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PDF MC79L24CP Data sheet ( Hoja de datos )
| Número de pieza | MC79L24CP | |
| Descripción | THREE-TERMINAL LOW CURRENT NEGATIVE FIXED VOLTAGE REGULATORS | |
| Fabricantes | Motorola Semiconductors | |
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Order this document by MC79L00/D
Three-Terminal Low Current
Negative Voltage Regulators
The MC79L00, A Series negative voltage regulators are inexpensive,
easy–to–use devices suitable for numerous applications requiring up to100
mA. Like the higher powered MC7900 Series negative regulators, this series
features thermal shutdown and current limiting, making them remarkably
rugged. In most applications, no external components are required for
operation.
The MC79L00 devices are useful for on–card regulation or any other
application where a regulated negative voltage at a modest current level is
needed. These regulators offer substantial advantage over the common
resistor/zener diode approach.
• No External Components Required
• Internal Short Circuit Current Limiting
• Internal Thermal Overload Protection
• Low Cost
• Complementary Positive Regulators Offered (MC78L00 Series)
• Available in Either ±5% (AC) or ±10% (C) Selections
MC79L00, A
Series
THREE–TERMINAL LOW
CURRENT NEGATIVE FIXED
VOLTAGE REGULATORS
SEMICONDUCTOR
TECHNICAL DATA
P SUFFIX
PLASTIC PACKAGE
CASE 29
Pin 1. Ground
2. Input
3. Output
1
2
3
Representative Schematic Diagram
R6
R
R8
Q10
5 Q5
R18
R1
Q4
R9
Gnd
R17
R7
Q1
R2
Z1
R3
R4
Q8 Q14
Q9
R16
Output
Q12
C Q2
Q13
Q6 Q7 Q11
R10 R11
R14 R15
Input
* Automotive temperature range selections are available with special test conditions
* and additional tests in 5, 12 and 15 V devices. Contact your local Motorola sales
* office for information.
8
1
Pin 1. Vout
2. Vin
3. Vin
4. NC
D SUFFIX
PLASTIC PACKAGE
CASE 751
(SOP–8)*
5. GND
6. Vin
7. Vin
8. NC
* SOP–8 is an internally modified SO–8 package.
Pins 2, 3, 6, and 7 are electrically common to the
die attach flag. This internal lead frame modifica-
tion decreases package thermal resistance and
increases power dissipation capability when
appropriately mounted on a printed circuit board.
SOP–8 conforms to all external dimensions of the
standard SO–8 package.
Device No.
±10%
MC79L05C
MC79L12C
MC79L15C
MC79L18C
MC79L24C
Device No.
5%
MC79L05AC
MC79L12AC
MC79L15AC
MC79L18AC
MC79L24AC
Nominal
Voltage
–5.0
–12
–15
–18
–24
ORDERING INFORMATION
Device
MC79LXXACD*
Operating
Temperature Range
Package
SOP–8
MC79LXXACP
MC79LXXCP
MC79LXXABD*
MC79LXXABP*
TJ = 0° to +125°C
TJ = –40° to +125°C
Plastic Power
Plastic Power
SOP–8
Plastic Power
XX indicates nominal voltage
MOTOROLA ANALOG IC DEVICE DATA
© Motorola, Inc. 1996
Rev 2
1
1 page  
MC79L00, A Series
TYPICAL CHARACTERISTICS
(TA = +25°C, unless otherwise noted.)
Figure 3. Dropout Characteristics
8.0
MC79L05C
6.0
VO = –5.0 V
TJ = 25°C
IO = 1.0 mA
IO = 100 mA
4.0
2.0
IO = 40 mA
0
0 –2.0 –4.0 –6.0 –0.8 –10
Vin, INPUT VOLTAGE (V)
Figure 4. Dropout Voltage versus
Junction Temperature
–2.5
–2.0 IO = 70 mA
–1.5
–1.0
Dropout of Regulation is
defined when
–0.5 ∆VO = 2% of VO
IO = 1.0 mA
IO = 40 mA
0
0 25 50 75 100 125
TJ, JUNCTION TEMPERATURE (°C)
Figure 5. Input Bias Current versus
Ambient Temperature
4.2
4.0
3.8
3.6
3.4
MC79L05C
3.2 Vin = –10 V
VO = –5.0 V
3.0 IO = 40 mA
0
0 25 50 75 100
TA, AMBIENT TEMPERATURE (°C)
125
Figure 6. Input Bias Current versus
Input Voltage
5.0
4.0
3.0
MC79L05C
VO = –5.0 V
2.0 IO = 40 mA
1.0
0
0 –5.0 –10 –15 –20 –25 –30 –35 –40
Vin, INPUT VOLTAGE (V)
Figure 7. Maximum Average Power Dissipation
versus Ambient Temperature (TO–92)
10,000
1,000
No Heatsink
100
RΘJA = 200°C/W
PD(max) to 25°C = 625 mW
10
25 50 75
100
125
TA, AMBIENT TEMPERATURE (°C)
150
Figure 8. SOP–8 Thermal Resistance and Maximum
Power Dissipation versus P.C.B. Copper Length
170 3.2
150 2.8
PD(max) for TA = +50°C
130 2.4
110 Graph represents symmetrical layout 2.0
ÎÎÎÎÎÎÎÎÎÎÎÎÎ90
L
2.0 oz.
Copper
1.6
70 1.2
ÎÎÎ ÎÎÎL 3.0mm
50 0.8
RθJA
30 0.4
0 10 20 30 40 50
L, LENGTH OF COPPER (mm)
MOTOROLA ANALOG IC DEVICE DATA
5
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