Datasheet > LM138_16

LM138_16

更新时间： 2024-02-27 09:16:34

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5-Amp Adjustable Regulators

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LM138_16 数据手册

LM138, LM338

www.ti.com

SNVS771B –MAY 1998–REVISED APRIL 2013

LM138/LM338 5-Amp Adjustable Regulators

Check for Samples: LM138, LM338

A unique feature of the LM138 family is time-

FEATURES

dependent current limiting. The current limit circuitry

allows peak currents of up to 12A to be drawn from

the regulator for short periods of time. This allows the

LM138 to be used with heavy transient loads and

speeds start-up under full-load conditions. Under

sustained loading conditions, the current limit

decreases to a safe value protecting the regulator.

Also included on the chip are thermal overload

protection and safe area protection for the power

transistor. Overload protection remains functional

even if the adjustment pin is accidentally

disconnected.

•

Specified 7A Peak Output Current

Specified 5A Output Current

Adjustable Output Down to 1.2V

Specified Thermal Regulation

Current Limit Constant with Temperature

P⁺Product Enhancement Tested

Output is Short-Circuit Protected

APPLICATIONS

•

Adjustable Power Supplies

Constant Current Regulators

Battery Chargers

Normally, no capacitors are needed unless the device

is situated 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 bypassing the adjustment

pin will increase the regulator's ripple rejection.

DESCRIPTION

The LM138 series of adjustable 3-terminal positive

voltage regulators is capable of supplying in excess

of 5A over a 1.2V to 32V output range. They are

exceptionally easy to use and require only 2 resistors

to set the output voltage. Careful circuit design has

Besides replacing fixed regulators or discrete

designs, the LM138 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., do not short-circuit output to ground.

The part numbers in the LM138 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 LM138 is rated for

−55°C ≤ T_J≤ +150°C, and the LM338 is rated for 0°C

≤ T_J≤ +125°C.

resulted

outstanding

load

and

line

regulation—comparable to many commercial power

supplies. The LM138 family is supplied in a standard

3-lead transistor package.

Connection Diagram

Connection Diagrams

Figure 1. (TO-3) Metal Can Package

Bottom View

See Package Number NDS0002A

Figure 2. (TO-220) Plastic Package

Front View

See Package Number NDE0003B

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...23

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与LM138_16相关器件

型号	品牌	获取价格	描述	数据表
LM138-238-338	ETC	获取价格
LM138AK	ETC	获取价格	Voltage Regulator
LM138AK-883B	ETC	获取价格	Voltage Regulator
LM138AK-STEEL/883	TI	获取价格	IC,VOLT REGULATOR,ADJUSTABLE,+1.2 TO +32V,BIPOLAR,TO-204/-3,3PIN,METAL
LM138K	STMICROELECTRONICS	获取价格	THREE-TERMINAL 5 A ADJUSTABLE VOLTAGE REGULATORS
LM138K	NSC	获取价格	5-Amp Adjustable Regulators
LM138K	Linear	获取价格	5A Positive Adjustable Voltage Regulator
LM138K STEEL	TI	获取价格	采用气密封装的 5A 可调输出线性稳压器/LDO \| NDS \| 2 \| -55 to 1
LM138K STEEL/NOPB	TI	获取价格	采用气密封装的 5A 可调输出线性稳压器/LDO \| NDS \| 2 \| -55 to 1
LM138K/883	ETC	获取价格	Positive Adjustable Voltage Regulator

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