XC6401
Series
Dual LDO Regulators, Low ESR Cap. Compatible
ETR0309_005
■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
●Cordless
phones and
radio communication equipment
●Portable
games
●Cameras,
Video recorders
●Portable
Audio Equipment
●PDAs
■FEATURES
Maximum Output Current
Dropout Voltage
Operating Voltage Range
Output Voltage Range
Highly Accurate
Low Power Consumption
Standby Current
High Ripple Rejection
: More than 150mA (300mA limit)
: 100mV @100mA
: 1.5V ~ 6.0V
: 0.8V~5.0V (50mV increments)
: ±2% (V
OUT
>1.5V)
: ±30mV (V
OUT
≦1.5V)
: 25μA (TYP.)
: Less than 0.1μA (TYP.)
: 70dB @1kHz
Operating Temperature Range
: -40℃ ~ +85℃
Low ESR Capacitor Compatible
: Ceramic capacitor
Low Output Noise
Ultra Small Packages
: SOT-26W,USP-6B,USP-6C
■TYPICAL
APPLICATION CIRCUITS
■TYPICAL
PERFORMANCE
CHARACTERISTICS
●SOT-26W
EN1
V
OUT1
●Interactive
Load Transient Response
6
C
L1
1uF
1
2
V
IN
EN2
V
SS
V
OUT2
5
C
IN
1uF
4
3
C
L2
1uF
●USP-6
1
2
C
IN
1uF
3
EN2 V
OUT2
V
IN
V
OUT1
EN1 V
SS
6
5
4
C
L1
1uF
C
L2
1uF
1/24
TOREX [ TOREX SEMICONDUCTOR ]
