UNISONIC TECHNOLOGIES CO., LTD
78TXXA LINEAR INTEGRATED CIRCUIT
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Copyright © 2013 Unisonic Technologies Co., Ltd. QW-R101-011.L
3-TERMINAL 1A POSITIVE
VOLTAGE REGULATOR
DESCRIPTION
The UTC 78TXXA family is monolithic fixed voltage regulator integrated
circuit. They are suitable for applications that required supply current up to
1 A.
FEATURES
* Peak Output Current Up To 1 A
* Fixed Output Voltage Of 5V, 6V, 7V, 8V, 9V, 10V, 12V, 15V and 18V
Available
* Thermal Overload Shutdown Protection
* Short Circuit Current Limiting
* Output Transistor SOA Protection
TO-263
1
1
TO-263-3
ORDERING INFORMATION
Ordering Number Package Pin Assignment Packing
Lead Free Halogen Free 1 2 3
78TXXAL-TQ2-R 78TXXAG-TQ2-R TO-263 I G O Tape Reel
78TXXAL-TQ2-T 78TXXAG-TQ2-T TO-263 I G O Tube
78TXXAL-TQ3-R 78TXXAG-TQ3-R TO-263-3 I G O Tape Reel
78TXXAL-TQ3-T 78TXXAG-TQ3-T TO-263-3 I G O Tube
Note: Pin Code: I: Input G: GND O: Output
78TXXA LINEAR INTEGRATED CIRCUIT
UNISONIC TECHNOLOGIES CO., LTD 2 of 9
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MARKING INFORMATION
PACKAGE VOLTAGE CODE MARKING
TO-263
TO-263-3
05 :5.0V
06 :6.0V
07 :7.0V
08 :8.0V
09 :9.0V
10 :10V
12 :12V
15 :15V
18 :18V
78TXXA LINEAR INTEGRATED CIRCUIT
UNISONIC TECHNOLOGIES CO., LTD 3 of 9
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TEST CIRCUIT
3
1
2
GND
OUTPUT
INPUT
R13 R17 R9 Z2 T12
T14
R19
R18
R12
R11 R10
R8
T8 T9
T13
T10
R14
T11 T5
T6
R5
T4
Z1
R15
T15
R16
R1 R2
R4
C1
R6
T7
T3
T1 T2
R3
R7
APPLICATION CIRCUIT
UTC 78TXXA 3
2
1
CO
0.1 µF
CI
0.33 µF
VIN VOUT
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.
78TXXA LINEAR INTEGRATED CIRCUIT
UNISONIC TECHNOLOGIES CO., LTD 4 of 9
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ABSOLUTE MAXIMUM RATINGS (Operating temperature range applies unless otherwise specified)
PARAMETER SYMBOL RATING UNIT
Input Voltage VIN 35 V
Output Current IOUT 1 A
Power Dissipation PD Internally Limited W
Junction Temperature TJ +125 °С
Operating Junction Temperature TOPR -40~ +85 °С
Storage Temperature TSTG -40~ +150 °С
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.
ELECTRICAL CHARACTERISTICS
(TJ= 0°С-125°С,CI =0.33uF,CO=0.1uF,unless otherwise specified) (Note 1)
FOR 78T05 A (VIN=10V, IOUT=0.5A)
PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT
Output Voltage VOUT TJ=25°C, IOUT=5mA - 1.0A 4.80 5.0 5.20 V
VIN=7.5V~20V,IOUT=5mA-1.0A, PD15W≦4.75 5.25 V
Load Regulation ΔVOUT TJ=25°C, IOUT=5mA-1.0A 50 mV
TJ=25°C, IOUT=0.25A-0.75A 25 mV
Line regulation ΔVOUT VIN=7V~25V, TJ=25°C 50 mV
VIN=7.5V~20V, TJ=25°C, IOUT=1.0A 50 mV
Quiescent Current IQ T
J=25°C, IOUT 1.0A ≦ 8.0 mA
Quiescent Current Change ΔIQ VIN=7.5V~20V 1.0 mA
IOUT=5mA-1.0A 0.5 mA
Output Noise Voltage eN 10Hz f 100kHz≦≦ 40 μV
Temperature coefficient of Vo ΔVo/ΔT IOUT=5mA -0.6 mV/°C
Ripple Rejection RR VIN=8V-18V, f=120Hz, TJ=25°C 62 80 dB
Peak Output Current IPEAK T
J=25°C 1.8 A
Short-Circuit Current ISC V
IN=35V, TJ=25°C 250 mA
Dropout Voltage VD T
J=25°C 2.0 V
FOR 78T06 A (VIN=11V, IOUT=0.5A)
PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT
Output Voltage VOUT TJ=25°C, IOUT=5mA-1.0A 5.76 6.0 6.24 V
VIN=8.5V~21V,IOUT=5mA-1.0A, PD15W≦5.70 6.30 V
