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LM340 数据手册 - Freescale（飞思卡尔）
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LM340数据手册
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SEMICONDUCTOR
TECHNICAL DATA
Order this document by MC7800/D
D2T SUFFIX
PLASTIC PACKAGE
CASE 936
(D
2
PAK)
THREE–TERMINAL
POSITIVE FIXED
VOLTAGE REGULATORS
STANDARD APPLICATION
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.
XX,
MC78XX
Input
C
in
*
0.33
µ
F
C
O
**
Output
Pin 1. Input
2. Ground
3. Output
T SUFFIX
PLASTIC PACKAGE
CASE 221A
Heatsink surface
connected to Pin 2.
Heatsink surface (shown as terminal 4 in
case outline drawing) is connected to Pin 2.
3
1
2
3
1
2
These two digits of the type number
indicate nominal voltage.
C
in
is required if regulator is located an
appreciable distance from power supply
filter.
C
O
is not needed for stability; however,
it does improve transient response. Values
of less than 0.1 µF could cause instability.
*
**
1
MOTOROLA ANALOG IC DEVICE DATA
These voltage regulators are monolithic integrated circuits designed as
fixed–voltage regulators for a wide variety of applications including local,
on–card regulation. These regulators employ internal current limiting,
thermal shutdown, and safe–area compensation. With adequate heatsinking
they can deliver output currents in excess of 1.0 A. Although designed
primarily as a fixed voltage regulator, these devices can be used with
external components to obtain adjustable voltages and currents.
• Output Current in Excess of 1.0 A
• No External Components Required
• Internal Thermal Overload Protection
• Internal Short Circuit Current Limiting
• Output Transistor Safe–Area Compensation
• Output Voltage Offered in 2% and 4% Tolerance
• Available in Surface Mount D
2
PAK and Standard 3–Lead Transistor
Packages
• Previous Commercial Temperature Range has been Extended to a
Junction Temperature Range of –40°C to +125°C
DEVICE TYPE/NOMINAL OUTPUT VOLTAGE
MC7805AC
50V
MC7812C
12 V
LM340AT–5
50V
LM340T–12
12
V
MC7805C
5
.
0
V
MC7815AC
15 V
LM340T–5
LM340AT–15
15 V
MC7806AC
60V
MC7815C
15
V
MC7806C
6
.
0
V
LM340T–15
MC7808AC
80V
MC7818AC
18 V
MC7808C
8
.
0
V
MC7818C
18
V
MC7809C
9.0 V MC7824AC
24 V
MC7812AC
12 V
MC7824C
24
V
LM340AT–12
12
V
ORDERING INFORMATION
Device
Output Voltage
Tolerance
Operating
Temperature Range
Package
MC78XXACT
2%
T40°125°C
Insertion Mount
LM340AT–XX
2%
T40°125°C
Insertion
Mount
MC78XXACD2T
T
J
=
–
40
°
to +125
°
C
Surface Mount
MC78XXCT
4%
T
J
= –
40°
to
+
125°C
Insertion Mount
LM340T–XX
4%
Insertion
Mount
MC78XXCD2T Surface Mount
XX indicates nominal voltage.
Motorola, Inc. 1997 Rev 5
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