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XC6411/XC6412 Series
ETR0320_010
0.8μA Low Power Consumption Dual Voltage Regulator
GENERAL DESCRIPTION
The XC6411/XC6412 series is a dual LDO regulator manufactured using CMOS process. The series achieves very low
supply current 0.8μA typical by channel and consists of a reference voltage source, an error amplifier, a current foldback
circuit, and a phase compensation circuit plus a driver transistor. The XC6411P series in SOT-25 packages, the XC6412B
series in SOT-26 packages make high density mounting possible. Therefore, the series is ideally suited for applications
where high density mounting is required such as mobile equipment.
Each output voltage of two regulators VR1 and VR2 is selectable in 0.1V increments within a range of 0.9V to 5.0Vby laser
trimming. The series is compatible with low ESR ceramic capacitors, which provides stable outputs. The VR1 and VR2 are
completely isolated so that a cross talk during load fluctuation is minimized. The current limiter's foldback circuit also operates
as a short protection for the output pin.
■APPLICATIONS
●MP3 players, Portable AV equipment
●Mobile phones
●Cordless phones,
Wireless communication equipment
●Portable games
●Cameras, Video recorders
●PDAs
TYPICAL APPLICATION CIRCUIT
FEATURES
Maximum Output Current : 200mA (300mA Limit TYP.)
@ V
Dropout Voltage : 320mV @ I
@ V
OUT=3.0V, VIN=4.0V
OUT = 100mA
OUT = 3.0V
Input V oltage Range : 1.5V ~ 6.0V
Output Voltage Range : 0.9V ~ 5.0V (0.1V increments)
Highly Accurate :±2% (1.5＜V
±0.03V (0.9≦V
OUT(T)
OUT(T)
≦5.0V)
≦1.5V)
Low Power Consumption : 0.8μA / ch.(TYP.)
Operating Temperature Range : - 40℃~ 85℃
Low ESR Capacitor Compatible : Ceramic capacitor
Current Limiter Circuit Built-In
Small Packages : SOT-25 (XC6411P)
: SOT-26 (XC6412B)
TYPICAL PERFORMANCE
CHARACTERISTICS
●Supply Current vs. Input Voltage
VR1/VR2: 3.0V
CIN=1.0μF(ceram ic),CL=0 .1μ F(ceram ic)
(μA)
SS
1.4
1.2
1.0
0.8
XC6412
series
0.6
0.4
Supply Current I
0.2
0.0
0123456
Input Voltage V IN (V)
Ta=-40
Ta=25
Ta=85
℃
℃
℃
1/28
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XC6411/XC6412 Series
PIN CONFIGURATION
PIN ASSIGNMENT
PIN NUMBER
XC6411
1 4 VOUT2 Output 2
2 5 VSS Ground
3 6 VOUT1 Output 1
- 1 VIN Power Input
4 - VIN1 Power Input 1
5 - VIN2 Power Input 2
- 3 EN2 ON / Off Switch (ch. 2)
- 2 NC No Connection
* When using an SOT-26 package for the XC6412B series, please note that No. 1 pin is common input voltage.
PRODUCT CLASSIFICATION
●Ordering Information
XC6411P①②③④⑤
XC6412B①②③④⑤
DESIGNATOR DESCRIPTION SYMBOL DESCRIPTION
①②③ Output Voltage 001~
XC6411P series
SOT-25
（TOP VIEW）
XC6412B
(SOT-26)
XC6412B series
SOT-26
（TOP VIEW）
PIN NAME FUNCTION
: Serial number for VR1 and VR2 voltage combination
Factory set range: 0.9~5.0V (0.1V increments)
④ Package M
: SOT-25 (XC6411P)
: SOT-26 (XC6412B)
R : Embossed tape, standard feed
⑤ Device Orientation
L : Embossed tape, reverse feed
2/28
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A
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BLOCK DIAGRAMS
●XC6411P Series ●XC6412B Series (SOT-26)
V
IN1
Current
Limit1
+
-
Voltage
Reference1
R11
R12
VOU T1
VIN
Current
Limit1
+
-
Voltage
Reference1
R11
R12
V
IN2
Current
Limit2
+
-
Voltage
Reference2
R21
R22
VOUT2
VSS
EN2
Current
Limit2
ON/OFF
Control
VR2 Each Circuit
+
-
Voltage
Reference2
R21
R22
* Diodes shown in the above circuit are ESD protection diodes and parasitic diodes.
