UTC UC621XX
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 laser 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.
CMOS IC
1
2
3
5
4
SOT-25
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 : 1000mA
* Output Voltage Range : 2V ~ 6V in 0.1V increments
* Highly Accurate : Set-up voltage ±2%
* Low Power Consumption : Typ.50μA (V
OUT
=5.0V)
: Typ.0.2μA (Stand-by)
* Output Voltage Temperature Characteristics
: Typ. ±100ppm/℃
* Input Stability : Typ.0.1%/V
APPLICATIONS
* Portable Cameras and Video Recorders
* Battery Powered Equipment
* Palmtops
* Reference Voltage Sources
PIN CONFIGURATION
V
OUT
V
IN
3
2
V
SS
1
4
5
EXT
CE
UTC
UNISONIC TECHNOLOGIES CO., LTD.
1
QW-R502-028,A
UTC UC621XX
PIN DESCRIPTION
PIN NO.
1
2
3
4
5
CMOS IC
PIN NAME
V
SS
V
IN
V
OUT
EXT
CE
FUNCTION
Ground
Supply voltage input
Regulated voltage output
Base current control
Chip enable
FUNCTION
SERIES
UTC UC621XX
CE
H
L
OUTPUT VOLTAGE
ON
OFF
BLOCK DIAGRAM
V
DD
EXT
Current
Limit
CE
+
-
Voltage
Reference
V
OUT
Vss
ABSOLUTE MAXIMUM RATINGS
(Ta=25
℃
)
PARAMETER
V
IN
Input Voltage
V
OUT
Output voltage
CE Input voltage
EXT Output voltage
EXT Output Current
Continuous Total Power Dissipation
Operating Ambient Temperature
Storage Temperature
SYMBOL
V
IN
V
OUT
V
CE
V
EXT
I
EXT
Pd
Topr
Tstg
RATINGS
12
Vss-0.3 ~ V
IN
+0.3
Vss-0.3 ~ V
IN
+0.3
12
50
150
-30 ~ +80
-40 ~ +125
UNIT
V
V
V
V
mA
mW
℃
℃
UTC
UNISONIC TECHNOLOGIES CO., LTD.
2
QW-R502-028,A
UTC UC621XX
ELECTRICAL CHARACTERISTICS
UC62130 (V
OUT
(T)=3.0V, Ta=25℃, unless otherwise noted.) (Note 1)
PARAMETER
Output Voltage (Note2)
Maximum Output Current*
Load Stability*
Input-Output Voltage
Differential (Note3)
Supply Current1
Supply Current2
Input Stability*
Input Voltage
Output Voltage Temperature
Characteristics*
EXT Output Voltage
EXT Leak Current
CE ”High” Level Voltage
CE ”Low” Level Voltage
CE ”High” Level Current
CE ”Low” Level Current
CMOS IC
SYMBOL
V
OUT
(E)
I
OUT
max.
△
V
OUT
V
dif
Iss1
Iss2
△
V
OUT
△
V
I×
V
OUT
V
IN
△
V
OUT
△
Topr
×
V
OUT
TEST CONDITONS
I
OUT
=50mA, V
IN
=4.0V
V
IN
=4.0V
V
IN
=4.0V, 1mA
≤
I
OUT
≤
100mA
I
OUT
=100mA
V
IN
=4.0V, V
CE
=Vss
V
IN
=8.0V, V
CE
=V
IN
I
OUT
=50mA, 4.0V
≤
V
IN
≤
8.0V
MIN
2.940
-60
TYP
3.000
1000
100
50
0.1
MAX
3.060
60
UNIT
V
mA
mV
mV
0.6
80
0.3
8
μ
A
μ
A
%/V
V
ppm/
℃
I
OUT
=10mA, -30
℃≤
Topr
≤
80
℃
±
100
V
EXT
I
LEAK
V
CEH
V
CEL
I
CEH
I
CEL
8
0.5
1.5
V
CE
=V
IN
V
CE
=Vss
0.25
0.1
0
V
μ
A
V
V
μ
A
μ
A
-0.2
-0.05
UC62133 (V
OUT
(T)=3.3V, Ta=25℃, unless otherwise noted.) (Note 1)
PARAMETER
Output Voltage (Note2)
Maximum Output Current*
Load Stability*
Input-Output Voltage
Differential (Note3)
Supply Current1
Supply Current2
Input Stability*
Input Voltage
Output Voltage Temperature
Characteristics*
EXT Output Voltage
EXT Leak Current
CE ”High” Level Voltage
CE ”Low” Level Voltage
CE ”High” Level Current
CE ”Low” Level Current
SYMBOL
V
OUT
(E)
I
OUT
max.
