MC78918CT 반도체 회로 부품 판매점
3-TERMINAL 1A NEGATIVE VOLTAGE REGULATORS
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 Fairchild |
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
MC79XX (LM79XX) (KA79XX/A)
FIXED VOLTAGE REGULATOR (NEGATIVE)
ABSOLUTE MAXIMUM RATINGS (TA=+25°C, unless otherwise specified)
Characteristic
Input Voltage
Thermal Resistance Junction-Cases
Junction-Air
Operating Temperature Range
Storage Temperature Range
Symbol
VI
RθJC
RθJA
TOPR
TSTG
Value
-35
5
65
0 ~ +125
- 65 ~ +150
Unit
V
°C / W
°C /W
°C
°C
LM7905 ELECTRICAL CHARACTERISTICS
(VI = 10V, 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
VO
∆VO
∆VO
IQ
∆IQ
∆VO/∆T
VN
RR
VD
ISC
IPK
Test Conditions
TJ =+25°C
IO = 5mA to 1A, PO 15W
VI = -7 to -20V
VI = -7 to -20V
TJ =25°C
IO=1A
VI = -8 to -12V
IO=1A
VI = -7.5 to -25V
VI= -8 to -12V
IO=1A
IO = 5mA to 1.5A
TJ =+25°C
IO = 250 to 750mA
TJ =+25°C
IO = 5mA to 1A
VI = -8 to -25V
IO = 5mA
f = 10Hz to 100KHz
TA =+25°C
f = 120Hz, IO = -35V
∆VI = 10V
TJ=+25°C
IO = 1A
TJ =+25°C, VI = -35V
TJ =+25°C
Min
- 4.8
- 4.75
Typ
- 5.0
-5.0
5
Max
- 5.2
- 5.25
50
2 25
Unit
V
mV
7 50
7 50
10
3
3
0.05
0.1
- 0.4
40
100
50
6
0.5
0.8
mV
mA
mA
mV/°C
µV
54 60
dB
2V
300 mA
2.2 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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MC78918CT regulator
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