Datasheet > LM338MWC

LM338MWC

更新时间： 2024-11-11 19:55:03

品牌	Logo	应用领域
美国国家半导体 - NSC		输出元件调节器
页数	文件大小	规格书
16页	395K
描述
IC VREG 1.2 V-32 V ADJUSTABLE POSITIVE REGULATOR, UUC, WAFER, Adjustable Positive Single Output Standard Regulator

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LM338MWC 技术参数

是否Rohs认证：	符合	生命周期：	Transferred
包装说明：	DIE, WAFER	Reach Compliance Code：	compliant
ECCN代码：	EAR99	HTS代码：	8542.39.00.01
风险等级：	5.56	可调性：	ADJUSTABLE
标称回动电压 1：	3 V	最大差分输入-输出电压：	35 V
最小差分输入-输出电压：	3 V	JESD-30 代码：	X-XUUC-N
最大电网调整率 (%/V)：	0.06	最大负载调整率 (%)：	1%
湿度敏感等级：	1	功能数量：	1
输出次数：	1	工作温度TJ-Max：	125 °C
工作温度TJ-Min：		最大输出电流 1：	5 A
最大输出电压 1：	32 V	最小输出电压 1：	1.2 V
封装主体材料：	UNSPECIFIED	封装代码：	DIE
封装等效代码：	WAFER	封装形状：	UNSPECIFIED
封装形式：	UNCASED CHIP	峰值回流温度（摄氏度）：	260
认证状态：	Not Qualified	调节器类型：	ADJUSTABLE POSITIVE SINGLE OUTPUT STANDARD REGULATOR
子类别：	Other Regulators	表面贴装：	YES
技术：	BIPOLAR	端子形式：	NO LEAD
端子位置：	UPPER	处于峰值回流温度下的最长时间：	40
Base Number Matches：	1

LM338MWC 数据手册

May 1998

LM138/LM338

5-Amp Adjustable Regulators

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.

General 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 resulted in outstanding load and

line regulation — comparable to many commercial power

supplies. The LM138 family is supplied in a standard 3-lead

transistor package.

A unique feature of the LM138 family is time-dependent cur-

rent 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 tran-

sient loads and speeds start-up under full-load conditions.

Under sustained loading conditions, the current limit de-

creases to a safe value protecting the regulator. Also in-

cluded 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.

Features

n Guaranteed 7A peak output current

n Guaranteed 5A output current

n Adjustable output down to 1.2V

n Guaranteed thermal regulation

n Current limit constant with temperature

n P⁺Product Enhancement tested

n Output is short-circuit protected

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.

Applications

n Adjustable power supplies

n Constant current regulators

n Battery chargers

Connection Diagrams (See Physical Dimension section for further information)

(TO-3 STEEL)

Metal Can Package

(TO-220)

Plastic Package

DS009060-31

Front View

Order Number LM338T

See NS Package Number T03B

DS009060-30

Bottom View

Order Number LM138K STEEL or LM338K STEEL

See NS Package Number K02A

DS009060

www.national.com

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与LM338MWC相关器件

型号	品牌	获取价格	描述	数据表
LM338N-1	TI	获取价格	2.2W, 1 CHANNEL, AUDIO AMPLIFIER, PDIP14
LM338P	Linear	获取价格	5A Positive Adjustable Voltage Regulator
LM338P#PBF	Linear	获取价格	IC VREG 1.2 V-32 V ADJUSTABLE POSITIVE REGULATOR, PSFM3, LEAD FREE, PLASTIC, TO-247, TO-3P
LM338P#TR	Linear	获取价格	IC VREG 1.2 V-32 V ADJUSTABLE POSITIVE REGULATOR, PSFM3, PLASTIC, TO-247, TO-3P, 3 PIN, Ad
LM338P#TRPBF	Linear	获取价格	IC VREG 1.2 V-32 V ADJUSTABLE POSITIVE REGULATOR, PSFM3, LEAD FREE, PLASTIC, TO-247, TO-3P
LM338T	TI	获取价格	LM138/LM338 5-Amp Adjustable Regulators
LM338T	NSC	获取价格	5-Amp Adjustable Regulators
LM338T/NOPB	TI	获取价格	LM138/LM338 5-Amp Adjustable Regulators
LM338V	ETC	获取价格	Voltage Regulator
LM339	UTC	获取价格	QUAD DIFFERENTIAL COMPARATOR

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