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기능 Three-Terminal Low Current Positive Voltage Regulators
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MC78L08ABD 데이터시트, 핀배열, 회로
MC78L00A Series
Three-Terminal Low Current
Positive Voltage Regulators
The MC78L00A Series of positive voltage regulators are
inexpensive, easy–to–use devices suitable for a multitude of
applications that require a regulated supply of up to 100 mA. Like
their higher powered MC7800 and MC78M00 Series cousins, these
regulators feature internal current limiting and thermal shutdown
making them remarkably rugged. No external components are
required with the MC78L00 devices in many applications.
These devices offer a substantial performance advantage over the
traditional zener diode–resistor combination, as output impedance
and quiescent current are substantially reduced.
Wide Range of Available, Fixed Output Voltages
Low Cost
Internal Short Circuit Current Limiting
Internal Thermal Overload Protection
No External Components Required
Complementary Negative Regulators Offered (MC79L00A Series)
Representative Schematic Diagram
15k
Q1
3.8k
Q3 Q5
Q4 Q6
Input
Q11
Q12
Q10
5.0k 3.0 Output
0–25k
1.2k
Z1 Q2
420
1.9k 19k 2.2k
C Q9
Q8
Q7
1.0k
2.85k
Ground
Standard Application
Input
Cin*
0.33µF
MC78LXXA
Output
CO**
A common ground is required between the input and the output voltages. The
input voltage must remain typically 2.0 V above the output voltage even during
the low point on the input ripple voltage.
*Cin is required if regulator is located an *appreciable distance from power
supply filter.
**CO is not needed for stability; however, it does *improve transient response.
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Pin: 1. Output
2. Ground
1 3. Input
2
3
TO–92
P SUFFIX
CASE 29
8
1
SOP–8*
D SUFFIX
CASE 751
*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 modification decreases
package thermal resistance and increases power
dissipation capability when appropriately mounted on
a printed circuit board. SOP–8 conforms to all exter-
nal dimensions of the standard SO–8 package.
PIN CONNECTIONS
VOUT 1
GND 2
GND 3
NC 4
8 VIN
7 GND
6 GND
5 NC
(Top View)
DEVICE TYPE/NOMINAL VOLTAGE
5% Output Voltage Accuracy
Voltage
MC78L05AC
MC78L08AC
MC78L09AC
MC78L12AC
MC78L15AC
MC78L18AC
MC78L24AC
5.0
8.0
9.0
12
15
18
24
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 7 of this data sheet.
© Semiconductor Components Industries, LLC, 1999
October, 1999 – Rev. 0
1
Publication Order Number:
MC78L00A/D




