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CS8121YT5 Fiches technique(PDF) 1 Page - ON Semiconductor |
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CS8121YT5 Fiches technique(HTML) 1 Page - ON Semiconductor |
1 / 8 page 1 Features s 5V ± 4% Output Voltage s Low Dropout Voltage (1.2V @ 1A) s Low Quiescent Current (4mA @ IOUT = 1A) s µP Compatible Control Functions s Low Current Sleep Mode IQ = 250µA s Fault Protection Thermal Shutdown Short Circuit 60V Peak Transient Voltage ENABLE RESET Package Options 5 Lead TO-220 1 5V, 1A Linear Regulator with and ENABLE RESET CS8121 Description Block Diagram 1VIN 2 3 Gnd 4 5VOUT RESET ENABLE 7 Lead D2PAK 1 1NC 2VIN 3 4 Gnd 5 6VOUT 7VOUT(SENSE) RESET ENABLE December, 2001 - Rev. 7 ON Semiconductor 2000 South County Trail, East Greenwich, RI 02818 Tel: (401)885–3600 Fax: (401)885–5786 N. American Technical Support: 800-282-9855 Web Site: www.cherry–semi.com The CS8121 is a 5V, 1A precision linear regulator with two microprocessor compatible control functions and pro- tection circuitry included on chip. The composite NPN-PNP output pass tran- sistor assures a lower dropout voltage (1.2V @ 1A) without requiring exces- sive supply current (4mA). The CS8121’s two logic control func- tions make this regulator well suited to applications requiring microprocessor- based control at the board or module level. controls the output stage. A high voltage (>2.9V) on the lead turns off the regula- tor’s pass transistor and sends the IC into Sleep mode where it draws only 250µA. sends a signal when the IC is powering up or when- ever the output voltage falls out of reg- ulation. The signal is valid down to VOUT = 1V. The CS8121 design optimizes supply rejection by switching the internal bandgap reference from the supply input to the regulator output as soon as the nominal output voltage is achieved. Additional on chip filtering enhances rejection of high frequency transients on all external leads. The CS8121 is fault protected against short circuit, over voltage and thermal runaway conditions. RESET RESET RESET ENABLE ENABLE Over Voltage Shutdown RESET Comparator Error Amplifier TO VOUT + + - VREF ENABLE Comparator Bandgap Supply Output Current Limit Bandgap Reference Thermal Shutdown - VIN ENABLE RESET VOUT Gnd VOUT(SENSE) 5 Lead TO-220 |
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