XC6421
Series
■GENERAL
DESCRIPTION
ETR03053-005
300mA Small High Speed Dual LDO Regulator, Built-in Inrush Current Protection
The XC6421 series is an ultra small CMOS dual LDO regulator, mounting 300mA 2-channel small high speed LDO.
The series features high accuracy, high ripple rejection and low dropout voltage.
The series is capable of high density board installation by the ultra small package of two low on-resistance regulators. Both
output accuracies are ±1% by laser trimming.
Each regulator can be turned off independently to be in stand-by mode by controlling EN pin.
In this state, the electric charge at the output capacitor (C
L
) is discharged via the internal auto-discharge switch, and as a result
the V
OUT
voltage quickly returns to the V
SS
level.
The output stabilization capacitor (C
L
) is also compatible with low ESR ceramic capacitors.
The high level of output stability is maintained even during frequent load fluctuations, due to the excellent transient response
performance.
Over current protection circuit and over heat protection circuit are mounted, these circuits start working when output current
reaches junction temperature or limit current.
The two regulators are completely isolated so that a cross talk during load fluctuations is minimized
■APPLICATIONS
●
Smart phones / Mobile phones
●
Portable game consoles
●
Digital audio equipments
●
Digital still cameras / Camcorders
■FEATURES
Maximum Output Current
Operating Voltage Range
Output Voltages
Output Accuracy
Dropout Voltage
Low Power Consumption
Stand-by Current
Ripple Rejection
ON/OFF Control
Protection
:
:
:
:
:
:
:
:
:
300mA
1.6V∼5.5V
1.2V∼3.6V (0.05V increments)
±1% (V
OUT
≧2.00V)
±20mV(V
OUT
≦1.95V)
210mV@I
OUT
=300mA
（V
OUT
=3.0V）
90μA / ch (TYP.)
0.1μA
75dB@1kHz
Active High
C
L
Discharge
Current Limit 450mA (TYP.)
Short Circuit 125mA (TYP.)
Inrush Current Protection
Thermal Shutdown
1.0μF Ceramic Capacitor
-40℃
∼
+85℃
USP-6C
EU RoHS Compliant, Pb Free
Low ESR Capacitor
Operating Ambient Temperature
Package
Environmentally Friendly
:
:
:
:
■TYPICAL
APPLICATION CIRCUITS
■
TYPICAL PERFORMANCE
CHARACTERISTICS
XC6421(V
OUT
=1.8V)
100
80
60
40
20
0
0.1
1
10
100
1000
Ripple Frequency : f (kHz)
V
IN
=3.0V+0.5V
p- pAC
, Ta=25℃
C
IN
=0.1μF(ceramic), C
L
=1.0μF(ceramic)
Ripple Rejection : RR (dB)
IOUT=0.1mA
IOUT=1mA
IOUT=30mA
IOUT=100mA
1/25
XC6421
Series
■
PRODUCT CLASSIFICATION
●Ordering
Information
XC6421①②③④⑤⑥-⑦
(*1)
DESIGNATOR
ITEM
SYMBOL
DESCRIPTION
EN1: Active High , EN2: Active High
Built-in Thermal Shutdown
Inrush Current Protection
V
OUT1
: C
L
Discharge, V
OUT2
: C
L
Discharge
EN1: With Pull-down
See the chart below
USP-6C (3,000/Reel)
EN2: With Pull-down
①
Basic Function
A
②
③④
⑤⑥-⑦
(*1)
Enable Pin
Output Voltage
Package (Order Unit)
B
01∼
ER-G
The “-G” suffix denotes Halogen and Antimony free as well as being fully EU RoHS compliant.
DESIGNATOR
③④:
Output Voltage
③④
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
VR1(V)
1.20
1.20
1.20
1.20
1.20
1.20
1.50
1.50
1.50
1.50
1.50
1.50
1.80
1.80
2.85
1.80
1.80
3.00
1.80
2.50
2.50
2.50
3.30
2.50
2.50
2.85
2.85
3.00
1.20
1.30
1.50
1.80
2.80
VR2(V)
1.20
1.50
2.50
2.85
3.00
3.30
1.50
1.80
2.50
2.85
3.00
3.30
1.80
2.50
2.85
2.85
3.00
1.80
3.30
2.50
2.80
2.85
1.50
3.00
3.30
3.00
3.30
3.00
1.80
2.80
2.80
2.80
2.80
③④
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
VR1(V)
2.80
2.80
1.20
3.60
1.20
3.30
3.00
3.30
1.30
2.60
3.10
1.50
2.60
3.40
2.85
3.30
1.80
3.10
1.50
3.30
3.00
3.30
3.60
3.30
3.10
3.10
3.10
3.00
3.00
1.80
1.80
1.70
VR2(V)
3.00
3.30
3.60
1.20
2.80
2.00
3.30
3.30
1.50
2.80
3.30
2.60
3.30
3.40
2.60
1.80
1.20
3.10
3.10
2.80
2.80
3.00
3.60
3.10
3.00
2.90
2.50
2.90
2.50
1.90
1.85
1.70
*For other output voltage combinations, please contact your local Torex sales office or representative.
3/25
XC6421
Series
■BLOCK
DIAGRAM
* Diodes inside the circuits are ESD protection diodes and parasitic diodes.
