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
p
ut Volta
g
e
(
3.0V
)
VR2 Out
p
ut Volta
g
e
(
2.85V
)
VR1 Output Current
S e m ic onduc tor Ltd.
Data Sheet 1
XC6401 Series
Dual LDO Regulators, Low ESR Cap. Compatible
Preliminary
!PIN CONFIGURATION !PIN ASSIGNMENT
*A Pin number 1 is under the marking of the leftmost of 4 digits.
!PRODUCT CLASSIFICATION
"SELECTION GUIDE
The following options for the Regulator 1, 2, the EN pin logic, internal pull-up / down are available.
"ORDERING INFORMATION XC6401123456
Regulator 1, EN type
Active 'High'
(Pull-down resistor built in)
Active 'High' Regulator 1 Output Voltage Range :
(No pull-down, resistor built in) 0.8 ~ 5.0 V
Active 'Low' Regulator 2 Output Voltage Range :
(Pull-down resistor built in) 0.8 ~ 5.0 V
Active 'Low' Both 1 and 2 can be set 50 mV steps
(No pull-down, resistor built in) Packaging Types
Regulator 2, EN type
Active 'High'
(Pull-down resistor built in)
Active 'High'
(No pull-down, resistor built in) Device Orientation
Active 'Low'
(Pull-down resistor built in)
Active 'Low'
(No pull-down, resistor built in)
DESCRIPTION
34 01 ~
USP-6B
Internally set sequential number relating
output voltage of each regulators
SOT-26W
Embossed Tape: Standard Feed
Embossed Tape: Reverse Feed
DESCRIPTION DESIGNATOR SYMBOL
5D
M
6
DESIGNATOR SYMBOL
1
2
E
F
G
H
H
E
R
L
PIN NUMBER PIN NAME FUNCTION
ON/OFF Control 1
31
6
Power Input
ON/OFF Control 2
Output 24
USP-6B
3
2
SOT-26W
1
2
EN1
VIN
EN2
VOUT2
F
G
Ground
6 5 VOUT1 Output 1
4 VSS5
SOT-26W
(TOP VIEW) USP-6B
(TOP VIEW)
VOUT2
VOUT1
VSS
EN2
VIN
EN1
123
4
56
EN2VINEN1
VSSVOUT1
1
2
34
5
6
VOUT2
S e m ic onduc tor Ltd.
Data Sheet 2
XC6401 Series
Dual LDO Regulators, Low ESR Cap. Compatible
Preliminary
!ABSOLUTE MAXIMUM RATINGS
Ta = 25OC
!ELECTRICAL CHARACTERISTICS
X
C6401FFxx
Regulator 1, Regulator 2 Ta=25OC
NOTE
(NOTE 1) VOUT(T)=Specified Output Voltage
(NOTE 2) VOUT(E)=Effective Output Voltage
(I.e. the output voltage when "VOUT(T)+1.0V" is provided at the VIN pin while maintaining a certain IOUT value).
(NOTE 3) Vdif={VIN1(NOTE5)-VOUT1(NOTE4)}
(NOTE 4) VOUT1=A voltage equal to 98% of the Output Voltage whenever an amply stabilized IOUT {VOUT(T)+1.0V} is input.
(NOTE 5) VIN1=The Input Voltage when VOUT1 appears as Input Voltage is gradually decreased.
