RM2941JXQMLV [TI]
5 V-20V ADJUSTABLE POSITIVE LDO REGULATOR, 1V DROPOUT, CDIP16, CERAMIC, DIP-16;
| 型号： | RM2941JXQMLV |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | 5 V-20V ADJUSTABLE POSITIVE LDO REGULATOR, 1V DROPOUT, CDIP16, CERAMIC, DIP-16 CD 输出元件 调节器 |
| 文件： | 总17页 (文件大小：444K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
National Semiconductor is now part of
Texas Instruments.
Search http://www.ti.com/ for the latest technical
information and details on our current products and services.
December 2001
LM2941/LM2941C
1A Low Dropout Adjustable Regulator
automatically shut down to protect both the internal circuits
and the load. Familiar regulator features such as short circuit
and thermal overload protection are also provided.
General Description
The LM2941 positive voltage regulator features the ability to
source 1A of output current with a typical dropout voltage of
0.5V and a maximum of 1V over the entire temperature
range. Furthermore, a quiescent current reduction circuit has
been included which reduces the ground pin current when
the differential between the input voltage and the output
voltage exceeds approximately 3V. The quiescent current
with 1A of output current and an input-output differential of
5V is therefore only 30 mA. Higher quiescent currents only
Features
n LLP space saving package
n Output voltage adjustable from 5V to 20V
@
n Dropout voltage typically 0.5V IO = 1A
n Output current in excess of 1A
n Trimmed reference voltage
n Reverse battery protection
n Internal short circuit current limit
n Mirror image insertion protection
n P+ Product Enhancement tested
n TTL, CMOS compatible ON/OFF switch
exist when the regulator is in the dropout mode (VIN
OUT ≤ 3V).
−
V
Designed also for vehicular applications, the LM2941 and all
regulated circuitry are protected from reverse battery instal-
lations or two-battery jumps. During line transients, such as
load dump when the input voltage can momentarily exceed
the specified maximum operating voltage, the regulator will
Connection Diagram and Ordering Information
TO-220 Plastic Package
TO-263 Surface-Mount Package
00882309
00882302
Tep View
Order Number LM2941T or
LM2941CT
See NS Package Number TO5A
00882308
Order Number LM2941S or
LM2941CS
See NS Package Number TS5B
16-Lead Ceramic Dual-in-Line
Package
16-Lead Ceramic Surface Mount
Package
8-Lead LLP Surface Mount
Package
00882331
Top View
00882332
Top View
00882333
Top View
Order Number LM2941J/883
5962-9166701QEA
Order Number LM2941WG/883
5962-9166701QYA
Ordering Number LM2941LD
See NS Package Number LDC08A
See NS Package Number J16A
See NS Package Number WG16A
© 2001 National Semiconductor Corporation
DS008823
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.
TO-263 (S) Package
260˚C
ESD susceptibility to be determined.
Operating Ratings
Input Voltage (Survival Voltage, ≤ 100ms)
Maximum Input Voltage
Temperature Range
LM2941T
26V
LM2941T, LM2941S
LM2941CT, LM2941CS
Internal Power Dissipation (Note
3)
60V
45V
−40˚C ≤ TJ ≤ 125˚C
0˚C ≤ TJ ≤ 125˚C
LM2941CT
Internally Limited
150˚C
LM2941S
−40˚C ≤ TJ ≤ 125˚C
0˚C ≤ TJ ≤ 125˚C
Maximum Junction Temperature
Storage Temperature Range
Lead Temperature
LM2941CS
−65˚C ≤ TJ ≤ +150˚C
LM2941J
−55˚C ≤ TJ ≤ 125˚C
−55˚C ≤ TJ ≤ 125˚C
−40˚C ≤ TJ ≤ 125˚C
LM2941WG
LM2941LD
(Soldering, 10 seconds)
TO-220 (T) Package
260˚C
Electrical Characteristics—LM2941T, LM2941S, LM2941J, LM2941WG,
LM2941LD
5V ≤ VO ≤ 20V, VIN = VO + 5V, CO = 22µF, unless otherwise specified. Specifications in standard typeface apply for TJ
25˚C, while those in boldface type apply over the full Operating Temperature Range.
