Datasheet > LM238

LM238

更新时间： 2024-11-19 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

阅读下载

中文翻译

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

LM238 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

下载PDF

与LM238相关器件

型号	品牌	获取价格	描述	数据表
LM238K	STMICROELECTRONICS	获取价格	THREE-TERMINAL 5 A ADJUSTABLE VOLTAGE REGULATORS
LM239	ONSEMI	获取价格	Single Supply Quad Comparators
LM239	NXP	获取价格	Quad voltage comparator
LM239	STMICROELECTRONICS	获取价格	LOWPOWER QUAD VOLTAGE COMPARATORS
LM239	TI	获取价格	QUAD DIFFERENTIAL COMPARATORS
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

与LM238相关文章

解析光耦仿真器：升级光耦合器技术的必要性
2024-11-18

24
英伟达新一代Blackwell GPU过热问题致交付延迟
2024-11-18

16
国产厂商思特威CMOS图像传感器芯片单月出货超1亿颗，技术创新引领行业发展
2024-11-14

48
台积电5nm和3nm产能利用率达100%，半导体行业景气度持续攀升
2024-11-14

46

产品中心

服务支持

精选活动

关于我们

帮助中心

LM238

LM238 数据手册

与LM238相关器件

与LM238相关文章

您还可以找

产品中心

服务支持

精选活动

关于我们

帮助中心

LM238

LM238 数据手册

与LM238相关器件

与LM238相关文章

您还可以找

您在本页遇到什么问题？