(NOTE 6) Unless otherwise stated, VIN=VOUT(T)+1.0V
(NOTE 7) If VOUT (T) ≤ 1.45V, MIN VOUT (T) - 30mV
MAX VOUT (T) + 30mV
µA
0.10
µA
V0.25
V4
4
VEN VSS -0.3 ~ VIN +0.3 V
IOUT1 + IOUT2
VOUT
Supply Current ISS VIN=VEN=VOUT (T) + 1.0V,
IOUT=0mA
Output Voltage (Note 7) VOUT (E)
Load Regulation
Dropout Voltage
∆VOUT
VIN=VOUT (T) + 1.0V
Ilim
Input Voltage
Temperature Characteristics ∆Topr ⋅ VOUT
VIN=VOUT (T) + 1.0V,
VEN=VSS
IOUT=30mA, f=1kHz
-40OC≤Topr≤85OC
EN "Low" Current IENL
Storage Temperature
EN "High" Current IENH
EN "Low" Voltage VENL
Current Limiter
Short-circuit Current
Line Regulation
Vdif1 E-1
Operating Ambient Temperature
-55 ~ +125
CONDITIONS
Tstg
-40 ~ +85Topr
IOUT=30mA
VIN=VOUT (T) + 1.0V
IOUT=30mA
∆VOUT /
IOUT=30mA
IOUT=100mA
6.0
0.20
∆VIN ⋅ VOUT
∆VOUT /
VIN
VOUT(T)+1.0V≤VIN≤6.0V
IOUT=30mA
25 45
0.01
× 0.98
2
1
1.5
µA
V
% / V
E-2
60
MAX
V
TYP
VOUT(T) × 1.02
UNITS
Standby Current ISTB
150
Maximum Output Current IOUTMAX
1mA≤IOUT≤100mA
Vdif2
15
VIN=VEN=VOUT (T) + 1.0V, VEN=VSS
mA 1
4
0.10VIN=VEN=VOUT (T) + 1.0V
VIN=VOUT (T) + 1.0V, VEN=VIN 30
-0.10
4-0.10
300
1.60
Output Voltage
Ripple Rejection Rate PSRR
EN "High" Voltage VENH
Ishort VIN=VOUT (T) + 1.0V, VEN=VIN
70
mV
mV
1
dB 5
mA
VIN
µA
1
±100 1
3
ppm/
OC
0.01
0.10
PARAMETER SYMBOL
1mV
mA 1
CIRCUIT
1
MIN
OC
mW
OC
EN Pin Voltage
Power Dissipation SOT-26W
USP-6B Pd 100
250
V
mA700
VSS -0.3 ~ VIN +0.3
Output Current
Output Voltage
UNITSPARAMETER
Input Voltage
RATINGS
V6.5VIN
SYMBOL
S e m ic onduc tor Ltd.
Data Sheet 3
XC6401 Series
Dual LDO Regulators, Low ESR Cap. Compatible
Preliminary
!DROPOUT VOLTAGE
55 110 160
65 140 180
40 60 120 170
100 165 250
50 75 150 200
55
300 200 400
60 200 180 300
65
500 270 600
80 400 240 500
100
800
200 600 350 700
700 400
2.95 2.891 3.009
2.90 2.842 2.958
35
2.85 2.793 2.907
2.80 2.744 2.856
2.75 2.695 2.805
2.70 2.646 2.754
2.65 2.597 2.703
2.60 2.548 2.652
2.55 2.499 2.601
2.50 2.450 2.550
2.45 2.401 2.499
2.40 2.352 2.448
2.35 2.303 2.397
2.30 2.254 2.346
2.25 2.205 2.295
2.20 2.156 2.244
2.15 2.107 2.193
2.10 2.058 2.142
2.05 2.009 2.091
2.00 1.960 2.040
1.95 1.911 1.989
1.90 1.862 1.938 45
1.85 1.813 1.887
1.80 1.764 1.836
1.75 1.715 1.785
1.70 1.666 1.734
1.65 1.617 1.683
1.60 1.568 1.632
1.55 1.519 1.581
1.50 1.470 1.530
1.45 1.420 1.480
1.40 1.370 1.430
1.35 1.320 1.380
1.30 1.270 1.330
1.25 1.220 1.280
1.20 1.170 1.230
1.15 1.120 1.180
1.10 1.070 1.130
1.05 1.020 1.080
1.00 0.970 1.030
0.95 0.920 0.980
0.90 0.870 0.930
0.85 0.820 0.880 300
0.770 0.830
SETTING OUTPUT VOLTAGE
(V)
VOUT (T)
0.80
VOUT Vdif 1 Vdif 2
OUTPUT VOLTAGE
(V)
DROPOUT VOLTAGE 1
E-1 (mV)
DROPOUT VOLTAGE 2
E-2 (mV)
MIN. MAX. MIN. MAX. MIN. MAX.
S e m ic onduc tor Ltd.
Data Sheet 4
XC6401 Series
Dual LDO Regulators, Low ESR Cap. Compatible
Preliminary
!DROPOUT VOLTAGE
30
4.95 4.851 5.049
5.00 4.900 5.100
4.85 4.753 4.947
4.90 4.802 4.998
4.845
4.80 4.704 4.896
150
4.65 4.557 4.743
4.70 4.606 4.794
4.55
4.75 4.655
4.459 4.641
4.60 4.508 4.692
4.45 4.361 4.539
4.50 4.410 4.590
4.35 4.263 4.437
4.40 4.312 4.488
4.25 4.165 4.335
4.30 4.214 4.386
4.15 4.067 4.233
4.20 4.116 4.284
4.05 3.969 4.131
4.10 4.018 4.182
3.95 3.871 4.029
4.00 3.920 4.080
3.85 3.773 3.927
3.90 3.822 3.978
3.75 3.675 3.825
3.80 3.724 3.876
3.65 3.577 3.723
3.70 3.626 3.774
3.55 3.479 3.621
3.60 3.528 3.672
3.45 3.381 3.519
3.50 3.430 3.570
3.35 3.283 3.417
3.40 3.332 3.468
3.25 3.185 3.315
3.30 3.234 3.366
3.15 3.087 3.213
3.20 3.136 3.264
3.05 2.989 3.111
3.10 3.038 3.162
MAX.
