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CS8129YTHA5 Datasheet(PDF) 1 Page - Cherry Semiconductor Corporation |
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CS8129YTHA5 Datasheet(HTML) 1 Page - Cherry Semiconductor Corporation |
1 / 8 page 1 5V, 750mA Low Dropout Linear Regulator with Lower RESET Threshold Features s 5V +/- 3% Regulated Output s Low Dropout Voltage (0.6V @ 0.5A) s 750mA Output Current Capability s Reduced Threshold for use with 4V Micro- processors s Externally Programmed Delay s Fault Protection Reverse Battery 60V, -50V Peak Transient Voltage Short Circuit Thermal Shutdown RESET RESET Package Options 5 Lead TO-220 1 VIN NC NC Gnd Gnd NC Delay RESET VOUT NC VOUT(SENSE) Gnd Gnd Gnd NC NC Description The CS8129 is a precision 5V linear reg- ulator capable of sourcing 750mA. The threshold voltage has been lowered to 4.2V so that the regulator can be used with 4V microprocessors. The lower threshold also per- mits operation under low battery condi- tions (5.5V plus a diode). The Õs delay time is externally programmed using a discrete RC network. During power up, or when the output goes out of regulation, remains in the low state for the duration of the delay. This function is independent of the input voltage and will function correct- ly as long as the output voltage remains at or above 1V. Hysteresis is included in the Delay and the 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 regu- lator is protected against voltage tran- sients 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. RESET RESET RESET RESET RESET Block Diagram VOUT VIN Over Voltage Shutdown Pre- Regulator Regulated Supply for Circuit Bias Bandgap Reference Anti-Saturation and Current Limit - + + - Q R S Delay Gnd VOUTSENSE Error Amplifier Delay Comparator Latching Discharge Charge Current Generator RESET Thermal Shutdown VDISCHARGE CS8129 1VIN 2 3 Gnd 4 Delay 5VOUT RESET 1 16 Lead SOIC Wide A Company ¨ Rev. 3/31/99 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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