■ABSOLUTE
MAXIMUM RATINGS
PARAMETER
Input Voltage
Output Current
Output Voltage 1, Output Voltage2
EN1, EN2 Input Voltage
Power Dissipation
USP-6C
SYMBOL
V
IN
I
OUT1
+I
OUT2
V
OUT1,
V
OUT2
V
EN1,
V
EN2
Pd
Topr
Tstg
RATINGS
Vss-0.3∼Vss +7.0
800
(*1)
UNITS
V
mA
V
V
mW
℃
℃
V
SS
-0.3∼V
IN
+0.3≦Vss +7.0
V
SS
-0.3∼Vss +7.0
120
1000 (PCB mounted)
(*2)
-40∼+85
-55∼+125
Operating Ambient Temperature
Storage Temperature
(*1)
(*2)
Pd > { (V
IN
-V
OUT1
)×I
OUT1
+ (V
IN
-V
OUT2
)×I
OUT2
}
The power dissipation figure shown is PCB mounted.
Please refer to page 23 for details.
4/25
XC6421
Series
■ELECTRICAL
CHARACTERISTICS
●XC6421
Series
Regulator 1, Regulator 2
PARAMETER
SYMBOL
Ta=25℃
CONDITIONS
V
OUT
≧2.0V,
V
EN
=V
IN
, I
OUT
=10mA
MIN.
V
OUT(T)
×0.99
(*2)
TYP.
V
OUT(T)
V
OUT(T)
-
25
See the chart below
90
0.01
(*3)
MAX.
V
OUT(T)
×1.01
(*2)
UNITS
V
V
mA
mV
mV
μA
μA
CIRCUITS
①
①
①
①
①
②
②
Output Voltage
V
OUT(E)
(*2)
V
OUT
＜2.0V,
V
EN
=V
IN
, I
OUT
=10mA
Maximum Output Current
Load Regulation
Dropout Voltage
(*4)
V
OUT(T)
½
20mV
300
-
-
(*2)
(*3)
V
OUT(T)
+20mV
-
45
190
0.1
(*2)
I
OUTMAX
ΔV
OUT
Vdif
I
SS
I
STB
V
EN
=V
IN
V
EN
=V
IN
, 0.1mA≦I
OUT
≦300mA
I
OUT
=300mA, V
EN
=V
IN
V
EN
=V
IN
, I
OUT
=0mA
V
EN
=V
SS
2.5V≦V
IN
≦5.5V,
（V
OUT(T)
≦2.0V）,
Supply Current
Stand-by Current
Line Regulation
ΔV
OUT
/
(ΔV
IN
・V
OUT
)
V
EN
=V
IN
, I
OUT
=30mA
V
OUT(T)
+0.5V≦V
IN
≦5.5V,
（V
OUT(T)
≧2.05V）,
V
EN
=V
IN
, I
OUT
=30mA
-
0.02
0.1
%/V
①
Input Voltage
Output Voltage
Temperature
Characteristics
(R&D Value)
Power Supply Rejection
Ratio
Limit Current
Short-Circuit Current
EN”H”Level Voltage
EN”L”Level Voltage
EN”H”Level Current
EN”L”Level Current
C
L
Discharge Resistance
Inrush Current
Thermal Shutdown Detect
Temperature
Thermal Shutdown
Release Temperature
Thermal Shutdown
Release Temperature
V
IN
ΔV
OUT
/
(ΔTa・V
OUT
)
-
V
EN
=V
IN
, I
OUT
=10mA,
-40℃≦Ta≦85℃
V
EN=
V
IN
,
V
IN
=½V
OUT(T)
+1.0½+0.5Vp-pAC
I
OUT
=30mA, f=1kHz
V
EN
=V
IN
V
EN
=V
IN
, V
OUT
=V
SS
-
-
V
EN
=V
IN
=5.5V
V
EN
=V
SS
V
IN
=5.5V, V
EN
=V
SS
,
V
OUT
=2.0V
-
Junction Temperature
Junction Temperature
Junction Temperature
1.6
-
5.5
V
①
-
±100
-
ppm /℃
①
PSRR
I
LIM
I
SHORT
V
ENH
V
ENL
I
ENH
I
ENL
R
DCHG
I
RUSH
T
TSD
T
TSR
T
TSD
−T
TSR
-
310
-
1.0
0
2.9
-0.1
-
-
-
-
-
75
450
125
-
-
6.0
-
230
150
150
125
25
-
-
-
5.5
0.3
9.5
0.1
-
-
-
-
-
dB
mA
mA
V
V
μA
μA
Ω
mA
℃
℃
℃
③
①
①
①
①
①
①
①
①
①
①
①
NOTE:
Unless otherwise stated, {V
IN
=V
OUT(T)
+1.0V}
Each channel is measured when the other channel is turned off (V
EN
=V
SS
).
（*1）V
OUT(E)
: Effective output voltage (see the voltage chart)
(ie. The output voltage when “V
OUT(T)
+1.0V” is provided at the V
IN
pin while maintaining a certain I
OUT
value.
（*2）Characteristics
of the actual V
OUT(E)
by nominal output voltage is shown in the voltage chart.
（*3）V
OUT(T)
: Nominal output voltage
（*4）Vdif＝{V
IN1
−V
OUT1
}
V
OUT1
: A voltage equal to 98% of the output voltage whenever an amply stabilized {V
OUT(T)
+1.0V} is input with every I
OUT
.
V
IN1
: The input voltage when V
OUT1
appears as input voltage is gradually decreased.
5/25
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