CS8151YNF16 datasheet(1/8 Pages) CHERRY

Part #	CS8151YNF16

Description	5V, 100mA Low Dropout Linear Regulator with WATCHDOG, RESET, & WAKE UP

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Manufacturer	CHERRY [Cherry Semiconductor Corporation]

Direct Link	http://www.cherrycorp.com/

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5V, 100mA Low Dropout Linear Regulator

with WATCHDOG, RESET, & WAKE UP

The CS8151 is a precision 5V, 100mA

micro-power voltage regulator with

very low quiescent current (400µA

typical at 200µA load). The 5V output

is accurate within ±2% and supplies

100 mA of load current with a typical

dropout voltage of 400mV.

Microprocessor control logic includes

Watchdog, Wake Up and

. This

unique combination of low quiescent

current and full microprocessor con-

trol makes the CS8151 ideal for use in

battery operated, microprocessor con-

trolled equipment.

The CS8151 WAKE UP function brings

the microprocessor out of Sleep mode.

The microprocessor in turn, signals its

WAKE UP status back to the CS8151

by issuing a WATCHDOG signal.

The WATCHDOG logic function mon-

itors an input signal (WDI) from the

microprocessor. The CS8151 responds

to the falling edge of the WATCH-

DOG signal which it expects at least

once during each wake-up period.

When the correct WATCHDOG signal

is received, a falling edge is issued on

the wake-up signal line.

is independent of VIN and

operates correctly to an output voltage

as low as 1V. A

signal is issued

in any of three situations. During

power up the

is held low until

the output voltage is in regulation.

During operation if the output voltage

shifts below the regulation limits, the

toggles low and remains low

until proper output voltage regulation

is restored. And finally, a

signal

is issued if the regulator does not

receive a WATCHDOG signal within

the WAKE UP period.

The

pulse width, WAKE UP

signal frequency, and WAKE UP delay

time are all set by one external capaci-

tor CDelay.

The regulator is protected against

short circuit, over voltage, and thermal

runaway conditions. The device can

withstand 74 volt load dump tran-

sients, making it suitable for use in

automotive environments.

RESET

1

Features

Error

Amplifier

Thermal

Shutdown

VIN

Bandgap

Reference

+

-

Current Limit

Sense

Current Source

(Circuit Bias)

RESET

Over

Voltage

Shutdown

Timing

Circuit

WATCHDOG

Circuit

Falling Edge

Detector

Sense

VOUT

Gnd

Delay

WDI

RESET

Circuit

VOUT

WAKE UP

Circuit

internally

connected on

TO-220 and

D2PAK

s

5V ±2% / 100 mA Output

Voltage

s

Micropower Compatible

Control Functions:

WAKE UP

WATCHDOG

s

Low Dropout Voltage:

400mV @ 100mA

s

Low Sleep Mode Quiescent

Current (400µA typ)

s

Protection Features:

Thermal Shutdown

Short Circuit

74V Load Dump

Reverse Transient (-50V)

RESET

Package Options

16 Lead PDIP

16 Lead SOIC Wide*

(Internally Fused)

1

N/C

Gnd

Sense

VOUT

Delay

______

RESET

WAKE UP

WDI

VIN

*N/C

* For SO Wide package, pin # 6 is Gnd

CS8151

Description

Block Diagram

7 Lead TO-220

Tab (Gnd)

1

7 Lead D2PAK

Tab (Gnd)

1

1. VOUT

2. VIN

3. WDI

4. Gnd

5. WAKE UP

6.

7. Delay

RESET

A

Company

¨

Rev. 5/4/99

Cherry Semiconductor Corporation

2000 South County Trail, East Greenwich, RI 02818

Tel: (401)885-3600 Fax: (401)885-5786

Email: info@cherry-semi.com

Web Site: www.cherry-semi.com

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CS8151YNF16 Datasheet(PDF) 1 Page - Cherry Semiconductor Corporation

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