LM337LZ/LFT4 [TI]
LM337L 3-Terminal Adjustable Regulator; LM337L三端可调稳压器
| 型号： | LM337LZ/LFT4 |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | LM337L 3-Terminal Adjustable Regulator |
| 文件： | 总13页 (文件大小：779K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LM337L
www.ti.com
SNVS780D –MAY 1998–REVISED MAY 2013
LM337L 3-Terminal Adjustable Regulator
Check for Samples: LM337L
Normally, only a single 1μF solid tantalum output
1
FEATURES
capacitor is needed unless the device is situated
more than 6 inches from the input filter capacitors, in
which case an input bypass is needed. A larger
output capacitor can be added to improve transient
response. The adjustment terminal can be bypassed
to achieve very high ripple rejection ratios which are
difficult to achieve with standard 3-terminal
regulators.
2
•
•
•
•
•
•
•
•
•
•
•
Adjustable Output Down to 1.2V
Ensured 100mA Output Current
Line Regulation Typically 0.01%/V
Load Regulation Typically 0.1%
Current Limit Constant With Temperature
Eliminates the Need to Stock Many Voltages
Standard 3-Lead Transistor Package
80 dB Ripple Rejection
Besides replacing fixed regulators, the LM337L is
useful in a wide variety of other applications. Since
the regulator is “floating” and sees only the input-to-
output differential voltage, supplies of several
hundred volts can be regulated as long as the
maximum input-to-output differential is not exceeded.
Output is Short Circuit Protected
Available in the 6-Bump DSBGA Package
See AN-1112 (Literature Number SNVA009) for
DSBGA Considerations
Also, it makes an especially simple adjustable
switching regulator, a programmable output regulator,
or by connecting a fixed resistor between the
adjustment and output, the LM337L can be used as a
precision current regulator. Supplies with electronic
shutdown can be achieved by clamping the
adjustment terminal to ground which programs the
output to 1.2V where most loads draw little current.
DESCRIPTION
The LM337L is an adjustable 3-terminal negative
voltage regulator capable of supplying 100mA over a
1.2V to 37V output range. It is exceptionally easy to
use and requires only two external resistors to set the
output voltage. Furthermore, both line and load
regulation are better than standard fixed regulators.
Also, the LM337L is packaged in a standard TO-92
transistor package which is easy to use.
The LM337L is available in a standard TO-92
transistor package, SO-8 surface mount package,
and in our new 12 mil diameter bump DSBGA
package. The LM337L is rated for operation over a
−25°C to +125°C range.
In addition to higher performance than fixed
regulators, the LM337L offers full overload protection.
Included on the chip are current limit, thermal
overload protection and safe area protection. All
overload protection circuitry remains fully functional
even if the adjustment terminal is disconnected.
For applications requiring greater output current in
excess of 0.5A and 1.5A, see LM137 series data
sheets. For the positive complement, see series
LM117 and LM317L data sheets.
Typical Application
1.2V-25V Adjustable Regulator
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 1998–2013, Texas Instruments Incorporated
LM337L
SNVS780D –MAY 1998–REVISED MAY 2013
www.ti.com
Connection Diagrams
3-Pin TO92
8-Pin SOIC
Figure 1. Bottom View
Figure 2. Top View
6-Bump DSBGA
ADJ
NC
A2
NC
C2
B2
A1
B1
C1
IN
OUT
NC
2
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Copyright © 1998–2013, Texas Instruments Incorporated
Product Folder Links: LM337L
LM337L
www.ti.com
SNVS780D –MAY 1998–REVISED MAY 2013
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
Absolute Maximum Ratings(1)(2)
Power Dissipation
Internally Limited
40V
Input–Output Voltage Differential
Operating Junction Temperature Range
Storage Temperature
−25°C to +125°C
−55°C to +150°C
300°C
Lead Temperature (Soldering, 10 sec.)
Plastic Package (Soldering 4 sec.)
ESD Rating
260°C
1.5kV(3)
(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 ensure specific performance limits.
(2) If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/Distributors for availability and
specifications.
(3) Human body model, 1.5kΩ in series with 100pF.
Electrical Characteristics(1)
Parameter
Conditions
TA = 25°C, 3V ≤ |VIN − VOUT| ≤ 40V(2)
Min
Typ
0.01
0.1
Max
0.04
0.5
Units
%/V
%
Line Regulation
(2)
Load Regulation
TA = 25°C, 5mA ≤ IOUT ≤ IMAX
Thermal Regulation
TA = 25°C, 10ms Pulse
0.04
50
0.2
%/W
μA
Adjustment Pin Current
Adjustment Pin Current Change
100
5mA ≤ IL ≤ 100mA
3V ≤ |VIN − VOUT| ≤ 40V
0.2
5
μA
Reference Voltage
3V ≤ |VIN − VOUT| ≤ 40V(3)
10mA ≤ IOUT ≤ 100mA, P ≤ 625mW
1.20
1.25
1.30
V
Line Regulation
3V ≤ |VIN − VOUT| ≤ 40V(2)
5mA ≤ IOUT ≤ 100mA(2)
0.02
0.3
0.07
1.5
%/V
%
Load Regulation
Temperature Stability
Minimum Load Current
T
MIN ≤ Tj ≤ TMAX
0.65
3.5
%
|VIN − VOUT| ≤ 40V
5
mA
mA
mA
mA
%
3V ≤ |VIN − VOUT| ≤ 15V
3V ≤ |VIN − VOUT| ≤ 13V
|VIN − VOUT| = 40V
2.2
3.5
320
120
Current Limit
100
25
200
50
Rms Output Noise, % of VOUT
Ripple Rejection Ratio
TA = 25°C, 10Hz ≤ f ≤ 10kHz
VOUT = −10V, F = 120 Hz, CADJ = 0
CADJ = 10μF
0.003
65
dB
dB
%
66
80
Long-Term Stability
TA = 125°C
0.3
1
(1) Unless otherwise specified, these specifications apply −25°C ≤ TJ ≤ + 125°C for the LM337L; |VIN − VOUT| = 5V and IOUT = 40mA.
