LM2937 - 500 mA Low Dropout Regulator

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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

LP38691	Higher Load Capability, Lower Supply Current, Stable With Lower ESR Ceramic Output Cap
LP38693	Higher Load Capability, Lower Supply Current, Stable With Lower ESR Ceramic Output Cap
LP3878-ADJ	Higher Load Capability, Lower Supply Current, Stable With Lower ESR Ceramic Output Cap
LM2937-2.5	2.5V Output Voltage
LM2937-3.3	3.3V Output Voltage
LP2989	Better Performance, Lower Voltage

Additional Resources

Application Notes (see below)

Connection Diagram

click for larger image

Datasheet

RoHS Compliance Information	Size in Kbytes	Date
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

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Package Availability, Models, Samples & Pricing

Part Number

Package

Factory Lead Time

Models

Samples &
Electronic
Orders

Budgetary Pricing

Std
Pack
Size

Package
Marking
Format

Type

Pins

Spec.

MSL
Rating

Peak
Reflow

RoHS
Report

CAD
Symbols

Qty

Qty

$US each

LM2937IMP-10

4

STD

NOPB

1

1

260

260

Full production

N/A

Samples

1K+

$0.69

reel
of
1000

6 weeks

2500

LM2937IMP-12

4

NOPB

1

260

Full production

N/A

Samples

1K+

$0.69

reel
of
1000

6 weeks

2000

LM2937IMP-15

4

STD

NOPB

1

1

260

260

Full production

N/A

1K+

$0.69

reel
of
1000

6 weeks

2000

LM2937IMP-5.0

4

STD

NOPB

1

1

260

260

Full production

N/A

Samples

1K+

$0.69

reel
of
1000

6 weeks

2000

LM2937IMP-8.0

4

NOPB

1

260

Full production

N/A

Samples

1K+

$0.69

reel
of
1000

6 weeks

2000

LM2937IMPX-10

4

NOPB

1

260

Full production

N/A

1K+

$0.69

reel
of
2000

8 weeks

7500

LM2937IMPX-12

4

STD

NOPB

1

1

260

260

Full production

N/A

1K+

$0.69

reel
of
2000

6 weeks

5000

LM2937IMPX-15

4

NOPB

1

260

Full production

N/A

1K+

$0.69

reel
of
2000

6 weeks

2500

LM2937IMPX-5.0

4

STD

NOPB

1

1

260

260

Full production

N/A

1K+

$0.69

reel
of
2000

6 weeks

5000

LM2937IMPX-8.0

4

STD

NOPB

1

1

260

260

Full production

N/A

1K+

$0.69

reel
of
2000

6 weeks

2500

LM2937ET-10

3

NOPB

1

NA

Full production

N/A

Samples

1K+

$0.78

rail
of
45

NSUZXYTT
LM2937ET
-10

8 weeks

1000

LM2937ET-12

3

STD

NOPB

1

1

NA

NA

Full production

N/A

Samples

1K+

$0.78

rail
of
45

NSUZXYTT
LM2937ET
-12

8 weeks

1000

LM2937ET-15

3

STD

NOPB

1

1

NA

NA

Full production

N/A

Samples

1K+

$0.78

rail
of
45

NSUZXYTT
LM2937ET
-15

8 weeks

1000

LM2937ET-5.0

3

STD

NOPB

1

1

NA

NA

Full production

N/A

Samples

1K+

$0.78

rail
of
45

NSUZXYTT
LM2937ET
-5.0

8 weeks

2000

LM2937ET-8.0

3

NOPB

1

NA

Full production

N/A

Samples

1K+

$0.78

rail
of
45

NSUZXYTT
LM2937ET
-8.0

8 weeks

500

LM2937ES-10

3

NOPB

3

245

Full production

