The CS5111 is a dual output power management integrated circuit that includes a 5V ±2%, 100mA linear regulator, a watchdog timer, a linear output voltage monitor to provide a Power On Reset (POR) and a 1.4A current mode PWM switching regulator. The 5V linear regulator is comprised of an error amplifier, reference, and supervisory functions. It has low internal supply current consumption and provides 1.2V (typical) dropout voltage at maximum load current. The watchdog timer circuitry monitors an input signal (WDI) from the microprocessor. It responds to the falling edge of the WDI signal and restarts the device within 250ms. The CS5111 has a 54V peak transient capability to protect the load during a power failure.
The CS5111 is a dual output power supply integrated circuit manufactured by Cherry Semiconductor. It combines a 5V linear regulator with a 1.4A current mode PWM switching regulator in a single package. The device includes smart functions such as a watchdog timer, Power On Reset (POR), and various protection circuitries including overvoltage shutdown and overtemperature limiting.
| Switching Regulator Output Current | 1.4A |
|---|---|
| Linear Regulator Output Voltage | 5V |
| Linear Regulator Dropout Voltage | 1.2V |
| Operating Supply Voltage Range | 5V to 26V |
| Maximum Switching Frequency | 120kHz |
| Package Type | 24 Lead SO Wide |
| Peak Transient Capability | 54V |
It monitors an input signal from the microprocessor and issues a reset signal if a correct signal is not received within the programmable time.
The typical dropout voltage is 1.2V at maximum load current.