3.00 2.940 3.060
VOUT (T) MIN. MAX. MIN.
45 100
SETTING OUTPUT VOLTAGE OUTPUT VOLTAGE DROPOUT VOLTAGE 1 DROPOUT VOLTAGE 2
(V) E-1 (mV) E-2 (mV)
(V) VOUT Vdif 1 Vdif 2
MAX. MIN.
S e m ic onduc tor Ltd.
Data Sheet 5
XC6401 Series
Dual LDO Regulators, Low ESR Cap. Compatible
Preliminary
!OPERATIONAL EXPLANATION
Output voltage control with the XC6401 series:
Low ESR Capacitors
Current Limiter, Short-Circuit Protection
EN Pins
!NOTE ON USE
1 Please use this IC within the stated absolute maximum ratings.
The IC is liable to malfunction should the ratings be exceeded.
2 Where wiring impedance is high, operations may become unstable due to noise and/or phase lag
depending on output current. Please keep the resistance low between VIN and VSS wiring in particular.
3 Please wire the input capacitor (CIN) and the output capacitors (CL1, CL2) as close to the IC as possible.
The IC's internal circuitry can be shutdown via the signal from the EN1 and EN2 pins with the XC6401 series. In shutdown mode, output at the
VOUT1 and VOUT2 pins will be pulled down to the VSS level via R11 & R12 and R21 & R22. The operational logic of the IC's EN1 and EN2
pins are selectable (please refer to the selection guide on page 2). Note that as the standard XC6401FF type's regulator 1 and 2 are both ' High
Active/No Pull Down', operations will become unstable with the EN1 or EN2 pins open. Although the EN1 and EN2 pins are equal to an inverter
input with CMOS hysteresis, with either the pull-up or pull-down options, the EN1 and EN2 pins input current will increase when the IC is in
operation. We suggest that you use this IC with either a VIN voltage or a VSS voltage input at the EN1 and EN2 pins. If this IC is used with the
correct specifications for the EN1 and EN2 pins, the operational logic is fixed and the IC will operate normally. However, supply current may
increase as a result of through current in the IC's internal circuitry.
The voltage divided by resistors R1 & R2 is compared with the internal reference voltage by the error amplifier. The P-Channel MOSFETs,
which are connected to the VOUT1 and VOUT2 pins, are then driven by the subsequent output signal. The output voltages at the VOUT1 and
VOUT2 pins are controlled and stabilized by a system of negative feedback. The current limit circuit and short protect circuit operate in relation
to the level of output current. Further, the IC's internal circuitry can be shutdown via the EN pin's signal.
With the XC6401 series, a stable output voltage is achievable even if used with low ESR capacitors as a phase compensation circuit is built-in.
In order to ensure the effectiveness of the phase compensation, we suggest that output capacitors (CL1, CL2) is connected as close as
possible to the output pins (VOUT1 and VOUT2) and the VSS pin. Please use an output capacitor with a capacitance value of at least 1µF. Also,
please connect an input capacitor (CIN) of 0.1µF between the VIN pin and the VSS pin in order to ensure a stable power input.
The XC6401 series includes a combination of a fixed current limiter circuit & a foldback circuit which aid the operations of the current limiter and
circuit protection. When the load current reaches the current limit level, the fixed current limiter circuit operates and output voltage drops. As a
result of this drop in output voltage, the foldback circuit operates, output voltage drops further and output current decreases. When the output
pin is shorted, a current of about 30mA flows.
Current
Limit
Error
A
m
p
1
ON/OFF
Control
VR1
Each
Circuit
VR2
Each
Circuit Voltage
Reference
VOUT1
EN1
EN2
VIN
VSS
R11
R12
R21
R22
VOUT2
+
-
ON/OFF
Control
Current
Limit
+
-
Error
A
m
p
2
S e m ic onduc tor Ltd.
