AMS6221 Datasheet, PDF (1/5 Pages) Advanced Monolithic Systems Ltd – LOW ESR CAPS COMPATIBLE HIGH SPEED LDO VOLTAGE REGULATOR

AMS6221
■GENERAL DESCRIPTION
The AMS6221 series is a high accuracy, low noise, high speed, low dropout CMOS regulator with high ripple rejection.The series
includes a reference voltage source, an error amplifier, a current limiter, and a phase compensation circuit.
The CE function enables the entire circuit to be in stand-by state by inputting low level signal. As for the AMS6221 stand-by
mode, the electric charge at the output capacitor (C_L) will be discharged by the internal auto-discharge switch, and as a result
the V_OUT pin quickly returns to the V_SS level. The output stabilization capacitor (C_L) is also compatible with low ESR ceramic
capacitors.
Output voltage is selectable in 0.1V increments within a range of 2.0V~5.00V, using the laser trimming technology set in
factory.
The current limiter's fold-back circuit also operates as a short circuit protection and an output current limiter at the output pin.
The series achieves a fast response with only 45μA of low power consumption. Also the series has low dropout voltage
characteristics, which is 200mV at I_OUT=100mA .
APPLICATIONS
●Cellular phones
●Cordless phones
●Wireless communication equipment
●Portable games
●Cameras, VCRs
●Portable AV equipment
●PDAs
■FEATURES
Maximum Output Current : 300mA (TYP.)
Dropout Voltage
Operating Voltage Range
: 200mV@ I_OUT=100mA
: < 8V
Output Voltage Range
Accuracy
Low Power Consumption
Stand-by Current
High Ripple Rejection
CE Function
Stand-by Current
: 2.0V~5.0V
: + 2% (Standard)
: 45uA (TYP.)
: Less than 1uA
: 70dB @ 1kHz
: CE Active High
: Less than 0.1μA
High Ripple Rejection
: 70dB @ 1kHz
Low ESR Capacitor
Low Output Noise
Packages
Environmentally Friendly
: SOT23-5
: EU RoHS Compliant, Pb Free
Operating Ambient Temperature : -40℃~+85℃
■TYPICAL APPLICATION CIRCUIT
Advanced Monolithic Systems http://www.ams-semitech.com