LM350AT/NOPB National Semiconductor, LM350AT/NOPB Datasheet

LM350AT/NOPB

Manufacturer Part Number

LM350AT/NOPB

Description

IC REGULATOR ADJ 3A TO220-3

Manufacturer

National Semiconductor

Type

Voltage Regulatorr

Datasheets

1.LM350TNOPB.pdf (14 pages)

2.LM350TNOPB.pdf (4 pages)

Specifications of LM350AT/NOPB

Regulator Topology

Positive Adjustable

Voltage - Output

1.2 ~ 33 V

Voltage - Input

4.2 ~ 35 V

Number Of Regulators

Current - Output

Current - Limit (min)

Operating Temperature

-40°C ~ 125°C

Mounting Type

Through Hole

Package / Case

TO-220-3 (Straight Leads)

Current, Output

3 A

Package Type

TO-220

Regulation, Line

0.005 %/V

Regulation, Load

0.1 %

Regulator Type

Positive Voltage Out

Resistance, Thermal, Junction To Case

3 °C/W

Temperature, Operating, Range

-40 to +125 °C

Voltage, Input

35 V

Voltage, Noise

0.001 %

Voltage, Output

1.2 to 33 V

Voltage, Supply, Rejection Ratio

65 dB

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Voltage - Dropout (typical)

Lead Free Status / Rohs Status

RoHS Compliant part Electrostatic Device

Other names

*LM350AT
*LM350AT/NOPB
LM350AT

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

LM350AT/NOPB

Manufacturer:

NS/国半

Quantity:

20 000

Current page: 1 of 14
Download datasheet (409Kb)

LM150/LM350A/LM350

3-Amp Adjustable Regulators

General Description

The LM150 series of adjustable 3-terminal positive voltage

regulators is capable of supplying in excess of 3A over a

1.2V to 33V output range. They are exceptionally easy to

use and require only 2 external resistors to set the output

voltage. Further, both line and load regulation are compa-

rable to discrete designs. Also, the LM150 is packaged in

standard transistor packages which are easily mounted and

handled.

In addition to higher performance than fixed regulators, the

LM150 series offers full overload protection available only in

IC’s. Included on the chip are current limit, thermal overload

protection and safe area protection. All overload protection

circuitry remains fully functional even if the adjustment termi-

nal is accidentally disconnected.

Normally, no capacitors are needed unless the device is situ-

ated more than 6 inches from the input filter capacitors in

which case an input bypass is needed. An output capacitor

can be added to improve transient response, while bypass-

ing the adjustment pin will increase the regulator’s ripple re-

jection.

Besides replacing fixed regulators or discrete designs, the

LM150 is useful in a wide variety of other applications. Since

the regulator is “floating” and sees only the input-to-output

differential voltage, supplies of several hundred volts can be

regulated as long as the maximum input to output differential

is not exceeded, i.e., avoid short-circuiting the output.

By connecting a fixed resistor between the adjustment pin

and output, the LM150 can be used as a precision current

Connection Diagrams

Case is Output

See NS Package Number K02A

See NS Package Number K02C

Order Number LM150K STEEL

Order Number LM150K/883

Metal Can Package

or LM350K STEEL

(TO-3 STEEL)

Bottom View

DS009061-4

DS009061

regulator. Supplies with electronic shutdown can be

achieved by clamping the adjustment terminal to ground

which programs the output to 1.2V where most loads draw

little current.

The part numbers in the LM150 series which have a K suffix

are packaged in a standard Steel TO-3 package, while those

with a T suffix are packaged in a TO-220 plastic package.

The LM150 is rated for −55˚C

LM350A is rated for −40˚C

rated for 0˚C

Features

n Adjustable output down to 1.2V

n Guaranteed 3A output current

n Guaranteed thermal regulation

n Output is short circuit protected

n Current limit constant with temperature

n P

n 86 dB ripple rejection

n Guaranteed 1% output voltage tolerance (LM350A)

n Guaranteed max. 0.01%/V line regulation (LM350A)

n Guaranteed max. 0.3% load regulation (LM350A)

Applications

n Adjustable power supplies

n Constant current regulators

n Battery chargers

Product Enhancement tested

Order Number LM350AT or LM350T

See NS Package Number T03B

+125˚C.

