LM337 [TI]
3-TERMINAL ADJUSTABLE REGULATORS; 三端可调稳压器
| 型号： | LM337 |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | 3-TERMINAL ADJUSTABLE REGULATORS |
| 文件： | 总10页 (文件大小：271K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LM237, LM337
3-TERMINAL ADJUSTABLE REGULATORS
SLVS047G – NOVEMBER 1981 – REVISED SEPTEMBER 2003
LM237, LM337 . . . KC (TO-220) PACKAGE
(TOP VIEW)
Output Voltage Range Adjustable From
–1.2 V to –37 V
OUTPUT
Output Current Capability of 1.5 A Max
INPUT
ADJUSTMENT
Input Regulation Typically 0.01% Per
Input-Voltage Change
LM337 . . . KTE OR KTP PACKAGE
(TOP VIEW)
Output Regulation Typically 0.3%
Peak Output Current Constant Over
Temperature Range of Regulator
OUTPUT
INPUT
Ripple Rejection Typically 77 dB
Direct Replacement for Industry-Standard
LM237 and LM337
ADJUSTMENT
description/ordering information
The LM237 and LM337 are adjustable 3-terminal negative-voltage regulators capable of supplying in excess
of –1.5 A over an output voltage range of –1.2 V to –37 V. They are exceptionally easy to use, requiring only
two external resistors to set the output voltage and one output capacitor for frequency compensation. The
current design has been optimized for excellent regulation and low thermal transients. In addition, the LM237
and LM337 feature internal current limiting, thermal shutdown, and safe-area compensation, making them
virtually immune to failure by overloads.
The LM237 and LM337 serve a wide variety of applications, including local on-card regulation, programmable
output-voltage regulation, and precision current regulation.
ORDERING INFORMATION
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
†
PACKAGE
T
J
–25°C to 150°C
0°C to 125°C
TO-220 (KC)
Tube of 50
LM237KC
LM237
PowerFLEX (KTE)
PowerFLEX (KTP)
TO-220 (KC)
Reel of 2000
Reel of 3000
Tube of 50
LM337KTER
LM337KTPR
LM337KC
LM337
L337
LM337
†
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available
at www.ti.com/sc/package.
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.
PowerFLEX is a trademark of Texas Instruments.
Copyright 2003, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
LM237, LM337
3-TERMINAL ADJUSTABLE REGULATORS
SLVS047G – NOVEMBER 1981 – REVISED SEPTEMBER 2003
schematic diagram
ADJUSTMENT
OUTPUT
INPUT
†
absolute maximum ratings over operating temperature ranges (unless otherwise noted)
Input-to-output differential voltage, V – V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40 V
I
O
Operating virtual junction temperature, T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150°C
J
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C
Storage temperature range, T
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°C
stg
†
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
package thermal data (see Note 1)
PACKAGE
BOARD
θ
JC
θ
JA
PowerFLEX (KTE)
High K, JESD 51-5
High K, JESD 51-5
High K, JESD 51-5
3°C/W
19°C/W
3°C/W
23°C/W
28°C/W
19°C/W
PowerFLEX (KTP)
TO-220 (KC)
NOTE 1: Maximum power dissipation is a function of T (max), θ , and T . The maximum allowable power dissipation at any allowable ambient
J
JA
A
temperature is P = (T (max) – T )/θ . Operating at the absolute maximum T of 150°C can affect reliability.