Data Sheet 6
XC6401 Series
Dual LDO Regulators, Low ESR Cap. Compatible
Preliminary
!TEST CIRCUITS
Circuit 1
EN1/EN2 :
Active 'High' = EN=VIN
Active 'Low' = EN=VSS
Circuit 2
EN1/EN2 :
1. Active 'High' (Pull-down resistor built-in)
VR1 Supply Current ISS1=I1 (Note:EN1=ON, EN2=OFF)
VR2 Supply Current ISS2=I1 (Note:EN1=OFF, EN2=ON)
2. Active 'High' (Pull-down, no resistor built-in)
VR1 Supply Current ISS1=I1 (Note:EN1=ON, EN2=OFF)
VR2 Supply Current ISS2=I1 (Note:EN1=OFF, EN2=ON)
3. Active 'Low' (Pull-up resistor built-in)
VR1 Supply Current ISS1=I1+I2 (Note:EN1=ON, EN2=OFF)
VR2 Supply Current ISS2=I1+I3 (Note:EN1=OFF, EN2=ON)
4. Active 'Low' (Pull-up, no resistor built-in)
VR1 Supply Current ISS1=I1 (Note:EN1=ON, EN2=OFF)
VR2 Supply Current ISS2=I1 (Note:EN1=OFF, EN2=ON)
Circuit 3
EN1/EN2 :
Active 'High' = EN=VSS
Active 'Low' = EN=VIN
V
I
OUT2
CIN, CL1, CL2 : 1 µF(ceramic)
CL2
CL1 V
I
OUT1
CIN
V
IN
V
OUT1
V
OUT2
EN1
V
SS
EN2
RL1
V
RL2
A
A
A
AA
V
IN
I
OUT1
I
OUT2
V
IN
V
OUT1
V
OUT2
EN1
V
SS
EN2
A A
I
3
I
2
I
1
CL2
CL1, CL2 : 1µF(ceramic)
CL1
A
V
IN
V
IN
V
OUT1
V
OUT2
EN1
V
SS
EN2
S e m ic onduc tor Ltd.
Data Sheet 7
XC6401 Series
Dual LDO Regulators, Low ESR Cap. Compatible
Preliminary
!TEST CIRCUITS (Continued)
Circuit 4
Circuit 5
EN1/EN2 :
Active 'High' = EN=VIN
Active 'Low' = EN=VSS
VIN
VOUT1
VOUT2
EN1
VSS
EN2
AV
AV
VEN1
VEN2
CIN
CIN, CL 1, CL 2 : 1µF(ceramic )
IOUT1
IOUT2
CL2
CL1
I
OUT2
CL1, CL2 : 1µF(ceramic)
CL2
CL1 I
OUT1
V
IN
=[V
OUT
(T)+1.0]
V+0.5Vp-pAC
V
IN
V
OUT1
V
OUT2
EN1
V
SS
EN2
V
V
V
S e m ic onduc tor Ltd.
Data Sheet 8
XC6401 Series
Dual LDO Re
g
ulators, Low ESR Ca
p
. Com
p
atible
Preliminar
y
! TYPICAL PERFORMANCE CHARACTERISTICS
(
1
)
Out
p
ut Volta
g
e vs. Out
p
ut Current
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
0 50 100 150 200 250 300 350
Output Current IOUT (mA)
Output Voltage VOUT (V)
XC6401(2.85V)
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
0 50 100 150 200 250 300 350
Output Current IOUT (mA)
Output Voltage VOUT (V)
XC6401(2.85V)
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
0 50 100 150 200 250 300 350
Output Current IOUT (mA)
Output Voltage VOUT (V)
XC6401(3.0V)
0.0
0.2
0.4
0.6
0.8
1.0
0 50 100 150 200 250 300 350
Output Current IOUT (mA)
Output Voltage VOUT (V)
X
C6401
(
0.8
V
)
0.0
0.2
0.4
0.6
0.8
1.0
0 50 100 150 200 250 300 350
Output Current IOUT (mA)
Output Voltage VOUT (V)
XC6401
(
0.8V
)
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
0 50 100 150 200 250 300 350
Output Current IOUT (mA)
Output Voltage VOUT (V)
XC6401(3.0
V
)
VIN=1.8V
CIN=1uF (ceramics), CL=1uF (ceramics)
Topr = 85OC
= 25OC
= - 40OC
VIN=4.0V
CIN=1uF (ceramics), CL=1uF (ceramics)
VIN = 6.0V
= 1.8V
= 1.8V
= 1.5V
VIN=4.0V
CIN=1uF (ceramics), CL=1uF (ceramics)
VIN = 6.0V
= 4.0V
= 3.15V
VIN=3.85V
CIN=1uF (ceramics), CL=1uF (ceramics)
Topr = 85OC
= 25OC
= - 40OC
VIN=4.0V
CIN=1uF (ceramics), CL=1uF (ceramics)
VIN = 6.0V
= 4.0V
= 3..3V
VIN=4.0V
CIN=1uF (ceramics), CL=1uF (ceramics)
Topr = 85OC
= 25OC
= - 40OC
Sem ic onduc tor Ltd.
