Datasheet

UNISONIC TECHNOLOGIES CO., LTD
79DXXAA
LINEAR INTEGRATED CIRCUIT
3 TERMINAL 1.5A NEGATIVE
VOLTAGE REGULATOR

DESCRIPTION
The UTC 79DXXAA series of three-terminal negative
regulators is available several fixed output voltage, making them
useful in a wide range of application. Each type employs internal
current limiting, thermal shut-down, making it essentially
indestructible.

FEATURES
* Output current up to 1.5A
* -5V, -12V output voltage available
* Thermal overload protection

NORDERING INFORMATIO
Ordering Number
Lead Free
Halogen Free
79DXXAAL-TM3-T
79DXXAAG-TM3-T
79DXXAAL-TN3-T
79DXXAAG-TN3-T
79DXXAAL-TN3-R
79DXXAAG-TN3-R
Note: Pin Assignment : G: GND I: Input O: Output
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Copyright © 2013 Unisonic Technologies Co., Ltd
Package
TO-251
TO-252
TO-252
Pin Assignment
1
2
3
G
I
O
G
I
O
G
I
O
Packing
Tube
Tube
Tape Reel
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QW-R101-042.B
79DXXAA


LINEAR INTEGRATED CIRCUIT
MARKING INFORMATION
PACKAGE
VOLTAGE CODE
TO-251
TO-252
05:-5V
12:-12V
MARKING
BLOCK DIAGRAM
GND
R1
R2
OUTPUT
Voltage
Reference
Protection
Circuitry
RSC
INPUT
Fig.1
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R101-042.B
79DXXAA

LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS (TA=25C)
PARAMETER
SYMBOL
RATING
UNIT
Input Voltage
VIN
-35
V
Output Current
IOUT
1.5
A
Power Dissipation
PD
Internally Limited
W
Operating Temperature
TOPR
0 ~ +125
C
Storage Temperature
TSTG
-65 ~ +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.

THERMAL DATA
PARAMETER
Junction to Ambient
Junction to Case

SYMBOL
θJA
θJC
RATING
112
12.5
UNIT
C/W
C/W
ELECTRICAL CHARACTERISTICS
(IOUT=0.5A, TJ=0C~125C, CI=2.2uF, CO=1uF, unless otherwise specified)
For UTC 79D05AA (VIN=-10V)
PARAMETER
Quiescent Current
Output Noise Voltage
Output Voltage Drift
Ripple Rejection
Peak Current
TEST CONDITIONS
MIN
TJ=25C -4.80
VOUT
VIN=-7V~-20V
-4.75
IOUT=5mA~1.5A, PD≦15W
VD
IOUT=1.5A
TJ=25C
TJ=25C
VIN=-7V~-25V
 VOUT
VIN=-8V~-12V
TJ=25C
TJ=25C
IOUT=5mA~1.5A
 VOUT
IOUT=250mA~750mA
TJ=25C
IQ
TJ=25C
eN
f=10Hz~100kHz
TA=25C
 VOUT/T IOUT=5mA
RR
VIN=-8V~-18V, f=120Hz
54
IPEAK
TJ=25C
For UTC 79D12AA (VIN=-18V)
PARAMETER
SYMBOL
Output Voltage
Dropout Voltage
Line Regulation
Load Regulation
SYMBOL
Output Voltage
VOUT
Dropout Voltage
VD
Line Regulation
VOUT
Load Regulation
VOUT
Quiescent Current
Output Noise Voltage
Output Voltage Drift
Ripple Rejection
Peak Current
IQ
eN
VOUT/T
RR
IPEAK
2
10
4
10
3
3
100
-0.4
60
2.2
MAX
-5.20
UNIT
V
-5.25
V
100
50
100
50
6
V
mV
mV
mV
mV
mA
μV
mV/C
dB
A
TEST CONDITIONS
MIN
TYP MAX UNIT
V
TJ=25C -11.52 -12.0 -12.48
VIN=-14.5V~-27V,
-11.40
-12.60
V
IOUT=5mA~1.5A, PD≦15W
IOUT=1.5A
TJ=25C
2
V
VIN =-14.5V~-30V
TJ=25C
12
240
mV
VIN =-16V~-22V
TJ=25C
6
120
mV
IOUT=5mA~1.5A
TJ=25C
12
240
mV
IOUT=250mA~750mA
TJ=25C
4
120
mV
TJ=25C
3
6
mA
f=10Hz~100kHz
Ta=25C
200
μV
IOUT=5mA
-0.8
mV/C
VIN=-15V~-25V, f=120Hz
54
60
dB
TJ=25C
2.2
A
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
TYP
-5.0
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QW-R101-042.B
79DXXAA

LINEAR INTEGRATED CIRCUIT
APPLICATION CIRCUITS
-VIN
2
UTC 79DXXAA 3
1
CI
2.2 μF
-VOUT
CO
1 μF
Fig.1 Fixed output regulator
C3
2.5 μF
CI
2.2 μF
R1
CO
1 μF
1
2
UTC 79DXXAA
3
R2
-VIN
-VOUT
Fig.2 Circuit for increasing output voltage
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.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R101-042.B
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