BD8312HFN datasheet(5/15 Pages) ROHM

Part #	BD8312HFN

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

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Manufacturer	ROHM [Rohm]

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5 / 15 page

BD8312HFN

Technical Note

5/14

www.rohm.com

2010.06- Rev.C



Reference data

（

Unless otherwise specified, Ta = 25℃, VCC = 7.4 V）

0.98

0.99

1.00

1.01

1.02

-40

-20

0

20

40

60

80

100

120

TEMPERATURE [℃]

4.7

4.8

4.9

5.0

5.1

5.2

5.3

-40

0

40

80

120

TEMPERATURE [℃]

1.3

1.4

1.5

1.6

1.7

-40

0

40

80

120

TEMPERATURE [℃]

Fig.3. INV

threshold temperature property

Fig.7. fosc

temperature property

Fig.5. VREG output

temperature property

Fig.10. Nch FET ON resistance

temperature property

100

200

300

400

500

-40

0

40

80

120

TEMPARATURE [℃]

Fig.9. UVLO

threshold temperature property

0.98

0.99

1.00

1.01

1.02

02

468

10

12

14

VCC [V]

Fig.4. INV

threshold power supply property

0

1

2

3

4

5

6

7

8

02

46

8

10

12

14

VCC [V]

Fig.6. VREG

output power supply property

Fig.8. fosc

voltage property

Fig.11. Nch FET ON resistance

power supply property

ID=500mA

1.3

1.4

1.5

1.6

1.7

36

9

12

15

VCC [V]

0

100

200

300

400

500

600

3

6

9

12

15

VCC [V]

ID=500mA

2.50

2.70

2.90

3.10

3.30

3.50

-40

0

40

80

120

環境温度 Ta [℃]

0.00

0.05

0.10

0.15

0.20

0.25

UVLO detection voltage

Hysteresis width

UVLO release voltage

Environmental temperature Ta [

°C]

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