Data Sheet 9
XC6401 Series
Dual LDO Re
g
ulators, Low ESR Ca
p
. Com
p
atible
Preliminar
y
(
1
)
Out
p
ut Volta
g
e vs. Out
p
ut Current
(
Continued
)
(
2
)
Out
p
ut Volta
g
e vs. In
p
ut Volta
g
e
0.65
0.70
0.75
0.80
0.85
0.90
1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
Input Voltage VIN (V)
Output Voltage VOUT (V)
XC6401(0.8V)
2.70
2.75
2.80
2.85
2.90
2.95
3.0 3.5 4.0 4.5 5.0 5.5 6.0
Input Voltage VIN (V)
Output Voltage VOUT (V)
XC6401(2.85V)
2.05
2.25
2.45
2.65
2.85
3.05
2.35 2.85 3.35
Input Voltage VIN (V)
Output Voltage VOUT (V)
XC6401(2.85V)
0.0
1.0
2.0
3.0
4.0
5.0
6.0
0 50 100 150 200 250 300 350
Output Current IOUT (mA)
Output Voltage VOUT (V)
XC6401(5.0V)
0.0
1.0
2.0
3.0
4.0
5.0
6.0
0 50 100 150 200 250 300 350
Output Current IOUT (mA)
Output Voltage VOUT (V)
XC6401
(
5.0
V
)
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
0.5 1.0 1.5 2.0 2.5
Input Voltage VIN (V)
Output Voltage VOUT (V)
XC6401
(
0.8
V
)
VIN=6.0V
CIN=1uF (ceramics), CL=1uF (ceramics)
Topr = 85OC
= 25OC
= - 40OC
VIN = 6.0V
= 5.3V
VIN=4.0V
CIN=1uF (ceramics), CL=1uF (ceramics)
Topr = 25OC
CIN=1uF (ceramics), CL=1uF (ceramics)
IOUT = 0mA
= 30mA
= 100mA
Topr = 25OC
CIN=1uF (ceramics), CL=1uF (ceramics)
IOUT = 0mA
= 30mA
= 100mA
Topr = 25OC
CIN=1uF (ceramics), CL=1uF (ceramics)
IOUT = 0mA
= 30mA
= 100mA
Topr = 25OC
CIN=1uF (ceramics), CL=1uF (ceramics)
IOUT = 0mA
= 30mA
= 100mA
S e m i c ond uc tor Ltd.
Data Sheet 10
XC6401 Series
Dual LDO Re
g
ulators, Low ESR Ca
p
. Com
p
atible
Preliminar
y
(
2
)
Out
p
ut Volta
g
e vs. In
p
ut Volta
g
e
(
Continued
)
(
3
)
Dro
p
out Volta
g
e vs. Out
p
ut Current
4.85
4.90
4.95
5.00
5.05
5.10
5.5 6.0
Input Voltage VIN (V)
Output Voltage VOUT (V)
X
C6401(5.0
V
)
2.85
2.90
2.95
3.00
3.05
3.10
3.5 4.0 4.5 5.0 5.5 6.0
Input Voltage VIN (V)
Output Voltage VOUT (V)
XC6401(3.0V)
0.0
0.1
0.2
0.3
0.4
0.5
0 50 100 150 200
Output Current IOUT (mA)
Dropout Voltage Vdif (V)
XC6401(2.85V)
2.2
2.4
2.6
2.8
3.0
3.2
2.5 3.0 3.5
Input Voltage VIN (V)
Output Voltage VOUT (V)
XC6401(3.0V)
4.2
4.4
4.6
4.8
5.0
5.2
4.5 5.0 5.5
Input Voltage VIN (V)
Output Voltage VOUT (V)
XC6401(5.0V)
0.0
0.2
0.4
0.6
0.8
1.0
0 50 100 150 200
Output Current IOUT (mA)
Dropout Voltage Vdif (V)
XC6401(0.8V)
Topr = 25OC
CIN=1uF (ceramics), CL=1uF (ceramics)
IOUT = 0mA
= 30mA
= 100mA
Topr = 25OC
CIN=1uF (ceramics), CL=1uF (ceramics)
IOUT = 0mA
= 30mA
= 100mA
IOUT = 0mA
= 30mA
= 100mA
Topr = 25OC
CIN=1uF (ceramics), CL=1uF (ceramics)
IOUT = 0mA
= 30mA
= 100mA
CIN=1uF (ceramics), CL=1uF (ceramics)
Topr = 85OC
= 25OC
= - 40OC
CIN=1uF (ceramics), CL=1uF (ceramics)
Topr = 85OC
= 25OC
= - 40OC
Sem ic onduc tor Ltd.
