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CS8129

Cherry Semiconductor Corporation
Part Number CS8129
Manufacturer Cherry Semiconductor Corporation
Description 5V 750mA Low Dropout Linear Regulator
Published Mar 24, 2005
Detailed Description CS8129 CS8129 5V, 750mA Low Dropout Linear Regulator with Lower RESET Threshold Description The CS8129 is a precision 5...
Datasheet PDF File CS8129 PDF File

CS8129
CS8129

Overview
CS8129 CS8129 5V, 750mA Low Dropout Linear Regulator with Lower RESET Threshold Description The CS8129 is a precision 5V linear regulator capable of sourcing 750mA.
The RESET threshold voltage has been lowered to 4.
2V so that the regulator can be used with 4V microprocessors.
The lower RESET threshold also permits operation under low battery conditions (5.
5V plus a diode).
The RESET Õs delay time is externally programmed using a discrete RC network.
During power up, 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 1V.
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 -50V to +40V.
Short circuit current is limited to 1.
2A (typ).
The CS8129 is packaged in a 5 lead TOÐ220 and a 16 lead surface mount package.
Features s 5V +/- 3% Regulated Output s Low Dropout Voltage (0.
6V @ 0.
5A) s 750mA Output Current Capability s Reduced RESET Threshold for use with 4V Microprocessors s Externally Programmed RESET Delay s Fault Protection Reverse Battery 60V, -50V Peak Transient Voltage Short Circuit Thermal Shutdown Block Diagram VIN Over Voltage Shutdown VOUT PreRegulator Regulated Supply for Circuit Bias Bandgap Reference Charge Current Generator Thermal Shutdown Package Options 16 Lead SOIC Wide VIN NC 1 VOUT NC VOUT(SENSE) Gnd Gnd Gnd NC NC Error Amplifier Anti-Saturation and Current Limit VOUTSENSE + + + - NC Gnd Gnd RESET NC Latching Discharge Delay Q + S R Delay 5 Lead TO-220 VDISCHARGE Delay Comparator RESET Gnd 1 ...


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