L4903 is a dual 5V regulator with reset and disable functions. It provides output currents of 50mA and 100mA. The fixed precision output voltage is 5V±2%. The reset function is controlled by the input voltage and output 1 voltage. The timing of the reset function can be externally programmed. The reset output level is related to output 2. Output 2 is internally switched with active discharging. Output 2 can be disabled using a logical input. It has low leakage current, less than 1µA at output 1. It also features input overvoltage protection up to 60V. The reset output is normally low. The output transistors have SOA protection. It provides short circuit and thermal overload protection.
The L4903 is a monolithic low drop dual 5V regulator designed mainly for supplying microprocessor systems. It provides two voltage regulators (both 5V high precision) with separate inputs, plus a reset output for data save functions and a Reg. 2 disable input. The device allows for reset, data save functions, and remote switch on/off control.
| Output Voltage | 5V ± 2% |
|---|---|
| Output Current 1 | 50mA |
| Output Current 2 | 100mA |
| Input Overvoltage Protection | 60V |
| DC Input Voltage | 24 V |
| Power Dissipation | 1 W |
| Leakage Output 1 Current | 1 µA |
The device provides a fixed precision output voltage of 5V ± 2%.
Regulator 1 provides a maximum of 50mA, while Regulator 2 provides a maximum of 100mA.
The maximum DC input voltage rating is 24V.