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Fairchild Semiconductor Electronic Components Datasheet

LM7905 Datasheet

3-Terminal 1A Negative Voltage Regulator

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KA79XX / KA79XXA / LM79XX
3-Terminal 1 A Negative Voltage Regulator
September 2014
Features
• Output Current in Excess of 1 A
• Output Voltages of: -5 V, -6 V, -8 V, -9 V, -12 V, -15 V,
-18 V, -24 V
• Internal Thermal Overload Protection
• Short-Circuit Protection
• Output Transistor Safe Operating Area Compensation
Description
The KA79XX / KA79XXA / LM79XX series of three-termi-
nal negative regulators are available in a TO-220 pack-
age with several fixed output voltages, making them
useful in a wide range of applications. Each type employs
internal current limiting, thermal shutdown, and safe
operating area protection.
TO-220
Input
Ordering Information
Product Number
KA7905TU
KA7906TU
KA7908TU
KA7909TU
KA7912TU
KA7915TU
KA7918TU
KA7924TU
KA7912ATU
KA7915ATU
LM7905CT
LM7908CT
LM7909CT
LM7910CT
LM7912CT
LM7915CT
LM7918CT
Output Voltage
Tolerance
±4%
±2%
±4%
© 2002 Fairchild Semiconductor Corporation
KA79XX / KA79XXA / LM79XX Rev. 1.1.1
1
1. GND 2. Input 3. Output
Package
Packing Method
Operating
Temperature
TO-220
(Dual Gauge)
Rail
0 to +125°C
TO-220
(Single Gauge)
www.fairchildsemi.com


Fairchild Semiconductor Electronic Components Datasheet

LM7905 Datasheet

3-Terminal 1A Negative Voltage Regulator

No Preview Available !

Block Diagram
GND
VOLTAGE
REFERENCE
I1
R1
R2
OOuutptut
+
Q1
-
Q2
PROTECTION
I2 CIRCUITRY
Rsc
In
Input
Figure 1. Block Diagram
Absolute Maximum Ratings
Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be opera-
ble above the recommended operating conditions and stressing the parts to these levels is not recommended. In addi-
tion, extended exposure to stresses above the recommended operating conditions may affect device reliability. The
absolute maximum ratings are stress ratings only. Values are at TA = 25°C unless otherwise noted.
Symbol
Parameter
Value
Unit
VI
RθJC
RθJA
TOPR
TSTG
Input Voltage
Thermal Resistance, Junction-Case(1)
Thermal Resistance, Junction-Air(1, 2)
Operating Temperature Range
Storage Temperature Range
-35
5
65
0 to +125
- 65 to +150
V
°C/W
°C/W
°C
°C
Notes:
1. Thermal resistance test board, size: 76.2 mm x 114.3 mm x 1.6 mm(1S0P), JEDEC standard:
JESD51-3, JESD51-7.
2. Assume no ambient airflow.
© 2002 Fairchild Semiconductor Corporation
KA79XX / KA79XXA / LM79XX Rev. 1.1.1
2
www.fairchildsemi.com


Part Number LM7905
Description 3-Terminal 1A Negative Voltage Regulator
Maker Fairchild Semiconductor
Total Page 17 Pages
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