LM2937ET-3.3/NOPB National Semiconductor, LM2937ET-3.3/NOPB Datasheet

LM2937ET-3.3/NOPB

Manufacturer Part Number

LM2937ET-3.3/NOPB

Description

IC REGULATOR LDO TO220-3

Manufacturer

National Semiconductor

Type

Voltage Regulatorr

Datasheets

1.LM2937IMP-3.3NOPB.pdf (11 pages)

2.LM2937ET-3.3NOPB.pdf (4 pages)

Specifications of LM2937ET-3.3/NOPB

Regulator Topology

Positive Fixed

Voltage - Output

3.3V

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

Through Hole

Package / Case

TO-220-3 (Straight Leads)

Current, Output

500 mA

Current, Supply

10 mA

Package Type

TO-220

Regulation, Line

9.9 mV

Regulation, Load

3.3 mV

Regulator Type

Positive Voltage Out

Resistance, Thermal, Junction To Case

3 °C/W

Temperature, Operating, Range

-40 to +125 °C

Voltage, Input

26 V

Voltage, Noise

99 μV

Voltage, Output

3.3 V

Voltage Regulator Type

Linear

Topology

LDO

Regulator Output Type

Fixed

Polarity Type

Positive

Number Of Outputs

Single

Input Voltage (min)

4.75V

Input Voltage (max)

26V

Output Voltage

3.3V

Output Current

500mA

Load Regulation

3.3mV

Line Regulation

9.9mV

Output Voltage Accuracy

±5%

Operating Temp Range

-40C to 125C

Operating Temperature Classification

Automotive

Pin Count

3 +Tab

Mounting

Through Hole

Polarity

Positive

Input Voltage Max

26 V

Output Type

Fixed

Voltage Regulation Accuracy

+/- 5 %

Maximum Operating Temperature

+ 125 C

Mounting Style

Through Hole

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 Electrostatic Device

Other names

*LM2937ET-3.3
*LM2937ET-3.3/NOPB
LM2937ET-3.3

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

LM2937ET-3.3/NOPB

Manufacturer:

TOSHIBA

Quantity:

6 500

Current page: 1 of 4
Download datasheet (515Kb)

LM2937-2.5, LM2937-3.3

400mA and 500mA Voltage Regulators

General Description

The LM2937-2.5 and LM2937-3.3 are positive voltage regu-

lators capable of supplying up to 500 mA of load current.

Both regulators are ideal for converting a common 5V logic

supply, or higher input supply voltage, to the lower 2.5V and

3.3V supplies to power VLSI ASIC’s and microcontrollers.

Special circuitry has been incorporated to minimize the qui-

escent current to typically only 10 mA with a full 500 mA load

current when the input to output voltage differential is greater

than 5V.

The LM2937 requires an output bypass capacitor for stabil-

ity. As with most regulators utilizing a PNP pass transistor,

the ESR of this capacitor remains a critical design param-

eter, but the LM2937-2.5 and LM2937-3.3 include special

compensation circuitry that relaxes ESR requirements. The

LM2937 is stable for all ESR ratings less than 5Ω. This

allows the use of low ESR chip capacitors.

The regulators are also suited for automotive applications,

with built in protection from reverse battery connections,

Connection Diagrams and Ordering Information

TO-263 Surface-Mount Package

Order Number LM2937ET-2.5, LM2937ET-3.3,

See NS Package Number T03B

TO-220 Plastic Package

Front View

Top View

Order Number LM2937ES-2.5, LM2937ES-3.3,

10011324

10011326

See NS Package Number TS3B

two-battery jumps and up to +60V/−50V load dump tran-

sients. 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 (400mA for

n Output trimmed for 5% tolerance under all operating

n Wide output capacitor ESR range, 0.01Ω up to 5Ω

n Internal short circuit and thermal overload protection

n Reverse battery protection

n 60V input transient protection

n Mirror image insertion protection

SOT-223 package)

conditions

Order Number LM2937IMP-2.5, LM2937IMP-3.3,

See NS Package Number MA04A

SOT-223 Plastic Package

Front View

Side View

10011327

10011325

Related parts for LM2937ET-3.3/NOPB

LM2937ET-3.3/NOPB Summary of contents

Page 1

... The regulators are also suited for automotive applications, with built in protection from reverse battery connections, Connection Diagrams and Ordering Information TO-220 Plastic Package Front View Order Number LM2937ET-2.5, LM2937ET-3.3, See NS Package Number T03B TO-263 Surface-Mount Package Top View Order Number LM2937ES-2.5, LM2937ES-3.3, two-battery jumps and up to +60V/− ...

Page 2

... Markings The small physical size of the SOT-223 package does not allow sufficient space to provide the complete device part number. The actual devices will be labeled with the package markings shown. Output Voltage 2.5 3.3 LM2937ES-3.3 LM2937ET-3.3 LM2937IMP-3.3 L68B L69B 2 (Continued) NSC Package ...

Page 3

... J (Note 1) SOT-223 (Vapor Phase, 60 seconds) 215˚C SOT-223 (Infrared, 15 seconds) ESD Susceptibility (Note 3) Operating Conditions 26V Temperature Range (Note 2) 60V LM2937ES, LM2937ET Internally Limited 150˚C −65˚C to +150˚C LM2937IMP Input Voltage Range 260˚C 230˚C (Note 25˚ ...

Page 4

... Physical Dimensions inches (millimeters) unless otherwise noted TO-263 3-Lead Plastic Surface Mount Package Order Number LM2937ES-2.5, LM2937ES-3.3, Plastic Package Order Number LM2937ET-2.5, LM2937ET-3.3, NS Package Number T03B NS Package Number TS3B 10 ...

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