LM109H/883/NOPB [TI]
IC,VOLT REGULATOR,FIXED,+5V,BIPOLAR,CAN,3PIN,METAL;
| 型号： | LM109H/883/NOPB |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | IC,VOLT REGULATOR,FIXED,+5V,BIPOLAR,CAN,3PIN,METAL |
| 文件： | 总9页 (文件大小：280K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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April 1998
LM109/LM309
5-Volt Regulator
does improve transient response somewhat. Input bypass-
ing is needed, however, if the regulator is located very far
from the filter capacitor of the power supply. Stability is also
achieved by methods that provide very good rejection of load
or line transients as are usually seen with TTL logic.
General Description
The LM109 series are complete 5V regulators fabricated on
a single silicon chip. They are designed for local regulation
on digital logic cards, eliminating the distribution problems
association with single-point regulation. The devices are
available in two standard transistor packages. In the
solid-kovar TO-5 header, it can deliver output currents in ex-
cess of 200 mA, if adequate heat sinking is provided. With
the TO-3 power package, the available output current is
greater than 1A.
Although designed primarily as a fixed-voltage regulator, the
output of the LM109 series can be set to voltages above 5V,
as shown. It is also possible to use the circuits as the control
element in precision regulators, taking advantage of the
good current-handling capability and the thermal overload
protection.
The regulators are essentially blowout proof. Current limiting
is included to limit the peak output current to a safe value. In
addition, thermal shutdown is provided to keep the IC from
overheating. If internal dissipation becomes too great, the
regulator will shut down to prevent excessive heating.
Features
n Specified to be compatible, worst case, with TTL and
DTL
n Output current in excess of 1A
n Internal thermal overload protection
n No external components required
Considerable effort was expended to make these devices
easy to use and to minimize the number of external compo-
nents. It is not necessary to bypass the output, although this
Schematic Diagram
DS007138-1
© 1999 National Semiconductor Corporation
DS007138
www.national.com
Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Operating Junction Temperature Range
LM109
−55˚C to +150˚C
0˚C to +125˚C
LM309
Storage Temperature Range
Lead Temperature
(Soldering, 10 sec.)
−65˚C to +150˚C
Input Voltage
35V
300˚C
Power Dissipation
Internally Limited
Electrical Characteristics (Note 2)
Parameter
Conditions
LM109
Typ
LM309
Typ
Units
Max
Min
Max
5.3
50
Min
=
Output Voltage
Tj 25˚C
4.7
5.05
4.0
4.8
5.05
4.0
5.2
50
V
=
Line Regulation
Tj 25˚C
mV
7.10V ≤ VIN ≤ 25V
=
Load Regulation
Tj 25˚C
TO-39 Package
TO-3 Package
Output Voltage
5 mA ≤ IOUT ≤ 0.5A
5 mA ≤ IOUT ≤ 1.5A
7.40V ≤ VIN ≤ 25V,
15
15
50
100
5.4
15
15
50
mV
mV
V
100
5.25
4.6
4.75
5 mA ≤ IOUT ≤ IMAX
,
<
P
PMAX
Quiescent Current
7.40V ≤ VIN ≤ 25V
7.40V ≤ VIN ≤ 25V
5 mA ≤ IOUT ≤ IMAX
5.2
10
0.5
0.8
5.2
10
0.5
0.8
mA
mA
mA
µV
Quiescent Current Change
=
Output Noise Voltage
TA 25˚C
40
10
40
20
10 Hz ≤ f ≤ 100 kHz
Long Term Stability
Ripple Rejection
Thermal Resistance,
Junction to Case
TO-39 Package
TO-3 Package
mV
dB
=
Tj 25˚C
50
50
(Note 3)
15
15
˚C/W
˚C/W
2.5
2.5
Note 1: “Absolute Maximum Ratings” indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
functional, but do not guarantee specific performance limits.
=
=
10V; and I
OUT
Note 2: Unless otherwise specified, these specifications apply −55˚C ≤ T ≤ +150˚C for the LM109 and 0˚C ≤ T ≤ +125˚C for the LM309; V
0.1A
=
1.0A and P
MAX
j
j
IN
2.0W. For the TO-3 package, I
=
=
0.2A and P
MAX
=
for the TO-39 package or I
0.5A for the TO-3 package. For the TO-39 package, I
OUT
MAX
MAX
=
20W.
Note 3: Without a heat sink, the thermal resistance of the TO-39 package is about 150˚C/W, while that of the TO-3 package is approximately 35˚C/W. With a heat
sink, the effective thermal resistance can only approach the values specified, depending on the efficiency of the sink.
Note 4: Refer to RETS109H drawing for LM109H or RETS109K drawing for LM109K military specifications.
