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2011.03 - Rev.B

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Automotive Body Power Management LSI

Voltage Tracker

BD3925FP-C,BD3925HFP-C

●

Description

BD3925FP-C and BD3925HFP-C are voltage trackers for automotive use which feature high withstand-voltage to 50V.

They offer the output current loading to 500mA while limiting the quiescent current to 45µA (typ.), so that they suit to apply

for systems which are permanently connected to the car battery and requiring low-current-consumption. The offset is

±

15mV (for 5V output. 6V < Vcc < 36V, 5mA < lo < 200mA). They integrate folded–type of over-current protection to

minimize heat dissipation while accidentally shorted, thus lead to most robust power-supply design under the harsh

automotive environment.



Features

1) Ultra-low quiescent current: 45µA (TYP.)

2) Low-saturation voltage type P-channel DMOS output transistors

3) Low offset voltage:

 15mV(for 5V output, 6V< Vcc <36V, 5mA<lo<200mA)

4) Vcc power supply voltage = 50 V

5) Integrated over-current protection circuit and thermal shutdown circuit

6) TO252-5/HRP5 Package



Applications

Onboard vehicle devices (body-control, car stereos, satellite navigation systems, etc.)



Product line

Part No.

Package

BD3925FP-C

TO252-5

BD3925HFP-C

HRP5



Absolute maximum ratings (Ta=25°C)

Parameter

Symbol

Limit

Unit

Supply Voltage

Vcc

50

V

Switch Supply Voltage

50

V

VADJ Terminal Supply Voltage

28

V

Vo Terminal Voltage

Vout

28

V

Output Current

Io

500

mA

Power Dissipation

Pd

2

W

1.6 (HRP5)

Operating Temperature Range

Topr

-40 ~ +125

℃

Storage Temperature Range

Tstg

-55 ~ +150

℃

Maximum Junction Temperature

Tjmax

150

℃

※

1

Not to exceed Pd and ASO.

※

2

TO252-5: Reduced by 10.4 mW/°C over 25 °C, when mount on a glass epoxy board : 70 mm

 70 mm  1.6 mm.

※

3

HRP5: Reduced by 12.8 mW/°C over 25 °C, when mount on a glass epoxy board : 70 mm

 70 mm  1.6 mm).

NOTE: This product is not designed for protection against radioactive rays.

No.11039EBT06