
XC6401 Series
Dual LDO Regulators, Low ESR Cap. Compatible November 7, 2003 Ver. 4
Preliminary
!Low Power Consumption : 25 µA (TYP) !APPLICATIONS
!Dropout Voltage : 30mV @ 30mA "Mobile phones (PDC, GSM, CDMA, IMT2000 etc.)
: 100mV @ 100mA "Cordless phones and radio communication equipment
!Output Voltage Range : 0.8 V to 5.0 V "Portable games
!Output Current : More than 150 mA (300mA limit) "Cameras, Video recorders
!High Ripple Rejection Rate : 70 dB @ 1kHz "Portable AV equipment
!Low Output Noise "PDAs
!Low ESR capacitor compatible
!GENERAL DESCRIPTION !FEATURES
Maximum Output Current : 150mA or more (300mA limit)
Dropout Voltage : 100mV (IOUT=100mA)
Operating Voltage Range : 1.5V ~ 6.0V
Output Voltage Range : 0.8V ~ 5.0V (50mV Step)
Highly Accurate : ±2% (VOUT>1.5V)
: ±30mV (VOUT≤1.5V)
Low Power Consumption : 25 mA (TYP.)
Standby Current : Less than 0.1µA (TYP.)
High Ripple Rejection : 70dB (1kHz)
Operating Temperature Range : -40OC ~ +85OC
Low ESR Capacitor Compatible : Ceramic capacitor
Ultra Small Packages : SOT-26W
USP-6B
!TYPICAL APPLICATION CIRCUITS !TYPICAL PERFORMANCE CHARACTERISTICS
#Cross Talk
V
IN
123
46
V
SS
V
OUT1
V
OUT2
EN1
EN2
5
C
IN
1uF
C
L2
1uF
C
L1
1uF
6
V
OUT2
V
OUT1
V
SS
EN2
V
IN
EN1
5
4
1
2
3
C
IN
1uF C
L1
1uF C
L2
1uF
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 ‘chip-
scale’ package.
2.6
2.7
2.8
2.9
3.0
3.1
Time (40usec/div)
Output Voltage VOUT (V)
0
100
200
300
400
500
Output Current 1 IOUT (mA)
10mA
100mA
XC6401 (VR1:3.0V, VR2:2.85V)
VIN=4.0V, CIN= CL=1uF (ceramics)
VR1 Out
ut Volta
e
3.0V
VR2 Out
ut Volta
e
2.85V
VR1 Output Current
S e m ic onduc tor Ltd.
Data Sheet 1