XC6221 Datasheet, PDF (1/20 Pages) Torex Semiconductor – Low ESR Caps Compatible High Speed LDO Voltage Regulators with ON/OFF Switch

◆CMOS Low Power Supply Voltage Regulators
◆Output Current: 200mA <Up to 250mA (TYP.)>
◆Dropout Voltage: 80mV@IOUT=100mA, VOUT(T)=3.0V
◆Output Voltage Range: 0.8V ~ 4.0V
◆Low ESR Capacitor Compatible
◆High Ripple Rejection, Low Output Noise
◆CL High-Speed Auto-Discharge (XC6221B)
◆Ultra Small Package: USP-4
■APPLICATIONS
●Cellular phones
●Cordless phones
●Wireless communication equipment
●Portable games
●Cameras, VCRs
●Portable AV equipment
●PDAs
■GENERAL DESCRIPTION
The XC6221 series are precise, low noise, high speed, low
dropout regulators. They are fabricated using Torex’s CMOS
process. Performance features of the series include high
ripple rejection and low dropout voltage, and the series include
a reference voltage source, an error amplifier, a current limiter,
and a phase compensation circuit.
The CE function enables the circuit to be in stand-by mode by
inputing L level signal. In the stand-by mode, the series
enables the electric charge at the output capacitor (CL) to be
discharged via the internal auto-discharge resistance, and as a
result the VOUT pin quickly returns to the VSS level. The series'
output stabilization capacitor (CL) is also compatible with low
ESR ceramic capacitors.
Output voltage is selectable in 50mV increments within a range
of 0.8V~4.0V, using laser trimming technologies.
The current limiter's foldback circuit also operates as a short
circuit protection for the output current limiter and the output
pin. The series achieves a great response with only 25μA of
low power consumption. Also the series has low dropout
voltage characteristics, which is 80mA at IOUT=100mA and
VOUT(T)=3.0V.
With the use of ultra small package, USP-4 package, a small
footprint circuit can be designed.
■TYPICAL APPLICATION CIRCUIT
■FEATURES
Output Current
: 200mA <Up to 250mA (TYP.)>
Dropout Voltage
: 80mV@ IOUT=100mA,
VOUT(T)=3.0V
Operating Voltage Range : 1.6V ~ 6.0V
Output Voltage
Setting Range
: 0.8V~4.0V (50mV increments)
Accuracy
: +2% (VOUT >1.5V)
+30mV (VOUT≦1.45V)
Low Power Consumption : 25μA (TYP.)
Standby Current
: Less than 0.1μA
High Ripple Rejection : 70dB @ 1kHz
Operating Temperature : -40℃~85℃
Range
Low ESR Capacitor
: 1.0μF Ceramic capacitor
compatible
Ultra Small Packages : USP-4, SOT-25, SSOT-24
■ TYPICAL PERFORMANCE
CHARACTERISTICS
●Load Transient Response
XC6221x182
VIN=CE=2.8V, Tr=Tf=5usec
Topr=25℃, CIN=CL=1uF(ceramic)
1.9
300
Output Voltage
1.8
250
1.7
200
1.6
150
Output Current
1.5 ^100mA
100
XC6221 ETR0328_002
1.4
10mA
1.3
Time (500usec/div)
50
0
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