Datasheet

UNISONIC TECHNOLOGIES CO., LTD
78TXXAA
LINEAR INTEGRATED CIRCUIT
3-TERMINAL 1.5A POSITIVE
VOLTAGE REGULATOR

DESCRIPTION
The UTC 78TXXAA family is monolithic fixed voltage regulator
integrated circuit. They are suitable for applications requiring supply
current up to 1.5 A.

FEATURES
* Output current up to 1.5A
* Fixed output voltage of 5V, 6V, 7V, 8V, 9V, 10V, 12V, 15V, 18V
and 24V available
* Thermal overload shutdown protection
* Short circuit current limiting
* Output transistor SOA protection

ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
78TXXAAL-TQ2-T
78TXXAAG-TQ2-T
78TXXAAL-TQ2-R
78TXXAAG-TQ2-R
Note: Pin Assignment: O: Output G: GND I: Input
www.unisonic.com.tw
Copyright © 2013 Unisonic Technologies Co., Ltd
Package
TO-263
TO-263
Pin Assignment
1
2
3
I
G
O
I
G
O
Packing
Tube
Tape Reel
1 of 10
QW-R101-044.A
78TXXAA

MARKING INFORMATION
PACKAGE
TO-263

LINEAR INTEGRATED CIRCUIT
VOLTAGE CODE
05:
06:
07:
08:
09:
10:
12:
15:
18:
24:
MARKING
5.0 V
6.0 V
7.0 V
8.0 V
9.0 V
1.0 V
1.2 V
1.5 V
1.8 V
2.4 V
BLOCK DIAGRAM
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2 of 10
QW-R101-044.A
78TXXAA

LINEAR INTEGRATED CIRCUIT
APPLICATION CIRCUIT
VIN
1
UTC 78TXXAA 3
VOUT
2
CI=0.33 μF
CO=0.1 μF
Note 1: To specify an output voltage, substitute voltage value for "XX".
2: Bypass capacitors are recommended for optimum stability and transient response and should be located as
close as possible to the regulators.
UNISONIC TECHNOLOGIES CO., LTD
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3 of 10
QW-R101-044.A
78TXXAA

LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS (Operating temperature range applies unless otherwise specified)
PARAMETER
SYMBOL
RATING
UNIT
35
V
Input voltage
VIN
40
V
Output Current
IOUT
1.5
A
Power Dissipation
PD
Internally Limited
W
Operating Junction Temperature
TOPR
-20 ~ +150
°C
Storage Temperature
TSTG
-55 ~ +150
°C
Note: 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.
VOUT=5~18V
VOUT=24V

