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LM2941 MDE [TI]

耐辐射 QMLV、6V 至 26V 输入、1A 可调输出线性稳压器 | Y | 0 | -55 to 125;
LM2941 MDE
型号： LM2941 MDE
厂家： TEXAS INSTRUMENTS    TEXAS INSTRUMENTS
描述：

耐辐射 QMLV、6V 至 26V 输入、1A 可调输出线性稳压器 | Y | 0 | -55 to 125

电源电路 线性稳压器IC
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LM2941QML  
LM2941QML 1A Low Dropout Adjustable Regulator  
Literature Number: SNVS390A  
October 12, 2011  
LM2941QML  
1A Low Dropout Adjustable Regulator  
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 dif-  
ferential 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 there-  
fore only 30mA. Higher quiescent currents only exist when the  
regulator is in the dropout mode (VI − VO ≤ 3V).  
Features  
Available with radiation guarantee  
■
ELDRS Free  
100 krad(Si)  
—
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  
Originally designed 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  
Internal short circuit current limit  
Mirror image insertion protection  
TTL, CMOS compatible ON/OFF switch  
Ordering Information  
NS Part Number  
LM2941WG/883  
SMD Part Number  
5962-9166701QYA  
5962-9166701VYA  
NS Package Number  
WG16A  
Package Description  
16LD Ceramic SOIC  
LM2941WG-QMLV  
WG16A  
16LD Ceramic SOIC  
LM2941WGRLQMLV  
ELDRS FREE (Note 10)  
5962R9166702VYA  
100 krad(Si)  
WG16A  
16LD Ceramic SOIC  
LM2941GW/883  
5962-9166703QYA  
5962-9166703VYA  
WG16A  
WG16A  
16LD Ceramic SOIC  
16LD Ceramic SOIC  
LM2941GW-QMLV  
LM2941GWRLQMLV  
ELDRS FREE (Note 10)  
5962R9166704VYA  
100 krad(Si)  
WG16A  
16LD Ceramic SOIC  
Bare Die  
LM2941 MDE  
ELDRS FREE (Note 10)  
5962R9166702V9A  
100 krad(Si)  
(Note 1)  
Note 1: FOR ADDITIONAL DIE INFORMATION, PLEASE VISIT THE HI REL WEB SITE AT: www.national.com/analog/space/level_die  
Connection Diagrams  
16-Lead Ceramic Surface Mount Package  
20158532  
Top View  
See NS Package Number WG16A  
© 2011 National Semiconductor Corporation  
201585  
www.national.com  
 
