器件名称: LM317M
功能描述: 3-Terminal 0.5A Positive Adjustable Regulator
文件大小: 224.35KB 共8页
简 介:www.fairchildsemi.com
LM317M
3-Terminal 0.5A Positive Adjustable Regulator
Features
Output Current in Excess of 0.5A Output Adjustable Between 1.2V and 37V Internal Thermal Overload Protection Internal Short Circuit Current Limiting Output Transistor Safe Area Compensation Floating Operation for High Voltage Applications
Description
The LM317M is a 3-terminal adjustable positive voltage regulator capable of supplying in excess of 500mA over an output voltage range of 1.2V to 37V. This voltage regulator is exceptionally easy to use and requires only two external resistors to set the output voltage.
D-PAK
2
1 3
1. Adj 2. Output 3. Input TO-220
12 3
Internal Block Diagram
V in 3 Input
+
-
V olta ge Re fe re nce
P rote ction Circ uitry
R limit
2 1 V ad j
Vo
Output
Rev. 1.0.2
2002 Fairchild Semiconductor Corporation
LM317M
Absolute Maximum Ratings
Parameter Input-Output Voltage Differential Power Dissipation Thermal Resistance Junction-Air D-PAK (Note1,2) Operating JunctionTemperature Range Storage Temperature Range Symbol VI - V O PD RθJA Tj TSTG Value 40 Internally Limited 100 0 ~ +125 -65 ~ +125 Unit V W °C/W °C °C
Electrical Characteristics
(VI-VO = 5V, IO = 0.1A, 0°C ≤ TJ ≤ +125°C, PDMAX = 7.5W, unless otherwise specified) Parameter Line Regulation (Note3) Symbol Rline Conditions TA = +25°C, 3V ≤ VI VO ≤ 40V 3V ≤ VI VO ≤ 40V TA =+25°C, 10mA ≤ IO ≤ 0.5A VO ≤ 5V VO ≥ 5V 10mA ≤ IO ≤ 0.5A VO ≤ 5V VO ≥ 5V Adjustment Pin Current Adjustment Pin Current Chang……
