UNISONIC TECHNOLOGIES CO., LTD
78RXX
LOW DROPOUT VOLTAGE
REGULATOR
1
LINEAR INTEGRATED CIRCUIT
DESCRIPTION
TO-220B
As the UTC linear integrated LDO, the UTC
78RXX
shows a
high current, high accuracy, and specially low-dropout voltage. The
features are: maximum 500mV dropout voltage, very low ground
current. Cause the series have been designed for high current
loads, so they are also used in lower current, extremely low
dropout-critical systems (in which their tiny dropout voltage and
ground current values are important attributes).
1
TO-220F-4
FEATURES
1
TO-252-5
* I
OUT
=1A ; V
OUT
=3.3V,5V,9V,12V (typ)
* With ADJ version
* Internal overcurrent protection, internal thermal shutdown
* Internal overvoltage protection, internal short-circuit protection
* Output disable function
1
TO-252
ORDERING INFORMATION
Package
TO-220B
TO-220F-4
TO-252
TO-252-5
Packing
Tube
Tube
Tape Reel
Tape Reel
Ordering Number
Lead Free
Halogen Free
78RXXL-TB5-T
78RXXG-TB5-T
78RXXL-TF4-T
78RXXG-TF4-T
78RXXL-TN3-R
78RXXG-TN3-R
78RXXL-TN5-R
78RXXG-TN5-R
Note: xx: output voltage, refer to Marking Information
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QW-R102-035.G
78RXX
MARKING INFORMATION
PACKAGE
TO-220F-4
TO-252
TO-252-5
VOLTAGE CODE
3 3 : 3.3V
0 5 : 5.0V
0 9 : 9.0V
1 2 : 12V
3 3 : 3.3V
0 5 : 5.0V
0 9 : 9.0V
1 2 : 12V
0 0 : ADJ
LINEAR INTEGRATED CIRCUIT
MARKING
TO-220B
PIN DESCRIPTIONS
TO-252-5
1
3
5
2
-
4
PIN NAME
V
IN
V
OUT
GND
V
DIS
ADJ
NC
PIN FUNCTION
Input voltage pin
Output voltage pin
GND
Disable signal input pin
Adjustable input pin ( FOR TO-220B )
PIN NO.
TO-220F-4/TO-220B
TO-252
1
1
2
3
3
2
4
-
5
-
-
-
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QW-R102-035.G
78RXX
BLOCK DIAGRAM
Fixed Output Voltage Versions
LINEAR INTEGRATED CIRCUIT
Overvoltage
Protection
V
IN
Bandgap
Reference
-
+
Thermal
Shutdown
SOA
Protection
R
1
Q
1
V
OUT
Short-Circuit
Protection
High/Low
-
R
2
+
Output
ON/OFF
1.4V
GND
V
DIS
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www.unisonic.com.tw
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QW-R102-035.G
78RXX
BLOCK DIAGRAM
Adjustable Output Voltage Version
LINEAR INTEGRATED CIRCUIT
Overvoltage
Protection
V
IN
Bandgap
Reference
-
+
Thermal
Shutdown
SOA
Protection
Q
1
V
OUT
Short-Circuit
Protection
High/Low
-
+
Output
ON/OFF
1.4V
GND
ADJ
V
DIS
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QW-R102-035.G
78RXX
PARAMETER
SYMBOL
V
IN
V
DIS
I
OUT
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS
(Operating temperature range applies unless otherwise specified. )
RATINGS
UNITS
Input Voltage
35
V
Disable Voltage
35
V
Output Current
1.0
A
TO-220B/TO-220F-4
1.5
W
Power Dissipation
P
D
TO-252/TO-252-5
1
W
Junction Temperature
T
J
+150
°C
Operating Temperature
T
OPR
-40 ~ +85
°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
SYMBOL
θ
JA
θ
JC
RATING
62.5
110
4
12
UNIT
°C/W
°C/W
°C/W
°C/W
PARAMETER
TO-220B/TO-220F-4
Junction to Ambient
TO-252/TO-252-5
TO-220B/TO-220F-4
Junction to Case
TO-252/TO-252-5
ELECTRICAL CHARACTERISTICS
(I
OUT
=0.5A, T
A
= 25°C,unless otherwise specified)
SYMBOL
V
OUT
V
D
V
OUT
V
OUT
I
Q
RR
V
DISH
V
DISL
I
DISH
I
DISL
SYMBOL
V
OUT
V
D
V
OUT
V
OUT
I
Q
RR
V
DISH
V
DISL
I
DISH
I
DISL
CONDITIONS
V
IN
= 5V
I
OUT
= 1A
5mA < I
OUT
< 1A
4V < V
IN
< 10V
I
OUT
= 0 A
(Note)
Output Active
Output Disabled
V
DIS
= 2.7V
V
DIS
= 0.4V
CONDITIONS
V
IN
= 7V
I
OUT
= 1A
5mA < I
OUT
< 1A
6V < V
IN
< 12V
I
OUT
= 0 A
(Note)
Output Active
Output Disabled
V
DIS
= 2.7V
V
DIS
= 0.4V
MIN
3.22
TYP
3.3
0.1
0.5
45
2.0
55
MAX UNITS
3.38
V
0.5
V
2.0
％
2.5
％
10
mA
dB
V
0.8
V
0.02
mA
-0.4
mA
MAX UNITS
5.12
V
0.5
V
2.0
％
2.5
%
10
mA
dB
V
0.8
V
0.02
mA
-0.4
mA
For 78R33
(V
IN
=5V)
PARAMETER
Output Voltage
Dropout Voltage
Load Regulation
Line Regulation
Quiescent Current
Ripple Rejection
Disable Voltage
Disable Bias Current
For 78R05
(V
IN
=7V)
PARAMETER
Output Voltage
Dropout Voltage
Load Regulation
Line Regulation
Quiescent Current
Ripple Rejection
Disable Voltage
Disable Bias Current
High
Low
High
Low
High
Low
High
Low
MIN
4.88
TYP
5
0.1
0.5
45
2.0
55
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QW-R102-035.G
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