Data Sheet 11
XC6401 Series
Dual LDO Re
g
ulators, Low ESR Ca
p
. Com
p
atible
Preliminar
y
(
3
)
Dro
p
out Volta
g
e vs. Out
p
ut Current
(
Continued
)
0
20
40
60
80
100
0123456
Intput Voltage VIN (V)
Supply Current ISS (uA)
XC6401(2.85V)
0
20
40
60
80
100
0123456
Input Voltage VIN (V)
Supply Current ISS (uA)
XC6401(5.0V)
0
20
40
60
80
100
0123456
Input Voltage VIN (V)
Supply Current ISS (uA)
XC6401(3.0V)
0
20
40
60
80
100
0123456
Input Voltage VIN (V)
Supply Current ISS (uA)
XC6401(0.8V)
0.0
0.1
0.2
0.3
0.4
0.5
0 50 100 150 200
Output Current IOUT (mA)
Dropout Voltage Vdif (V)
XC6401(3.0V)
0.0
0.1
0.2
0.3
0.4
0.5
0 50 100 150 200
Output Current IOUT (mA)
Dropout Voltage Vdif (V)
XC6401(5.0V)
CIN=1uF (ceramics), CL=1uF (ceramics)
Topr = 85OC
= 25OC
= - 40OC
CIN=1uF (ceramics), CL=1uF (ceramics)
Topr = 85OC
= 25OC
= - 40OC
Topr = 85OC
= 25OC
= - 40OC
Topr = 85OC
= 25OC
= - 40OC
Topr = 85OC
= 25OC
= - 40OC
Topr = 85OC
= 25OC
= - 40OC
S e m i c ond uc tor Ltd.
Data Sheet 12
XC6401 Series
Dual LDO Re
g
ulators, Low ESR Ca
p
. Com
p
atible
Preliminar
y
(
5
)
Out
p
ut Volta
g
e vs. Ambient Tem
p
erature
(
6
)
Su
pp
l
y
Current vs. Ambient Tem
p
erature
20
22
24
26
28
30
-50 -25 0 25 50 75 100
Ambient Temperature Topr (OC)
Output Voltage VOUT (V)
XC6401(2.85V)
2.75
2.80
2.85
2.90
2.95
-50 -25 0 25 50 75 100
Ambient Temperature Topr (OC)
Output Voltage VOUT (V)
XC6401(2.85V)
20
22
24
26
28
30
-50 -25 0 25 50 75 100
Ambient Temperature Topr (OC)
Output Voltage VOUT (V)
XC6401(0.8V)
4.80
4.90
5.00
5.10
5.20
-50 -25 0 25 50 75 100
Ambient Temperature Topr (OC)
Output Voltage VOUT (V)
X
C6401
(
5.0
V
)
2.90
2.95
3.00
3.05
3.10
-50 -25 0 25 50 75 100
Ambient Temperature Topr (OC)
Output Voltage VOUT (V)
XC6401(3.0V)
0.76
0.78
0.80
0.82
0.84
-50 -25 0 25 50 75 100
Ambient Temperature Topr (OC)
Output Voltage VOUT (V)
XC6401(0.8V)
VIN = 3.85V
VIN = 4.0V
CIN=1uF (ceramics), CL=1uF (ceramics)
IOUT = 0mA
= 10mA
= 30mA
= 100mA
VIN = 1.8V
CIN=1uF (ceramics), CL=1uF (ceramics)
IOUT = 0mA
= 10mA
= 30mA
= 100mA
VIN = 5.0V
CIN=1uF (ceramics), CL=1uF (ceramics)
IOUT = 0mA
= 10mA
= 30mA
= 100mA
VIN = 4.0V
CIN=1uF (ceramics), CL=1uF (ceramics)
IOUT = 0mA
= 10mA
= 30mA
= 100mA
VIN = 1.8V
Sem ic onduc tor Ltd.
Data Sheet 13
XC6401 Series
Dual LDO Re
g
ulators, Low ESR Ca
p
. Com
p
atible
Preliminar
y
(
6
)
Su
pp
l
y
Current vs. Ambient Tem
p
erature
(
Continued
)
20
22
24
26
28
30
-50 -25 0 25 50 75 100
Ambient Temperature Topr (OC)
Output Voltage VOUT (V)
XC6401(5.0V)
20
22
24
26
28
30
-50 -25 0 25 50 75 100
Ambient Temperature Topr (OC)
Output Voltage VOUT (V)
XC6401(3.0V)
VIN = 4.0V VIN = 6.0V
Sem ic onduc tor Ltd.