Connection Diagrams
Metal Can Packages
DS007138-33
Order Number LM109H, LM109H/883 or LM309H
DS007138-34
See NS Package Number H03A
Order Number LM109K STEEL or
LM309K STEEL
See NS Package Number K02A
Order Number LM109K/883
See NS Package Number K02C
www.national.com
2
5. Preventing latchoff for loads connected to negative
Application Hints
1. Bypass the input of the LM109 to ground with ≥ 0.2 µF
ceramic or solid tantalum capacitor if main filter capaci-
tor is more than 4 inches away.
voltage:
If the output of the LM109 is pulled negative by a high cur-
rent supply so that the output pin is more than 0.5V negative
with respect to the ground pin, the LM109 can latch off. This
can be prevented by clamping the ground pin to the output
pin with a germanium or Schottky diode as shown. A silicon
diode (1N4001) at the output is also needed to keep the
positive output from being pulled too far negative. The 10Ω
resistor will raise +VOUT by ≈ 0.05V.
2. Avoid insertion of regulator into “live” socket if input
voltage is greater than 10V. The output will rise to within
2V of the unregulated input if the ground pin does not
make contact, possibly damaging the load. The LM109
may also be damaged if a large output capacitor is
charged up, then discharged through the internal clamp
zener when the ground pin makes contact.
3. The output clamp zener is designed to absorb tran-
sients only. It will not clamp the output effectively if a fail-
ure occurs in the internal power transistor structure. Ze-
ner dynamic impedance is
≈ 4Ω. Continuous RMS
current into the zener should not exceed 0.5A.
4. Paralleling of LM109s for higher output current is not
recommended. Current sharing will be almost nonexist-
ent, leading to a current limit mode operation for devices
with the highest initial output voltage. The current limit
devices may also heat up to the thermal shutdown point
(≈ 175˚C). Long term reliability cannot be guaranteed
under these conditions.
DS007138-7
Crowbar Overvoltage Protection
Input Crowbar
Output Crowbar
DS007138-8
DS007138-9
*Zener is internal to LM109.
*
*
Q1 must be able to withstand 7A continuous current if fusing is not used
at regulator input. LM109 bond wires will fuse at currents above 7A.
†
Q2 is selected for surge capability. Consideration must be given to filter
capacitor size, transformer impedance, and fuse blowing time.
††
Trip point is ≈ 7.5V.
Typical Performance Characteristics
Maximum Average
Power Dissipation (LM109K)
Maximum Average
Power Dissipation (LM309K)
Output Impedance
DS007138-18
DS007138-16
DS007138-17
3
www.national.com
Typical Performance Characteristics (Continued)
Maximum Average
Power Dissipation (LM109H)
Maximum Average
Power Dissipation (LM309H)
Ripple Rejection
DS007138-21
DS007138-19
DS007138-20
Current Limit
Characteristics (Note 5)
Thermally Induced Output
Voltage Variation
Ripple Rejection
DS007138-24
DS007138-22
DS007138-23
Note 5: Current limiting foldback characteristics are determined by input output differential, not by output voltage.
Input-Output Differential (V)
Output Voltage (V)
Output Voltage (V)
DS007138-26
DS007138-25
DS007138-27
www.national.com
4
Typical Performance Characteristics (Continued)
Quiescent Current
Quiescent Current
Output Voltage Noise
DS007138-30
DS007138-28
DS007138-29
Line Transient Response
Load Transient Response
DS007138-31
DS007138-32
Typical Applications
Fixed 5V Regulator
Adjustable Output Regulator
DS007138-4
DS007138-2
*Required if regulator is located more than 4" from power supply filter
capacitor.
†
Although no output capacitor is needed for stability, it does improve
transient response.
C2 should be used whenever long wires are used to connect to the load,
or when transient response is critical.
Note: Pin 3 electrically connected to case.
5
www.national.com
Typical Applications (Continued)
*
High Stability Regulator
DS007138-5
*Regulation better than 0.01%, load, line and temperature, can be obtained.
†
‡
Determines zener current. May be adjusted to minimize thermal drift.
Solid tantalum.
Current Regulator
DS007138-6
*Determines output current. If wirewound resistor is used, bypass with 0.1 µF.
www.national.com
6
Physical Dimensions inches (millimeters) unless otherwise noted
Metal Can Package (H)
Order Number LM109H, LM109H/883 or LM309H
NS Package Number H03A
Metal Can Package (K)
Order Number LM109K STEEL, LM309K STEEL
NS Package Number K02A
7
www.national.com
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
Metal Can Package (K)
Mil-Aero Product
Order Number LM109K/883
NS Package Number K02C
LIFE SUPPORT POLICY
NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DE-
VICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMI-
CONDUCTOR CORPORATION. As used herein:
1. Life support devices or systems are devices or sys-
tems which, (a) are intended for surgical implant into
the body, or (b) support or sustain life, and whose fail-
ure to perform when properly used in accordance
with instructions for use provided in the labeling, can
be reasonably expected to result in a significant injury
to the user.
2. A critical component is any component of a life support
device or system whose failure to perform can be rea-
sonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
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Corporation
Americas
Tel: 1-800-272-9959
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www.national.com
National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.
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