USP6C – XC6220

1A High Speed LDO Voltage Regulator with “GreenOperation”

The XC6220 series is a highly accurate, low noise, high speed, low dropout, and large current CMOS voltage regulator with GreenOperation function. The series consists of a voltage reference, an error amplifier, a currentlimiter, an inrush current prevention circuit and a phase compensation circuit　plus a driver transistor.

With a 0.2Ω on-resistance driver transistor integrated and with output　currents up to 1A, the ultra low dropout voltage performance greatly extends　battery life as does the GreenOperation function which can switch between high speed and power save modes automatically. Low ESR ceramic capacitors can be used for the output stabilization capacitor (C_L).

Output voltage is selectable in 0.05V increments within the range of 0.8V~5.0V, using laser trimming technologies.

An over current protection circuit and a thermal shutdown circuit are built in. The over current protection circuit will operate when the output current reaches its limit current. The thermal shutdown circuit will operate when the junction temperature reaches its limit emperature. The inrush protection circuit works by controlling the inrush current which is charged to C_L when the IC starts up. In this way, any fluctuations to V_IN caused by inrush current during system start up can be minimized.

The CE function enables the output to be turned off and the IC becomes a stand-by mode resulting in greatly reduced power consumption.

Typical Application Circuit

Features