D
J
A
JA
J
recommended operating conditions
MIN
10
6
MAX
1500
1500
150
UNIT
|V – V | ≤ 40 V,
P ≤ 15 W
P ≤ 15 W
I
O
I
Output current
mA
O
|V – V | ≤ 10 V,
I
O
LM237
LM337
–25
0
T
Operating virtual junction temperature
°C
J
125
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
LM237, LM337
3-TERMINAL ADJUSTABLE REGULATORS
SLVS047G – NOVEMBER 1981 – REVISED SEPTEMBER 2003
electrical characteristics over recommended ranges of operating virtual junction temperature
(unless otherwise noted)
LM237
TYP
0.01
0.02
60
LM337
TYP
0.01
0.02
60
†
PARAMETER
UNIT
TEST CONDITIONS
MIN
MAX
0.02
0.05
MIN
MAX
0.04
0.07
T = 25°C
J
‡
V – V = –3 V to –40 V
%/V
Input regulation
I
O
T = MIN to MAX
J
V
V
= –10 V,
= –10 V,
f = 120 HZ
O
Ripple rejection
dB
f = 120 HZ,
C
= 10 µF
66
77
66
77
O
ADJ
|V | ≤ 5 V
25
0.5%
50
50
1%
mV
I
= 10 mA to 1.5 A,
O
O
J
T = 25°C
|V | ≥ 5 V
O
0.3%
0.3%
Output regulation
|V | ≤ 5 V
O
70
mV
I
O
= 10 mA to 1.5 A
|V | ≥ 5 V
O
1%
1.5%
Output-voltage
change with
temperature
T = MIN to MAX
J
0.6%
0.6%
Output-voltage
long-term drift
After 1000 h at T = MAX and V – V = –40 V
0.3%
1%
0.3%
1%
J
I
O
Output noise
voltage
f = 10 HZ to 10 kHZ,
T = 25°C
J
0.003%
0.003%
Minimum output
current to maintain
regulation
|V – V | ≤ 40 V
2.5
1.2
5
3
2.5
1.5
10
6
I
O
mA
|V – V | ≤ 10 V
I
O
|V – V | ≤ 15 V
1.5
2.2
0.4
1.5
2.2
0.4
I
O
Peak output current
A
|V – V | ≤ 40 V,
T = 25°C
J
0.24
0.15
I
O
Adjustment-terminal
current
65
100
5
65
100
5
µA
Change in
adjustment-terminal
current
V – V = – 2.5 V to –40 V, T = 25°C,
I
O
J
2
2
µA
I
O
= 10 mA to MAX
V – V = – 3 V to –40 V,
T = 25°C
–1.225
–1.2
–1.25 –1.275 –1.213
–1.25 –1.287
I
O
J
Reference voltage
(output to ADJ)
V
I
= 10 mA to 1.5 A,
O
T = MIN to MAX
J
–1.25
0.002
–1.3
0.02
–1.2
–1.25
0.003
–1.3
0.04
P ≤ rated dissipation
Thermal regulation
Initial T = 25°C,
10-ms pulse
%/W
J
†
Unless otherwise noted, these specifications apply for the following test conditions |V – V | = 5 V and I = 0.5 A. For conditions shown as MIN
I
O
O
or MAX, use the appropriate value specified under recommended operating conditions. All characteristics are measured with a 0.1-µF capacitor
across the input and a 1-µF capacitor across the output. Pulse-testing techniques are used to maintain the junction temperature as close to the
ambient temperature as possible. Thermal effects must be taken into account separately.
‡
Input regulation is expressed here as the percentage change in output voltage per 1-V change at the input.
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
LM237, LM337
3-TERMINAL ADJUSTABLE REGULATORS
SLVS047G – NOVEMBER 1981 – REVISED SEPTEMBER 2003
electrical characteristics, T = 25°C
J
LM237, LM337
†
PARAMETER
UNIT
%/V
dB
TEST CONDITIONS
MIN
TYP
0.01
60
MAX
‡
V – V = –3 V to –40 V
0.04
Input regulation
I
O
V
= –10 V,
f = 120 HZ
f = 120 HZ
O
O
Ripple rejection
V
= –10 V,
C
= 10 µF,
66
77
ADJ
|V | ≤ 5 V
50
mV
O
Output regulation
I
= 10 mA to 1.5 A
O
|V | ≥ 5 V
O
0.3%
0.003%
2.5
1%
Output noise voltage
f = 10 HZ to 10 kHZ
|V – V | ≤ 40 V
10
6
I
O
Minimum output current to maintain regulation
mA
A
|V – V | ≤ 10 V
1.5
I
O
|V – V | ≤ 15 V
1.5
2.2
I
O
Peak output current
|V – V | ≤ 40 V
0.15
0.4
I
O
Adjustment-terminal current
65
100
5
µA
µA
Change in adjustment-terminal current
V – V = – 2.5 V to –40 V,
I
I
= 10 mA to MAX
= 10 mA to 1.5 A,
2
I
O
O
O
V – V = – 3 V to –40 V,
I
O
Reference voltage (output to ADJ)
–1.213
–1.25 –1.287
V
P ≤ rated dissipation
†
Unlessotherwisenoted, thesespecificationsapplyforthefollowingtestconditions|V – V | = 5 V and I =0.5A. Allcharacteristicsaremeasured
I
O
O
with a 0.1-µF capacitor across the input and a 1-µF capacitor across the output. Pulse-testing techniques are used to maintain the junction
temperature as close to the ambient temperature as possible. Thermal effects must be taken into account separately.
Input regulation is expressed here as the percentage change in output voltage per 1-V change at the input.
‡
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
LM237, LM337
3-TERMINAL ADJUSTABLE REGULATORS
SLVS047G – NOVEMBER 1981 – REVISED SEPTEMBER 2003
APPLICATION INFORMATION
LM237
or
LM337
INPUT
OUTPUT
V
O
V
I
ADJUSTMENT
R1
R2
C1
C2
+
+
R1 typically is 120 Ω.
