描述 Description

The UTC LC1111 is a low dropout linear regulator controller forapplications requiring high-current and ultra low dropout voltages.The use of an external N-Channel MOSFETand provide an adjustable output by using an external resistive divider. An extremely accurate 0.8V (2%) reference allows thimplementation of sub 1 V voltage supplies. The reference isguaranteed over the complete supply and temperature ranges. The UTC LC1111 integrates various functions. For example, a Power-On-Reset (POR) circuit monitors V CC? supply voltage to prevent wrong operations; the? function of Under-Voltage Protection (UVP) protects the device from short circuit condition. The soft-start of output voltage is adjustable by the external capacitor on SS pin. Moreover, the UTC LC1111 can be enabled by other power system; namely, holding the EN above 1.6V enables output and pulling the EN under 0.4 disables output.

特性 Features

4.5V~13.5V supply voltage range0.8V (2%) voltage refeence (temperature and process)Power-On-Reset monitoring on VCC Fast transient responseProgrammable soft-startEnable control functionLow shutdown currentUnder-Voltage protectionTwo versions of IC available:UVP activated after VOUT? is ready