=
LM2941T
LM2941J
LM2941S
LM2941WG
Limit
Units
Parameter
Conditions
Typ
LM2941LD
Limit
(Limits)
(Note 2) (Note 4)
(Note 5)
1.237/1.211
1.313/1.339
10/10
Reference Voltage
5mA ≤ IO ≤ 1A (Note 6)
1.275
1.237/1.211
1.313/1.339
10/10
V(min)
V(max)
Line Regulation
Load Regulation
Output Impedance
VO + 2V ≤ VIN ≤ 26V, IO = 5mA
50mA ≤ IO ≤ 1A
4
7
7
mV/V(max)
mV/V(max)
mΩ/V
10/10
10/10
100 mADC and 20 mArms
fO = 120Hz
<
Quiescent Current
VO + 2V ≤ VIN 26V, IO = 5mA
10
30
15/20
45/60
15/20
45/60
mA(max)
mA(max)
%
VIN = VO + 5V, IO = 1A
10Hz–100kHz
RMS Output Noise,
% of VOUT
0.003
IO = 5mA
Ripple Rejection
Long Term Stability
Dropout Voltage
fO = 120Hz, 1 Vrms, IL = 100mA
0.005
0.4
0.02/0.04
0.02/0.04
%/V(max)
%/1000 Hr
V(max)
IO = 1A
0.5
0.8/1.0
200/200
1.6/1.3
60/60
0.8/1.0
200/200
1.6
IO = 100mA
110
1.9
mV(max)
A(min)
Short Circuit Current
Maximum Line
VIN Max = 26V (Note 7)
VO Max 1V Above Nominal VO
RO = 100, T ≤ 100ms
75
60/60
V(min)
Transient
Maximum Operational
Input Voltage
31
26/26
26/26
VDC
Reverse Polarity DC
Input Voltage
RO = 100, VO ≥ −0.6V
T ≤ 100ms, RO = 100Ω
IO ≤ 1A
−30
−15/−15
−15/−15
V(min)
Reverse Polarity
Transient Input Voltage
ON/OFF Threshold
Voltage ON
−75
−50/−50
−50/−50
V(min)
V(max)
1.30
0.80/0.80
0.80/0.80
ON/OFF Threshold
Voltage OFF
IO ≤ 1A
1.30
50
2.00/2.00
100/300
2.00/2.00
100/300
V(min)
ON/OFF Threshold
Current
VON/OFF = 2.0V, IO ≤ 1A
µA(max)
www.national.com
2
Electrical Characteristics—LM2941CT, LM2941CS
5V ≤ VO ≤ 20V, VIN = VO + 5V, CO = 22µF, unless otherwise specified. Specifications in standard typeface apply for TJ
25˚C, while those in boldface type apply over the full Operating Temperature Range.
=
Parameter
Conditions
Typ
Limit
(Note 5)
1.237/1.211
1.313/1.339
10
Units
(Limits)
V(min)
Reference Voltage
5mA ≤ IO ≤ 1A (Note 6)
1.275
V(max)
Line Regulation
Load Regulation
Output Impedance
VO + 2V ≤ VIN ≤ 26V, IO = 5mA
50mA ≤ IO ≤ 1A
4
7
7
mV/V(max)
mV/V(max)
mΩ/V
10
100 mADC and 20 mArms
fO = 120Hz
<
Quiescent Current
VO + 2V ≤ VIN 26V, IO = 5mA
10
30
15
mA(max)
mA(max)
%
VIN = VO + 5V, IO = 1A
10Hz–100kHz
45/60
RMS Output Noise,
% of VOUT
0.003
IO = 5mA
Ripple Rejection
Long Term Stability
Dropout Voltage
fO = 120Hz, 1 Vrms, IL = 100mA
0.005
0.4
0.02
%/V(max)
%/1000 Hr
V(max)
IO = 1A
0.5
0.8/1.0
200/200
1.6
IO = 100mA
110
1.9
mV(max)
A(min)
Short Circuit Current
Maximum Line
VIN Max = 26V (Note 7)
VO Max 1V Above Nominal VO
RO = 100Ω, T ≤ 100ms
55
45
V(min)
Transient
Maximum Operational Input
Voltage
31
26
VDC
Reverse Polarity DC Input
Voltage
RO = 100Ω, VO ≥ −0.6V
T ≤ 100ms, RO = 100Ω
IO ≤ 1A
−30
−15
V(min)
Reverse Polarity Transient
Input Voltage
−55
−45
V(min)
V(max)
ON/OFF Threshold Voltage
ON
1.30
0.80
ON/OFF Threshold Voltage
OFF
IO ≤ 1A
1.30
50
2.00
100
V(min)
ON/OFF Threshold Current
VON/OFF = 2.0V, IO ≤ 1A
µA(max)
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating ratings indicate conditions for which the device is
intended to be functional, but device parameter specifications may not be guaranteed under these conditions. For guaranteed specifications and test conditions, see
the Electrical Characteristics.
