AMS6221
■GENERAL
DESCRIPTION
The
AMS
6221 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
AMS
6221 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 .
●Cellular
phones
APPLICATIONS
■FEATURES
Maximum Output Current
Dropout Voltage
Operating Voltage Range
Output Voltage Range
Accuracy
Low Power Consumption
Stand-by Current
High Ripple Rejection
CE Function
Stand-by Current
High Ripple Rejection
Low ESR Capacitor
Low Output Noise
Packages
Environmentally Friendly
Operating Ambient Temperature
:
300mA
(TYP.)
:
200mV@
I
OUT
=100mA
:
< 8V
:
2.0V~5.0V
: + 2% (Standard)
: 45uA (TYP.)
: Less than 1uA
: 70dB @ 1kHz
: CE Active High
: Less than 0.1μA
: 70dB @ 1kHz
●Cordless
phones
●Wireless
communication equipment
●Portable
games
●Cameras,
VCRs
●Portable
AV equipment
●PDAs
: SOT23-5
: EU RoHS Compliant, Pb Free
: -40℃~+85℃
■TYPICAL
APPLICATION CIRCUIT
Advanced Monolithic Systems
http://www.ams-semitech.com
AMS [ Advanced Monolithic Systems Ltd ]
