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CS8129
(Rev.:2008)

5.0 V, 750 mA Low Dropout Linear Regulator with Lower RESET Threshold

ON Semiconductor 

CS8129

5.0 V, 750 mA Low Dropout

Linear Regulator with

Lower RESET Threshold

The CS8129 is a precision 5.0 V linear regulator capable of sourcing

750 mA. The RESET threshold voltage has been lowered to 4.2 V so

that the regulator can be used with 4.0 V microprocessors. The lower

RESET threshold also permits operation under low battery conditions

(5.5 V plus a diode). The RESET’s delay time is externally

programmed using a discrete RC network. During powerup, or when

the output goes out of regulation, RESET remains in the low state for

the duration of the delay. This function is independent of the input

voltage and will function correctly as long as the output voltage

remains at or above 1.0 V. Hysteresis is included in the Delay and the

RESET comparators to improve noise immunity. A latching discharge

circuit is used to discharge the delay capacitor when it is triggered by a

brief fault condition.

The regulator is protected against a variety of fault conditions: i.e.

reverse battery, overvoltage, short circuit and thermal runaway

conditions. The regulator is protected against voltage transients ranging

from −50 V to +40 V. Short circuit current is limited to 1.2 A (typ).

The CS8129 is packaged in a 16 lead surface mount package.

Features

• 5.0 V ±3.0% Regulated Output

• Low Dropout Voltage (0.6 V @ 0.5 A)

• 750 mA Output Current Capability

• Reduced RESET Threshold for Use with 4.0 V Microprocessors

• Externally Programmed RESET Delay

• Fault Protection

− Reverse Battery

− 60 V, −50 V Peak Transient Voltage

− Short Circuit

− Thermal Shutdown

• These are Pb−Free Devices

http://onsemi.com

MARKING

DIAGRAM

16

16

1

SO−16WB

DW SUFFIX

CASE 751G

CS8129

AWLYYWWG

1

A

WL

YY, Y

WW

G

= Assembly Location

= Wafer Lot

= Year

= Work Week

= Pb−Free Package

ORDERING INFORMATION

Device

Package

Shipping†

CS8129YDW16G SO16WB 47 Units / Rail

(Pb−Free)

CS8129YDWR16G SO16WB 1000/Tape & Reel

(Pb−Free)

†For information on tape and reel specifications,

including part orientation and tape sizes, please

refer to our Tape and Reel Packaging Specifications

Brochure, BRD8011/D.

*For additional information on our Pb−Free strategy and soldering details, please

download the ON Semiconductor Soldering and Mounting Techniques

Reference Manual, SOLDERRM/D.

© Semiconductor Components Industries, LLC, 2008

1

September, 2008 − Rev. 9

Publication Order Number:

CS8129/D

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