The UCC3837 is a linear regulator controller from ON Semiconductor that is used in low voltage (3V) applications. The device contains all the necessary features to use an external N-channel MOSFET as the switch, and it can achieve an extremely low dropout voltage.
This document describes the UCC1837, UCC2837, and UCC3837, which are 8-pin N-FET linear regulator controllers. These devices include an on-board charge pump to drive an external N-channel MOSFET, enabling extremely low dropout voltage and high current levels for custom processor and bus termination voltages. The controllers operate from input voltages as low as 3V and provide output voltages as low as 1.5V.
| Input Voltage | As low as 3V |
|---|---|
| Output Voltage | As low as 1.5V |
| Package Type | 8-Pin |
| Under Voltage Lockout Minimum Voltage | 2.00 V |
| Reference Voltage (VREF) | 1.5 V |
| Comparator Offset (0°C to 70°C) | 90 mV |
| Error Amplifier Open Loop Gain | 60 dB |
| FET Driver Peak Output Current | 2.5 mA |
| Charge Pump CAP Voltage (VDD=4.5V) | 12.5 V |
The device can operate from input voltages as low as 3V.
Grounding the CAP pin removes the drive voltage and disables the output voltage.