Note 2: A military RETS specification available upon request. For more information about military-aerospace products, see the Mil-Aero web page at
http://www.national.com/appinfo/milaero/index.html.
Note 3: The maximum power dissipation is a function of T (max), θ , and T . The maximum allowable power dissipation at any ambient temperature is P =
D
J
JA
A
(T (max) − T )/θ . If this dissipation is exceeded, the die temperature will rise above 150˚C and the LM2941 will go into thermal shutdown. For the LM2941T and
J
A
JA
LM2941CT, the junction-to-ambient thermal resistance (θ ) is 53˚C/W, and the junction-to-case thermal resistance (θ ) is 3˚C/W. For the LM2941K, θ is 35˚C/W
JA
JC
JA
and θ is 4˚C/W. The junction-to-ambient thermal resistance of the TO-263 is 73˚C/W, and junction-to-case thermal resistance, θ is 3˚C. If the TO-263 package
JC
JC
is used, the thermal resistance can be reduced by increasing the P.C. board copper area thermally connected to the package: Using 0.5 square inches of copper
area, θ is 50˚C/W; with 1 square inch of copper area, θ is 37˚C/W; and with 1.6 or more square inches of copper area, θ is 32˚C/W. The value θ for the LLP
JA
JA
JA
JA
package is specifically dependent on PCB trace area, trace material, and the number of layers and thermal vias. For improved thermal resistance and power
dissipation for the LLP package, refer to Application Note AN-1187.
Note 4: All limits guaranteed at room temperature (standard typeface) and at temperature extremes (boldface type). All limits are used to calculate Outgoing Quality
Level, and are 100% production tested.
Note 5: All limits guaranteed at room temperature (standard typeface) and at temperature extremes (boldface type). All room temperature limits are 100%
production tested. All limits at temperature extremes are guaranteed via correlation using standard Statistical Quality Control (SQC) methods.
Note 6: The output voltage range is 5V to 20V and is determined by the two external resistors, R1 and R2. See Typical Application Circuit.
Note 7: Output current capability will decrease with increasing temperature, but will not go below 1A at the maximum specified temperatures.
3
www.national.com
Typical Performance Characteristics
Dropout Voltage
Dropout Voltage vs. Temperature
00882311
00882312
Output Voltage
Quiescent Current vs. Temperature
00882313
00882314
Quiescent Current
Quiescent Current
00882315
00882316
www.national.com
4
Typical Performance Characteristics (Continued)
Line Transient Response
Load Transient Response
00882318
00882317
Ripple Rejection
Output Impedance
00882319
00882320
Low Voltage Behavior
Low Voltage Behavior
00882321
00882322
5
www.national.com
Typical Performance Characteristics (Continued)
Output Capacitor ESR
Output at Voltage Extremes
00882324
00882323
Output at Voltage Extremes
Peak Output Current
00882325
00882326
Maximum Power Dissipation (TO-220)
Maximum Power Dissipation (TO-3)
00882328
00882327
www.national.com
6
Typical Performance
Characteristics (Continued)
Maximum Power Dissipation (TO-263) (Note 3)
00882329
Definition of Terms
Dropout Voltage: The input-voltage differential at which the
circuit ceases to regulate against further reduction in input
voltage. Measured when the output voltage has dropped
100 mV from the nominal value obtained at (VOUT + 5V)
input, dropout voltage is dependent upon load current and
junction temperature.
Long Term Stability: Output voltage stability under accel-
erated life-test conditions after 1000 hours with maximum
rated voltage and junction temperature.
Output Noise Voltage: The rms AC voltage at the output,
with constant load and no input ripple, measured over a
specified frequency range.
Input Voltage: The DC voltage applied to the input terminals
with respect to ground.
Quiescent Current: That part of the positive input current
that does not contribute to the positive load current. The
regulator ground lead current.
Input-Output Differential: The voltage difference between
the unregulated input voltage and the regulated output volt-
age for which the regulator will operate.
Ripple Rejection: The ratio of the peak-to-peak input ripple
voltage to the peak-to-peak output ripple voltage.
Line Regulation: The change in output voltage for a change
in the input voltage. The measurement is made under con-
ditions of low dissipation or by using pulse techniques such
that the average chip temperature is not significantly af-
fected.
