Datasheet > LR8N3-GP005

LR8N3-GP005

更新时间： 2024-11-16 19:53:47

品牌	Logo	应用领域
美国微芯 - MICROCHIP		输出元件调节器
页数	文件大小	规格书
10页	918K
描述
1.2V-440V ADJUSTABLE POSITIVE REGULATOR, BCY3

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LR8N3-GP005 技术参数

是否Rohs认证：	符合	生命周期：	Active
包装说明：	TO-92,	Reach Compliance Code：	compliant
风险等级：	5.67	最大差分输入-输出电压：	450 V
最小差分输入-输出电压：	12 V	JESD-30 代码：	O-XBCY-T3
功能数量：	1	端子数量：	3
工作温度TJ-Max：	125 °C	工作温度TJ-Min：	-40 °C
最大输出电压 1：	440 V	最小输出电压 1：	1.2 V
封装主体材料：	UNSPECIFIED	封装代码：	TO-92
封装形状：	ROUND	封装形式：	CYLINDRICAL
峰值回流温度（摄氏度）：	NOT SPECIFIED	调节器类型：	ADJUSTABLE POSITIVE SINGLE OUTPUT STANDARD REGULATOR
表面贴装：	NO	端子形式：	THROUGH-HOLE
端子位置：	BOTTOM	处于峰值回流温度下的最长时间：	NOT SPECIFIED
Base Number Matches：	1

LR8N3-GP005 数据手册

Supertex inc.

LR8

High Input Voltage,

Adjustable 3-Terminal Linear Regulator

Features

General Description

► 13.2 - 450V input voltage range

► Adjustable 1.20 - 440V output regulation

► 5% output voltage tolerance

► Output current limiting

The Supertex LR8 is a high voltage, low output current, adjustable

linear regulator. It has a wide operating input voltage range of

13.2 - 450V. The output voltage can be adjusted from 1.20 - 440V

provided that the input voltage is at least 12V greater than the

output voltage. The output voltage can be adjusted by means of

two external resistors R1 and R2 as shown in the typical application

circuits. The LR8 regulates the voltage difference between VOUT

and ADJ pins to a nominal value of 1.20V. The 1.20V is ampliﬁed

by the external resistor ratio R1 and R2. An internal constant

bias current of typically 10µA is connected to the ADJ pin. This

increases V_OUTby a constant voltage of 10µA times R2.

► 10µA typical ADJ current

► Internal junction temperature limiting

Applications

► Off-line SMPS startup circuits

► Adjustable high voltage constant current source

► Industrial controls

► Motor controls

The LR8 has current limiting and temperature limiting. The output

current limit is typically 20mA and the minimum temperature limit

is 125°C. An output short circuit current will therefore be limited

to 20mA. When the junction temperature reaches its temperature

limit, the output current and/or output voltage will decrease to

keep the junction temperature from exceeding its temperature

limit. For SMPS start-up circuit applications, the LR8 turns off

when an external voltage greater than the output voltage of the

LR8 is applied to VOUT of the LR8. To maintain stability, a bypass

capacitor of 1.0µF or larger and a minimum DC output current of

500µA are required.

► Battery chargers

► Power supplies

The device is available in TO-243AA (SOT-89), TO-252 (D-PAK),

and TO-92 packages.

Typical Application Circuit

V_OUT

VIN

VOUT

V_IN

R₁

ADJ

C₁

C₂

LR8

R_LOAD

R₂

* Required for conditions where V_INis less than V_OUT

Doc.# DSFP-LR8

B080113

Supertex inc.

www.supertex.com

12 3 4 5 6 7...10

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