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  LM2937 - 500 mA Low Dropout Regulator

Datasheet Packaging Samples & Pricing Reliability Application Notes Knowledge Base

Features
Fully specified for operation over -40°C to +125°C
Output current in excess of 500 mA
Output trimmed for 5% tolerance under all operating conditions
Typical dropout voltage of 0.5V at full rated load current
Wide output capacitor ESR range, up to 3
Internal short circuit and thermal overload protection
Reverse battery protection
60V input transient protection
Mirror image insertion protection

General Description


The LM2937 is a positive voltage regulator capable of supplying up to 500 mA of load current. More...

  Typical Application
click for larger image


Parametric Table     expand
Parametric Table    collapse
Output Current 500 mA
Output Min 12, 15, 8, 10, 5 Volt
Dropout Voltage 0.5 Volt
Adjustable Output No
Quiescent Current 2 mA
Output Current 500 mA
Input Max Voltage 26 Volt
Output Min 12, 15, 8, 10, 5 Volt
Dropout Voltage 0.5 Volt
Adjustable Output No
Quiescent Current 2 mA
On/Off Pin No
Error Flag No
RegType LDO
Temperature Min -40 deg C
Temperature Max 125 deg C
Output Max 12, 15, 8, 10, 5 Volt
Output Voltage 12, 15, 8, 10, 5 Volt
View Using Catalog


Typical Performance


click for larger image


  Also Recommended
LP38691Higher Load Capability, Lower Supply Current, Stable With Lower ESR Ceramic Output Cap
LP38693Higher Load Capability, Lower Supply Current, Stable With Lower ESR Ceramic Output Cap
LP3878-ADJHigher Load Capability, Lower Supply Current, Stable With Lower ESR Ceramic Output Cap
LM2937-2.52.5V Output Voltage
LM2937-3.33.3V Output Voltage
LP2989Better Performance, Lower Voltage

Additional Resources


Application Notes (see below)


Connection Diagram


click for larger image



Datasheet
RoHS Compliance Information Size in KbytesDate Click link below to View Online Click link below to Download Click link below to Receive via Email
LM2937 500 mA Low Dropout Regulator 746 Kbytes 29-Aug-05 View Online Download Receive via Email
LM2937 500 mA Low Dropout Regulator (Japanese)
520 Kbytes   View Online Download Receive via Email

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Package Availability, Models, Samples & Pricing
Part NumberPackageFactory Lead TimeModelsSamples &
Electronic
Orders
Budgetary PricingStd
Pack
Size
Package
Marking
Format
TypePinsSpec.MSL
Rating
Peak
Reflow
RoHS
Report
CAD
Symbols
WeeksQtyQty$US each
LM2937IMP-10SOT-2234STD
NOPB
1
1
260
260
RoHS Download Full productionN/A
Samples
Buy Now
1K+$0.69reel
of
1000
XYTT
L73B
6 weeks2500
LM2937IMP-12SOT-2234NOPB1260RoHS Download Full productionN/A
Samples
Buy Now
1K+$0.69reel
of
1000
XYTT
L74B
6 weeks2000
LM2937IMP-15SOT-2234STD
NOPB
1
1
260
260
RoHS Download Full productionN/A
 
Buy Now
1K+$0.69reel
of
1000
XYTT
L75B
6 weeks2000
LM2937IMP-5.0SOT-2234STD
NOPB
1
1
260
260
RoHS Download Full productionN/A
Samples
Buy Now
1K+$0.69reel
of
1000
XYTT
L71B
6 weeks2000
LM2937IMP-8.0SOT-2234NOPB1260RoHS Download Full productionN/A
Samples
Buy Now
1K+$0.69reel
of
1000
XYTT
L72B
6 weeks2000
LM2937IMPX-10SOT-2234NOPB1260RoHS Download Full productionN/A
 
Buy Now
1K+$0.69reel
of
2000
XYTT
L73B
8 weeks7500
LM2937IMPX-12SOT-2234STD
NOPB
1
1
260
260
RoHS Download Full productionN/A
 
