BD8312HFN(2009) Ver la hoja de datos (PDF) - ROHM Semiconductor

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componentes Descripción

Fabricante

BD8312HFN
(Rev.:2009)

Output 1.5A or Less High-efficiency Step-down Switching Regulator with Built-in Power MOSFET

ROHM Semiconductor 

BD8312HFN

Example of Application Input: 4.5 to 10 V, output: 3.3 V / 500mA

Technical Note

VBAT=4.5～10V

1μF

GRM188B11A105KA61

（Murata）

1μF

GRM188B11A105KA61

（Murata）

GND

VCC

VREG

PGND

INV

STB

PVCC

Lx

ON/OFF

10pF

3.3V/500mA

10kΩ

200kΩ

4.7μH

1098AS-4R7M（TOKO）

51kΩ

10μF

GRM31CB11A106KA01

（Murata）

22kΩ

Fig.17 Reference application diagram

Reference application data 1

100

80

VCC=4.5V

60

VCC=7.5V

40

VCC=5.5V

20

0

1

10

100

1000

OUTPUT CURRENT [mA]

Fig.18 Power conversion efficiency

(VOUT = 3.3 V)

3.35

3.33

3.31

3.29

3.27

3.25

1

VCC=7.5V

VCC=5.5V

VCC=4.5V

10

100

OUTPUT CURRENT [mA]

1000

Fig.19 Load regulation

(VOUT = 3.3 V)

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

7/14

2009.04- Rev.B

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