Fairchild Semiconductor MC79M12, MC79M08, MC79M05, MC79M15 Datasheet
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MC79MXX
3-Terminal 0.5A Negative V oltage R egulator
Features
• No external components required
• Output current in excess of 0.5A
• Internal thermal overload
• Internal short circuit current limiting
• Output transistor safe area compensation
• Output voltages of -5V,-6V,-8V,-12V,-15V,-18Vand -24V
Schematic Diagram
Description
The MC79MXX series of 3-Terminal medium current
negative voltage regulators are monolithic integrated circuits
designed as fixed voltage regulators. These regulators
employ internal current limiting, thermal shutdown and safe
area compensation making them essentially indestructible.
TO-220
1
1. GND 2. Input 3. Output
©2001 Fairchild Semiconductor Corporation
Rev. 1.0.0
MC79MXX
Absolute Maximum Ratings
Parameter Symbol Value Unit
Input Voltage(for V
(for V
= -24V)
O
Thermal Resistance Junction-Cases R
Thermal Resistance Junction-Air R
Operating Temperature Range T
Storage Temperature Range T
= -5V to -18V)
O
V
I
V
I
θJC
θJA
OPR
STG
-35
-40
5 °C /W
65 °C /W
0 ~ +125 °C
-65 ~ +125 °C
Electrical Characteristics (MC79M05)
(Refer to test circuit, 0
°C ≤TJ ≤ +125
Parameter Symbol Conditions Min. Typ. Max. Unit
Output Voltage V
Line Regulation (Note1) ∆V
Load Regulation (Note1) ∆V
Quiescent Current I
Quiescent Current Change ∆I
Output Voltage Drift ∆Vo/∆TI
Output Noise Voltage V
Ripple Rejection RR
Dropout Voltage V
Short Circuit Current I
Peak Current I
°C, l
=350mA, VI = -10V,unless otherwise specified, CI =0.33µF,CO=0.1µF)
O
TJ= +25 °C -4.8 -5 -5.2
O
O
O
Q
= 5mA to 350mA
I
O
V
= -7V to -25V
I
TJ =+25°C
V
V
IO = 5mA to 500mA
T
= +25 °C
J
= -7V to -25V - 7.0 50
I
= -8V to -25V - 2.0 30
I
-4.75 -5 -5.25
- 30 100 mV
TJ= +25 °C-3.06.0mA
IO = 5mA to 350mA - - 0.4
Q
N
D
SC
PK
= 200mA
I
O
V
= -8V to -25V
I
= 5mA - -0.2 - mV/ °C
O
f = 10Hz, 100KHz
T
= +25 °C
A
f = 120Hz
V
= -8 to -18V
J
--0.4
-40-µV
54 60 - dB
TJ =+25 °C, IO = 500mA - 1.1 - V
TJ= +25 °C, VI = -35V - 140 - mA
TJ= +25 °C - 650 - mA
V
V
V
mV
mA
Note:
1. Load and line regulation are specified at constant junction temperature. Change in VO due to heating effects must be taken
into account separately. Pulse testing with low duty is used.
2
Electrical Characteristics (MC79M06)
(Refer to test circuit, 0
Parameter Symbol Conditions Min. Typ. Max. Unit
Output Voltage V
Line Regulation (Note1) ∆V
Load Regulation (Note1) ∆V
Quiescent Current I
Quiescent Current Change ∆I
Output Voltage Drift ∆V
Output Noise Voltage V
Ripple Rejection RR f = 120Hz,V
Dropout Voltage V
Short Circuit Current I
Peak Current I
°C ≤TJ ≤ +125 °C, l
O
O
O
Q
Q
/∆TIO = 5mA - 0.4 - mV/ °C
O
N
D
SC
PK
=350mA, VI = -11V,unless otherwise specified)
O
TJ= +25 °C - 5.75 - 6.0 - 6.25
= 5mA to 350mA
I
O
V
= -8.0V to -25V - 5.7 - 6.0 - 6.3
I
TJ =+25°C
TJ= +25 °CIO = 5.0mA to 500mA - 30 120 mV
TJ= +25 °C-36mA
IO = 5mA to 350mA - - 0.4
= -8V to -25V - - 0.4
V
I
f = 10Hz to 100KHz,TA = +25 °C-50-µV
IO = 500mA, TJ = +25 °C-1.1-V
VI = -35V, TJ = +25 °C - 140 - mA
TJ= +25 °C - 650 - mA
MC79MXX
V
= -8V to -25V - 7.0 60
I
= -9V to -19V - 2.0 40
V
I
= -9V to -19V 54 60 - dB
I
V
mV
mA
Note:
1. Load and line regulation are specified at constant junction temperature. Change in VO due to heating effects must be taken
into account separately. Pulse testing with low duty is used.
