XC6225 series is Not Recommended for New Designs. XC6225 Series ETR0342-006 30mA High Speed LDO Regulator GENERAL DESCRIPTION The XC6225 series is a high accuracy, low noise, and low dropout CMOS LDO regulator. The series includes a reference voltage source, an error amplifier, a driver transistor, a current limiter, and a phase compensation circuit. The CE function enables the entire circuit to be turned off by a low level input signal to the CE pin. In this stand-by state, the XC6225B series can discharge the electric charge stored at the output capacitor through the internal auto-discharge switch, and as a result the VOUT pin quickly returns to the VSS level. The output stabilization capacitor (CL) is also compatible with low ESR ceramic capacitors. Output voltage is selectable in 0.05V increments within a range of 0.8V~5.0V. The current limit fold-back circuit works as a short circuit protection as well as the output current limiter. The series achieves a fast response with only 25A of low power consumption. The current limit is set to 50mA (TYP.) so that the device is optimized to protect the circuit from over-current. It is ideally suited for applications requiring 30 mA or less. A small USP-4 package makes high density mounting possible. APPLICATIONS FEATURES Output Current : 30mA <50mA (TYP.) Limit> Smart phones / Mobile phones Dropout Voltage : 70mV IOUT=30mA, VOUT=3.2V Portable games Operating Voltage Range : 2.5V ~ 6.0V Digital still cameras / Camcorders Output Voltage Range : 0.8V~5.0V (0.05V increments) Digital audio equipment Accuracy : +2% (VOUT>1.5V) Mobile devices / terminals +0.03V (VOUT1.45V) Low Power Consumption : 25A (TYP.) Stand-by Current : Less than 0.1A High Ripple Rejection : 70dB 1kHz Operating Ambient : -40~+85 Temperature Output Capacitor : 1.0F ceramic capacitor C High-Speed Auto-Discharge (XC6225B) L Low Output Noise Packages : USP-4, SOT-25 SSOT-24 : EU RoHS Compliant, Pb Free Environmentally Friendly TYPICAL APPLICATION CIRCUIT VIN VOUT Input L C CE 1uF VSS IN C (Ceramic) 1uF (Ceramic) 1/15 XC6225 series is Not Recommended for New Designs. XC6225 Series PIN CONFIGURATION V NC OUT V V IN OUT 5 4 4 3 V SS 2 3 CE V OUT 1 4 V IN 1 2 1 2 3 CE V SS V V CE IN SS USP-4 SOT-25 SSOT-24 (BOTTOM VIEW) (TOP VIEW) (TOP VIEW) *The heat sink pad of the USP-4 is reference to be soldered to enhance the strength. Please refer to the reference mount pattern and metal mask pattern. This pad should be electrically opened or connected to the VSS (No.2) pin. PIN ASSIGNMENT PIN NUMBER PIN NAME FUNCTIONS USP-4 SOT-25 SSOT-24 4 1 4 VIN Power Input 1 5 3 VOUT Output 2 2 2 VSS Ground 3 3 1 CE ON/OFF Control - 4 - NC No Connection PIN FUNCTION ASSIGNMENT PIN NAME SIGNAL STATUS L Operation OFF CE H Operation ON OPEN Undefined state *CE pin should not be left open. Each should have a certain voltage. 2/15