1A Positive
Voltage Regulator
LM7833/LM7847
1A Positive Voltage Regulator
General Description
•
The TCI LM78XX family is monolithic fixed voltage regulator
integrated circuit. They are suitable for applications that
required supply current up to 1A.
•
The LM78M is available in D-PACK (TO-252) and TO-220 packages.
.
D-PACK
(TO-252)
TO-220
Features
•
•
•
•
•
•
Output Current up to 1A
Fixed output voltage of 3.3V and 4.7V available
Thermal overload shutdown protection
Short circuit current limiting
Output transistor SOA protection
RoHS Compliance
Applications
•
•
•
•
High Efficiency Linear Regulator
Post Regulation for Switching Supply
Microprocessor Power Supply
Mother Board
Ordering Information
TAITRON COMPONENTS INCORPORATED
www.taitroncomponents.com
Tel:
Fax:
(800)-TAITRON (800)-824-8766
(800)-TAITFAX (800)-824-8329
(661)-257-6060
(661)-257-6415
Rev. A/DX 2007-06-04
Page 1 of 6
1A Positive Voltage Regulator
LM7833/LM7847
Pin Configuration
Outline: D
D-PACK
(TO-252)
Outline: T
TO-220
Block Diagram
Rev. A/DX 2007-06-04
www.taitroncomponents.com
Page 2 of 6
1A Positive Voltage Regulator
LM7833/LM7847
Absolute Maximum Ratings
Symbol
V
IN
I
OUT
P
D
T
J
T
OPR
T
STG
Description
V
OUT
=3.3~18V
V
OUT
=20~24V
Output Current
D-PACK (TO-252)
Power Dissipation
TO-220
Junction Temperature
Operating Temperature Range
Storage Temperature Range
Input Voltage
Ratings
35
40
1
Internally Limited
150
-20 ~ 150
-55 ~ 150
Unit
V
A
mW
°C
°C
Note:
1. Absolute maximum ratings are stress ratings only and functional device operation is not implied.
The device could be damaged beyond Absolute maximum ratings.
2. 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 are showed as electrical
characteristics table represents pulse test conditions with junction temperatures specified at
the initiation of test.
Electrical Characteristics
(T
J
=25° C, P
D
≦15W,
unless otherwise specified)
For LM7833 (V
IN
=5.8V, I
OUT
=0.5A, C1=0.33µF, C
O
=0.1µF)
Symbol
V
OUT
∆V
OUT
∆V
OUT
I
Q
∆I
Q
eN
∆V
O
/∆
T
RR
I
PEAK
I
SC
V
D
Description
Output Voltage
Load Regulation
Line Regulation
Quiescent Current
Quiescent Current Change
Output Noise Voltage
Temperature coefficient of
V
OUT
Ripple Rejection
Peak Output Current
Short-Circuit Current
Dropout Voltage
LM7833
Min.
Typ.
Max.
Unit
V
V
mV
mV
mV
mV
mA
mA
mA
µV
mV/℃
dB
A
mA
V
Test Conditions
I
OUT
=5mA-1.0A
5.8V≤V
IN
≤18.3V,
I
OUT
=5mA-1.0A
I
OUT
=5mA-1.0A
I
OUT
=0.25A-0.75A
5.8V≤V
IN
≤18.3V
5.8V≤V
IN
≤18.3V,
I
OUT
=1.0A
I
OUT
≦1.0A
5.8V≤V
IN
≤18.3V
I
OUT
=5mA-1.0A
10Hz≤f≤100KHz
I
OUT
=5mA
6.3V≤V
IN
≤16.3V,
f=120Hz
-
V
IN
=35V
-
Rev. A/DX 2007-06-04
3.168
3.135
-
-
-
-
-
-
-
-
-
-
-
-
-
3.30
-
-
-
-
-
-
-
-
55
-0.4
57
1.8
250
2.0
3.432
3.465
33
17
33
33
8.0
1.0
0.5
-
-
-
-
-
-
www.taitroncomponents.com
Page 3 of 6
1A Positive Voltage Regulator
LM7833/LM7847
For LM7847 (V
IN
=9.7V, I
OUT
=0.5A, C1=0.33µF, C
O
=0.1µF)
LM7847
Symbol
Description
Min.
Typ.
Max.
Unit
V
V
mV
mV
mV
mV
mA
mA
mA
µV
mV/℃
dB
A
mA
V
Test Conditions
I
OUT
=5mA-1.0A
7.2V≤V
IN
≤19.7V,
I
OUT
=5mA-1.0A
I
OUT
=5mA-1.0A
I
OUT
=0.25A-0.75A
7.2V≤V
IN
≤19.7V
7.2V≤V
IN
≤19.7V,
I
OUT
=1.0A
I
OUT
≦1.0A
7.2V≤V
IN
≤19.7V
I
OUT
=5mA-1.0A
10Hz≤f≤100KHz
I
OUT
=5mA
7.7V≤V
IN
≤17.7V,
f=120Hz
-
V
IN
=35V
-
V
OUT
∆V
OUT
∆V
OUT
I
Q
∆I
Q
eN
∆V
O
/∆
T
RR
I
PEAK
I
SC
V
D
Output Voltage
Load Regulation
Line Regulation
Quiescent Current
Quiescent Current Change
Output Noise Voltage
Temperature coefficient of
V
OUT
Ripple Rejection
Peak Output Current
Short-Circuit Current
Dropout Voltage
4.512
4.465
-
-
-
-
-
-
-
-
-
62
-
-
-
4.70
-
-
-
-
-
-
-
-
40
-0.6
80
1.8
250
2.0
4.888
4.935
47
24
47
47
8.0
1.0
0.5
-
-
-
-
-
-
Typical Application
Rev. A/DX 2007-06-04
www.taitroncomponents.com
Page 4 of 6
1A Positive Voltage Regulator
LM7833/LM7847
Dimensions in mm (inches)
D-PACK
(TO-252)
TO-220
Rev. A/DX 2007-06-04
www.taitroncomponents.com
Page 5 of 6
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