Temperature Stability of VO: The percentage change in
output voltage for a thermal variation from room temperature
to either temperature extreme.
Load Regulation: The change in output voltage for a
change in load current at constant chip temperature.
7
www.national.com
Typical Applications
5V to 20V Adjustable Regulator
00882303
Note: Using 1k for R1 will ensure that the input bias current error of the adjust pin will be negligible. Do not bypass R1 or R2. This will lead to instabilities.
* Required if regulator is located far from power supply filter.
*
* C
must be at least 22 µF to maintain stability. May be increased without bound to maintain regulation during transients. Locate as close as possible to the
OUT
regulator. This capacitor must be rated over the same operating temperature range as the regulator and the ESR is critical; see curve.
1A Switch
00882306
**
* To assure shutdown, select Resistor R3 to guarantee at least 300 µA of pull-up current when S1 is open. (Assume 2V at the ON/OFF pin.)
www.national.com
8
Equivalent Schematic Diagram
00882301
9
www.national.com
Physical Dimensions inches (millimeters)
unless otherwise noted
Order Number LM2941J/883
5962-9166701QEA
NS Package Number J16A
Order Number LM2941WG/883
5962-9166701QYA
NS Package Number WG16A
www.national.com
10
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
Order Number LM2941T or LM2941CT
NS Package Number T05A
11
www.national.com
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
TO-263 5-Lead Plastic Surface Mount Package
Order Number LM2941S or LM2941CS
NS Package Number TS5B
www.national.com
12
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
8-Lead LLP Surface Mount Package
Order Number LM2941LD
NS Package Number LDC08A
LIFE SUPPORT POLICY
NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL
COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein:
1. Life support devices or systems are devices or
systems which, (a) are intended for surgical implant
into the body, or (b) support or sustain life, and
whose failure 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 reasonably expected to cause the failure of
the life support device or system, or to affect its
safety or effectiveness.
National Semiconductor
Corporation
Americas
National Semiconductor
Europe
National Semiconductor
Asia Pacific Customer
Response Group
Tel: 65-2544466
Fax: 65-2504466
National Semiconductor
Japan Ltd.
Tel: 81-3-5639-7560
Fax: 81-3-5639-7507
Fax: +49 (0) 180-530 85 86
Email: support@nsc.com
Email: europe.support@nsc.com
Deutsch Tel: +49 (0) 69 9508 6208
English Tel: +44 (0) 870 24 0 2171
Français Tel: +33 (0) 1 41 91 8790
Email: ap.support@nsc.com
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.
See Wireless Products
Products > Analog - Regulators > Linear Regulators - Low Dropout Voltage > Positive Voltage - Adjustable
> LM2941
LM2941 Product Folder
1A Low Dropout Adjustable Regulator
Generic P/N 2941
General
Description
Package
& Models
Samples
& Pricing
Features
Datasheet
Parametric Table
Parametric Table
Multiple Output Capability
On/Off Pin
No
Dropout Voltage, typ (Volt)
Quiescent Current, typ (mA)
Secondary Ouput Voltage (Volt)
Secondary Output Current (Amp)
Output Voltage, min (Volt)
Output Voltage, max (Volt)
Watchdog
.50
10
-
Yes
Error Flag
No
Input Voltage, min (Volt)
Input Voltage, max (Volt)
Output Current, max
-15
-
26
5
1000 mA
20
-
Datasheet
Size in
Kbytes
Title
Date
Receive via
Email
Download
View Online
11-
Dec-
01
Receive via
Email
362
Kbytes
View Online Download
LM2941 LM2941C 1A Low Dropout Adjustable Regulator
LM2941 LM2941C 1A Low Dropout Adjustable Regulator
(JAPANESE)
189
Kbytes
View Online Download
Receive via
Receive via
Email
215
Kbytes
View Online Download
LM2941 Mil-Aero Datasheet MNLM2941-X
If you have trouble printing or viewing PDF file(s), see Printing Problems.
