Datasheet > LM238K

LM238K

更新时间： 2024-09-25 22:47:07

品牌	Logo	应用领域
意法半导体 - STMICROELECTRONICS		稳压器
页数	文件大小	规格书
12页	187K
描述
THREE-TERMINAL 5 A ADJUSTABLE VOLTAGE REGULATORS

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LM238K 技术参数

是否Rohs认证：	符合	生命周期：	Obsolete
零件包装代码：	TO-204AA	包装说明：	TO-3, TO-204/-3
针数：	2	Reach Compliance Code：	not_compliant
ECCN代码：	EAR99	HTS代码：	8542.39.00.01
风险等级：	5.81	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：	O-MBFM-P2
JESD-609代码：	e3	最大电网调整率 (%/V)：	0.04
最大负载调整率 (%)：	0.6%	功能数量：	1
输出次数：	1	端子数量：	2
工作温度TJ-Max：	150 °C	工作温度TJ-Min：	-25 °C
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：	METAL
封装代码：	TO-3	封装等效代码：	TO-204/-3
封装形状：	ROUND	封装形式：	FLANGE MOUNT
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：	NO
技术：	BIPOLAR	端子面层：	Tin (Sn)
端子形式：	PIN/PEG	端子位置：	BOTTOM
Base Number Matches：	1

LM238K 数据手册

LM138/238

LM338

THREE-TERMINAL 5-A

ADJUSTABLE VOLTAGE REGULATORS

GUARANTEED 7A PEAK OUTPUT CURRENT

GUARANTEED 5A OUTPUT CURRENT

ADJUSTABLE OUTPUT DOWN TO 1.2V

LINE REGULATION TYPICALLY 0.005% /V

LOAD REGULATION TYPICALLY 0.1%

GUARANTEED THERMAL REGULATION

CURRENT LIMIT CONSTANT WITH TEM-

PERATURE

STANDARD 3-LEAD TRANSISTOR PACKAGE

DESCRIPTION

The LM138/LM238/LM338 are adjustable 3-terminal

positive voltageregulators capable of supplying in ex-

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

exceptionally easy to use and require only 2 resistors

toset the output voltage. Careful circuitdesign has re-

sulted in outstanding load and line regulation com-

parable to many commercial power supplies. The

LM138 family is supplied in a standard 3-lead transis-

tor package.

TO3

K SUFFIX

(Steel Can)

ORDER CODE

A unique feature of the LM138 family is time-de-

pendent current limiting. The current limit circuitry

allowspeak currents of upto 12A tobe drawn fromthe

regulator for short periods of time. This allows the

LM138 to be used with heavy transient loads and

speedsstart-up under full-load conditions. Under sus-

tained 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 thepower transistor. Overloadpro-

tection remains functional even if the adjustment pin

is accidentally disconnected.

Normally, nocapacitors are needed unless thedevice

is situated far from the input filter capacitors in which

case an input bypass is needed. An optional output

capacitor can be added to improve transient res-

ponse. The adjustment terminal can be bypassed to

achieve very high ripple rejection ratios which are dif-

ficult to achieve with standard 3-terminal regulators.

Besidesreplacing fixedregulators ordiscretedesigns,

the LM238 is useful in a wide variety of other applica-

tions. Since the regulator is ”floating” and sees only

theinput-to-output differential voltage, supplies of sev-

eral hundred volts can be regulated as long as the

maximum input to input differential is not exceeded.

The LM138/LM238/LM338 are packaged in standard

steel TO-3 transistor packages. The LM138 is rated

for operation from -55 ^oC to 150 ^oC, the LM238 from

– 25°C to + 150°C and the LM338 from 0°C to +

125°C.

PART

NUMBER

TEMPERATURE

RANGE

PACKAGE

LM138

LM238

LM338

-55 C to + 150 C

•

-25 C to + 150 C

0 C to + 125 C

EXAMPLE: LM138K

PIN CONNECTION

(bottom view)

Case is output

March 1993

1/12

12 3 4 5 6 7...12

中文翻译

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与LM238K相关器件

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LM239	NXP	获取价格	Quad voltage comparator
LM239	STMICROELECTRONICS	获取价格	LOWPOWER QUAD VOLTAGE COMPARATORS
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LM239	UTC	获取价格	quad differential comparator
LM239	HGSEMI	获取价格	四路差分比较器
LM2396Z-5.0	TI	获取价格	5V FIXED POSITIVE LDO REGULATOR, 0.4V DROPOUT, PBCY3, PLASTIC, TO-92, 3 PIN
LM239A	NXP	获取价格	Quad voltage comparator
LM239A	STMICROELECTRONICS	获取价格	LOWPOWER QUAD VOLTAGE COMPARATORS
LM239A	TI	获取价格	QUAD DIFFERENTIAL COMPARATORS

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