Equivalent Schematic Diagram  
20158501  
www.national.com  
2
Absolute Maximum Ratings (Note 2)  
60V  
Input Voltage (Survival Voltage, ≤ 100ms)  
Internal Power Dissipation (Note 3)  
Maximum Junction Temperature  
Storage Temperature Range  
Internally Limited  
150°C  
−65°C ≤ TJ ≤ +150°C  
Lead Temperature (Soldering, 10 seconds)  
Thermal Resistance  
300°C  
ꢀθJA  
Ceramic SOIC (Still Air) 'WG'  
Ceramic SOIC (500LF/Min Air Flow) 'WG'  
Ceramic SOIC (Still Air) 'GW'  
Ceramic SOIC (500LF/Min Air Flow) 'GW'  
ꢀθJC  
122°C/W  
77°C/W  
136°C/W  
87°C/W  
Ceramic SOIC 'WG'(Note 4)  
Ceramic SOIC 'GW'  
5°C/W  
13°C/W  
Package Weight (Typ)  
Ceramic SOIC 'WG'  
Ceramic SOIC 'GW'  
ESD susceptibility to be determined. (Note 5)  
360mg  
410mg  
500V  
Recommended Operating Conditions  
Maximum Input Voltage  
Temperature Range  
26V  
−55°C ≤ TA ≤ 125°C  
Quality Conformance Inspection  
Mil-Std-883, Method 5005 - Group A  
Subgroup  
Description  
Temp °C  
1
2
Static tests at  
Static tests at  
+25  
+125  
-55  
3
Static tests at  
4
Dynamic tests at  
Dynamic tests at  
Dynamic tests at  
Functional tests at  
Functional tests at  
Functional tests at  
Switching tests at  
Switching tests at  
Switching tests at  
Settling time at  
Settling time at  
Settling time at  
+25  
+125  
-55  
5
6
7
+25  
+125  
-55  
8A  
8B  
9
+25  
+125  
-55  
10  
11  
12  
13  
14  
+25  
+125  
-55  
3
www.national.com  
LM2941 Electrical Characteristics  
DC Parameters  
The following conditions apply, unless otherwise specified.  
DC:  
5V ≤ VO ≤ 20V, VIN = VO+5V, CO = 22µF  
Sub-  
groups  
Symbol  
Parameter  
Conditions  
Notes  
Min Max  
Unit  
VRef  
VRLine  
Reference Voltage  
1.237 1.313  
1.211 1.339  
10  
V
V
1
5mA ≤ IO ≤ 1A  
2, 3  
Line Regulation  
Load Regulation  
(Note 8)  
(Note 8)  
mV/V  
1, 2, 3  
VO + 2V ≤ VIN ≤ 26V, IO = 5mA  
50mA ≤ IO ≤ 1A, VIN = 10V,  
VOUT = 5V  
10  
10  
mV/V  
mV/V  
1, 2, 3  
1, 2, 3  
VRLoad  
50mA ≤ IO ≤ 1A, VIN = 25V,  
VOUT = 20V  
15  
20  
mA  
mA  
mA  
mA  
V
1
2, 3  
1
VO + 2V ≤ VIN ≤ 26V, IO = 5mA  
IQ  
Quiescent Current  
VIN = VO + 5V, IO = 1A  
45  
60  
2, 3  
1
0.8  
1.0  
200  
300  
IO = 1A  
V
2, 3  
1
VDO  
Dropout Voltage  
mV  
mV  
A
IO = 100mA  
VIN Max = 26V  
2, 3  
1
1.6  
1.3  
3.5  
3.7  
26  
ISC  
Short Circuit Current  
A
2, 3  
1, 2, 3  
Maximum Operational Input  
Voltage  
(Note 7)  
(Note 6)  
VDC  
Reverse Polarity DC Input  
Voltage  
-15  
V
1, 2, 3  
RO = 100Ω, VO ≥ -0.6V  
VTH On  
VTh Off  
ON/OFF Threshold Voltage ON  
ON/OFF Threshold Voltage OFF  
(Note 6)  
(Note 6)  
0.8  
V
V
1, 2, 3  
1, 2, 3  
IO ≤ 1A  
IO ≤ 1A  
2.00  
100  
300  
µA  
µA  
1
ON/OFF Threshold Current  
VON/OFF = 2.0V, IO ≤ 1A  
2, 3  
AC Parameters  
The following conditions apply, unless otherwise specified.  
AC:  
5V ≤ VO ≤ 20V, VIN = VO+5V, CO = 22µF  
Sub-  
groups  
Symbol  
Parameter  
Conditions  
Notes  
Min Max  
Unit  
Maximum Line Transient  
VO Max 1V above nominal VO, RO  
= 100Ω, t ≤ 100mS  
t ≤ 100mS, RO = 100Ω  
60  
V
4, 5, 6  
4, 5, 6  
Reverse Polarity Transient Input  
Voltage  
-50  
V
ƒO = 1KHz, 1 VRMS, IL = 100mA  
ƒO = 1KHz, 1 VRMS, IL = 100mA  
(Note 9)  
(Note 9)  
0.02  
0.04  
%/V  
%/V  
4
RR  
Ripple Rejection  
5, 6  
www.national.com  
4
DC Drift Parameters  
The following conditions apply, unless otherwise specified.  
DC:  
5V ≤ VO ≤ 20V, VIN = VO+5V, CO = 22µF  
Delta calculations performed on QMLV devices at group B , subgroup 5.  
Sub-  
groups  
Symbol  
VRef  
Parameter  
Reference Voltage  
Conditions  
5mA ≤ IO ≤ 1A  
Notes  
Min Max  
-25 +25  
Unit  
mV  
1
Note 2: 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. For guaranteed specifications and test conditions, see the Electrical Characteristics. The guaranteed  
specifications apply only for the test conditions listed. Some performance characteristics may degrade when the device is not operated under the listed test  
conditions.  
Note 3: The maximum power dissipation must be derated at elevated temperatures and is dictated by TJmax (maximum junction temperature), θJA (package  
junction to ambient thermal resistance), and TA (ambient temperature). The maximum allowable power dissipation at any temperature is PDmax = (TJmax - TA)/  
θ
JA or the number given in the Absolute Maximum Ratings, whichever is lower.  
Note 4: The package material for these devices allows much improved heat transfer over our standard ceramic packages. In order to take full advantage of this  
improved heat transfer, heat sinking must be provided between the package base (directly beneath the die), and either metal traces on, or thermal vias through,  
the printed circuit board. Without this additional heat sinking, device power dissipation must be calculated using θJA, rather than θJC, thermal resistance. It must  
not be assumed that the device leads will provide substantial heat transfer out of the package, since the thermal resistance of the lead frame material is very  
poor, relative to the material of the package base. The stated θJC thermal resistance is for the package material only, and does not account for the additional  
thermal resistance between the package base and the printed circuit board. The user must determine the value of the additional thermal resistance and must  
combine this with the stated value for the package, to calculate the total allowed power dissipation for the device.  
Note 5: Human body model, 1.5 kΩ in series with 100 pF.  
Note 6: Functional test go-no-go only.  
Note 7: Condition for VIN  
Note 8: Limit = mV per volt of VO.  
Note 9: %/V = % of VIN per Volt of VO.  
Note 10: These parts are tested on a wafer by wafer basis at high and low dose rates according to MIL-STD-883 Test Method 1019 Conditions A and D with no  
enhanced low dose rate sensitivity (ELDRS). Pre and post irradiation limits are identical to those listed under AC and DC electrical characteristics.  
5
www.national.com  
 
