XC6221 Series
ETR0328_015
■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. As for the XC6221B/D 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 0.80V~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 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
■FEATURES
●Smart phones / Mobile phones
Maximum Output Current
Dropout Voltage
Operating Voltage Range
Output Voltage Range
Accuracy
●Portable game consoles
●Digital still cameras / Camcorders
●Digital audio equipments
●Mobile devices / terminals
Low Power Consumption
Stand-by Current
High Ripple Rejection
CE Function
: 200mA
: 80mV@ IOUT=100mA,VOUT=3.0V
: 1.6V ~ 6.0V
: 0.80V~5.00V (0.05V increments)
: +2% (VOUT >1.50V) (Standard)
+30mV (VOUT≦1.45V) (Standard)
+1% (VOUT >2.00V) (High Accuracy)
+20mV (VOUT≦1.95V) (High Accuracy)
: 25μA (TYP.)
: Less than 0.1μA
: 70dB @ 1kHz
: CE Active High
Standby current below 0.1μA
CL High-Speed Auto-Discharge
(XC6221B/D)
CE Pin internally pulled-down
(XC6221C/D)
: 1.0μF ceramic capacitor
Low ESR Capacitor
Low Output Noise
Operating Ambient Temperature : -40℃~+85℃
Packages
: USP-4, SOT-25, SSOT-24
USPN-4
: EU RoHS Compliant, Pb Free
Environmentally Friendly
■ TYPICAL PERFORMANCE
CHARACTERISTICS
●Load Transient Response
1.9
XC6221x182
VIN=VCE=2.8V , Tr=Tf=5μs
Ta=25℃ , CIN=CL=1.0μF (ceramic)
300
Output Voltage
250
1.7
200
1.6
1.5
150
100mA
Output Current
100
1.4
Output Current: I OUT (mA)
1.8
Output Voltage: VOUT (V)
■TYPICAL APPLICATION CIRCUIT
50
10mA
1.3
0
Time: (500μs/div)
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