–V
O
–1..25
R2
R1
1
, where V is the output in volts.
O
C1 is a 1-µF solid tantalum capacitor required only if the regulator is more than 10 cm (4 in) from the power-supply filter capacitor.
C2 is a 1-µF solid tantalum or 10-µF aluminum electrolytic capacitor required for stability.
Figure 1. Adjustable Negative-Voltage Regulator
LM237
or
LM337
R
S
V
I
INPUT
OUTPUT
V
O
ADJUSTMENT
1.25 V
R
=
S
I
LIMIT
Figure 2. Current-Limiting Circuit
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
PACKAGE OPTION ADDENDUM
www.ti.com
19-May-2005
PACKAGING INFORMATION
Orderable Device
Status (1)
Package Package
Pins Package Eco Plan (2) Lead/Ball Finish MSL Peak Temp (3)
Qty
Type
TO-220
PFM
Drawing
LM237KC
LM237KTER
LM337KC
ACTIVE
OBSOLETE
ACTIVE
KC
3
3
3
3
2
2
50
TBD
TBD
TBD
TBD
TBD
CU SNPB
Call TI
Level-NC-NC-NC
Call TI
KTE
KC
TO-220
PFM
50
CU SNPB
CU SNPB
CU SNPB
CU SN
Level-NC-NC-NC
Level-1-220C-UNLIM
Level-1-220C-UNLIM
Level-1-260C-UNLIM
LM337KTER
LM337KTPR
LM337KTPRG3
ACTIVE
KTE
KTP
KTP
2000
3000
ACTIVE
PFM
ACTIVE
PFM
3000 Green (RoHS &
no Sb/Br)
LM337Y
OBSOLETE XCEPT
Y
0
TBD
Call TI
Call TI
(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) 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.
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.
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 1
MECHANICAL DATA
MPFM001E – OCTOBER 1994 – REVISED JANUARY 2001
KTE (R-PSFM-G3)
PowerFLEX PLASTIC FLANGE-MOUNT
0.375 (9,52)
0.365 (9,27)
0.080 (2,03)
0.070 (1,78)
0.360 (9,14)
0.350 (8,89)
0.050 (1,27)
0.040 (1,02)
0.220 (5,59)
NOM
0.010 (0,25) NOM
Thermal Tab
(See Note C)
0.360 (9,14)
0.350 (8,89)
0.295 (7,49)
NOM
0.320 (8,13)
0.310 (7,87)
0.420 (10,67)
0.410 (10,41)
1
3
0.025 (0,63)
0.031 (0,79)
Seating Plane
0.004 (0,10)
0.010 (0,25)
M
0.100 (2,54)
0.200 (5,08)
0.005 (0,13)
0.001 (0,03)
0.041 (1,04)
0.031 (0,79)
0.010 (0,25)
NOM
Gage Plane
3°–6°
0.010 (0,25)
4073375/F 12/00
NOTES: A. All linear dimensions are in inches (millimeters).
B. This drawing is subject to change without notice.
C. The center lead is in electrical contact with the thermal tab.
D. Dimensions do not include mold protrusions, not to exceed 0.006 (0,15).
E. Falls within JEDEC MO-169
PowerFLEX is a trademark of Texas Instruments.
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
MECHANICAL DATA
MPSF001F – JANUARY 1996 – REVISED JANUARY 2002
KTP (R-PSFM-G2)
PowerFLEX PLASTIC FLANGE-MOUNT PACKAGE
0.080 (2,03)
0.070 (1,78)
0.243 (6,17)
0.233 (5,91)
0.228 (5,79)
0.218 (5,54)
0.050 (1,27)
0.040 (1,02)
0.130 (3,30) NOM
0.010 (0,25) NOM
Thermal Tab
(See Note C)
0.215 (5,46)
0.287 (7,29)
0.277 (7,03)
NOM
0.247 (6,27)
0.237 (6,02)
0.381 (9,68)
0.371 (9,42)
0.100 (2,54)
0.090 (2,29)
0.032 (0,81) MAX
Seating Plane
0.004 (0,10)
0.090 (2,29)
0.180 (4,57)
0.005 (0,13)
0.001 (0,02)
0.031 (0,79)
0.025 (0,63)
0.010 (0,25)
M
0.047 (1,19)
0.037 (0,94)
0.010 (0,25) NOM
Gage Plane
0.010 (0,25)
2°–ā6°
4073388/M 01/02
NOTES: A. All linear dimensions are in inches (millimeters).
B. This drawing is subject to change without notice.
C. The center lead is in electrical contact with the thermal tab.
D. Dimensions do not include mold protrusions, not to exceed 0.006 (0,15).
E. Falls within JEDEC TO-252 variation AC.
PowerFLEX is a trademark of Texas Instruments.
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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