Load Regulation ΔVOUT TJ=25°C, IOUT=5mA-1.0A 60 mV
TJ=25°C, IOUT=0.25A-0.75A 30 mV
Line regulation ΔVOUT VIN=8V~25V, TJ=25°C 60 mV
VIN=8.5V~21V, TJ=25°C, IOUT=1.0A 60 mV
Quiescent Current IQ T
J=25°C, IOUT 1.0A≦ 8.0 mA
Quiescent Current Change ΔIQ VIN=8.5V~21V 1.0 mA
IOUT=5mA-1.0A 0.5 mA
Output Noise Voltage eN 10Hz f 100kHz≦≦ 45 μV
Temperature coefficient of Vo ΔVo/ΔT IOUT=5mA -0.7 mV/°C
Ripple Rejection RR VIN=9V-19V, f=120Hz, TJ=25°C 59 75 dB
Peak Output Current IPEAK T
J=25°C 1.8 A
Short-Circuit Current ISC V
IN=35V, TJ=25°C 250 mA
Dropout Voltage VD T
J=25°C 2.0 V
78TXXA LINEAR INTEGRATED CIRCUIT
UNISONIC TECHNOLOGIES CO., LTD 5 of 9
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ELECTRICAL CHARACTERISTICS(Cont.)
FOR 78T07 A (VIN=13V, IOUT=0.5A)
PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT
Output Voltage VOUT TJ=25°C, IOUT=5mA-1.0A 6.72 7.0 7.28 V
VIN=9.5V~22V,IOUT=5mA-1.0A,PD15W≦ 6.65 7.35 V
Load Regulation ΔVOUT TJ=25°C, IOUT=5mA-1.0A 70 mV
TJ=25°C, IOUT=0.25A-0.75A 35 mV
Line regulation ΔVOUT VIN=9V~25V, TJ=25°C 70 mV
VIN=9.5V~22V, TJ=25°C, IOUT=1.0A 70 mV
Quiescent Current IQ T
J=25°C, IOUT 1.0A≦ 8.0 mA
Quiescent Current Change ΔIQ VIN=9.5V~22V 1.0 mA
IOUT=5mA-1.0A 0.5 mA
Output Noise Voltage eN 10Hz f 100kHz≦≦ 50 μV
Temperature coefficient of Vo ΔVo/ΔT IOUT=5mA -0.8 mV/°C
Ripple Rejection RR VIN=10V-20V, f=120Hz, TJ=25°C 59 75 dB
Peak Output Current IPEAK T
J=25°C 1.7 A
Short-Circuit Current ISC V
IN=35V, TJ=25°C 250 mA
Dropout Voltage VD T
J=25°C 2.0 V
FOR 78T08 A (VIN=14V, IOUT=0.5A)
PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT
Output Voltage VOUT TJ=25°C, IOUT=5mA-1.0A 7.68 8.0 8.32 V
VIN=10.5V~23V,IOUT=5mA-1.0A,PD15W≦7.60 8.40 V
Load Regulation ΔVOUT TJ=25°C, IOUT=5mA-1.0A 80 mV
TJ=25°C, IOUT=0.25A-0.75A 40 mV
Line regulation ΔVOUT VIN=10.5V~25V, TJ=25°C 80 mV
VIN=10.5V~23V, TJ=25°C, IOUT=1.0A 80 mV
Quiescent Current IQ T
J=25°C, IOUT 1.0A≦ 8.0 mA
Quiescent Current Change ΔIQ VIN=10.5V~23V 1.0 mA
IOUT=5mA-1.0A 0.5 mA
Output Noise Voltage eN 10Hz f 100kHz≦≦ 58 μV
Temperature coefficient of Vo ΔVo/ΔT IOUT=5mA -0.9 mV/°C
Ripple Rejection RR VIN=11.5V~21.5V, f=120Hz, TJ=25°C 56 72 dB
Peak Output Current IPEAK T
J=25°C 1.8 A
Short-Circuit Current ISC V
IN=35V, TJ=25°C 250 mA
Dropout Voltage VD T
J=25°C 2.0 V
FOR 78T09 A (VIN=15V, IOUT=0.5A)
PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT
Output Voltage VOUT TJ=25°C, IOUT=5mA - 1.0A 8.64 9.0 9.36 V
VIN=11.5V~24V,IOUT=5mA-1.0A,PD15W≦8.55 9.45 V
Load Regulation ΔVOUT TJ=25°C, IOUT=5mA-1.0A 90 mV
TJ=25°C, IOUT=0.25A-0.75A 45 mV
Line regulation ΔVOUT VIN=11.5V~25 V, TJ=25°C 90 mV
VIN=11.5V~24V, TJ=25°C, IOUT=1.0A 90 mV
Quiescent Current IQ T
J=25°C, IOUT 1.0A≦ 8.0 mA
Quiescent Current Change ΔIQ VIN=11.5V~24V 1.0 mA
IOUT=5mA–1.0A 0.5 mA
Output Noise Voltage eN 10Hz f 100kHz≦≦ 58 μV
Temperature coefficient of Vo ΔVo/ΔT IOUT=5mA -1.1 mV/°C
Ripple Rejection RR VIN=12.5V~22.5V,
f=120Hz, TJ=25°C
56 72 dB
Peak Output Current IPEAK T
J=25°C 1.8 A
Short-Circuit Current ISC V
IN=35V, TJ=25°C 250 mA
Dropout Voltage VD T
J=25°C 2.0 V
78TXXA LINEAR INTEGRATED CIRCUIT
UNISONIC TECHNOLOGIES CO., LTD 6 of 9
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ELECTRICAL CHARACTERISTICS(Cont.)