Package Availability, Models, Samples & Pricing
Budgetary
Pricing
Samples &
Electronic
Orders
Std
Pack
Size
Package
Models
Package
Marking
Part Number
Status
Type Pins MSL
SPICE IBIS
Qty $US each
Samples
reel
of
1000
[logo]
¢U¢Z¢2¢T
L2941LD
Full
production
LLP
LLP
MSL
MSL
MSL
LM2941LD
LM2941LDX
LM2941T
8
8
5
N/A
N/A
N/A
N/A
N/A
N/A
1K+
1K+
1K+
$0.6500
$0.6500
$0.7500
Buy Now
reel
of
4500
[logo]
¢U¢Z¢2¢T
L2941LD
Full
production
24 Hour
rail
of
45
[logo]¢U¢Z¢2¢T
LM2941T
P+
Full
production
TO 220
TO 263
Buy Now
24 Hour
rail
of
45
[logo]¢U¢Z¢2¢T
LM2941S
P+
Full
production
MSL
LM2941S
5
N/A
N/A
1K+
1K+
$0.6200
$0.6200
Buy Now
reel
of
500
[logo]¢U¢Z¢2¢T
LM2941S
P+
Full
production
TO 263
CERDIP
MSL
MSL
MSL
LM2941SX
5
N/A
N/A
N/A
N/A
N/A
Buy Now
Buy Now
rail [logo]¢Z¢S¢4¢A$E
of LM2941J/883Q
25 5962-9166701QEA
5962-
9166701QEA
Full
production
16
16
25+ $11.7000
tray [logo]¢Z¢S¢4¢A$E
of
N/A
LM2941WG-
MPR
Ceramic
SOIC
Preliminary N/A
LM2941WG
PROTO
[logo]¢Z¢S¢4¢A$E
LM2941WG/
tray
of
42
5962-
9166701QYA
Ceramic
SOIC
Full
N/A
MSL
16
N/A
250+ $14.9000
production
883Q 5962-
9166701QYA
[logo]¢Z¢S¢4¢A$E
RM2941JX
QMLV WAFER#
¢R
rail
of
N/A
CERDIP
CERDIP
MSL
MSL
MSL
MSL
RM2941JXQMLV
16
16
16
16
Preliminary N/A
N/A
N/A
N/A
rail [logo]¢Z¢S¢4¢A$E
of LM2941J-QMLV
25 5962-9166701VEA
5962-
9166701VEA
Full
N/A
50+ $213.0000
50+ $218.0000
production
[logo]¢Z¢S¢4¢A$E
tray
of
5962-
9166701VYA
Ceramic
SOIC
Full
N/A
LM2941WG-
production
QMLV 5962-
42
9166701VYA
rail
of
[logo]¢Z¢S¢4¢A$E
LM2941J-MLS
N/A
CERDIP
LM2941J-MLS
Preliminary N/A
N/A
N/A
tray
of
N/A
LM2941-ADJ
MDC
Full
N/A
Samples
Samples
Die
-
-
-
production
wafer
jar
of
LM2941-ADJ
MWC
Full
N/A
Wafer
Die
N/A
N/A
production
N/A
tray
of
N/A
Full
N/A
LM2941 MD8
production
General Description
The LM2941 positive voltage regulator features the ability to source 1A of output current with a typical
dropout voltage of 0.5V and a maximum of 1V over the entire temperature range. Furthermore, a quiescent
current reduction circuit has been included which reduces the ground pin current when the differential
between the input voltage and the output voltage exceeds approximately 3V. The quiescent current with 1A
of output current and an input-output differential of 5V is therefore only 30 mA. Higher quiescent currents
only exist when the regulator is in the dropout mode (VIN - VOUT <= 3V).
Designed also for vehicular applications, the LM2941 and all regulated circuitry are protected from reverse
battery installations or two-battery jumps. During line transients, such as load dump when the input voltage
can momentarily exceed the specified maximum operating voltage, the regulator will automatically shut
down to protect both the internal circuits and the load. Familiar regulator features such as short circuit and
thermal overload protection are also provided.
Features
●
●
●
LLP space saving package
Output voltage adjustable from 5V to 20V
Dropout voltage typically 0.5V @ IO = 1A
●
●
●
●
●
Output current in excess of 1A
Trimmed reference voltage
Reverse battery protection
Internal short circuit current limit
Mirror image insertion protection
P+ Product Enhancement tested
TTL, CMOS compatible ON/OFF switch
●
●
[Information as of 5-Aug-2002]
Search
Design
Purchasing
Quality
Company
Home
About Languages . Website Guide . About "Cookies" . National is QS 9000 Certified . Privacy/Security Statement .
Contact Us . Site Terms & Conditions of Use . Copyright 2002 © National Semiconductor Corporation . My Preferences .
Feedback
相关型号：
©2020 ICPDF网 联系我们和版权申明