Data Sheet 14
XC6401 Series
Dual LDO Re
g
ulators, Low ESR Ca
p
. Com
p
atible
Preliminar
y
(
7
)
In
p
ut Transient Res
p
onse
2.75
2.80
2.85
2.90
2.95
3.00
3.05
Time (40usec/div)
Output Voltage VOUT (V)
0
1
2
3
4
5
6
Input Voltage VIN (V)
XC6401(2.85V)
2.75
2.80
2.85
2.90
2.95
3.00
3.05
Time (40usec/div)
Output Voltage VOUT (V)
0
1
2
3
4
5
6
Input Voltage VIN (V)
XC6401(2.85V)
2.75
2.80
2.85
2.90
2.95
3.00
3.05
Time (200usec/div)
Output Voltage VOUT (V)
0
1
2
3
4
5
6
Input Voltage VIN (V)
XC6401(2.85V)
0.70
0.75
0.80
0.85
0.90
0.95
1.00
Time (40usec/div)
Output Voltage VOUT (V)
-2
-1
0
1
2
3
4
Input Voltage VIN (V)
XC6401(0.8V)
0.70
0.75
0.80
0.85
0.90
0.95
1.00
Time (40usec/div)
Output Voltage VOUT (V)
-2
-1
0
1
2
3
4
Input Voltage VIN (V)
XC6401(0.8V)
0.70
0.75
0.80
0.85
0.90
0.95
1.00
Time (200usec/div)
Output Voltage VOUT (V)
-2
-1
0
1
2
3
4
Input Voltage VIN (V)
XC6401(0.8V)tr=tf=5use
CL=1uF (ceramics), IOUT=100uA
Input Voltage
Output Voltage
tr=tf=5use
CL=1uF (ceramics), IOUT=30mA
Output Voltage
Input Voltage
tr=tf=5use
CL=1uF (ceramics), IOUT=100mA
Input Voltage
Output Voltage
tr=tf=5use
CL=1uF (ceramics), IOUT=100uA
Input Voltage
Output Voltage
tr=tf=5use
CL=1uF (ceramics), IOUT=100mA
tr=tf=5use
CL=1uF (ceramics), IOUT=30mA
Output Voltage
Input Voltage Input Voltage
Output Voltage
Sem ic onduc tor Ltd.
Data Sheet 15
XC6401 Series
Dual LDO Re
g
ulators, Low ESR Ca
p
. Com
p
atible
Preliminar
y
(
7
)
In
p
ut Transient Res
p
onse
(
Continued
)
4.90
4.95
5.00
5.05
5.10
5.15
5.20
Time (40usec/div)
Output Voltage VOUT (V)
2
3
4
5
6
7
8
Input Voltage VIN (V)
XC6401(5.0V)
4.90
4.95
5.00
5.05
5.10
5.15
5.20
Time (40usec/div)
Output Voltage VOUT (V)
2
3
4
5
6
7
8
Input Voltage VIN (V)
XC6401(5.0V)
4.90
4.95
5.00
5.05
5.10
5.15
5.20
Time (200usec/div)
Output Voltage VOUT (V)
2
3
4
5
6
7
8
Input Voltage VIN (V)
XC6401(5.0V)
2.90
2.95
3.00
3.05
3.10
3.15
3.20
Time (40usec/div)
Output Voltage VOUT (V)
0
1
2
3
4
5
6
Input Voltage VIN (V)
XC6401(3.0V)
2.90
2.95
3.00
3.05
3.10
3.15
3.20
Time (40usec/div)
Input Voltage VIN (V)
0
1
2
3
4
5
6
Input Voltage VIN (V)
X
C6401(3.0
V
)
2.90
2.95
3.00
3.05
3.10
3.15
3.20
Time (200usec/div)
Output Voltage VOUT (V)
0
1
2
3
4
5
6
Input Voltage VIN (V)
XC6401(3.0V) tr=tf=5use
CL=1uF (ceramics), IOUT=100uA
Input Voltage
Output Voltage
tr=tf=5use
CL=1uF (ceramics), IOUT=30mA
Input Voltage
Output Voltage
tr=tf=5use
CL=1uF (ceramics), IOUT=100uA
tr=tf=5use
CL=1uF (ceramics), IOUT=100mA
Output Voltage
Output Voltage
Input Voltage
Input Voltage
tr=tf=5use
CL=1uF (ceramics), IOUT=30mA tr=tf=5use
CL=1uF (ceramics), IOUT=100mA
Input Voltage
Input Voltage
Output Voltage Output Voltage
Sem ic onduc tor Ltd.