、
BSOLUTE MAXIMUM RATINGS
PAR AMETER SYMBOL RATINGS UNITS
Input Voltage VIN - 0.3 ~ + 7.0 V
Input Voltage 1 VIN1 - 0.3 ~ + 7.0 V
Input Voltage 2 VIN2 - 0.3 ~ + 7.0 V
Output Current 1 IOUT1 500 (*1) mA
Output Current 2 IOUT2 500 (*1) mA
Output Voltage 1 VOUT1 VSS - 0.3 ~ VIN + 0.3 V
Output Voltage 2 VOUT2 VSS - 0.3 ~ VIN + 0.3 V
EN2 Pin Voltage VEN2 VSS - 0.3 ~ 0.7 V
Power Dissipation
SOT-25
SOT-26
Pd 250 mW
Operating Temperature Range Topr - 40 ~ + 85 ℃
Storage Temperature Range Tstg - 55 ~ +125 ℃
Note: *1: Please use the XC6411P (SOT-25) series withfollowing to the equation;
Pd>[(V
IN1-VOUT1)xIOUT1+(VIN2-VOUT2)xIOUT2]
Please use the XC6412B (SOT-26) series withfollowing to the equation;
Pd>[(V
IN-VOUT1)xIOUT1+(VIN-VOUT2)xIOUT2]
VOU T1
VOU T2
VSS
Ta = 2 5℃
XC6411/XC6412
Series
3/28
℃
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XC6411/XC6412 Series
ELECTRICAL CHARACTERISTICS
XC6411P/XC6412 Series, Regulator 1 and Regulator 2
PAR AMETER SYMBOL CONDITIONS MIN. TYP. MAX. UNITS
Output Voltage (*2) VOUT(E)
Maximum
Output Current
I
OUTMAX
V
IN=VOUT(T) (*1) + 1.0V,
I
OUT=1mA
VIN=VOUT(T) + 1.0V
V
OUT(T)=0.9V
VIN=VOUT(T) + 1.0V
V
OUT(T)=1.0V ~ 1.1V
VIN=VOUT(T) + 1.0V
OUT(T)=1.2V ~ 1.3V
V
VIN=VOUT(T) + 1.0V
V
OUT(T)=1.4V ~ 1.6V
VIN=VOUT(T) + 1.0V
V
OUT(T)=1.7V ~ 2.2V
VIN=VOUT(T) + 1.0V
OUT(T)=2.3V ~ 2.9V
V
V
IN=VOUT(T) + 1.0V
V
OUT(T)≧3.0V
VIN=VOUT(T) + 1.0V,
V
OUT(T) = 0.9V
1mA≦I
OUT≦50mA
E-0 (*6) V ①
50 70 -
60 80 -
80 110 -
100 140 -
120 150 -
150 195 -
200 300 -
Ta = 2 5
CIRCUIT
mA ①
Load Regulation VOUT
Dropout Voltage (*3) Vdif
VOUT /
V
Line Regulation
IN z VOUT
VIN=VOUT(T) + 1.0V
V
OUT(T) =1.0V ~ 1.1V
1mA≦I
OUT≦60mA
VIN=VOUT(T) + 1.0V
OUT(T) =1.2V~1.3V
V
1mA≦I