△
V
OUT
V
dif
Iss1
Iss2
△
V
OUT
△
V
I×
V
OUT
V
IN
△
V
OUT
△
Topr
×
V
OUT
TEST CONDITONS
I
OUT
=50mA, V
IN
=4.3V
V
IN
=4.3V
V
IN
=4.3V, 1mA
≤
I
OUT
≤
100mA
I
OUT
=100mA
V
IN
=4.3V, V
CE
=Vss
V
IN
=8.0V, V
CE
=V
IN
I
OUT
=50mA, 4.3V
≤
V
IN
≤
8.0V
MIN
3.234
-60
TYP
3.300
1000
100
50
0.1
MAX
3.366
60
UNIT
V
mA
mV
mV
0.6
80
0.3
8
μ
A
μ
A
%/V
V
ppm/
℃
I
OUT
=10mA, -30
℃≤
Topr
≤
80
℃
±
100
V
EXT
I
LEAK
V
CEH
V
CEL
I
CEH
I
CEL
8
0.5
1.5
V
CE
=V
IN
V
CE
=Vss
0.25
0.1
0
V
μ
A
V
V
μ
A
μ
A
-0.2
-0.05
UTC
UNISONIC TECHNOLOGIES CO., LTD.
3
QW-R502-028,A
UTC UC621XX
UC62150 (V
OUT
(T)=5.0V, Ta=25℃, unless otherwise noted.) (Note 1)
PARAMETER
Output Voltage (Note2)
Maximum Output Current*
Load Stability*
Input-Output Voltage
Differential(Note3)
Supply Current1
Supply Current2
Input Stability*
Input Voltage
CMOS IC
SYMBOL
V
OUT
(E)
I
OUT
max.
△
V
OUT
V
dif
Iss1
Iss2
△
V
OUT
△
V
IN×
V
OUT
V
IN
TEST CONDITONS
I
OUT
=50mA, V
IN
=6.0V
V
IN
=6.0V
VIN=6.0V, 1mA
≤
I
OUT
≤
100mA
I
OUT
=100mA
V
IN
=6.0V, V
CE
=Vss
V
IN
=8.0V, V
CE
=V
IN
I
OUT
=50mA, 6.0V
≤
V
IN
≤
8.0V
MIN
4.900
-60
TYP
5.000
1000
100
50
0.1
MAX
5.100
60
UNIT
V
mA
mV
mV
0.6
80
0.3
8
μ
A
μ
A
%/V
V
I
OUT
=10mA, -30
℃≤
Topr
≤
80
℃
△
V
OUT
Output Voltage Temperature
ppm/
℃
±
100
△
Topr
×
V
OUT
Characteristics*
EXT Output Voltage
V
EXT
8
V
μ
A
EXT Leak Current
I
LEAK
0.5
CE ”High” Level Voltage
V
CEH
1.5
V
CE ”Low” Level Voltage
V
CEL
0.25
V
μ
A
CE ”High” Level Current
I
CEH
V
CE
=V
IN
0.1
μ
A
CE ”Low” Level Current
I
CEL
V
CE
=Vss
-0.2
-0.05
0
Note:
1. V
OUT
(T)=Specified Output Voltage.
2. V
OUT
(E)=Effective Output Voltage (i.e. the output voltage when "V
OUT
(T)+1.0V" is provided at the V
IN
pin while
maintaining a certain I
OUT
value).
3. Vdif= {V
IN
1 (Note5)-V
OUT
1 (Note4)}
4. V
OUT
1= A voltage equal to 98% of the Output Voltage whenever an amply stabilised I
OUT
{V
OUT
(T)+1.0V} is
input.
5. V
IN
1= The Input Voltage when V
OUT
1 appears as Input Voltage is gradually decreased.
6. 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 h
FE
equal to 100 or more.
TYPICAL APPLICATION CIRCUIT
PNP Tr
R
BE
+
R
B
EXT
+
V
IN
C
IN
(Tantalum)
V
IN
CE
Vss
V
OUT
C
L
R
L
Peripherals:
(Tantalum)
PNP Tr: 2SA1213
R
BE
: 20KΩ
~
47KΩ
R
B
: Please refer to Note 2 on the following page.
C
IN
: 10μF(Tantalum)
C
L
: 47μF(Tantalum)10μF minimum
UTC
UNISONIC TECHNOLOGIES CO., LTD.
4
QW-R502-028,A
UTC UC621XX
TYPICAL PERFORMANCE CHARACTERISTIC
UTC UC62133
1.0
C
L
=10μF(tantalum)
CMOS IC
Input/Output Diff, V
dif
(V)
0.8
0.6
Topr=25℃
0.4
80℃
0.2
-30℃
0.0
0
200
400
600
800
1000
Output Current, I
OUT
(mA)
OPERATIONAL EXPLANATION
Functional Description
Output voltage (V
OUT
) 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 (V
CE
) and high h
FE
characteristics be used.
2. R
B
Resistor
Although the IC unit is protected by a base current remitter circuit, it is recommended that a resistor (R
B
) 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 I
OUT
(max.) at V
IN
(min.). However, the larger the input current, the larger the output current (I
OUT
)
that can be obtained.
V
IN
(min)-1.2(V)
R
B
0.7(V)
I
OUT
(max)
R
BE
＞
h
FE
3. R
BE
Resistor, C
L
Capacitor
To prevent oscillation due to output load variation, use of a phase compensation capacitor C
L
is recommended.
Please use a Tantalum capacitor of at least 10
μ
F. Please also use an R
BE
resistor of less than 47kΩ.
An R
BE
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
UTC
UNISONIC TECHNOLOGIES CO., LTD.
5
QW-R502-028,A
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