3
MC79MXX
Electrical Characteristics (MC79M08)
(Refer to test circuit, 0
Parameter Symbol Conditions Min. Typ. Max. Unit
Output Voltage V
Line Regulation (Note1) ∆V
Load Regulation (Note1) ∆V
Quiescent Current I
Quiescent Current Change ∆I
Output Voltage Drift ∆V
Output Noise Voltage V
Ripple Rejection RR f = 120Hz,V
Dropout Voltage V
Short Circuit Current I
Peak Current I
°C ≤TJ ≤ +125 °C, l
Q
O
SC
PK
=350mA, VI = -14V,unless otherwise specified)
O
TJ= +25 °C - 7.7 - 8.0 - 8.3
O
O
O
= 5mA to 350mA
I
O
V
= -10.5V to -25V - 7.6 - 8.0 - 8.4
I
TJ =+25°C
TJ= +25 °CIO = 5.0mA to 500mA - 30 160 mV
TJ= +25 °C-36mA
IO = 5mA to 350mA - - 0.4
Q
= -8V to -25V - - 0.4
V
I
/∆TIO = 5mA - -0.6 - mV/ °C
f = 10Hz to 100KHz,TA = +25 °C-60-µV
N
IO = 500mA, TJ = +25 °C-1.1-V
D
VI = -35V, TJ = +25 °C - 140 - mA
TJ = +25 °C - 650 - mA
V
= -10.5V to -25V - 7.0 80
I
= -11V to -21V - 2.0 50
V
I
mV
mA
= -9V to -19V 54 59 - dB
I
V
Note:
1. Load and line regulation are specified at constant junction temperature. Change in VO due to heating effects must be taken
into account separately. Pulse testing with low duty is used.
4
Electrical Characteristics (MC79M12)
(Refer to test circuit, 0
Parameter Symbol Conditions Min. Typ. Max. Unit
Output Voltage V
Line Regulation (Note1) ∆V
Load Regulation (Note1) ∆V
Quiescent Current I
Quiescent Current Change ∆I
Output Voltage Drift ∆V
Output Noise Voltage V
Ripple Rejection RR f = 120Hz,V
Dropout Voltage V
Short Circuit Current I
Peak Current I
°C ≤TJ ≤ +125 °C, l
O
O
O
Q
Q
/∆TIO = 5mA - -0.8 - mV/ °C
O
N
D
SC
PK
=350mA, VI = -19V,unless otherwise specified)
O
TJ= +25 °C -11.5 -12 -12.5
= 5mA to 350mA
I
O
V
= -14.5V to -30V -11.4 -12 -12.6
I
TJ =+25°C
TJ= +25 °CIO = 5.0mA to 500mA - 30 240 mV
TJ= +25 °C-36mA
IO = 5mA to 350mA - - 0.4
= -14.5V to -30V - - 0.4
V
I
f = 10Hz to 100KHz,TA =+25 °C-75-µV
IO = 500mA, TJ = +25 °C-1.1-V
VI = -35V, TJ = +25 °C - 140 - mA
TJ= +25 °C - 650 - mA
MC79MXX
V
= -14.5V to -30V - 8.0 80
I
= -15V to -25V - 3.0 50
V
I
= -15V to -25V 54 60 - dB
I
V
mV
mA
Note:
1. Load and line regulation are specified at constant junction temperature. Change in VO due to heating effects must be taken
into account separately. Pulse testing with low duty is used.
5
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