FOR 78T10 A (VIN=16V, IOUT=0.5A)
PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT
Output Voltage VOUT TJ=25°C, IOUT=5mA-1.0A 9.60 10.0 10.40 V
VIN=12.5V~25V,IOUT=5mA-1.0A,PD15W≦9.50 10.50 V
Load Regulation ΔVOUT TJ=25°C, IOUT=5mA-1.0A 100 mV
TJ=25°C, IOUT=0.25A-0.75A 50 mV
Line regulation ΔVOUT VIN=13V~25V, TJ=25°C 100 mV
VIN=13V~25V, TJ=25°C, IOUT=1.0A 100 mV
Quiescent Current IQ T
J=25°C, IOUT 1.0A≦ 8.0 mA
Quiescent Current Change ΔIQ VIN=12.6V~25V 1.0 mA
IOUT=5mA-1.0A 0.5 mA
Output Noise Voltage eN 10Hz f 100kHz≦≦ 58 μV
Temperature coefficient of Vo ΔVo/ΔT IOUT=5mA -1.1 mV/°C
Ripple Rejection RR VIN=13V-23V, f=120Hz, TJ=25°C 56 72 dB
Peak Output Current IPEAK T
J=25°C 1.8 A
Short-Circuit Current ISC V
IN=35V, TJ=25°C 250 mA
Dropout Voltage VD T
J=25°C 2.0 V
FOR 78T12 A (VIN=19V, IOUT=0.5A)
PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT
Output Voltage VOUT TJ=25°C, IOUT=5mA-1.0A 11.52 12.0 12.48 V
VIN=14.5V~27V,IOUT=5mA-1.0A,PD15W≦11.40 12.60 V
Load Regulation ΔVOUT TJ=25°C, IOUT=5mA-1.0A 120 mV
TJ=25°C, IOUT=0.25A-0.75A 60 mV
Line regulation ΔVOUT VIN=14.5V~30V, TJ=25°C 120 mV
VIN=14.6V~27V, TJ=25°C, IOUT=1.0A 120 mV
Quiescent Current IQ T
J=25°C, IOUT 1.0A≦ 8.0 mA
Quiescent Current Change ΔIQ VIN=14.5V~30V 1.0 mA
IOUT=5mA-1.0A 0.5 mA
Output Noise Voltage eN 10Hz f 100kHz≦≦ 75 μV
Temperature coefficient of Vo ΔVo/ΔT IOUT=5mA -1.5 mV/°C
Ripple Rejection RR VIN=15V-25V, f=120Hz, TJ=25°C 55 72 dB
Peak Output Current IPEAK T
J=25°C 1.8 A
Short-Circuit Current ISC V
IN=35V, TJ=25°C 250 mA
Dropout Voltage VD T
J=25°C 2.0 V
FOR 78T15 A (VIN=23V, IOUT=0.5A)
PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT
Output Voltage VOUT TJ=25°C, IOUT=5mA-1.0A 14.40 15.0 15.60 V
VIN=17.5V~30V,IOUT=5mA-1.0A,PD15W≦14.25 15.75 V
Load Regulation ΔVOUT TJ=25°C, IOUT=5mA-1.0A 150 mV
TJ=25°C, IOUT=0.25A-0.75A 75 mV
Line regulation ΔVOUT VIN=18.5V~30V, TJ=25°C 150 mV
VIN=17.7V~30V, TJ=25°C, IOUT=1.0A 150 mV
Quiescent Current IQ T
J=25°C, IOUT 1.0A≦ 8.0 mA
Quiescent Current Change ΔIQ VIN=17.5V~30V 1.0 mA
IOUT=5mA-1.0A 0.5 mA
Output Noise Voltage eN 10Hz f 100kHz≦≦ 90 μV
Temperature coefficient of Vo ΔVo/ΔT IOUT=5mA -1.8 mV/°C
Ripple Rejection RR VIN=18.5V~28.5V, f=120Hz, TJ=25°C 54 70 dB
Peak Output Current IPEAK T
J=25°C 1.8 A
Short-Circuit Current ISC V
IN=35V, TJ=25°C 250 mA
Dropout Voltage VD T
J=25°C 2.0 V
78TXXA LINEAR INTEGRATED CIRCUIT
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ELECTRICAL CHARACTERISTICS(Cont.)