Data Sheet 16
XC6401 Series
Dual LDO Re
g
ulators, Low ESR Ca
p
. Com
p
atible
Preliminar
y
(
8
)
Load Transient Res
p
onse
2.45
2.55
2.65
2.75
2.85
2.95
Time (40usec/div)
Output Voltage VOUT (V)
0
50
100
150
200
250
Output Current IOUT (mA)
10mA
100mA
X
C6401
(
2.85V
)
2.45
2.55
2.65
2.75
2.85
2.95
Time (40usec/div)
Output Voltage VOUT (V)
0
50
100
150
200
250
Output Current IOUT (mA)
10mA
50mA
XC6401(2.85V)
2.60
2.70
2.80
2.90
3.00
3.10
Time (40usec/div)
Output Voltage VOUT (V)
0
50
100
150
200
250
Output Current IOUT (mA)
10mA
100mA
XC6401(3.0V)
2.60
2.70
2.80
2.90
3.00
3.10
Time (40usec/div)
Output Voltage VOUT (V)
0
50
100
150
200
250
Output Current IOUT (mA)
10mA
50mA
XC6401(3.0V)
0.40
0.50
0.60
0.70
0.80
0.90
Time (40usec/div)
Output Voltage VOUT (V)
0
50
100
150
200
250
Output Current IOUT (mA)
10mA
100mA
XC6401(0.8V)
0.40
0.50
0.60
0.70
0.80
0.90
Time (40usec/div)
Output Voltage VOUT (V)
0
50
100
150
200
250
Output Current IOUT (mA)
10mA
50mA
XC6401(0.8V)
VIN=1.8V, tr=tf=5use
CIN=CL=1uF (ceramics)
Output Current
Output Voltage
VIN=1.8V, tr=tf=5use
CIN=CL=1uF (ceramics)
Output Voltage
Output Current
VIN=4.0V, tr=tf=5use
CIN=CL=1uF (ceramics) VIN=4.0V, tr=tf=5use
CIN=CL=1uF (ceramics)
Output Current
Output Voltage Output Voltage
Output Current
VIN=4.0V, tr=tf=5use
CIN=CL=1uF (ceramics)
VIN=4.0V, tr=tf=5use
CIN=CL=1uF (ceramics)
Output Current
Output Voltage
Output Current
Output Voltage
S e m i c onductor Ltd.
Data Sheet 17
XC6401 Series
Dual LDO Re
g
ulators, Low ESR Ca
p
. Com
p
atible
Preliminar
y
(
8
)
Load Transient Res
p
onse
(
Continued
)
4.60
4.70
4.80
4.90
5.00
5.10
Time (40usec/div)
Output Voltage VOUT (V)
0
50
100
150
200
250
Output Current IOUT (mA)
10mA
100mA
X
C6401(5.0
V
)
4.60
4.70
4.80
4.90
5.00
5.10
Time (40usec/div)
Output Voltage VOUT (V)
0
50
100
150
200
250
Output Current IOUT (mA)
10mA
50mA
XC6401
(
5.0
V
)
VIN=6.0V, tr=tf=5use
CIN=CL=1uF (ceramics) VIN=6.0V, tr=tf=5use
CIN=CL=1uF (ceramics)
Output Voltage Output Voltage
Output Current Output Current
Sem ic onduc tor Ltd.
Data Sheet 18
XC6401 Series
Dual LDO Re
g
ulators, Low ESR Ca
p
. Com
p
atible
Preliminar
y
(
9
)
Ri
pp
le Re
j
ection Rate
(
10
)
Cross Talk
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)
XC6401(5.0V)
0
20
40
60
80
0.01 0.1 1 10 100
Ripple Frequency f (kHz)
Ripple Rejection Rate RR (dB)
XC6401(3.0V)
0
20
40
60
80
0.01 0.1 1 10 100
Ripple Frequency f (kHz)
Ripple Rejection Rate RR (dB)
XC6401(0.8V)
0
20
40
60
80
0.01 0.1 1 10 100
Ripple Frequency f (kHz)
Ripple Rejection Rate RR (dB)
XC6401(2.85V)
0
20
40
60
80
0.01 0.1 1 10 100
Ripple Frequency f (kHz)
Ripple Rejection Rate RR (dB)
VIN=5.75V DC+0.5Vp-pAC
IOUT=30mA, CL=1uF (ceramics)
VIN=1.8V DC+0.5Vp-pAC
IOUT=30mA, CL=1uF (ceramics) VIN=3.85V DC+0.5Vp-pAC
IOUT=30mA, CL=1uF (ceramics)
VIN=4.0V DC+0.5Vp-pAC
IOUT=30mA, CL=1uF (ceramics)
VIN=4.0V, CIN= CL=1uF (ceramics)
VR1 Out
p
ut Volta
g
e
(
3.0V
)
VR2 Out
p
ut Volta
g
e
(
2.85V
)
VR1 Out
p
ut Current
S e m i c onductor Ltd.
Data Sheet 19