OUT≦80mA
VIN=VOUT(T) + 1.0V
V
OUT(T)≧1.4V
1mA≦I
OUT≦100mA
VOUT(T) =0.9V,
I
OUT =50mA
VOUT(T) =1.0V ~ 1.1V,
I
OUT =60mA
VOUT(T) =1.2V ~ 1.3V,
OUT =80mA
I
V
OUT(T)≧1.4V,
I
OUT =100mA
VOUT(T) =0.9V,
1.5V≦V
IN≦6.0V,
OUT =1mA
I
VOUT(T) =1.0V~1.2V,
V
OUT(T) +0.5V≦VIN≦6.0V
I
OUT =1mA
V
OUT(T) ≧1.3V,
OUT(T) +0.5V≦VIN≦6.0V
V
I
OUT =30mA
- 15 70 mV 1
E-1(*6) mV 1
- 0.05 0.15 %/V ①
Input Voltage VIN - 1.5 - 6.0 V -
Output Voltage
Temperature Characteristics
4/28
V
Topr
OUT /
z VOUT
V
IN= VOUT(T) +1.0V,
OUT =30mA,
I
- 40℃<
Topr < 85℃
- ±100 -
ppm /
℃
①
℃
■
ELECTRICAL CHARACTERISTICS (Continued)
XC6411P/XC6412 Series, Regulator 1 and Regulator 2 (Continued)
PAR AMETER SYMBOL CONDITIONS MIN. TYP. MAX. UNITS
VOUT=VOUT(E)×0.95
OUT(T)=0.9V
V
VIN=VOUT(T)+2.0V
VOUT=VOUT(E)×0.95
VOUT(T)=1.0V ~ 1.1V
IN=VOUT(T)+2.0V
V
VOUT=VOUT(E)×0.95
Current Limit ILIM
VOUT(T)=1.2V ~ 1.3V
VIN=VOUT(T)+2.0V
VOUT=VOUT(E)×0.95
VOUT(T)=1.4V ~ 2.9V
VIN=VOUT(T)+2.0V
OUT=VOUT(E)×0.95
V
VOUT(T)≧3.0V
VIN=VOUT(T)+1.0V
IN=VOUT(T)+1.0V,
Short Circuit Current Ishort
NOTE: *1: VOUT(T): Setting output voltage
*2: V
OUT(E) = Effective output voltage
(i.e. the output voltage when “V
*3: Vdif = { V
*4: V
IN0 = The input voltage when VOUT0 appears as input voltage is gradually decreased.
*5: V
OUT0 = A voltage equal to 98% of the output voltage whenever an amply stabilized IOUT {VOUT(T) + 1.0V} is input.
*6: Refer to “VOLTAGE CHART”.
*7: Unless otherwise stated, V
*8: When the series are the XC6411P and XC6412C series, ‘V
IN0
(*4)–
VOUT0
OUT(T) + 1.0V” is provided at the VIN pin while maintaining a certain IOUT value).
(*5)
}
EN2=VIN for the XC6412 series.
V
VOUT =0V
IN” shown in the conditions represents VIN1 or VIN2.
