RC4391 is a power management chip produced by ROHM. It supports negative output and has a maximum operating voltage of 30V and a maximum operating temperature of 70°C.
The document is a product specification for the Fairchild RC4391, a switching inverter integrated circuit. It details the device's pin assignments, absolute maximum ratings, and thermal characteristics for various package types including PDIP, SOIC, and CerDIP.
The specification covers electrical characteristics such as supply voltage, reference voltage, and output voltage regulation. It also explains the principles of operation for both inverting and step-down regulator circuits, providing schematic diagrams and design equations for selecting the inductor and timing capacitor values.
| Operating Temperature (RC4391) | 0 to 70 °C |
|---|---|
| Operating Temperature (RV4391) | -25 to 85 °C |
| Operating Temperature (RM4391) | -55 to 125 °C |
| Reference Voltage | 1.25 V |
| Switch Leakage Current | 0.1 to 30 mA |
| Minimum Load Current | 1 mA |
The typical reference voltage is 1.25 V.
The circuit must have a minimum load of at least 1 mA always connected.