Fairchild Semiconductor KA7912, KA7905 Datasheet
MC79XX (LM79XX) (KA79XX/A) FIXED VOLTAGE REGULATOR (NEGATIVE)
VOLTAGE
REFERENCE
+
-
PROTECTION
CIRCUITRY
R1
R2
GND
I1
I2
Out
In
Q1
Q2
ORDERING INFORMATION
BLOCK DIAGRAM
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
Device Output Voltage
MC79XXCT (LM79XXCT) (KA79XX)
KA79XXA
Tolerance
± 4%
± 2%
Package Operating Temperature
TO-220
0 ~+125°C
Rsc
1999 Fairchild Semiconductor Corporation
Rev. C
MC79XX (LM79XX) (KA79XX/A) FIXED VOLTAGE REGULATOR (NEGATIVE)
Load Regulation
∆
∆
mV
∆
ABSOLUTE MAXIMUM RATINGS (T
=+25°C, unless otherwise specified)
A
Characteristic Symbol Value Unit
Input Voltage V
Thermal Resistance Junction-Cases
Junction-Air
Operating Temperature Range T
Storage Temperature Range T
I
R
θJC
R
θJA
OPR
STG
0 ~ +125
- 65 ~ +150
LM7905 ELECTRICAL CHARACTERISTICS
(V
= 10V, lO = 500mA, 0°C ≤TJ ≤ +125°C, CI =2.2µF, CO =1µF, unless otherwise specified.)
I
Characteristic Symbol Test Conditions Min Typ Max Unit
TJ =+25°C
Output Voltage V
Line Regulation
Quiescent Current I
Quiescent Current Change
Temperature Coefficient of V
D
∆VO/∆T
Output Noise Voltage V
Ripple Rejection RR
Dropout Voltage V
Short Circuit Current I
Peak Current I
* Load and line regulation are specified at constant junction temperature. Changes in V
taken into account separately. Pulse testing with low duty is used.
IO = 5mA to 1A, PO 15W
O
VI = -7 to -20V
VI = -7 to -20V
IO=1A
VI = -8 to -12V
IO=1A
V
O
TJ =25°C
VI = -7.5 to -25V
VI= -8 to -12V
IO=1A
IO = 5mA to 1.5A
TJ =+25°C
V
O
IO = 250 to 750mA
TJ =+25°C
Q
IO = 5mA to 1A 0.05 0.5
I
Q
VI = -8 to -25V 0.1 0.8
IO = 5mA - 0.4
f = 10Hz to 100KHz
N
TA =+25°C
f = 120Hz, IO = -35V
∆VI = 10V
TJ=+25°C
D
IO = 1A
TJ =+25°C, VI = -35V
SC
TJ =+25°C
PK
-35 V
5
65
°C / W
°C /W
- 4.8 - 5.0 - 5.2
- 4.75 -5.0 - 5.25
5 50
2 25
7 50
7 50
10 100
3 50
3 6 mA
40
54 60 dB
2 V
300 mA
2.2 A
due to heating effects must be
O
°C
°C
V
mV
mA
mV/°C
µV
MC79XX (LM79XX) (KA79XX/A) FIXED VOLTAGE REGULATOR (NEGATIVE)
∆
∆
∆
LM7906 ELECTRICAL CHARACTERISTICS
(V
= 11V, lO = 500mA, 0°C ≤TJ≤ +125°C, CI =2.2µF, CO = 1µF, unless otherwise specified.)
I
Characteristic Symbol Test Conditions Min Typ Max Unit
TJ = +25°C
Output Voltage V
IO = 5mA to 1A, PO 15W
O
VI = - 9 to - 21V
Line Regulation
TJ = 25°C
V
O
VI = - 8 to - 25V 10 120
VI= - 9 to -12V 5 60
TJ =+ 25°C
Load Regulation mV
V
O
IO = 5mA to 1.5A
TJ =+ 25°C
IO = 250 to 750mA
Quiescent Current I
Quiescent Current Change
Temperature Coefficient of V
D
∆VO/∆T
Output Noise Voltage V
Ripple Rejection RR
Dropout Voltage V
Short Circuit Current I
Peak Current I
* Load and line regulation are specified at constant junction temperature. Changes in V
taken into account separately. Pulse testing with low duty is used.
