XC6401Series
ETR0309_005
Dual LDO Regulators, Low ESR Cap. Compatible
■GENERAL DESCRIPTION
The XC6401 series are highly accurate, Dual, low noise, CMOS LDO voltage regulators. Performance features of the series
includes low output noise, high ripple rejection ratio, low dropout and very fast turn-on times.
The XC6401 includes a reference voltage source, error amplifiers, driver transistors, current limiters and phase
compensators internally. The XC6401’s current limiters' foldback circuit also operates as a short protect for the output current
limiter. The output voltage for each regulator is set independently by laser trimming. Voltages are selectable in 50mV steps
within a range of 0.8V to 5.0V. The XC6401 series is also fully compatible with low ESR ceramic capacitors, reducing cost
and improving output stability.
This high level of output stability is maintained even during frequent load fluctuations, due to the excellent transient response
performance and high PSRR achieved across a broad range of frequencies. The EN function allows the output of each
regulator to be turned off independently, resulting in greatly reduced power consumption. The XC6401 series is available in
the SOT-26W or USP-6B, USP-6C ‘chip-scale’ package.
■APPLICATIONS
●Mobile Phones
■FEATURES
Maximum Output Current : More than 150mA (300mA limit)
●Cordless phones and
radio communication equipment
●Portable games
●Cameras, Video recorders
●Portable Audio Equipment
●PDAs
Dropout Voltage
: 100mV @100mA
: 1.5V ~ 6.0V
Operating Voltage Range
Output Voltage Range
Highly Accurate
: 0.8V~5.0V (50mV increments)
: ±2% (VOUT>1.5V)
: ±30mV (VOUT≦1.5V)
: 25μA (TYP.)
Low Power Consumption
Standby Current
: Less than 0.1μA (TYP.)
: 70dB @1kHz
High Ripple Rejection
Operating Temperature Range : -40℃ ~ +85℃
Low ESR Capacitor Compatible : Ceramic capacitor
Low Output Noise
Ultra Small Packages
: SOT-26W,USP-6B,USP-6C
■
TYPICAL PERFORMANCE
■TYPICAL APPLICATION CIRCUITS
CHARACTERISTICS
●SOT-26W
●Interactive Load Transient Response
EN1
VOUT1
CL1
1uF
VIN
VSS
CIN
1uF
EN2
VOUT2
CL2
1uF
●USP-6
EN2VOUT2
6
5
4
1
2
VIN
VOUT1
EN1
VSS
3
CIN
CL1
CL2
1uF
1uF
1uF
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