N/A

Samples

1K+

$0.88

rail
of
45

NSUZXYTT
LM2937ES
-10

6 weeks

2000

LM2937ES-12

3

STD

NOPB

3

3

235

245

Full production

N/A

Samples

1K+

$0.88

rail
of
45

NSUZXYTT
LM2937ES
-12

8 weeks

1000

LM2937ES-15

3

STD

NOPB

3

3

235

245

Full production

N/A

Samples

1K+

$0.88

rail
of
45

NSUZXYTT
LM2937ES
-15

8 weeks

1000

LM2937ES-5.0

3

STD

NOPB

3

3

235

245

Full production

N/A

Samples

1K+

$0.88

rail
of
45

NSUZXYTT
LM2937ES
-5.0

12 weeks

5000

LM2937ES-8.0

3

NOPB

3

245

Full production

N/A

Samples

1K+

$0.88

rail
of
45

NSUZXYTT
LM2937ES
-8.0

8 weeks

1000

LM2937ESX-10

3

STD

NOPB

3

3

235

245

Full production

N/A

1K+

$0.88

reel
of
500

NSUZXYTT
LM2937ES
-10

8 weeks

7500

LM2937ESX-12

3

NOPB

3

245

Full production

N/A

1K+

$0.88

reel
of
500

NSUZXYTT
LM2937ES
-12

6 weeks

2000

LM2937ESX-15

3

NOPB

3

245

Full production

N/A

1K+

$0.88

reel
of
500

NSUZXYTT
LM2937ES
-15

8 weeks

7500

LM2937ESX-5.0

3

STD

NOPB

3

3

235

245

Full production

N/A

1K+

$0.88

reel
of
500

NSUZXYTT
LM2937ES
-5.0

6 weeks

7500

LM2937ESX-8.0

3

STD

NOPB

3

3

235

245

Full production

N/A

1K+

$0.88

reel
of
500

NSUZXYTT
LM2937ES
-8.0

8 weeks

10000

LM2937E-5.0 MWC

Full production

N/A

wafer jar
of
N/A

N/A

N/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 MWC	SLM	0	33020	0	0	1687500	3	478832732
LM2937ES-10	SLM	0	33020	0	0	1687500	3	478832732
LM2937ES-12	SLM	0	33020	0	0	1687500	3	478832732
LM2937ES-15	SLM	0	33020	0	0	1687500	3	478832732
LM2937ES-5.0	SLM	0	33020	0	0	1687500	3	478832732
LM2937ES-8.0	SLM	0	33020	0	0	1687500	3	478832732
LM2937ESX-10	SLM	0	33020	0	0	1687500	3	478832732
LM2937ESX-12	SLM	0	33020	0	0	1687500	3	478832732
LM2937ESX-15	SLM	0	33020	0	0	1687500	3	478832732
LM2937ESX-5.0	SLM	0	33020	0	0	1687500	3	478832732
LM2937ESX-8.0	SLM	0	33020	0	0	1687500	3	478832732
LM2937ET-10	SLM	0	33020	0	0	1687500	3	478832732
LM2937ET-12	SLM	0	33020	0	0	1687500	3	478832732
LM2937ET-15	SLM	0	33020	0	0	1687500	3	478832732
LM2937ET-5.0	SLM	0	33020	0	0	1687500	3	478832732
LM2937ET-8.0	SLM	0	33020	0	0	1687500	3	478832732
LM2937IMP-10	SLM	0	33020	0	0	1687500	3	478832732
LM2937IMP-12	SLM	0	33020	0	0	1687500	3	478832732
LM2937IMP-15	SLM	0	33020	0	0	1687500	3	478832732
LM2937IMP-5.0	SLM	0	33020	0	0	1687500	3	478832732
LM2937IMP-8.0	SLM	0	33020	0	0	1687500	3	478832732
LM2937IMPX-10	SLM	0	33020	0	0	1687500	3	478832732
LM2937IMPX-12	SLM	0	33020	0	0	1687500	3	478832732
LM2937IMPX-15	SLM	0	33020	0	0	1687500	3	478832732
LM2937IMPX-5.0	SLM	0	33020	0	0	1687500	3	478832732
LM2937IMPX-8.0	SLM	0	33020	0	0	1687500	3	478832732

For more information on Reliability Metrics, please click here.

Application Notes

Title	Size in Kbytes	Date
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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