BD9122GUL_09 データシートの表示（PDF） - ROHM Semiconductor

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BD9122GUL_09

Output 0.5A or Less High Efficiency Step-down Switching Regulator with Built-in Power MOSFET

ROHM Semiconductor 

Single-chip Type with built-in FET Switching Regulator Series

Output 0.5A or Less High Efficiency

Step-down Switching Regulator

with Built-in Power MOSFET

BD9122GUL

No.09027EAT31

●Description

ROHM’s high efficiency step-down switching regulator (BD9122GUL) is a power supply designed to produce a low voltage

including 1 volts from 5/3.3 volts power supply line. Offers high efficiency with our original pulse skip control technology and

synchronous rectifier. Employs a current mode control system to provide faster transient response to sudden change in load.

●Features

1) Offers fast transient response with current mode PWM control system.

2) Offers highly efficiency for all load range with synchronous rectifier (Nch/Pch FET) and SLLMTM (Simple Light Load Mode)

3) Incorporates soft-start function.

4) Incorporates thermal protection and ULVO functions.

5) Incorporates short-current protection circuit with time delay function.

6) Incorporates shutdown function

7) Employs WL-CSP : VCSP50L2

●Use

Power supply for LSI including DSP, Micro computer and ASIC

●Absolute Maximum Ratings (Ta=25℃)

Parameter

Symbol

Limits

Unit

VCC Voltage

PVCC Voltage

VCC

PVCC

-0.3～+7 ＊1

V

-0.3～+7 ＊1

V

EN Voltage

VEN

-0.3～+7

V

SW,ITH Voltage

Power Dissipation

VSW,VITH

-0.3～+7

V

Pd

660＊2

mW

Operating temperature range

Topr

-25～+85

℃

Storage temperature range

Tstg

-55～+150

℃

Maximum junction temperature

Tjmax

+150

℃

＊1 Pd should not be exceeded.

＊2 Derating in done 5.28mW/℃ for temperatures above Ta=25℃, Mounted on 50mm×58mm×1.6mm Glass Epoxy PCB.

●Operating Conditions (Ta=25℃)

Parameter

Symbol

VCC Voltage

PVCC Voltage

VCC *3

PVCC *3

EN Voltage

SW average output

EN

Isw *3

Output voltage Setting Range

VOUT

＊3 Pd should not be exceeded.

＊4 In case set output voltage 1.8V or more, VccMin = 2.7V.

Min.

Limits

Typ.

Max.

Unit

2.5*4

3.3

5.5

V

2.5*4

3.3

5.5

V

0

-

VCC

V

-

-

0.3

A

1.0

-

2.0

V

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© 2009 ROHM Co., Ltd. All rights reserved.

1/13

2009.05 - Rev.A

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