LR8N3-G-P003

厂商：
ACTEL(微芯科技)
封装：
TO-92-3
描述：
LR8 is a high voltage, low output current, adjustable linear regulator. It has a wide operating inpu...

数据手册：

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数据手册
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LR8N3-G-P003 数据手册

LR8 High-Input Voltage, Adjustable, 3-Terminal, Linear Regulator Features General Description • • • • • • LR8 is a high-voltage, low-output current, adjustable linear regulator. This regulator has a wide operating input voltage range of 13.2-450V. The output voltage can be adjusted from 1.20-438V, 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. 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 10 µA, is connected to the ADJ pin. This increases VOUT by a constant voltage of 10 µA times R2. 13.2-450V Input Voltage Range Adjustable 1.20-438V Output Regulation 5% Output Voltage Tolerance Output Current Limiting 10 µA Typical ADJ Current Internal Junction Temperature Limiting Applications • • • • • • Offline SMPS startup circuits Adjustable high-voltage constant current source Industrial controls Motor controls Battery chargers Power supplies LR8 provides both current and temperature limiting. The output current limit is typically 20 mA and the minimum temperature limit is +125°C. An output shortcircuit current will therefore be limited to 20 mA. When the junction temperature reaches its temperature limit, the output current and/or output voltage will decrease to prevent the junction temperature from exceeding its temperature limit. For SMPS start-up circuit applications, 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 1.0 µF or larger and a minimum DC output current of 500 µA are required. LR8 is available in TO-243AA (SOT-89), TO-252 (DPAK) and TO-92 packages.  2015-2017 Microchip Technology Inc. DS20005399B-page 1 LR8 Package Type VOUT ADJ ADJ 9,1 VOUT VIN 9287 TO-243AA (SOT-89) TO-92 VOUT ADJ VIN TO-252 See Table 2-1 for pin information Functional Block Diagram VIN Pass Element Overtemp & Overcurrent LR8 DS20005399B-page 2 VOUT 1.2V 10μA ADJ  2015-2017 Microchip Technology Inc. LR8 1.0 ELECTRICAL CHARACTERISTICS ABSOLUTE MAXIMUM RATINGS† VIN Input voltage (voltages ref to ADJ).............................................................................................................................. -0.5 to +480V Output voltage range.......................................................................................................................................................... 0.5 to +470V Operating ambient temperature range ...........................................................................................................................–40°C to +85°C Operating junction temperature range .........................................................................................................................–40°C to +125°C Storage temperature ....................................................................................................................................................–65°C to +150°C † Notice: Stresses above those listed under “Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at those or any other conditions above those indicated in the operational listings of this specification is not implied. Exposure to maximum rating conditions for extended periods may affect device reliability.  2015-2017 Microchip Technology Inc. DS20005399B-page 3 LR8 ELECTRICAL CHARACTERISTICS 1 Parameter Sym. Min. Input to output voltage difference VIN- VOUT 12 Overall output voltage regulation VOUT Minimum output current Adjust output current IOUT IADJ Minimum output load capacitance Ripple rejection ratio Junction temperature limit 1 CLOAD ∆VOUT/∆VIN TLIMIT V 1.26 V 375 400 425 V 0.003 0.01 %/V 1.4 3.0 % -1 +1 % 10 0.3 30 0.5 0.5 mA mA mA 10 15 µA µF dB °C Temperature regulation IOUT Units Conditions 450 1.20 ∆VOUT Output current limit Max. 1.14 Line regulation Load regulation Typ. 5.0 1.0 50 125 60 13.2V < VIN < 400V, R1 = 2.4 kΩ, R2 = 0 R1 = 2.4 kΩ, R2 = 782 kΩ 17V < VIN < 400V, VOUT = 5V, IOUT = 0.5mA VIN = 17V, VOUT = 5V, 0.5 mA < IOUT < 10 mA VIN = 17V, VOUT = 5V, IOUT = 10 mA, -40°C < TA < 85°C TJ < 85°C, VIN - VOUT = 12V TJ > 125°C, VIN - VOUT = 450V Includes R1 and load current 120 Hz, VOUT = 5V Test Conditions unless otherwise specified: -40°C

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LR8N3-G-P003

物料型号：LR8

器件简介：LR8是一款高输入电压、低输出电流的可调线性调节器。它具有13.2-450V的宽输入电压范围，并且输出电压可以在1.20-438V之间调节。

引脚分配： - VIN：调节器输入，接受13.2-450V的电压。 - VOUT：调节器输出。 - ADJ：输出电压调节。

参数特性： - 输入到输出电压差：至少12V。 - 整体输出电压调节：在特定条件下，典型值为1.20V。 - 线路调节：在17V至400V输入电压下，输出电压为5V时，典型值为0.003%/V至0.01%/V。 - 负载调节：在17V输入电压和5V输出电压下，负载电流在0.5mA至10mA变化时，为1.4%至3.0%。 - 温度调节：在40°C至85°C环境温度下，为+1%至-1%。 - 输出电流限制：在85°C以下时，为10mA至30mA。

功能详解： - LR8提供电流和温度限制功能。输出短路电流通常限制在20mA，当结温达到其温度限制时，输出电流和/或输出电压将降低，以防止结温超过其温度限制。 - 对于SMPS启动电路应用，当LR8的VOUT上施加的外部电压大于LR8的输出电压时，LR8将关闭。

应用信息： - 适用于离线SMPS启动电路、可调高压恒流源、工业控制、电机控制、电池充电器和电源供应。

封装信息： - LR8提供TO-243AA (SOT-89)、TO-252 (DPAK) 和 TO-92封装。

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