XC6401 Series
Dual LDO Regulators, Low ESR Cap. Compatible
November 7, 2003 Ver. 4
Preliminary
Low Power Consumption
APPLICATIONS
!
: 25 µA (TYP)
!
Mobile phones (PDC, GSM, CDMA, IMT2000 etc.)
Cordless phones and radio communication equipment
Portable games
! Dropout Voltage
: 30mV @ 30mA
"
"
"
"
"
"
: 100mV @ 100mA
: 0.8 V to 5.0 V
Output Voltage Range
!
Output Current
Cameras, Video recorders
!
: More than 150 mA (300mA limit)
: 70 dB @ 1kHz
High Ripple Rejection Rate
Portable AV equipment
!
Low Output Noise
PDAs
!
Low ESR capacitor compatible
!
! GENERAL DESCRIPTION
! FEATURES
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.
Maximum Output Current
: 150mA or more (300mA limit)
: 100mV (IOUT=100mA)
: 1.5V ~ 6.0V
Dropout Voltage
Operating Voltage Range
Output Voltage Range
Highly Accurate
: 0.8V ~ 5.0V (50mV Step)
: ±2% (VOUT>1.5V)
: ±30mV (VOUT≤1.5V)
: 25 mA (TYP.)
Low Power Consumption
Standby Current
: Less than 0.1µA (TYP.)
: 70dB (1kHz)
High Ripple Rejection
: -40OC ~ +85OC
Operating Temperature Range
Low ESR Capacitor Compatible
: Ceramic capacitor
: SOT-26W
Ultra Small Packages
USP-6B
! TYPICAL APPLICATION CIRCUITS
! TYPICAL PERFORMANCE CHARACTERISTICS
# Cross Talk
EN1
V
OUT1
C
1uF
L1
XC6401 (VR1:3.0V, VR2:2.85V)
VIN
V
SS
C
1uF
IN
VIN=4.0V, CIN= CL=1uF (ceramics)
3.1
500
400
300
200
100
0
EN2
V
OUT2
VR1 Output Voltage (3.0V)
C
1uF
L2
3.0
2.9
VR2 Output Voltage (2.85V)
2.8
EN2VOUT2
6
5
4
1
2
100mA
VR1 Output Current
VIN
VOUT1
2.7
10mA
EN1
VSS
3
C
1uF
IN
C
1uF
L1
CL2
1uF
2.6
Time (40usec/div)
Semiconductor Ltd.
1
Data Sheet
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