Datasheet > BD9540EFV_09

BD9540EFV_09

更新时间： 2022-12-19 03:01:03

品牌	Logo	应用领域
罗姆 - ROHM		稳压器开关电脑 PC
页数	文件大小	规格书
18页	483K
描述
2ch Switching Regulators for Desktop PC

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BD9540EFV_09 数据手册

Hi-performance Regulator IC Series for PCs

2ch Switching Regulators

for Desktop PC

BD9540EFV

No.09030EBT07

●Description

BD9540EFV is a 2ch switching regulator synchronous controller that can generate low output voltages (0.75V to 5.5V). High

efficiency for the switching regulator can be achieved due to its external N-MOSFET power transistor. The IC also

incorporates a new technology called H³Reg^TM, a Rohm proprietary control method which facilitates ultra-high transient

response against changes in load. For protection and ease of use, the IC also incorporates soft start, and short circuit

protection with timer latch functions. This switching regulator is designed for DRAM and power supplies for graphics chips.

●Features

1) 2ch H³Reg^TMDC/DC converter synchronous controller

2) Thermal Shut Down (TSD), Under-Voltage Lock-Out (UVLO),

Adjustable Over Current Protection (OCP) : detected Low side FET Ron, Over Voltage Protection (OVP),

Short Circuit Protection (SCP) built-in

3) Soft start function to minimize rush current during startup

4) HTSSOP-B28 package

5) Built-in 5V power supply for FET driver

6) Integrated bootstrap diode

●Applications

LCD-TV, Game Consoles, Desktop PCs

●Maximum Absolute Ratings (Ta=25℃)

Parameter

Symbol

Limit

24^*1

Unit

Input Voltage

VIN

BOOT1,BOOT2

BOOT1-SW1, BOOT2-SW2

HG1-SW1, HG2-SW2

LG1, LG2

VOUT1, VOUT2

FB1, FB2

BOOT Voltage

30^*1

BOOT-SW Voltage

HG-SW Voltage

7^*1

LG Voltage

5VReg

7^*1

Output Voltage

Output Feedback Voltage

5VReg Voltage

5VReg

7^*1

5VReg

Current Limit Setting Voltage

Logic Input Voltage 1

Logic Input Voltage 2

Power dissipation 1

Power dissipation 2

Power dissipation 3

Power dissipation 4

Operating Temperature Range

Storage Temperature Range

ILIM1, ILIM2

EN1, EN2

CTL1, CTL2

Pd1

5VReg

24^*1

7^*1

1.45^*2

1.85^*3

3.30^*4

4.70^*5

-20～+100

-55～+150

+150

℃

Pd2

Pd3

Pd4

Topr

Tstg

Junction Temperature

Tjmax

*1 Not to exceed Pd.

*2 Reduced by 11.6mW for each increase in Ta of 1℃ over 25℃

(when mounted on a board 70.0mm×70mm×1.6mm Glass-epoxy PCB, 1layer, no copper foil area.)

*3 Reduced by 14.8mW for increase in Ta of 1℃ over 25℃.

(when mounted on a board 70.0mm×70mm×1.6mm Glass-epoxy PCB, 2layers, copper foil area : 15mm×15mm.)

*4 Reduced by 26.4mW for increase in Ta of 1℃ over 25℃.

(when mounted on a board 70.0mm×70mm×1.6mm Glass-epoxy PCB, 2layers, copper foil area : 70mm×70mm.)

*5 Reduced by 37.6mW for increase in Ta of 1℃ over 25℃.

(when mounted on a board 70.0mm×70mm×1.6mm Glass-epoxy PCB, 4layers, copper foil area : 70mm×70mm.)

www.rohm.com

2009.04 - Rev.B

1/17

12 3 4 5 6 7...18

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