The CS8127 is a 5V linear regulator that uses an external pass device to produce superior performance compared to conventional monolithic regulators.
The CS8127 is a 5V linear controller/driver that contains all necessary control circuitry to implement a 5V linear regulator. It utilizes an external pass device to achieve superior performance, such as a 100mV dropout voltage at 500mA and a quiescent current of only 5mA at that load. The device is compatible with a wide variety of external transistors, allowing flexibility for thermal, space, and cost management.
| Output Voltage | 4.85V to 5.15V |
|---|---|
| Dropout Voltage | 0.1V to 0.6V |
| Supply Current | 4 to 8 mA |
| Line Regulation | 12 to 50 mV |
| Ripple Rejection | 60 to 70 dB |
| Vin Overvoltage Shutdown | 32V to 40V |
| Thermal Shutdown | approx. 180°C |
The CS8127 with a TIP42 PNP transistor typically provides a 100mV dropout voltage at 500mA.
The quiescent current at 500mA is only 5mA.
The overvoltage shutdown circuit typically occurs at 36V.
For proper operation over temperature, the recommended value for the bias resistor is 560Ω.