MC78L08ABD pdf, 반도체, 판매, 대치품
MC78L00A Series
ELECTRICAL CHARACTERISTICS (VI = 19 V, IO = 40 mA, CI = 0.33 µF, CO = 0.1 µF, – 40°C < TJ < +125°C (for MC78LXXAB),
0°C < TJ < +125°C (for MC78LXXAC), unless otherwise noted.)
MC78L12AC, AB
Characteristics
Symbol Min Typ Max Unit
Output Voltage (TJ = +25°C)
Line Regulation
(TJ = +25°C, IO = 40 mA)
14.5 Vdc VI 27 Vdc
16 Vdc VI 27 Vdc
VO 11.5 12 12.5 Vdc
Regline
mV
– 120 250
– 100 200
Load Regulation
(TJ = +25°C, 1.0 mA IO 100 mA)
(TJ = +25°C, 1.0 mA IO 40 mA)
Regload
mV
20 100
10 50
Output Voltage
(14.5 Vdc VI 27 Vdc, 1.0 mA IO 40 mA)
(VI = 19 V, 1.0 mA IO 70 mA)
VO Vdc
11.4 – 12.6
11.4 – 12.6
Input Bias Current
(TJ = +25°C)
(TJ = +125°C)
IIB mA
– 4.2 6.5
– – 6.0
Input Bias Current Change
(16 Vdc VI 27 Vdc)
(1.0 mA IO 40 mA)
IIB mA
– – 1.5
– – 0.1
Output Noise Voltage
(TA = +25°C, 10 Hz f 100 kHz)
Vn – 80 – µV
Ripple Rejection (IO = 40 mA,
f = 120 Hz, 15 V VI 25 V, TJ = +25°C)
RR 37 42 – dB
Dropout Voltage
(TJ = +25°C)
VI – VO – 1.7 – Vdc
ELECTRICAL CHARACTERISTICS (VI = 23 V, IO = 40 mA, CI = 0.33 µF, CO = 0.1 µF, – 40°C < TJ < +125°C (for MC78LXXAB),
S 0°C < TJ < +125°C (for MC78LXXAC), unless otherwise noted.)
MC78L15AC, AB
Characteristics
Symbol Min Typ Max Unit
Output Voltage (TJ = +25°C)
Line Regulation
(TJ = +25°C, IO = 40 mA)
17.5 Vdc VI 30 Vdc
20 Vdc VI 30 Vdc
Load Regulation
(TJ = +25°C, 1.0 mA IO 100 mA)
(TJ = +25°C, 1.0 mA IO 40 mA)
Output Voltage
(17.5 Vdc VI 30 Vdc, 1.0 mA IO 40 mA)
(VI = 23 V, 1.0 mA IO 70 mA)
Input Bias Current
(TJ = +25°C)
(TJ = +125°C)
Input Bias Current Change
(20 Vdc VI 30 Vdc)
(1.0 mA IO 40 mA)
Output Noise Voltage
(TA = +25°C, 10 Hz f 100 kHz)
Ripple Rejection (IO = 40 mA,
f = 120 Hz, 18.5 V VI 28.5 V, TJ = +25°C)
Dropout Voltage
(TJ = +25°C)
VO 14.4 15 15.6 Vdc
Regline
mV
– 130 300
– 110 250
Regload
mV
25 150
12 75
VO Vdc
14.25 – 15.75
14.25 – 15.75
IIB mA
– 4.4 6.5
– – 6.0
IIB mA
– – 1.5
– – 0.1
Vn – 90 – µV
RR 34 39 – dB
VI – VO – 1.7 – Vdc
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MC78L08ABD 전자부품, 판매, 대치품
MC78L00A Series
APPLICATIONS INFORMATION
Design Considerations
The MC78L00A Series of fixed voltage regulators are
designed with Thermal Overload Protection that shuts
down the circuit when subjected to an excessive power
overload condition. Internal Short Circuit Protection limits
the maximum current the circuit will pass.
In many low current applications, compensation
capacitors are not required. However, it is recommended
that the regulator input be bypassed with a capacitor if the
regulator is connected to the power supply filter with long
wire lengths, or if the output load capacitance is large. The
input bypass capacitor should be selected to provide good
high–frequency characteristics to insure stable operation
under all load conditions. A 0.33 µF or larger tantalum,
mylar, or other capacitor having low internal impedance at
high frequencies should be chosen.The bypass capacitor
should be mounted with the shortest possible leads directly
across the regulators input terminals. Good construction
techniques should be used to minimize ground loops and
lead resistance drops since the regulator has no external
sense lead. Bypassing the output is also recommended.
Figure 7. Current Regulator
Figure 8. ± 15 V Tracking Voltage Regulator
Input
0.33µF
MC78L05A
R
Constant
Current to
IO Grounded Load
The MC78L00 regulators can also be used as a current source
when connected as above. In order to minimize dissipation the
MC78L05C is chosen in this application. Resistor R determines
the current as follows:
IO =
5.0 V
R
+
IB
IIB = 3.8 mA over line and load changes
For example, a 100 mA current source would require R to be a
50 , 1/2 W resistor and the output voltage compliance would be
the input voltage less 7 V.
+20V
0.33µF
0.33µF
20V
MC78L15A
7 –2
6
MC1741
+3
4
6.5
MPS U55
MPS A70
+VO
10k
10k
–VO
Figure 9. Positive and Negative Regulator
+VI
0.33µF
MC78LXXA
+VO
0.1µF
–VI
0.33µF
MC79LXXA
0.1µF
–VO
Device
ORDERING INFORMATION
Operating
Temperature Range
Package
Shipping
MC78LXXACD*
MC78LXXACDR2*
MC78LXXACP
MC78LXXACPRA / MC78LXXACPRE
MC78LXXACPRM / MC78LXXACPRP
MC78LXXABD*
MC78LXXABDR2*
MC78LXXABP*
MC78LXXABPRA / MC78LXXABPRE
MC78LXXABPRM / MC78LXXABPRP
TJ = 0° to +125°C
TJ = –40° to +125°C
SOP–8
SOP–8 / Tape & Reel
TO–92
TO–92 / Tape & Reel
TO–92 / Ammo Pack
SOP–8
SOP–8 / Tape & Reel
TO–92
TO–92 / Tape & Reel
TO–92 / Ammo Pack
98 Units / Rail
2500 Units / Tape & Reel
2000 Units / Bag
2000 Units / Tape & Reel
2000 Units / Ammo Pack
98 Units / Rail
2500 Units / Tape & Reel
2000 Units / Bag
2000 Units / Tape & Reel
2000 Units / Ammo Pack
XX indicates nominal voltage
*Available in 5, 8, 9, 12 and 15 V devices.
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부품번호상세설명 및 기능제조사
MC78L08AB

Three-Terminal Low Current Positive Voltage Regulators

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MC78L08ABD

Three-Terminal Low Current Positive Voltage Regulators

Motorola Semiconductors
Motorola Semiconductors

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