Datasheet

UNISONIC TECHNOLOGIES CO., LTD
UC621XX
CMOS IC
BOOSTING VOLTAGE
REGULATORS

DESCRIPTION
The UTC UC621XX is a positive output voltage regulator that can
supply up to 1A of output current using an external transistor. Low
power and high accuracy are achieved through CMOS process and
metal fuses trimming technologies.
The series consists of a high precision voltage reference, an error
correction circuit and a short-circuit protected output driver.
In stand-by mode, supply current can be dramatically cut. Since the
input-output voltage differential is small, loss control efficiency is
good.
The UTC UC621XX is particularly suited for use with battery
operated portable products, and products where supply current
regulation is required.

FEATURES
* Ultra Small Input-Output Voltage Differential
: 100mA of output current is available with a differential of 0.1V.
(Performance depends on the external transistor characteristics.)
* Maximum Output Current : 1A
* Output Voltage Range : 2V ~ 6V in 0.1V increments
* Highly Accurate : Set-up voltage ±2%
* Low Power Consumption : Typ.50μA (VOUT = 5.0V)
: Typ.0.2μA (Stand-by)
* Output Voltage Temperature Characteristics: Typ. ±100ppm/℃
* Input Stability : Typ.0.1%/V

ORDERING INFORMATION
Ordering Number
UC621XXG-AF5-R
Note: xx: Output Voltage, refer to Marking Information.
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Copyright © 2014 Unisonic Technologies Co., Ltd
Package
SOT-25
Packing
Tape Reel
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UC621XX

CMOS IC
MARKING INFORMATION
PACKAGE
VOLTAGE CODE
SOT-25
30:3.0V
33:3.3V
40:4.0V
50:5.0V
MARKING
4
5
62XXG
Voltage Code
1

PIN CONFIGURATION

PIN DESCRIPTION
PIN NO.
1
2
3
4
5

3
FUNCTION
Ground
Supply voltage input
Regulated voltage output
Base current control
Chip enable
FUNCTION
SERIES
UTC UC621XX

PIN NAME
VSS
VIN
VOUT
EXT
CE
2
CE
H
L
OUTPUT VOLTAGE
ON
OFF
BLOCK DIAGRAM
VOUT
VDD
EXT
Current
Limit
CE
+
Voltage
Reference
Vss
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UC621XX

CMOS IC
ABSOLUTE MAXIMUM RATINGS (TA=25°C, Unless otherwise specified)
PARAMETER
SYMBOL
RATINGS
UNIT
Input Voltage
VIN
12
V
Output Voltage
VOUT
Vss-0.3 ~ VIN+0.3
V
CE Input Voltage
VCE
Vss-0.3 ~ VIN+0.3
V
EXT Output Voltage
VO(EXT)
12
V
EXT Output Current
IEXT
50
mA
Power Dissipation
PD
150
mW
Junction Temperature
TJ
+125
°C
Operating Temperature
TOPR
-40 ~ +85
°C
Storage Temperature
TSTG
-40 ~ +150
°C
Notes: 1. Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
2. The device is guaranteed to meet performance specification within 0°C ~+70°C operating temperature
range and assured by design from -20°C ~+85°C.