 
 
 
 
 
 
 
 
Typical Performance Characteristics  
Dropout Voltage  
Dropout Voltage vs. Temperature  
20158511  
20158512  
Output Voltage  
Quiescent Current vs. Temperature  
20158513  
20158514  
Quiescent Current  
Quiescent Current  
20158515  
20158516  
www.national.com  
6
Line Transient Response  
Load Transient Response  
20158518  
20158517  
Ripple Rejection  
Output Impedance  
20158519  
20158520  
Low Voltage Behavior  
Low Voltage Behavior  
20158521  
20158522  
7
www.national.com  
Output Capacitor ESR  
Output at Voltage Extremes  
20158524  
20158523  
Output at Voltage Extremes  
Peak Output Current  
20158525  
20158526  
www.national.com  
8
Typical Applications  
5V to 20V Adjustable Regulator  
20158503  
Note: Using 1KΩ 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.  
** CO must be at least 22μF to maintain stability. May be increased without bound to maintain regulation during transients. Locate as close as possible to the  
regulator. This capacitor must be rated over the same operating temperature range as the regulator and the ESR is critical; see curve.  
1A Switch  
20158506  
*** To assure shutdown, select Resistor R3 to guarantee at least 300μA of pull-up current when S1 is open. (Assume 2V at the ON/OFF pin.)  
9
www.national.com  
Revision History Section  
Released  
Revision  
Section  
Changes  
08/25/09  
A
New Release, Corporate format  
1 MDS data sheet converted into one Corp. data  
sheet format. Added Radiation products to ordering  
table. MNLM2941-X Rev 4A1 will be archived.  
12–Oct-2011  
B
Ordering Information, Absolute Max Ratings Ordering Information — Added LM2941GW/883,  
LM2941GW-QMLV and LM2941GWRLQMLV.  
Absolute Max — Added Theta JA and Theta JC  
along with Package weight of 'GW' devices.  
RatingsLM2941QML Rev A will be archived.  
www.national.com  
10  
Physical Dimensions inches (millimeters) unless otherwise noted  
16LD Ceramic SOIC  
NS Package Number WG16A  
11  
www.national.com  
Notes  
For more National Semiconductor product information and proven design tools, visit the following Web sites at:  
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www.national.com/refdesigns  
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www.national.com/evalboards  
www.national.com/packaging  
www.national.com/quality/green  
www.national.com/contacts  
www.national.com/quality  
www.national.com/feedback  
www.national.com/easy  
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Interface  
Reference Designs  
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