XC6411/XC6412
Ta = 2 5
CIRCUIT
100 300 -
120 300 -
160 300 -
200 300 -
200 300 -
- 50 - mA ①
mA ①
Series
5/28
pply
)
℃
℃
■
XC6411/XC6412 Series
ELECTRICAL CHARACTERISTICS (Continued)
XC6411P Series: Regulator 1, Regulator 2 (each channel
PAR AMETER SYMBOL CONDITIONS MIN. TYP. MAX. UNITS
VIN=VOUT(T) + 1.0V
OUT(T)≦3.9V
Supply Current IDD
XC6412B Series (SOT-26)
PAR AMETER
SYMBOL
V
IN=VOUT(T) + 1.0V
V
V
OUT(T)≧4.0V
CONDITIONS MIN. TYP. MAX. UNITS
VIN=VOUT(T) + 1.0V,
V
EN2=VIN
V
Supply Current 2 (*8) IDD2
OUT(T)≦3.9V
IN=VOUT(T) + 1.0V,
V
V
EN2=VIN
VOUT(T)≧4.0V
VIN=VOUT(T) + 1.0V,
EN2=VIN
V
V
Supply Current 3 (*9) IDD3
OUT(T)≦3.9V
V
IN=VOUT(T) + 1.0V,
V
EN2=VIN
OUT(T)≧4.0V
V
EN ‘H’ Level Voltage VENH VIN=VOUT(T)+1.0V 1.0 - 6.0 V ①
EN ‘L’ Level Voltage VENL VIN=VOUT(T)+1.0V - - 0.3 V ①
IN=VOUT(T)+1.0V,
EN ‘H’ Level Current IENH
EN ‘L’ Level Current IENL
NOTE:
*8: Supply current of the IC: (VR1 supply current + VR2 supply current)
*9: Su
current of the IC when VR2 is in stand-by mode: (VR1 supply current + VR2 stand-by current)
V
V
EN2=VIN
IN=VOUT(T)+1.0V,
V
V
EN2=VIN
- 0.8 1.5 μA 2
1.0 1.8 μA 2
- 1.6 3.0 μA 2
- 2.0 3.6 μA 2
- 0.8 1.6 μA 2
- 1.0 1.9 μA 2
- 0.1 - 0.1 μA ②
- 0.1 - 0.1 μA ②
Ta = 2 5
CIRCUIT
Ta = 2 5
CIRCUIT
6/28
■
)
ELECTRICAL CHARACTERISTICS (Continued
●Voltage Chart
PARAMETER
SETTING OUTPUT
OUTPUT VOLTAGE (V) DROPOUT VOLTAGE 1 (mV)
E-0 E-1
VOLTAGE
VOUT(T)
MIN. MAX. TYP. MAX.
VOUT Vdif
0.9 0.870 0.930 870 1000
1.0 0.970 1.030 860 1000
1.1 1.070 1.130 780 950
1.2 1.170 1.230 800 1000
1.3 1.270 1.330 720 900
1.4 1.370 1.430 750 960
1.5 1.470 1.530 700 890
1.6 1.568 1.632 680 860
1.7 1.666 1.734 650 830
1.8 1.764 1.836 630 800
1.9 1.862 1.938 610 780
2.0 1.960 2.040 580 740
2.1 2.058 2.142 580 740
2.2 2.156 2.244 580 740
2.3 2.254 2.346 510 650
2.4 2.352 2.448 510 650
2.5 2.450 2.550 450 580
2.6 2.548 2.652 450 580
2.7 2.646 2.754 450 580
2.8 2.744 2.856 450 580
2.9 2.842 2.958 450 580
3.0 2.940 3.060 320 420
3.1 3.038 3.162 320 420
3.2 3.136 3.264 320 420
3.3 3.234 3.366 320 420
3.4 3.332 3.468 320 420
3.5 3.430 3.570 320 420
3.6 3.528 3.672 320 420
3.7 3.626 3.774 320 420
3.8 3.724 3.876 320 420
3.9 3.822 3.978 320 420
4.0 3.920 4.080 290 380
4.1 4.018 4.182 290 380
4.2 4.116 4.284 290 380
4.3 4.214 4.386 290 380
4.4 4.312 4.488 290 380
4.5 4.410 4.590 290 380
4.6 4.508 4.692 290 380
4.7 4.606 4.794 290 380
4.8 4.704 4.896 290 380
4.9 4.802 4.998 290 380
5.0 4.900 5.100 230 310
Ta = 2 5℃
XC6411/XC6412
Series
7/28
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XC6411/XC6412 Series
TEST CIRCUITS
●XC6411 Series
Circuit①
V
C
IN1
(cer amic)
=1.0u F
V
IN2
C
(cer amic)
=1.0uF
●XC6412B Series (SOT-26)
Circuit ①
V
CIN=1.0u F
(ceramic)
V
8/28
V
IN
EN2
V
IN1
V
IN2
XC6411P
V
SS
XC6412B
V
SS
V
V
OUT1
OUT2
V
V
OUT1
OUT2
CL1=0.1uF
(cer amic)
CL2=0.1uF
(cer amic)
CL1=0.1uF
(ceramic)
CL2=0.1uF
(ceramic)
Circuit②
V
IN1
C
IN1
(cer amic)
C
IN2
(ceramic)
A
=1.0uF
A
=1.0uF
V
XC6411P
IN2
A
I
OUT1
V
A
I
OUT2
V
Is ho r t1
RL1
Is ho rt 2
RL2
V
OUT1
V
OUT2
V