Buy Now
1K+$0.69reel
of
2000
XYTT
L74B
6 weeks5000
LM2937IMPX-15SOT-2234NOPB1260RoHS Download Full productionN/A
 
Buy Now
1K+$0.69reel
of
2000
XYTT
L75B
6 weeks2500
LM2937IMPX-5.0SOT-2234STD
NOPB
1
1
260
260
RoHS Download Full productionN/A
 
Buy Now
1K+$0.69reel
of
2000
XYTT
L71B
6 weeks5000
LM2937IMPX-8.0SOT-2234STD
NOPB
1
1
260
260
RoHS Download Full productionN/A
 
Buy Now
1K+$0.69reel
of
2000
XYTT
L72B
6 weeks2500
LM2937ET-10TO-2203NOPB1NARoHS Download Full productionN/A
Samples
Buy Now
1K+$0.78rail
of
45
NSUZXYTT
LM2937ET
-10
8 weeks1000
LM2937ET-12TO-2203STD
NOPB
1
1
NA
NA
RoHS Download Full productionN/A
Samples
Buy Now
1K+$0.78rail
of
45
NSUZXYTT
LM2937ET
-12
8 weeks1000
LM2937ET-15TO-2203STD
NOPB
1
1
NA
NA
RoHS Download Full productionN/A
Samples
Buy Now
1K+$0.78rail
of
45
NSUZXYTT
LM2937ET
-15
8 weeks1000
LM2937ET-5.0TO-2203STD
NOPB
1
1
NA
NA
RoHS Download Full productionN/A
Samples
Buy Now
1K+$0.78rail
of
45
NSUZXYTT
LM2937ET
-5.0
8 weeks2000
LM2937ET-8.0TO-2203NOPB1NARoHS Download Full productionN/A
Samples
Buy Now
1K+$0.78rail
of
45
NSUZXYTT
LM2937ET
-8.0
8 weeks500
LM2937ES-10TO-2633NOPB3245RoHS Download Full productionN/A
Samples
Buy Now
1K+$0.88rail
of
45
NSUZXYTT
LM2937ES
-10
6 weeks2000
LM2937ES-12TO-2633STD
NOPB
3
3
235
245
RoHS Download Full productionN/A
Samples
Buy Now
1K+$0.88rail
of
45
NSUZXYTT
LM2937ES
-12
8 weeks1000
LM2937ES-15TO-2633STD
NOPB
3
3
235
245
RoHS Download Full productionN/A
Samples
Buy Now
1K+$0.88rail
of
45
NSUZXYTT
LM2937ES
-15
8 weeks1000
LM2937ES-5.0TO-2633STD
NOPB
3
3
235
245
RoHS Download Full productionN/A
Samples
Buy Now
1K+$0.88rail
of
45
NSUZXYTT
LM2937ES
-5.0
12 weeks5000
LM2937ES-8.0TO-2633NOPB3245RoHS Download Full productionN/A
Samples
Buy Now
1K+$0.88rail
of
45
NSUZXYTT
LM2937ES
-8.0
8 weeks1000
LM2937ESX-10TO-2633STD
NOPB
3
3
235
245
RoHS Download Full productionN/A
 
Buy Now
1K+$0.88reel
of
500
NSUZXYTT
LM2937ES
-10
8 weeks7500
LM2937ESX-12TO-2633NOPB3245RoHS Download Full productionN/A
 
Buy Now
1K+$0.88reel
of
500
NSUZXYTT
LM2937ES
-12
6 weeks2000
LM2937ESX-15TO-2633NOPB3245RoHS Download Full productionN/A
 
Buy Now
1K+$0.88reel
of
500
NSUZXYTT
LM2937ES
-15
8 weeks7500
LM2937ESX-5.0TO-2633STD
NOPB
3
3
235
245
RoHS Download Full productionN/A
 