ELECTRICAL CHARACTERISTICS (TA=25°C, Unless otherwise specified)
UC62130( VOUT(T) =3.0V)
PARAMETER
Output Voltage (Note2)
Input Voltage
EXT Output Voltage
High
CE Level Voltage
Low
Load Stability (Note 4)
Input-Output Voltage Differential
Maximum Output Current(Note 4)
Supply Current1
Supply Current2
EXT Leakage Current
High
CE Level Current
Low
Input Stability (Note 4)
Output Voltage Temperature
Characteristics (Note 4)
UC62133(VOUT(T)=3.3V)
PARAMETER
Output Voltage (Note2)
Input Voltage
EXT Output Voltage
High
CE Level Voltage
Low
Load Stability (Note 4)
Input-Output Voltage Differential
Maximum Output Current (Note 4)
Supply Current1
Supply Current2
EXT Leakage Current
High
CE Level Current
Low
Input Stability (Note 4)
Output Voltage Temperature
Characteristics (Note 4)
SYMBOL
VOUT(E)
VIN
VEXT
VCEH
VCEL
△VOUT
VDIFF
IOUT(MAX)
Iss1
Iss2
ILEAK
ICEH
ICEL
△VOUT
△VIN×VOUT
△VOUT
△TOPR×VOUT
SYMBOL
VOUT(E)
VIN
VEXT
VCEH
VCEL
△VOUT
VDIFF
IOUT(MAX)
Iss1
Iss2
ILEAK
ICEH
ICEL
△VOUT
△VIN×VOUT
△VOUT
△TOPR×VOUT
TEST CONDITIONS
IOUT =50mA, VIN=4.0V
TYP
3.000
MAX
3.060
8
8
-0.05
0.6
80
0.5
0.1
0
UNIT
V
V
V
V
V
mV
mV
mA
μA
μA
μA
μA
μA
0.1
0.3
%/V
1.5
VIN =4.0V, 1mA≤IOUT≤100mA
IOUT =100mA
VIN=4.0V
VIN =4.0V, VCE =VSS
VIN =8.0V, VCE =VIN
VCE =VIN
VCE =VSS
100
1000
50
-0.2
IOUT =10mA, -20°C ≤TOPR≤85°C
TEST CONDITIONS
IOUT =50mA, VIN =4.3V
0.25
60
-60
IOUT =50mA, 4.0V≤VIN≤8.0V
±100
MIN
3.234
TYP
3.300
ppm/°C
MAX
3.366
8
8
-0.05
0.6
80
0.5
0.1
0
UNIT
V
V
V
V
V
mV
mV
mA
μA
μA
μA
μA
μA
0.1
0.3
%/V
1.5
VIN =4.3V, 1mA≤IOUT≤100mA
IOUT =100mA
VIN =4.3V
VIN =4.3V, VCE =VSS
VIN =8.0V, VCE =VIN
VCE =VIN
VCE =VSS
IOUT =50mA, 4.3V≤VIN≤8.0V
IOUT =10mA, -20°C ≤TOPR≤85°C
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MIN
2.940
0.25
60
-60
100
1000
50
-0.2
±100
ppm/°C
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
CMOS IC
ELECTRICAL CHARACTERISTICS(Cont.)
UC62140 (VOUT(T)=4.0V)
PARAMETER
Output Voltage (Note2)
Input Voltage
EXT Output Voltage
High
CE Level Voltage
Low
Load Stability (Note 4)
Input-Output Voltage Differential
Maximum Output Current(Note 4)
Supply Current1
Supply Current2
EXT Leakage Current
High
CE Level Current
Low
Input Stability (Note 4)
Output Voltage Temperature
Characteristics (Note 4)
SYMBOL
VOUT(E)
VIN
VEXT
VCEH
VCEL
△VOUT
VDIFF
IOUT(MAX)
Iss1
Iss2
ILEAK
ICEH
ICEL
△VOUT
△VIN×VOUT
△VOUT
△TOPR×VOUT
TEST CONDITIONS
IOUT =50mA, VIN =5.0V
MIN
3.92
TYP
4.000
MAX
4.08
8
8
-0.05
0.6
80
0.5
0.1
0
UNIT
V
V
V
V
V
mV
mV
mA
μA
μA
μA
μA
μA
0.1
0.3
%/V
1.5
VIN =5.0V, 1mA≤IOUT≤100mA
IOUT =100mA
VIN =5.0V
VIN =5.0V, VCE =VSS
VIN =8.0V, VCE =VIN
VCE =VIN
VCE =VSS
IOUT =50mA, 5.0V≤VIN≤8.0V
IOUT =10mA, -20°C ≤TOPR≤85°C
0.25
60
-60
100
1000
50
-0.2
±100
ppm/°C
UC62150 (VOUT(T) =5.0V)
PARAMETER
Output Voltage (Note2)
Input Voltage
EXT Output Voltage
High
CE Level Voltage
Low
Load Stability (Note 4)
Input-Output Voltage Differential
Maximum Output Current(Note 4)
Supply Current1
Supply Current2
EXT Leakage Current
High
CE Level Current
Low
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VOUT(E)
IOUT =50mA, VIN =6.0V
4.900 5.000 5.100
V
VIN
8
V
VEXT
8
V
VCEH
1.5
V
VCEL
0.25
V
△VOUT
VIN =6.0V, 1mA ≤ IOUT ≤100mA
-60
60
mV
VDIFF
IOUT =100mA
100
mV
IOUT(MAX)
VIN =6.0V
1000
mA
Iss1
VIN=6.0V, VCE =VSS
0.6
μA
Iss2
VIN=8.0V, VCE =VIN
50
80
μA
ILEAK
0.5
μA
ICEH
VCE =VIN
0.1
μA
ICEL
VCE =VSS
-0.2
-0.05
0
μA
△VOUT
Input Stability (Note 4)
IOUT=50mA, 6.0V≤VIN ≤8.0V
0.1
0.3
%/V
△VIN×VOUT
Output Voltage Temperature
△VOUT
IOUT =10mA, -20°C ≤TOPR ≤85°C
±100
ppm/°C
Characteristics (Note 4)
△TOPR×VOUT
Notes: 1. VOUT(T)=Specified Output Voltage.
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).
3. VDIFF = {VIN1 -VOUT1 }
*VOUT1 = A voltage equal to 98% of the Output Voltage whenever an amply stabilized IOUT {VOUT(T)+1.0V} is
input.
*VIN1 = The Input Voltage when VOUT1 appears as Input Voltage is gradually decreased.
4. The characteristics for those parameters marked with an asterisk* are liable to vary depending on which
transistor is used. Please use a transistor with a low saturation voltage level and hFE equal to 100 or more.
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CMOS IC

TYPICAL APPLICATION CIRCUIT

OPERATIONAL EXPLANATION
Functional Description
Output voltage (VOUT) can be fixed by revising the external transistor's base current. This can be done by
comparing the detected voltage level and the set voltage power supply level.

