LM2937ES-12/NOPB National Semiconductor, LM2937ES-12/NOPB Datasheet

LM2937ES-12/NOPB

Manufacturer Part Number

LM2937ES-12/NOPB

Description

IC REGULATOR LDO TO-263

Manufacturer

National Semiconductor

Type

Voltage Regulatorr

Datasheets

1.LM2937IMP-5.0NOPB.pdf (13 pages)

2.LM2937ES-12NOPB.pdf (5 pages)

Specifications of LM2937ES-12/NOPB

Regulator Topology

Positive Fixed

Voltage - Output

12V

Voltage - Input

Up to 26V

Voltage - Dropout (typical)

0.11V @ 50mA

Number Of Regulators

Current - Output

500mA

Operating Temperature

-40°C ~ 125°C

Mounting Type

Surface Mount

Package / Case

TO-263-3, D²Pak (3 leads + Tab), TO-263AA

Current, Output

500 mA

Current, Supply

10 mA

Package Type

TO-263

Regulation, Line

36 mV

Regulation, Load

12 mV

Regulator Type

Low Dropout

Resistance, Thermal, Junction To Case

3 °C/W

Temperature, Operating, Range

-40 to +125 °C

Voltage, Dropout

0.5 V

Voltage, Input

26 V

Voltage, Noise

360 μV

Voltage, Output

12 V

Number Of Outputs

Polarity

Positive

Input Voltage Max

26 V

Output Voltage

12 V

Output Type

Fixed

Dropout Voltage (max)

0.25 V at 50 mA

Output Current

0.5 A

Line Regulation

36 mV

Load Regulation

12 mV

Voltage Regulation Accuracy

+/- 5 %

Maximum Operating Temperature

+ 125 C

Mounting Style

SMD/SMT

Minimum Operating Temperature

- 40 C

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Current - Limit (min)

Lead Free Status / Rohs Status

RoHS Compliant part

Other names

*LM2937ES-12
*LM2937ES-12/NOPB
LM2937ES-12

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

LM2937ES-12/NOPB

Manufacturer:

National Semiconductor

Quantity:

1 798

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LM2937

500 mA Low Dropout Regulator

General Description

The LM2937 is a positive voltage regulator capable of sup-

plying 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 oper-

ating temperature range). Special circuitry has been incor-

porated 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 stabil-

ity. 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

3Ω. 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

Connection Diagrams

TO-263 Surface-Mount Package

TO-220 Plastic Package

Front View

Top View

DS011280

01128002

01128005

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.

Features

n Fully specified for operation over −40˚C to +125˚C

n Output current in excess of 500 mA

n Output trimmed for 5% tolerance under all operating

n Typical dropout voltage of 0.5V at full rated load current

n Wide output capacitor ESR range, up to 3Ω

n Internal short circuit and thermal overload protection

n Reverse battery protection

n 60V input transient protection

n Mirror image insertion protection

conditions

SOT-223 Plastic Package

Front View

Side View

01128006

01128026

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LM2937ES-12/NOPB Summary of contents

Page 1

... Connection Diagrams TO-220 Plastic Package Front View TO-263 Surface-Mount Package Top View © 2005 National Semiconductor Corporation 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. Features n Fully specified for operation over − ...

Page 2

... T ≤ 85˚C SOT-223 LM2937IMP-5.0 J LM2937IMPX-5.0 LM2937IMP-8.0 LM2937IMPX-8.0 LM2937IMP-10 LM2937IMPX-10 LM2937IMP-12 LM2937IMPX-12 LM2937IMP-15 LM2937IMPX-15 Part Number Packaging Marking LM2937ES-5.0 LM2937ES-8.0 LM2937ES-10 LM2937ES-10 LM2937ES-12 LM2937ES-12 LM2937ES-15 LM2937ES-15 LM2937ET-5.0 LM2937ET-8.0 LM2937ET-10 LM2937ET-10 LM2937ET-12 LM2937ET-12 LM2937ET-15 LM2937ET-15 L71B L72B L73B L74B L75B 2 ...

Page 3

... 100Ω −30 − 100Ω −75 − (Note 1) −40˚C ≤ T LM2937ES J −40˚C ≤ T =400mA for the SOT-223 pack- OUTmax 8V 10V Typ Limit Typ Limit 7.76 9.70 8.00 7.60 10.00 9.50 8.24 10.30 8.40 10 ...

Page 4

Electrical Characteristics 5V, (Note 500 mA for the TO-220 and TO-263 packages NOM OUTmax age µF unless otherwise indicated. Boldface limits apply over the entire operating temperature range ...

Page 5

... Physical Dimensions inches (millimeters) unless otherwise noted TO-263 3-Lead Plastic Surface Mount Package Order Number LM2937ES-5.0, LM2937ES-8.0, LM2937ES-10, LM2937ES-12 or LM2937ES-15 Plastic Package Order Number LM2937ET-5.0, LM2937ET-8.0, LM2937ET-10, LM2937ET-12, or LM2937ET-15 NS Package Number T03B NS Package Number TS3B 12 ...

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LM2937ES-12/NOPB datasheet
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