FOR 78T18 A (VIN=27V, IOUT=0.5A)
PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT
Output Voltage VOUT TJ=25°C, IOUT=5mA-1.0A 17.28 18.0 18.72 V
VIN=21V~33V, IOUT=5mA-1.0A, PD15W≦17.10 18.90 V
Load Regulation ΔVOUT TJ=25°C, IOUT=5mA-1.0A 180 mV
TJ=25°C, IOUT=0.25A-0.75A 90 mV
Line regulation ΔVOUT VIN=21V~33V, TJ=25°C 180 mV
VIN=21V~33V, TJ=25°C, IOUT=1.0A 180 mV
Quiescent Current IQ T
J=25°C, IOUT 1.0A≦ 8.0 mA
Quiescent Current Change ΔIQ VIN=21.5V~33V 1.0 mA
IOUT=5mA-1.0A 0.5 mA
Output Noise Voltage eN 10Hz f 100kHz≦≦ 110 μV
Temperature coefficient of Vo ΔVo/ΔT IOUT=5mA -2.2 mV/°C
Ripple Rejection RR VIN=22V-32V, f=120Hz, TJ=25°C 53 69 dB
Peak Output Current IPEAK T
J=25°C 1.8 A
Short-Circuit Current ISC V
IN=35V, TJ=25°C 250 mA
Dropout Voltage VD T
J=25°C 2.0 V
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
78TXXA LINEAR INTEGRATED CIRCUIT
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TYPICAL CHARACTERISTICS
0
268
2
4
6
Output Voltage vs. Input Voltage
Output Voltage, VOUT (V)
Input Voltage, VIN (V)
01 3 4 5 7
1
3
5
IOUT=0A
VOUT=5V
CIN=0.33uF
COUT=0.1uF
TA: Room Temprature
IOUT=0.25A
IOUT=1A
012345678
0
1
2
3
4
5
6
Input Voltage, VIN (V)
Circuit Operating Current, IBIAS (mA)
Circuit Operating Current vs. Input Voltage
IOUT=0A
IOUT=0.25A
IOUT=1A
VOUT=5V
CIN=0.33uF
COUT=0.1uF
TA: Room Temprature
0
2
4
6
Bias Current vs. Junction Temperature
Bias Current, IB(mA)
Junction Temperature, TJ(°C)
-25
1
3
5
-5 15 35 55 75 95 115 135 155
VIN=10V
IOUT=0A
4.5
Output Voltage vs. Junction Temperature
Output Voltage, VOUT (V)
Junction Temperature, TJ(°C)
-25 -5 15 35 55 75 95 115 135 155
4.6
4.7
4.8
4.9
5.1
5.2
5.3
5.4
5.5
VIN=10V
IOUT=5.0mA
5.0
1.8
2
1.6
1.4
1.2
1
0.8
0.6
0.4
0.2
0
-40 -20 14012010080
60
40
200
1.6
1.4
1.2
1
0.8
0.6
0.4
0.2
0
36
0369121518
21 24 27 30 33 40
Input Voltage, VIN (V)
Short Current, ISC (A)
Short Current vs. Input Voltage
Dropout Voltage, VD (V)
Junction Temperature, TJ (°C)
Dropout Voltage vs. Junction Temperature
IOUT=0.25A
IOUT=0A
IOUT=1A
78TXXA LINEAR INTEGRATED CIRCUIT
UNISONIC TECHNOLOGIES CO., LTD 9 of 9
www.unisonic.com.tw QW-R101-011.L
TYPICAL CHARACTERISTICS(Cont.)
Output Voltage
Deviation (mV)
Load Current
(mA)
Output Voltage
Deviation (mV)
Input Voltage
Change (V)
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.