Plastic Package

Front View

(TO-220)

+125˚C, and the LM350 is

+150˚C, while the

DS009061-5

www.national.com

May 1998

Related parts for LM350AT/NOPB

LM350AT/NOPB Summary of contents

Page 1

... Order Number LM150K STEEL or LM350K STEEL See NS Package Number K02A Order Number LM150K/883 See NS Package Number K02C © 1999 National Semiconductor Corporation DS009061 regulator. Supplies with electronic shutdown can be achieved by clamping the adjustment terminal to ground which programs the output to 1.2V where most loads draw little current ...

Page 2

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. (Note 4) Power Dissipation Input-Output Voltage Differential Storage Temperature Electrical Characteristics Specifications with standard type face are for T ture Range. Unless otherwise specified, V ...

Page 3

Electrical Characteristics Specifications with standard type face are for T ture Range. Unless otherwise specified, V Parameter Temperature Stability T T MIN J Minimum Load Current V − OUT Current Limit V − OUT V − ...

Page 4

Typical Performance Characteristics Ripple Rejection DS009061-39 Output Impedance DS009061-42 www.national.com (Continued) Ripple Rejection DS009061-40 Line Transient Response DS009061-43 4 Ripple Rejection DS009061-41 Load Transient Response DS009061-44 ...

Page 5

Application Hints In operation, the LM150 develops a nominal 1.25V reference voltage between the output and adjustment terminal. REF The reference voltage is impressed across program resistor R1 and, since the voltage is constant, a constant current I ...

Page 6

Application Hints (Continued) less and 10 µF capacitance. Figure 3 shows an LM150 with protection diodes included for use with outputs greater than 25V and high values of output capacitance. Schematic Diagram www.national.com D1 protects against C1 D2 protects against ...

Page 7

Typical Applications 1.2V–25V Adjustable Regulator Full output current not available at high input-output voltages. † Optional — improves transient response. Output capacitors in the range of 1 µF to 1000 µF of aluminum or tantalum electrolytic are commonly used to ...

Page 8

Typical Applications (Continued) Digitally Selected Outputs *Sets maximum V OUT *Minimum load current 50 mA www.national.com Regulator and Voltage Reference DS009061-17 10A Regulator 8 DS009061-3 DS009061-18 ...

Page 9

Typical Applications (Continued) 5V Logic Regulator with Electronic Shutdown * *Min output 1.2V 5A Constant Voltage/Constant Current Regulator † Solid tantalum *Lights in constant current mode 0 to 30V Regulator DS009061-19 Full output current not available at high input-output voltages ...

Page 10

Typical Applications (Continued) Adjustable Current Regulator Precision Current Limiter *0.4 R 120 1 www.national.com 12V Battery Charger 1.2V–20V Regulator with Minimum Program Current *Minimum output current 4 mA DS009061-23 3A Current Regulator DS009061-24 10 DS009061-22 DS009061-25 DS009061-26 ...

Page 11

Typical Applications (Continued) Adjusting Multiple On-Card Regulators † Minimum load — ± *All outputs within 100 mV AC Voltage Regulator Tracking Preregulator DS009061-27 with Single Control * Simple 12V Battery Charger Use of R allows low charging rates ...

Page 12

Typical Applications (Continued) Temperature Controller Light Controller www.national.com Adjustable 10A Regulator DS009061-11 Current Limited 6V Charger DS009061-12 *Sets peak current (2A for 0 *1000 µF is recommended to filter out any input transients. 12 DS009061-31 DS009061-32 6A Regulator ...

Page 13

Physical Dimensions inches (millimeters) unless otherwise noted Order Number LM150K STEEL or LM350K STEEL 2 Lead TO-3 Metal Can Package (K) NS Package Number K02A 2 Lead TO-3 Metal Can Package (K) Mil-Aero Product Order Number LM150K/883 NS Package Number ...

Page 14

... National Semiconductor Asia Pacific Customer Fax: +49 (0) 1 80-530 85 86 Response Group Email: europe.support@nsc.com Tel: 65-2544466 Fax: 65-2504466 Tel: +49 (0) 1 80-532 78 32 Email: sea.support@nsc.com Tel: +49 (0) 1 80-534 16 80 National Semiconductor Japan Ltd. Tel: 81-3-5639-7560 Fax: 81-3-5639-7507 ...

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