ETR0328_009
■GENERAL
DESCRIPTION
The XC6221 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. In this stand-by mode, the
electric charge at the output capacitor (CL) will be discharged by 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, 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 25μA of low power consumption. Also the series has low dropout voltage
characteristics, which is 80mV at IOUT=100mA and VOUT=3.0V.
With the use of small USP-4 and ultra small USPN-4 packages, a small footprint circuit can be designed.
■APPLICATIONS
●Cellular
phones
●Cordless
phones
●Wireless
communication equipment
●Portable
games
●Cameras,
VCRs
●Portable
AV equipment
●PDAs
■FEATURES
: 200mA <Up to 250mA (TYP.)>
:80mV@ I
OUT
=100mA,V
OUT
=3.0V
: 1.6V ~ 6.0V
: 0.8V~5.0V (0.05V increments)
: +2% (V
OUT
>1.5V)
(+1% option is available)
+30mV (V
OUT
≦1.45V)
(+20mV option is available)
Low Power Consumption
: 25μA (TYP.)
Stand-by Current
: Less than 0.1μA
High Ripple Rejection
: 70dB @ 1kHz
Operating Temperature
: -40℃~85℃
Low ESR Capacitor
: 1.0μF ceramic capacitor
CL High-Speed Auto-Discharge (XC6221B)
CE Pin internally pulled-down
Low Output Noise
Ultra Small Packages
: USP-4, SOT-25, SSOT-24
USPN-4
Output Current
Dropout Voltage
Operating Voltage Range
Output Voltages
Accuracy
■TYPICAL
APPLICATION CIRCUIT
■
TYPICAL PERFORMANCE
CHARACTERISTICS
●Load
Transient Response
XC6221x182
V
IN
=CE=2.8V, Tr=Tf=5us
Topr=25
℃
, C
IN
=C
L
=1uF (ceramic)
Output Voltage
1.8
Output Voltage: V
OUT
(V)
1.7
1.6
Output Current
1.5
1.4
1.3
Time (500us/div)
100
50
0
250
200
Output Current:
OUT
(mA)
I
1.9
300
150
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TOREX [ TOREX SEMICONDUCTOR ]
