VOLTAGE REGULATORS. LM340A Datasheet

LM340A Datasheet PDF, Equivalent


Part Number

LM340A

Description

THREE TERMINAL POSITIVE FIXED VOLTAGE REGULATORS

Manufacture

Motorola Inc

Total Page 16 Pages
PDF Download
Download LM340A Datasheet


LM340A Datasheet
Order this document by MC7800/D
Three-Terminal Positive
Voltage Regulators
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 D2PAK 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
LM340AT–5
MC7805C
5.0 V
MC7812C
LM340T–12
MC7815AC
12 V
LM340T–5
MC7806AC
MC7806C
6.0 V
LM340AT–15
MC7815C
LM340T–15
15 V
MC7808AC
MC7808C
8.0 V
MC7818AC
MC7818C
18 V
MC7809C
MC7812AC
LM340AT–12
9.0 V
12 V
MC7824AC
MC7824C
24 V
MC7800,
MC7800A, LM340,
LM340A Series
THREE–TERMINAL
POSITIVE FIXED
VOLTAGE REGULATORS
SEMICONDUCTOR
TECHNICAL DATA
T SUFFIX
PLASTIC PACKAGE
CASE 221A
Heatsink surface
connected to Pin 2.
1
2
3
Pin 1. Input
2. Ground
3. Output
D2T SUFFIX
PLASTIC PACKAGE
CASE 936
(D2PAK)
12
3
Heatsink surface (shown as terminal 4 in
case outline drawing) is connected to Pin 2.
STANDARD APPLICATION
Input
Cin*
0.33 µF
MC78XX
Output
CO**
ORDERING INFORMATION
Device
Output Voltage
Operating
Tolerance
Temperature Range
Package
MC78XXACT
LM340AT–XX
2%
Insertion Mount
MC78XXACD2T
Surface Mount
MC78XXCT
TJ = –40° to +125°C
Insertion Mount
LM340T–XX
4%
MC78XXCD2T
Surface Mount
XX indicates nominal voltage.
MOTOROLA ANALOG IC DEVICE DATA
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, These two digits of the type number
indicate nominal 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. Values
of less than 0.1 µF could cause instability.
© Motorola, Inc. 1997
Rev 5
1

LM340A Datasheet
MC7800, MC7800A, LM340, LM340A Series
MAXIMUM RATINGS (TA = 25°C, unless otherwise noted.)
Rating
Symbol
Input Voltage (5.0 – 18 V)
Input Voltage (24 V)
Power Dissipation
Case 221A
TA = 25°C
Thermal Resistance, Junction–to–Ambient
Thermal Resistance, Junction–to–Case
Case 936 (D2PAK)
TA = 25°C
Thermal Resistance, Junction–to–Ambient
Thermal Resistance, Junction–to–Case
Storage Junction Temperature Range
Operating Junction Temperature
NOTE: ESD data available upon request.
VI
PD
RθJA
RθJC
PD
RθJA
RθJA
Tstg
TJ
Value
35
40
Internally Limited
65
5.0
Internally Limited
See Figure 13
5.0
–65 to +150
+150
Unit
Vdc
W
°C/W
°C/W
W
°C/W
°C/W
°C
°C
R18
100 k
D1
Zener
Representative Schematic Diagram
MC7800
LAT
Q17
R24
50
LAT 3 A
Q18
Q19
QNPN
D2
Zener
R19
27.5 k
C3 1.0 P
Q10
QNPN
R22
100
R14
1.0 k
R15
R21 680
600
Q7
QNPN
R17
9.0 k
R1
10.66 k
Q5
QNPN 2
Q9
QNPN 2
Q6
QNPN
R11
15 k
R2
1.56 k
Q8
QNPN
Q14
QNPN
R5
4.5 k
C2
3.0 P
Q1
QNPN 6
Q13
QNPN
R6
1.0 k
Q15
QNPN
R20
17500
Q12
QNPN
R16 R10
600 3340–(3316ACT)
R12
3.0 k
R25
6.0 k
R26
3.0 k
R9
3.0 k
C1
N+ 30 P
Q4
QNPN
Q2 Q16
QNPN 4
Diode
Q3
QNPN
SUB
Q11 2
R13
11660
R7 R3
14 k 1.8 k
R8
5.0 k
Q20
QNPN
R23
0.2
Vin
R30
18 k
R29
9.0 k
R28
9.0 k
R27
9.0 k
Vout
5.01
Sense
This device contains 22 active transistors.
2 MOTOROLA ANALOG IC DEVICE DATA


Features Datasheet pdf Order this document by MC7800/D MC7800, MC7800A, LM340, Three-Terminal Positiv e Voltage Regulators These voltage regu lators are monolithic integrated circui ts designed as fixed–voltage regulato rs for a wide variety of applications i ncluding local, on–card regulation. T hese regulators employ internal current limiting, thermal shutdown, and safe area compensation. With adequate heats inking 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 externa l components to obtain adjustable volta ges and currents. LM340A Series THREE –TERMINAL POSITIVE FIXED VOLTAGE REGU LATORS SEMICONDUCTOR TECHNICAL DATA • • • • • • • Output C urrent in Excess of 1.0 A No External C omponents Required Internal Thermal Ove rload Protection Internal Short Circuit Current Limiting Output Transistor Saf e–Area Compensation Output Voltage Of fered in 2% and 4% Tolerance Available in Surface Mount D2PAK and Standard 3–Lead Transis.
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