SS
OPEN
OPEN
Circuit②
V
IN
A
I
OUT1
V
A
I
OUT2
V
RL1
RL2
Is ho r t1
Is ho r t2
CIN=1.0uF
(ceramic)
A
XC6412B
A
EN2
V
OUT1
V
OUT2
V
SS
OPEN
OPEN
■
■
(
)
XC6411/XC6412
Series
OPERATIONAL EXPLANATION
<Output Voltage Control>
The voltage, divided by resistors R11 & R12 for a regulator 1 and R21 & R22 for a regulator 2 is compared with the internal
reference voltage by the error amplifier. These resistors are connected to the V
the V
OUT pin is then driven by the subsequent output signal. The output voltage at the VOUT pin is controlled and stabilized by a
system of negative feedback. The current limit circuit operates when the load current reaches the current limit level.
●XC6411P Series ●XC6412B Series
V
IN1
V
IN2
Current
Limit1
Current
Limit2
+
-
Voltage
Reference1
+
-
Voltage
Reference2
R11
R12
R21
R22
VOU T1
VOUT2
VSS
VIN
EN2
Current
Current
ON/OFF
Control
VR2 Each Circuit
* Diodes shown in the above circuit are ESD protection diodes and parasitic diodes.
<Dual Inputs>
In the XC6411P series, the two input voltage pins are separated. The two regulators 1 and 2 can operate independently so that
it offers design flexibility.
<Short Protection Circuit>
The XC6411P/6412 series’ regulator offers short-circuit protection by means of a built-in foldback circuit. 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, the output voltage drops further and output current decreases. When the output
voltage pin is shorted, a current of about 50mA flows.
<EN2 Pin>
The regulator 2’s internal circuitry can be operated or shutdown via the signal from the EN2 pin with the XC6412 series. In so
doing the regulator 1 maintains an operational state constantly. In shutdown mode, output at the V
to the V
unstable with the EN2 pin open. We suggest that you use this IC with either a VIN voltage or a VSS voltage input at the EN2 pin.
If this IC is used with the correct specifications for the EN pin, 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.
、
SS level via R21 & R22. Note that the XC6412 series’ regulator is “High Active/No Pull-Down”, operations will become
NOTES 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.
3. As for the XC6412 series, internally achieved phase compensation makes a stable operation of the IC possible even when
there is no output capacitor (C
about 0.1 to 1.0μF be connected between each V
prevent an undershoot or overshoot, we recommend that the output capacitor (CL) of about 0.1 to1.0μF be connected
between each VOUT pin and the VSS pin. However, please wire the input capacitor (CIN) and the output capacitor (CL) as
close to the IC as possible.
L). In order to stabilize the VIN’s voltage level, we recommend that an input capacitor (CIN) of
IN pin and the VSS pin. Moreover, during transient response, so as to
Limit1
Limit2
SOT-26
+
-
Voltage
Reference1
+
-
Voltage
Reference2
OUT pin. The P-channel MOSFET connected to
VOU T1
R11
R12
VOU T2
R21
R22
VSS
OUT2 pin will be pulled down
9/28
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