DIRECTIONS FOR USE
Suggestions for External Comporients
1. PNP Transistor
The selection of a transistor should take into account output current, input voltage and power dissipation for each
specific application. It is recommended that a transistor that has a low output saturated voltage (VCE) and high hFE
characteristics be used.
2. RB Resistor
Although the IC unit is protected by a base current remitter circuit, it is recommended that a resistor (RB) be
connected between the transistor's base and the IC's EXT pin to protect the transistor.
Required output current can be calculated using the following equation although characteristic variations and
conditions of use should be carefully checked before use. The following equation also indicates the conditions
needed to obtain IOUT (max.) at VIN (min.). However, the larger the input current, the larger the output current (IOUT) that
can be obtained.
VIN(MIN) -1.2(V)
RB
0.7(V)
RBE
IOUT(MAX)
hFE
3. RBE Resistor, CL Capacitor
To prevent oscillation due to output load variation, use of a phase compensation capacitor CL is recommended.
Please use a Tantalum capacitor of at least 10μF. Please also use an RBE resistor of less than 47kΩ.
An RBE resistor of between 20kΩ and 47kΩ is recommended for less power consumption.
4. Input Impedance
In order to control oscillation brought about as a result of impedance at the power supply line, connect a capacitor
of 10μF or more (Tantalum) between the external transistor's emitter and the ground pin.
Special Note
1. Protection Circuit
The built-in protect circuit is to protect the IC only. Therefore to prevent output shorts and overshoot current
through the transistor, use of a resistor RB or an overshoot current protection circuit is recommended. Care should
also be taken with the transistor's power dissipation.
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CMOS IC
TYPICAL CHARACTERISTICS

Output Voltage, VOUT (V)
Output Voltage, VOUT (V)
Output Voltage, V OUT (V)
Output Voltage, V OUT (V)
(1) OUTPUT VOLTAGE vs. OUTPUT CURRENT
(2) OUTPUT VOLTAGE vs. INPUT VOLTAGE
UC62130
3.05
IOUT =1mA 100mA
3.00
500 mA
2.95
2.90
2.85
3.2
TOPR =25℃
C L=10 µF (tantalum)
Output Voltage, VOUT (V)
Output Voltage, V OUT (V)
3.10
UC62130
3
4
5
6
Input Voltage, VIN (V)
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TOPR =25℃
C L=10µF (tantalum)
3.0
2.8
I OUT =1mA
500mA
2.6
100 mA
2.4
2.2
2.5
3.0
3.5
Input Voltage, V IN (V)
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TYPICAL CHARACTERISTICS(Cont.)
UC62133
UC62133
3.5
TOPR =25℃
C L=10 µF (tantalum)
3.35
IOUT=1mA
3.30
Output Voltage, VOUT (V)
Output Voltage, V OUT (V)
3.40
100mA
500 mA
3.25
3.20
3.15
4
5
Input Voltage, VIN (V)
TOPR =25℃
C L=10µF (tantalum)
3.3
IOUT=1mA
3.1
500mA
2.9
100 mA
2.7
2.5
6
2.8
3.3
3.8
Input Voltage, V IN (V)
Output Voltage, V OUT (V)
Output Voltage,V OUT (V)
Output Voltage, V OUT (V)
3
Output Voltage, V OUT (V)

CMOS IC
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CMOS IC
TYPICAL CHARACTERISTICS(Cont.)

Input/Output Differential, VDIFF (V)
Input/Output Differential, VDIFF (V)
Input/Output Differential, VDIFF (V)
Input/Output Differential, VDIFF ( V )
(3) INPUT/OUTPUT VOLTAGE DIFFERENTIAL vs. OUTPUT CURRENT
(4) SUPPLY CURRENT vs. INPUT VOLTAGE
UC62133
50
40
40
30
Supply Current, Iss (µA)
Supply Current, Iss (µA)
UC62130
50
85℃
TOPR =25 ℃
-20℃
20
10
0
3
4
5
6
Input Voltage, VIN (V)
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30
85℃
TOPR =25 ℃
-20℃
20
10
0
3
4
5
6
Input Voltage, VIN (V)
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TYPICAL CHARACTERISTICS(Cont.)
Supply Current, Iss (µA)
SupplyCurrent, Iss (µA)

