音影先锋亚洲天堂网|电影世界尽头的爱完整版播放|国产 熟女 91|高清无码免费观看欧美日韩|韩国一区二区三区黄色录像|美女亚洲加勒比在线|亚洲综合网 开心五月|7x成人在线入口|成人网站免费日韩毛片区|国产黄片?一级?二级?三级

LM138K Datasheet

  • LM138K

  • 5-Amp Adjustable Regulators

  • 16頁(yè)

  • NSC

掃碼查看芯片數(shù)據(jù)手冊(cè)

上傳產(chǎn)品規(guī)格書

PDF預(yù)覽

LM138/LM338 5-Amp Adjustable Regulators
May 1998
LM138/LM338
5-Amp Adjustable Regulators
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 鈥?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.
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鈥檚 ripple re-
jection.
Besides replacing fixed regulators or discrete designs, the
LM138 is useful in a wide variety of other applications. Since
the regulator is 鈥渇loating鈥?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 鈭?5藲C
鈮?/div>
T
J
鈮?/div>
+150藲C, and the LM338
is rated for 0藲C
鈮?/div>
T
J
鈮?/div>
+125藲C.
Features
n
n
n
n
n
n
n
Guaranteed 7A peak output current
Guaranteed 5A output current
Adjustable output down to 1.2V
Guaranteed thermal regulation
Current limit constant with temperature
P
+
Product Enhancement tested
Output is short-circuit protected
Applications
n
Adjustable power supplies
n
Constant current regulators
n
Battery chargers
Connection Diagrams
(See Physical Dimension section for further information)
(TO-220)
Plastic Package
(TO-3 STEEL)
Metal Can 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
漏 1999 National Semiconductor Corporation
DS009060
www.national.com

LM138K 產(chǎn)品屬性

  • LM138 View All Specifications

  • 100

  • 集成電路 (IC)

  • PMIC - 穩(wěn)壓器 - 線性

  • -

  • 正，可調(diào)式

  • 1.2 V ~ 32 V

  • -

  • -

  • 1

  • 5A

  • -55°C ~ 150°C

  • 通孔

  • TO-204AA，TO-3

  • TO-3

  • 托盤

  • 497-6706LM138K-ND

LM138K相關(guān)型號(hào)PDF文件下載

  • 型號(hào)
    版本
    描述
    廠商
    下載
  • 英文版
    泰豐
  • 英文版
    Precision Voltage-to-Frequency Converters
    NSC
  • 英文版
    Seoul Semiconductor [RED LAMP LED]
    SEOUL
  • 英文版
    3-Ampere Adjustable Negative Regulators
    NSC
  • 英文版
    3-Ampere Adjustable Negative Regulators
  • 英文版
    THREE TERMINAL ADJUSTABLE CURRENT SOURCES
    STMICROELECTRONICS
  • 英文版
    3-Terminal Adjustable Current Sources
    NSC
  • 英文版
    Constant Current Source and Temperature Sensor
    LINER
  • 英文版
    3-Terminal Adjustable Current Sources
  • 英文版
    THREE TERMINAL ADJUSTABLE CURRENT SOURCES
    STMicro
  • 英文版
    PRECISION TEMPERATURE SENSORS
    STMICROELECTRONICS
  • 英文版
    Precision Temperature Sensors
    NSC
  • 英文版
    Precision Temperature Sensors
  • 英文版
    Precision Temperature Sensors
  • 英文版
    PRECISION TEMPERATURE SENSORS
    STMicro
  • 英文版
    National Semiconductor [2.5V REFERENCE DIODE]
    NSC
  • 英文版
    NEGATIVE VOLTAGE REGULATORS THREE-TERMINAL ADJUSTABLE
    STMICROELECTRONICS
  • 英文版
    3-Terminal Adjustable Negative Regulators
    NSC
  • 英文版
    1.5 AMP NEGATIVE ADJUSTABLE VOLTAGE REGULATOR
    SEME-LAB
  • 英文版
    3-Terminal Adjustable Negative Regulators

掃碼下載APP，
一鍵連接廣大的電子世界。

在線人工客服

買家服務(wù)：
賣家服務(wù)：
技術(shù)客服：

0571-85317607

網(wǎng)站技術(shù)支持

13606545031

客服在線時(shí)間周一至周五
9:00-17:30

關(guān)注官方微信號(hào)，
第一時(shí)間獲取資訊。

建議反饋

聯(lián)系人：

聯(lián)系方式：

按住滑塊，拖拽到最右邊
>>
感謝您向阿庫(kù)提出的寶貴意見，您的參與是維庫(kù)提升服務(wù)的動(dòng)力！意見一經(jīng)采納，將有感恩紅包奉上哦！