3 Reduced by 3.0mW for each increase in Ta of 1℃ over 25℃ (when don’t mounted on a heat radiation board )

*4 Reduced by 7.0mW for increase in Ta of 1℃ over 25℃. (when mounted on a board 70.0mm×70mm×1.6mm Glass-epoxy PCB.)

No.10030ECT10