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2009.07 - Rev.A

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Power Management IC Series for Automotive Body Control

Regulator with Voltage Detector IC

BD3951F

●

Description

BD3951F is a 5V LDO system regulator particularly developed for automotive applications. The output current of the

regulator can be drawn up to 150mA, and it has built-in power-on reset and input voltage sense. This device can withstand

50V surge input voltage as well as wide ambient temperature operations from -40℃ to +125℃. The adjustable reset delay

time and detection input voltage allow to meet with wide range of design requirements.

●

Features

1) Micro processor power supply 5.0V, Adjustable Reset, Adjustable Comparator.

2) 5V is Pch DMOS type low drop out voltage regulator. Iomax=150mA.

3) Low ESR capacitor (Ceramic Capacitor) is available for the Output Capacitor.

4) Over Current Protection built in to prevent the destruction of IC.

5) Thermal Shut Down is built in to prevent the heat runaway.

6) VCC absolute Maximum Ratings 36V.

7) Vcc peak input voltage 50V (*1)

8) Small surface mount package SOP8.

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Applications

Automotive application (Rain Sensor and Cluster Panel etc.) and all other electronics application.

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Absolute Maximum Ratings (Ta=25℃)

Parameter

Symbol

Limit

Unit

Vcc Input Voltage

Vcc

-0.3～+36

V

Out Terminal Voltage

Vout

-0.3～+7

V

RES Terminal Voltage

Vres

-0.3～+7

V

SOUT Terminal Voltage

Vsout

-0.3～+7

V

RES Output Current

Ires

0.2

mA

SOUT Output Current

Isout

2.5

mA

SIN Input Voltage

Vsin

-0.3～+36

*3

V

Power Dissipation

Pd

687

*2

mV

Operating Temperature Range

Topr

-40～+125

℃

Storage Temperature Range

Tstg

-55～+150

℃

Vcc Peak Input Voltage

Vccpeak

50

*1

V

*1 tr (rising time) is over 1msec, applied voltage is less than 400msec

*2 Pd is derated at 5.5mW/℃ for temperature above Ta=25℃, mounted on 70mm×70mm×1.6mm PCB.

*3 Input current from Vcc to SIN PIN has to be equal and less than 5mA when Vcc voltage is less than SIN PIN voltage.

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Operating Conditions (Ta=-40℃～+125℃)

Parameter

Symbol

Limit

Unit

Min.

Typ.

Max.

Recommended Supply Voltage

*4

Vcc

6.0

13.5

20

V

Operatinal Supply Voltage

*5

Vcc

5.5

13.5

36

V

Reset Adjustable Range

Vdet

4

-

4.7

V

Reset Delay Time Controllable Range

Cct

-

-

10

μF

Vcc Detection Adjustable Range

Vcc

5

-

-

V

*4 The range within test condition of the electrical characteristics.

*5 The range exceeding the test condition of the electrical characteristics.

No.09039EAT05