Although power dissipation is internally limited, these specifications are applicable for power dissipations up to 625 mW. IMAX is 100mA.
(2) Regulation is measured at constant junction temperature, using pulse testing with a low duty cycle. Changes in output voltage due to
heating effects are covered under the specification for thermal regulation.
(3) Thermal resistance of the TO-92 package is 180°C/W junction to ambient with 0.4″ leads from a PC board and 160°C/W junction to
ambient with 0.125″ lead length to PC board. The SOIC package θJA is 180°C/W in still air. The 6-Bump DSBGA package θJA is
290°C/W in still air.
Copyright © 1998–2013, Texas Instruments Incorporated
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3
Product Folder Links: LM337L
LM337L
SNVS780D –MAY 1998–REVISED MAY 2013
www.ti.com
Typical Applications
1.2V-25V Adjustable Regulator
Full output current not available at high input-output voltages
†C1 = 1μF solid tantalum or 10μF aluminum electrolytic required for stability
*C2 = 1μF solid tantalum is required only if regulator is more than 4″ from power supply filter capacitor
Regulator with Trimmable Output Voltage
Trim Procedure:
—If VOUT is −23.08V or bigger, cut out R3 (if smaller, don't cut it out).
—Then if VOUT is −22.47V or bigger, cut out R4 (if smaller, don't).
—Then if VOUT is −22.16V or bigger, cut out R5 (if smaller, don't).
This will trim the output to well within 1% of −22.00 VDC, without any of the expense or trouble of a trim pot (see LB-
46). Of course, this technique can be used at any output voltage level.
4
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Copyright © 1998–2013, Texas Instruments Incorporated
Product Folder Links: LM337L
LM337L
www.ti.com
SNVS780D –MAY 1998–REVISED MAY 2013
REVISION HISTORY
Changes from Revision C (May 2013) to Revision D
Page
•
Changed layout of National Data Sheet to TI format ............................................................................................................ 4
Copyright © 1998–2013, Texas Instruments Incorporated
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5
Product Folder Links: LM337L
PACKAGE OPTION ADDENDUM
www.ti.com
21-May-2013
PACKAGING INFORMATION
Orderable Device
LM337LM
Status Package Type Package Pins Package
Eco Plan Lead/Ball Finish
MSL Peak Temp
Op Temp (°C)
-25 to 100
-25 to 100
-25 to 100
-25 to 100
Device Marking
Samples
Drawing
Qty
(1)
(2)
(3)
(4/5)
ACTIVE
SOIC
SOIC
SOIC
SOIC
TO-92
TO-92
TO-92
TO-92
D
8
8
8
8
3
3
3
3
95
TBD
Call TI
CU SN
Call TI
CU SN
SN
Call TI
LM337
LM
LM337LM/NOPB
LM337LMX
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
D
D
95
Green (RoHS
& no Sb/Br)
Level-1-260C-UNLIM
Call TI
LM337
LM
2500
2500
2000
2000
2000
1800
TBD
LM337
LM
LM337LMX/NOPB
LM337LZ/LFT1
LM337LZ/LFT3
LM337LZ/LFT4
LM337LZ/NOPB
D
Green (RoHS
& no Sb/Br)
Level-1-260C-UNLIM
Level-1-NA-UNLIM
Level-1-NA-UNLIM
Level-1-NA-UNLIM
Level-1-NA-UNLIM
LM337
LM
LP
LP
LP
LP
Green (RoHS
& no Sb/Br)
LM337
LZ
Green (RoHS
& no Sb/Br)
SNCU
SNCU
SNCU
LM337
LZ
Green (RoHS
& no Sb/Br)
LM337
LZ
Green (RoHS
& no Sb/Br)
-25 to 100
LM337
LZ
(1) The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability
information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that
lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between
the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight
in homogeneous material)
(3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
Addendum-Page 1
PACKAGE OPTION ADDENDUM
www.ti.com
21-May-2013
(4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device.
(5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation
of the previous line and the two combined represent the entire Device Marking for that device.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information
provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and
continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.
TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
Addendum-Page 2
PACKAGE MATERIALS INFORMATION
www.ti.com
8-May-2013
TAPE AND REEL INFORMATION
*All dimensions are nominal
Device
Package Package Pins
Type Drawing
SPQ
Reel
Reel
A0
B0
K0
P1
W
Pin1
Diameter Width (mm) (mm) (mm) (mm) (mm) Quadrant
(mm) W1 (mm)
LM337LMX
SOIC
SOIC
D
D
8
8
2500
2500
330.0
330.0
12.4
12.4
6.5
6.5
5.4
5.4
2.0
2.0
8.0
8.0
12.0
12.0
Q1
Q1
LM337LMX/NOPB
Pack Materials-Page 1
PACKAGE MATERIALS INFORMATION
www.ti.com
8-May-2013
*All dimensions are nominal
Device
Package Type Package Drawing Pins
SPQ
Length (mm) Width (mm) Height (mm)
LM337LMX
SOIC
SOIC
D
D
8
8
2500
2500
367.0
367.0
367.0
367.0
35.0
35.0
LM337LMX/NOPB
Pack Materials-Page 2
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