CMOS IC
Output Voltage, V OUT (V)
Output Voltage, V OUT (V)
Output Voltage, V OUT (V)
Output Voltage, V OUT (V)
(5) OUTPUT VOLTTAGE vs. AMBIENT TEMPERATURE
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Output Voltage, V OUT (V)
Input Voltage, V IN (V)
Supply Current, Iss (µA)
Supply Current, Iss (µA)
Supply Current, Iss (µA)
SupplyCurrent, Iss (µA)

Output Voltage, V OUT (V)
Input Voltage, VIN (V)
UC621XX
CMOS IC
TYPICAL CHARACTERISTICS(Cont.)
(6) SUPPLY CURRENT vs. AMBIENT TEMPERATURE
(7) INPUT TRANSIENT RESPONSE
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UC621XX
CMOS IC
TYPICAL CHARACTERISTICS(Cont.)
UC62133
UC62133
6
IOUT =10mA
CL=10µF (tantalum)
5
3.7
6
3.6
5
Input Voltage
3.7
3.6
Input Voltage
3.5
4
3.5
3.4
3
3.4
2
3.3
2
3.3
1
3.2
1
3.2
4
3
Output Voltage
Output Voltage
Input Voltage, V IN (V)
Input Voltage, V IN (V)
Output Voltage, V OUT (V)
Time (0.4msec /div)
Output Voltage, V OUT (V)
Time (0.4msec /div)
UC62150
Input Voltage
5.3
5.2
6
5.1
5
8
5.4
Output Voltage
4
5.0
3
4.9
Time (0.4 msec/div)
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Input Voltage, V IN (V)
7
IOUT =10mA
CL=10µF (tantalum)
UC62150
Output Voltage, V OUT (V)
8
Input Voltage, V IN (V)
IOUT =100mA
CL=10µF (tantalum)
7
IOUT =100 mA
CL=10µF (tantalum)
Input Voltage
5.4
5.3
6
5.2
5
5.1
Output Voltage
4
5.0
3
4.9
Output Voltage, VOU T (V)

Time (0.4msec/div)
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
CMOS IC
TYPICAL CHARACTERISTICS(Cont.)
(8) LOAD TRANSIENT RESPONSE
UC62130
800
Output Voltage
3.00
600
400
2.95
300mA
Output Current
2.90
1mA
2.85
200
0
VIN =4.3V, C L=10µF (tantalum)
800
3.35
Output Voltage
400
3.25
300mA
1mA
3.15
UC62150
600
400
3.95
300mA
3.90
Output Current
1mA
3.85
200
0
Output Voltage, VOUT (V)
Output Voltage
5.10
1000
Output Voltage, I OUT (mA)
Output Voltage, V OUT (V)
4.00
0
Time (10msec/div)
800
4.05
200
Output Current
3.20
UC62140
VIN =5V, CL=10µF (tantalum)
600
3.30
Time (10msec/div)
4.10
1000
VIN =6V, CL=10µF (tantalum)
Output Voltage
5.05
1000
800
5.00
600
4.95
400
300mA
Output Current
4.90
200
1mA
4.85
Output Voltage, I OUT (mA)
3.05
3.40
Output Voltage, I OUT (mA)
1000
Output Voltage, V OUT (V)
VIN =4.0V, C L=10µF (tantalum)
Output Voltage, I OUT (mA)
Output Voltage, V OUT (V)
3.10
UC62133
0
Time (10msec/div)
Time (10 msec/div)
(9) RIPPLE REJECTION RATE
UC62133
UC62130
60
Ripple Rejection Rate, RR (dB)
Ripple Rejection Rate, RR (dB)
60
50
40
30
20
10
VIN =4.0VDC+0.5VP-PAC
IOUT = 200mA,
CL =10μF (tantalum)
0.1
1
10
Ripple Frequency, f (kHz)
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40
30
20
10
0
0
0.01
50
VIN =4.3VDC+0.5VP-PAC
IOUT = 200mA,
CL=10μF (tantalum)
0.01
0.1
1
10
Ripple Frequency, f (kHz)
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CMOS IC
TYPICAL CHARACTERISTICS(Cont.)

UC62140
UC62150
60
Ripple Rejection Rate, RR (dB)
Ripple Rejection Rate, RR (dB)
60
50
40
30
20
10
VIN = 5VDC+0.5VP-PAC
IOUT =200mA,
CL=10μF (tantalum)
0
50
40
30
20
10
0
0.01
0.1
1
Ripple Frequency, f (kHz)
10
VIN = 6VDC+0.5VP-PAC
IOUT = 200mA,
CL=10μF (tantalum)
0.01
0.1
1
Ripple Frequency, f (kHz)
10
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
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