THERMAL DATA
PARAMETER
Junction to Ambient
Junction to Case

SYMBOL
θJA
θJC
RATING
65
5
UNIT
°C/W
°C/W
ELECTRICAL CHARACTERISTICS
(IOUT=0.5A, TJ= 0°C~125°C, CI =0.33μF, CO=0.1μF, unless otherwise specified)(Note 1)
For UTC 78T05AA (VIN =10V)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
4.80
TJ =25°C, IOUT=5mA ~ 1.0A
Output Voltage
VOUT
VIN =7.5V ~ 20V,
4.75
IOUT=5mA ~ 1.0A,PD≤15W
Dropout Voltage
VD
TJ =25°C
TJ =25°C,IOUT=5mA ~ 1.5A
Load Regulation
VOUT
TJ =25°C,IOUT=0.25A ~ 0.75A
VIN =7V ~ 25V, TJ =25°C
Line regulation
VOUT
VIN =7.5V ~ 20V, TJ =25°C, IOUT=1.0A
Quiescent Current
IQ
TJ =25°C, IOUT≤1.0A
VIN =7.5V ~ 20V
Quiescent Current Change
IQ
IOUT=5mA ~ 1.0A
Output Noise Voltage
eN
10Hz≤f≤100kHz
Temperature Coefficient of Vo
Vo/T IOUT=5mA
Ripple Rejection
RR
VIN =8V ~ 18V,f=120Hz, TJ =25°C
62
Peak Output Current
IPEAK
TJ =25°C
Short-Circuit Current
ISC
VIN =35V, TJ =25°C
For UTC 78T06AA (VIN =11V)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
5.76
TJ =25°C, IOUT=5mA ~ 1.0A
Output Voltage
VOUT
VIN =8.5V ~ 21V,
5.70
IOUT=5mA ~ 1.0A, PD≤15W
Dropout Voltage
VD
TJ =25°C
TJ =25°C,IOUT=5mA ~ 1.5A
Load Regulation
VOUT
TJ =25°C,IOUT=0.25A~ 0.75A
VIN =8V ~ 25V, TJ =25°C
Line regulation
VOUT
VIN =8.5V ~ 21V, TJ =25°C,IOUT=1.0A
Quiescent Current
IQ
TJ =25°C, IOUT≤1.0A
VIN =8.5V ~ 21V
Quiescent Current Change
IQ
IOUT=5mA ~ 1.0A
Output Noise Voltage
eN
10Hz≤f≤100kHz
Temperature Coefficient of Vo
Vo/T IOUT=5mA
Ripple Rejection
RR
VIN =9V ~ 19V,f=120Hz, TJ =25°C
59
Peak Output Current
IPEAK
TJ =25°C
Short-Circuit Current
ISC
VIN =35V, TJ =25°C
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TYP
5.0
MAX
5.20
UNIT
V
5.25
V
2.0
100
50
50
50
8.0
1.0
0.5
40
-0.6
80
1.8
250
TYP
6.0
MAX
6.24
UNIT
V
6.30
V
2.0
100
50
60
60
8.0
1.0
0.5
45
-0.7
75
1.8
250
V
mV
mV
mV
mV
mA
mA
mA
μV
mV/°C
dB
A
mA
V
mV
mV
mV
mV
mA
mA
mA
μV
mV/°C
dB
A
mA
4 of 10
QW-R101-044.A
78TXXAA

LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS(Cont.)
For UTC 78T07AA (VIN =13V)
PARAMETER
SYMBOL
Output Voltage
VOUT
Dropout Voltage
VD
Load Regulation
VOUT
Line regulation
VOUT
Quiescent Current
IQ
IQ
Quiescent Current Change
Output Noise Voltage
Temperature Coefficient of Vo
Ripple Rejection
Peak Output Current
Short-Circuit Current
eN
Vo/T
RR
IPEAK
ISC
For UTC 78T08AA (VIN =14V)
PARAMETER
SYMBOL
Output Voltage
VOUT
Dropout Voltage
VD
Load Regulation
VOUT
Line regulation
VOUT
Quiescent Current
IQ
IQ
Quiescent Current Change
Output Noise Voltage
Temperature Coefficient of Vo
eN
Vo/T
Ripple Rejection
RR
Peak Output Current
Short-Circuit Current
IPEAK
ISC
TEST CONDITIONS
TJ =25°C, IOUT=5mA - 1.0A
VIN =9.5V ~ 22V,
IOUT=5mA ~ 1.0A, PD≤15W
TJ =25°C
TJ =25°C,IOUT=5mA ~ 1.5A
TJ =25°C,IOUT=0.25A ~ 0.75A
VIN =9V ~ 25V, TJ =25°C
VIN =9.5V ~ 22V, TJ =25°C,IOUT=1.0A
TJ =25°C, IOUT≤1.0A
VIN =9.5V ~ 22V
IOUT=5mA ~ 1.0A
10Hz≤f≤100kHz
IOUT=5mA
VIN =10V ~ 20V,f=120Hz, TJ =25°C
TJ =25°C
VIN =35V, TJ =25°C
MIN
6.72
59
50
-0.8
75
1.7
250
TEST CONDITIONS
TJ =25°C, IOUT=5mA~ 1.0A
VIN =10.5V ~ 23V,
IOUT=5mA ~ 1.0A, PD≤15W
TJ =25°C
TJ =25°C,IOUT=5mA ~ 1.5A
TJ =25°C,IOUT=0.25A ~ 0.75A
VIN =10.5V ~ 25V, TJ =25°C
VIN =10.5V ~ 23V, TJ =25°C,IOUT=1.0A
TJ =25°C, IOUT≤1.0A
VIN =10.5V ~ 23V
IOUT=5mA ~ 1.0A
10Hz≤f≤100kHz
IOUT=5mA
VIN =11.5V ~ 21.5V,
f=120Hz, TJ =25°C
TJ =25°C
VIN =35V, TJ =25°C
MIN
7.68
TYP
8.0
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TYP
7.0
6.65
MAX
7.28
UNIT
V
7.35
V
2.0
100
50
70
70
8.0
1.0
0.5
7.60
MAX
8.32
UNIT
V
8.40
V
2.0
58
-0.9
V
mV
mV
mV
mV
mA
mA
mA
μV
mV/°C
72
dB
1.8
250
A
mA
100
50
80
80
8.0
1.0
0.5
56
V
mV
mV
mV
mV
mA
mA
mA
μV
mV/°C
dB
A
mA
5 of 10
QW-R101-044.A
78TXXAA

LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS(Cont.)
For UTC 78T09AA (VIN =15V)
PARAMETER
SYMBOL
Output Voltage
VOUT
Dropout Voltage
VD
Load Regulation
VOUT
Line regulation
VOUT
Quiescent Current
IQ
IQ
Quiescent Current Change
Output Noise Voltage
Temperature Coefficient of Vo
Ripple Rejection
Peak Output Current
Short-Circuit Current
eN
Vo/T
RR
IPEAK
ISC
For UTC 78T10AA (VIN =16V)
PARAMETER
SYMBOL
Output Voltage
VOUT
Dropout Voltage
VD
Load Regulation
VOUT
Line regulation
VOUT
Quiescent Current
IQ
IQ
Quiescent Current Change
Output Noise Voltage
Temperature coefficient of Vo
Ripple Rejection
Peak Output Current
Short-Circuit Current
eN
Vo/T
RR
IPEAK
ISC
TEST CONDITIONS
TJ =25°C, IOUT=5mA ~ 1.0A
VIN =11.5V ~ 24V,
IOUT=5mA ~ 1.0A,PD≤15W
TJ =25°C
TJ =25°C,IOUT=5mA ~ 1.5A
TJ =25°C,IOUT=0.25A ~ 0.75A
VIN =11.5V ~ 25 V, TJ =25°C
VIN =11.5V ~ 24V, TJ =25°C, IOUT=1.0A
TJ =25°C, IOUT≤1.0A
VIN =11.5V ~ 24V
IOUT=5mA ~ 1.0A
10Hz≤f≤100kHz
IOUT=5mA
VIN =12.5V ~ 22.5V,f=120Hz, TJ =25°C
TJ =25°C
VIN =35V, TJ =25°C
TEST CONDITIONS
TJ =25°C, IOUT=5mA ~ 1.0A
VIN =12.5V ~ 25V,
IOUT=5mA ~ 1.0A,PD≤15W
TJ =25°C
TJ =25°C,IOUT=5mA - 1.5A
TJ =25°C,IOUT=0.25A - 0.75A
VIN =13V ~ 25V, TJ =25°C
VIN =13V ~ 25V, TJ =25°C,IOUT=1.0A
TJ =25°C, IOUT≤1.0A
VIN =12.6V ~ 25V
IOUT=5mA - 1.0A
10Hz≤f≤100kHz
IOUT=5mA
VIN =13V - 23V,f=120Hz, TJ =25°C
TJ =25°C
VIN =35V, TJ =25°C
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MIN
8.64
TYP
9.0
8.55
MAX
9.36
UNIT
V
9.45
V
2.0
100
50
90
90
8.0
1.0
0.5
56
58
-1.1
72
1.8
250
MIN
9.60
TYP
10.0
9.50
MAX
10.40
UNIT
V
10.50
V
2.0
100
50
100
100
8.0
1.0
0.5
56
58
-1.1
72
1.8
250
V
mV
mV
mV
mV
mA
mA
mA
μV
mV/°C
dB
A
mA
V
mV
mV
mV
mV
mA
mA
mA
μV
mV/°C
dB
A
mA
6 of 10
QW-R101-044.A
78TXXAA

LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS(Cont.)
For UTC 78T12AA (VIN =19V)
PARAMETER
SYMBOL
Output Voltage
VOUT
Dropout Voltage
VD
Load Regulation
VOUT
Line regulation
VOUT
Quiescent Current
IQ
IQ
Quiescent Current Change
Output Noise Voltage
Temperature Coefficient of Vo
Ripple Rejection
Peak Output Current
Short-Circuit Current
eN
Vo/T
RR
IPEAK
ISC
For UTC 78T15AA (VIN =23V)
PARAMETER
SYMBOL
Output Voltage
VOUT
Dropout Voltage
VD
Load Regulation
VOUT
Line regulation
VOUT
Quiescent Current
IQ
IQ
Quiescent Current Change
Output Noise Voltage
Temperature Coefficient of Vo
Ripple Rejection
Peak Output Current
Short-Circuit Current
eN
Vo/T
RR
IPEAK
ISC
TEST CONDITIONS
TJ =25°C, IOUT=5mA ~ 1.0A
VIN =14.5V ~ 27V,
IOUT=5mA ~ 1.0A,PD≤15W
TJ =25°C
TJ =25°C,IOUT=5mA ~ 1.5A
TJ =25°C,IOUT=0.25A ~ 0.75A
VIN =14.5V ~ 30V, TJ =25°C
VIN =14.6V ~ 27V, TJ =25°C, IOUT=1.0A
TJ =25°C, IOUT≤1.0A
VIN =14.5V ~ 30V
IOUT=5mA ~ 1.0A
10Hz≤f≤100kHz
IOUT=5mA
VIN =15V - 25V,f=120Hz, TJ =25°C
TJ =25°C
VIN =35V, TJ =25°C
TYP
12.0
11.40
MAX
12.48
UNIT
V
12.60
V
2.0
100
50
120
120
8.0
1.0
0.5
55
TEST CONDITIONS
MIN
14.40
TJ =25°C, IOUT=5mA ~ 1.0A
VIN =17.5V ~ 30V,
14.25
IOUT=5mA ~ 1.0A,PD≤15W
TJ =25°C
TJ =25°C,IOUT=5mA ~ 1.5A
TJ =25°C,IOUT=0.25A ~ 0.75A
VIN =18.5V ~ 30V, TJ =25°C
VIN =17.7V ~ 30V, TJ =25°C, IOUT =1.0A
TJ =25°C, IOUT≤1.0A
VIN =17.5V ~ 30V
IOUT=5mA ~ 1.0A
10Hz≤f≤100kHz
IOUT=5mA
VIN =18.5V ~ 28.5V,f=120Hz, TJ =25°C
54
TJ =25°C
VIN =35V, TJ =25°C
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MIN
11.52
75
-1.5
72
1.8
250
TYP
15.0
MAX
15.60
UNIT
V
15.75
V
2.0
100
50
150
150
8.0
1.0
0.5
90
-1.8
70
1.8
250
V
mV
mV
mV
mV
mA
mA
mA
μV
mV/°C
dB
A
mA
V
mV
mV
mV
mV
mA
mA
mA
μV
mV/C
dB
A
mA
7 of 10
QW-R101-044.A
78TXXAA

LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS(Cont.)
For UTC 78T18AA (VIN =27V)
PARAMETER
SYMBOL
Output Voltage
VOUT
Dropout Voltage
VD
Load Regulation
VOUT
Line regulation
VOUT
Quiescent Current
IQ
IQ
Quiescent Current Change
Output Noise Voltage
Temperature Coefficient of Vo
Ripple Rejection
Peak Output Current
Short-Circuit Current
eN
Vo/T
RR
IPEAK
ISC
For UTC 78T24AA (VIN =33V)
PARAMETER
SYMBOL
TEST CONDITIONS
TJ =25°C, IOUT=5mA ~ 1.0A
VIN =21V ~ 33V,
IOUT=5mA ~ 1.0A, PD≤15W
TJ =25°C
TJ =25°C,IOUT=5mA ~ 1.5A
TJ =25°C,IOUT=0.25A ~ 0.75A
VIN =21V ~ 33V, TJ =25°C
VIN =21V ~ 33V,
TJ =25°C, IOUT =1.0A
TJ =25°C, IOUT≤1.0A
VIN =21.5V ~ 33V
IOUT=5mA ~ 1.0A
10Hz≤f≤100kHz
IOUT=5mA
VIN =22V ~ 32V,f=120Hz, TJ =25°C
TJ =25°C
VIN =35V, TJ =25°C
MIN
17.28
TYP
18.0
17.10
MAX
18.72
UNIT
V
18.90
V
100
50
180
V
mV
mV
mV
180
mV
8.0
1.0
0.5
mA
mA
mA
μV
mV/°C
dB
A
mA
2.0
53
110
-2.2
69
1.8
250
TEST CONDITIONS
MIN
TYP MAX UNIT
23.04 24.0 24.96
V
TJ =25°C, IOUT=5mA ~ 1.0A
Output Voltage
VOUT
VIN =27V ~ 38V,
22.80
25.20
V
IOUT=5mA ~ 1.0A, ,PD≤15W
Dropout Voltage
VD
TJ =25°C
2.0
V
TJ =25°C,IOUT=5mA ~ 1.5A
100
mV
Load Regulation
VOUT
TJ =25C,IOUT=0.25A ~ 0.75A
50
mV
VIN =27V ~ 38V, TJ =25°C
240
mV
Line regulation
VOUT
VIN =27V ~ 38V, TJ =25°C,I OUT=1.0A
240
mV
Quiescent Current
IQ
TJ =25°C, IOUT≤1.0A
8.0
mA
VIN =28V ~ 38V
1.0
mA
Quiescent Current Change
IQ
IOUT=5mA ~ 1.0A
0.5
mA
Output Noise Voltage
eN
10Hz≤f≤100kHz
170
μV
Temperature Coefficient of Vo
Vo/T IOUT=5mA
-2.8
mV/°C
Ripple Rejection
RR
VIN =28V ~ 38V, f=120Hz, TJ =25°C
50
66
dB
Peak Output Current
IPEAK
TJ =25°C
1.8
A
Short-Circuit Current
ISC
VIN =35V, TJ =25°C
250
mA
Note 1: The Maximum steady state usable output current are dependent on input voltage, heat sinking, lead length
of the package and copper pattern of PCB. The data above represents pulse test conditions with junction
temperatures specified at the initiation of test.
Note 2: Power dissipation<0.5W
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8 of 10
QW-R101-044.A
78TXXAA
Output Voltage, VO (V)
Power Dissipation, PD (W)
TYPICAL CHARACTERISTICS
100
50
0
-50
-100
Output Voltage vs. Input Voltage
10
TJ=25℃
9
Output Voltage, VO (mA)
Output Voltage Change, △VO (mV)
Output Voltage Change vs. Junction Temperature
200
IO=5mA
150
-150
8
7
6
5
IO=0A
4
IO=0.5A
3
2
IO=1A
1
0
-200
-50 -25 0 25 50 75 100 125 150
Junction Temperature, TJ (℃)
0
2
4
8
10
6
Input Voltage, VIN (V)
12
Dropout Voltage, VD (V)
GND-Pin Current, IQ (mA)

LINEAR INTEGRATED CIRCUIT
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9 of 10
QW-R101-044.A
78TXXAA
LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS(Cont.)
Ripple Rejection, RR (dB)
Output Peak Current, IO peak (A)

Dropout Voltage vs. Output Current
Output Voltage vs. Output Current
10
TJ=25
2
1.5
1
0.5
VIN=10V
9
Output Voltage, VD (V)
Dropout Voltage, VD (V)
2.5
8
7
6
5
4
3
2
1
0
0
0.25
0.5 0.75 1
1.25 1.5
Output Current, IO (A)
0
0
0.4
0.8 1.2 1.6
2
Output Current, IO (A)
2.4
UTC assumes no responsibility for equipm ent failures that result from using products at values that
exceed, even mom entarily, rated values (such as m aximum ratings, operating condition ranges, or
other param eters) 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 system s where
m alfunction 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 inform ation
presented in this docum ent 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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10 of 10
QW-R101-044.A