TJ =+ 25°C
Q
IO = 5mA to 1A 0.5
I
Q mA
VI = -9 to -25V 1.3
IO = 5mA -0.5
f = 10Hz to 100KHz
N
TA =+ 25°C
f = 120Hz
∆VI = 10V
TJ=+ 25°C
D
IO = 1A
TJ= +25°C, VI = -35V
SC
TJ= +25°C
PK
- 5.75 - 6 - 6.25
- 5.7 - 6 - 6.3
10 120
3 60
3 6 mA
130
54 60 dB
2 V
300 mA
2.2 A
due to heating effects must be
O
V
mV
mV/°C
µV
MC79XX (LM79XX) (KA79XX/A) FIXED VOLTAGE REGULATOR (NEGATIVE)
∆
∆
∆
LM7908 ELECTRICAL CHARACTERISTICS
(V
= 14V, lO = 500mA, 0°C ≤TJ ≤ +125°C, CI =2.2µF, CO = 1µF, unless otherwise specified.)
I
Characteristic Symbol Test Conditions Min Typ Max Unit
TJ =+ 25°C
Output Voltage V
IO = 5mA to 1A, PO 15W
O
VI = -1.5 to -23V
Line Regulation
V
TJ = 25°C
O
VI = -10.5 to -25V 10 100
VI= -11 to -17V 5 80
TJ =+ 25°C
IO = 5mA to 1.5A
Load Regulation
V
O
TJ =+ 25°C
IO = 250 to 750mA
Quiescent Current I
Quiescent Current Change
Temperature Coefficient of V
∆VO/∆T
D
Output Noise Voltage V
Ripple Rejection RR
Dropout Voltage V
Short Circuit Current I
Peak Current I
* Load and line regulation are specified at constant junction temperature. Changes in V
into account separately. Pulse testing with low duty is used.
TJ =+ 25°C
Q
IO = 5mA to 1A 0.05 0.5
I
Q
VI = -11.5 to -25V 0.1 1
IO = 5mA -0.6
f = 10Hz to 100KHz
N
TA =+ 25°C
f = 120Hz
∆VI = 10V
TJ=+ 25°C
D
IO = 1A
TJ=+ 25°C, VI = -35V
SC
TJ=+ 25°C
PK
- 7.7 - 8 - 8.3
- 7.6 - 8 - 8.4
12 160
4 80
3 6 mA
mV/°C
175
54 60 dB
2 V
300 mA
2.2 A
due to heating effects must be taken
O
V
mV
mV
mA
µV
MC79XX (LM79XX) (KA79XX/A) FIXED VOLTAGE REGULATOR (NEGATIVE)
∆
∆
Quiescent Current Change
∆
mA
LM7909 ELECTRICAL CHARACTERISTICS
(V
= 14V, lO = 500mA, 0°C ≤TJ ≤+ 125°C, CI =2.2µF, CO = 1µF, unless otherwise specified)
I
Characteristic Symbol Test Conditions Min Typ Max Unit
TJ =+ 25°C
Output Voltage V
IO = 5mA to 1A, PO 15W
O
VI = -1.5 to -23V
Line Regulation
V
TJ = 25°C
O
VI = -10.5 to -25V 10 180
VI= -11 to -17V 5 90
TJ =+ 25°C
IO = 5mA to 1.5A
Load Regulation
V
O
TJ =+ 25°C
IO = 250 to 750mA
Quiescent Current I
Temperature Coefficient of V
∆VO/∆T
D
Output Noise Voltage V
Ripple Rejection RR
Dropout Voltage V
Short Circuit Current I
Peak Current I
* Load and line regulation are specified at constant junction temperature. Changes in V
into account separately. Pulse testing with low duty is used.
TJ =+ 25°C
Q
IO = 5mA to 1A 0.05 0.5
I
Q
VI = -11.5 to -25V 0.1 1
IO = 5mA -0.6
f = 10Hz to 100KHz
N
TA =+ 25°C
f = 120Hz
∆VI = 10V
TJ=+ 25°C
D
IO = 1A
TJ= +25°C, VI = -35V
SC
TJ =+25°C
PK
- 8.7 - 9.0 - 9.3
- 8.6 - 9.0 - 9.4
12 180
4 90
3 6 mA
mV/°C
175
54 60 dB
2 V
300 mA
2.2 A
due to heating effects must be taken
O
V
mV
mV
µV
Loading...