XC6501B251MR

输出电容的，低功耗，高速LDO稳压器 Output Capacitor-Less, Low Power Consumption, High Speed LDO Regulator

■GENERAL DESCRIPTION

The XC6501 series is a 6.0V high speed, low noise CMOS LDO regulator that can provide stable output voltages within a range

of 1.2V to 5.0V 0.05V increments even without a load capacitor CL. This is possible because phase compensation is carried

out internally unlike other LDOs where it is done externally. The series consists of a reference voltage source, driver transistor,

error amplifier, current limit circuit, and phase compensation circuit.

The CE function enables the circuit to be put into stand-by mode by inputting a low level signal to the CE pin thereby reducing

current consumption from an already low 13μA in operation to less than 0.1μA. In the stand-by mode, if a CL cap is used, the

electric charge stored at CL can be discharged via the internal auto-discharge switch and as a result, the VOUT pin quickly returns

to the VSS level.

The current limit fold-back circuit operates as a short circuit protection and a current limiter function for the output pin.

■FEATURES

Operating Voltage Range : 1.4～6.0V

Output Voltage Range : 2.0～5.0V（Accuracy:±1%）

                       1.2～1.95V（Accuracy:±0.02V）

Dropout Voltage : 150mV＠IOUT=100mA, VOUT=2.8V

Low Power Supply : 13μA＠VOUT=2.8V

Stand-by Current : Less than 0.1μA

Ripple Rejection : 50dB＠f=1kHz,VOUT=2.8V

Protection Circuits : Current limit （300mA, TYP.）

                    : Short circuit protection

Output capacitor is not required : Internal phase compensation

CL High Speed Auto Discharge

Packages USP-3, USP-4

SSOT-24, SOT-25

■APPLICATIONS

●Mobile phones （RF, Digital cash, I/O etc.）

●Portable games

●Camera modules

●Wireless LAN modules

●LCD modules

●Bluetooth

●Digital-TV tuners