Buy Now
1K+$0.88reel
of
500
NSUZXYTT
LM2937ES
-5.0
6 weeks7500
LM2937ESX-8.0TO-2633STD
NOPB
3
3
235
245
RoHS Download Full productionN/A
 
Buy Now
1K+$0.88reel
of
500
NSUZXYTT
LM2937ES
-8.0
8 weeks10000
LM2937E-5.0 MWCWaferFull productionN/A
  CALLwafer jar
of
N/A
-
N/AN/A

General Description


The LM2937 is a positive voltage regulator capable of supplying up to 500 mA of load current. The use of a PNP power transistor provides a low dropout voltage characteristic. With a load current of 500 mA the minimum input to output voltage differential required for the output to remain in regulation is typically 0.5V (1V guaranteed maximum over the full operating temperature range). Special circuitry has been incorporated to minimize the quiescent current to typically only 10 mA with a full 500 mA load current when the input to output voltage differential is greater than 3V.

The LM2937 requires an output bypass capacitor for stability. As with most low dropout regulators, the ESR of this capacitor remains a critical design parameter, but the LM2937 includes special compensation circuitry that relaxes ESR requirements. The LM2937 is stable for all ESR below 3. This allows the use of low ESR chip capacitors.

Ideally suited for automotive applications, the LM2937 will protect itself and any load circuitry from reverse battery connections, two-battery jumps and up to +60V/-50V load dump transients. Familiar regulator features such as short circuit and thermal shutdown protection are also built in.

Reliability Metrics


Part Number Process Early Failure Rate - Rejects Sample Size (EFR) PPM * Rel. Rejects Device Hours Long Term Failure Rates (FITS) MTTF
LM2937E-5.0 MWCSLM0330200016875003478832732
LM2937ES-10SLM0330200016875003478832732
LM2937ES-12SLM0330200016875003478832732
LM2937ES-15SLM0330200016875003478832732
LM2937ES-5.0SLM0330200016875003478832732
LM2937ES-8.0SLM0330200016875003478832732
LM2937ESX-10SLM0330200016875003478832732
LM2937ESX-12SLM0330200016875003478832732
LM2937ESX-15SLM0330200016875003478832732
LM2937ESX-5.0SLM0330200016875003478832732
LM2937ESX-8.0SLM0330200016875003478832732
LM2937ET-10SLM0330200016875003478832732
LM2937ET-12SLM0330200016875003478832732
LM2937ET-15SLM0330200016875003478832732
LM2937ET-5.0SLM0330200016875003478832732
LM2937ET-8.0SLM0330200016875003478832732
LM2937IMP-10SLM0330200016875003478832732
LM2937IMP-12SLM0330200016875003478832732
LM2937IMP-15SLM0330200016875003478832732
LM2937IMP-5.0SLM0330200016875003478832732
LM2937IMP-8.0SLM0330200016875003478832732
LM2937IMPX-10SLM0330200016875003478832732
LM2937IMPX-12SLM0330200016875003478832732
LM2937IMPX-15SLM0330200016875003478832732
LM2937IMPX-5.0SLM0330200016875003478832732
LM2937IMPX-8.0SLM0330200016875003478832732

For more information on Reliability Metrics, please click here.


Application Notes


TitleSize in Kbytes Date Click link below to View Online Click link below to Download Click link below to Receive via Email
AN-1641: Application Note 1641 LM2747-19A Demo Board 2571 Kbytes 17-May-07 View Online Download Receive via Email
AN-1573: Application Note 1573 LM2745-19A Demo Board 2572 Kbytes 17-May-07 View Online Download Receive via Email
AN-1603: Application Note 1603 LM274X Reference Designs 431 Kbytes 6-Dec-07 View Online Download Receive via Email
AN-1603 (Chinese): Application Note 1603 LM274X Reference Designs
482 Kbytes  

If you have trouble printing or viewing PDF file(s), see Printing Problems.

[Information as of 15-May-2008]

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