BD8314NUV(2011) Ver la hoja de datos (PDF) - ROHM Semiconductor

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Fabricante

BD8314NUV
(Rev.:2011)

High-efficiency Step-up Switching Regulator with Built-in Power MOSFET

ROHM Semiconductor 

BD8314NUV

Technical Note

●Limits of the lowest power supply voltage to start up

When using configuration of inputting VCC voltage from output voltage of DC/DC converter, the input voltage as power

supply for the IC drops by Vf voltage of external Diode.

The worst condition is shown as below.

VCC terminal voltage - Vf voltage of external diode ≧ the worst voltage of UVLO reset voltage(=2.8V)

Please judge this IC is useable or not considering needed start up voltage and load current.

3.2

VOUT=10V, typ

3.0

-35℃

2.8

2.6

2.4

85℃

25℃

2.2

0.1

1.0

10.0

Io [mA]

100.0

Fig.32 start up voltage Vs load current

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9/15

2011.08 - Rev.D

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