MC78912CT Datasheet PDF - Fairchild
| Part Number | MC78912CT | |
| Description | 3-TERMINAL 1A NEGATIVE VOLTAGE REGULATORS | |
| Manufacturers | Fairchild | |
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MC79XX (LM79XX) (KA79XX/A)
FIXED VOLTAGE REGULATOR (NEGATIVE)
3-TERMINAL 1A NEGATIVE VOLTAGE REGULATORS
The MC79XX series of three-terminal negative regulators are available in
TO-220 package and with several fixed output voltages, making them useful
in a wide range of applications. Each type employs internal current limiting,
thermal shut-down and safe area protection, making it essentially indestructible.
TO-220
FEATURES
• Output Current in Excess of 1A
• Output Voltages of -5, -6, -8, -12, -15, -18, -24V
• Internal Thermal Overload Protection
• Short Circuit Protection
• Output Transistor Safe-Area Compensation
1: GND 2: Input 3: Output
ORDERING INFORMATION
Device
MC79XXCT (LM79XXCT) (KA79XX)
KA79XXA
Output Voltage
Tolerance
± 4%
± 2%
Package
TO-220
Operating Temperature
0 ~+125°C
BLOCK DIAGRAM
GND
VOLTAGE
REFERENCE
I1
+
-
I2
R1
R2
Out
Q1
PROTECTION
CIRCUITRY
Q2
Rsc
In
©1999 Fairchild Semiconductor Corporation
Rev. C
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MC79XX (LM79XX) (KA79XX/A)
FIXED VOLTAGE REGULATOR (NEGATIVE)
LM7909 ELECTRICAL CHARACTERISTICS
(VI = 14V, lO = 500mA, 0°C ≤TJ ≤+ 125°C, CI =2.2µF, CO = 1µF, unless otherwise specified)
Characteristic
Output Voltage
Line Regulation
Load Regulation
Quiescent Current
Quiescent Current Change
Temperature Coefficient of VD
Output Noise Voltage
Ripple Rejection
Dropout Voltage
Short Circuit Current
Peak Current
Symbol
Test Conditions
VO
∆VO
∆VO
IQ
∆IQ
∆VO/∆T
VN
RR
VD
ISC
IPK
TJ =+ 25°C
IO = 5mA to 1A, PO 15W
VI = -1.5 to -23V
TJ = 25°C
VI = -10.5 to -25V
VI= -11 to -17V
TJ =+ 25°C
IO = 5mA to 1.5A
TJ =+ 25°C
IO = 250 to 750mA
TJ =+ 25°C
IO = 5mA to 1A
VI = -11.5 to -25V
IO = 5mA
f = 10Hz to 100KHz
TA =+ 25°C
f = 120Hz
∆VI = 10V
TJ=+ 25°C
IO = 1A
TJ= +25°C, VI = -35V
TJ =+25°C
Min
- 8.7
- 8.6
54
Typ
- 9.0
- 9.0
10
5
12
4
3
0.05
0.1
-0.6
175
60
2
300
2.2
Max
- 9.3
- 9.4
180
90
180
90
6
0.5
1
Unit
V
mV
mV
mA
mA
mV/°C
µV
dB
V
mA
A
* Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken
into account separately. Pulse testing with low duty is used.
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| Information | Total 15 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ MC78912CT.PDF Datasheet ] | |
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