LM317M

Manufacturer Part NumberLM317M
DescriptionThe LM317M is a 3-terminal adjustable positive voltage regulator capable of supplying in excess of 500mA over an output voltage range of 1
ManufacturerFairchild Semiconductor
LM317M datasheet
 


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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
Internal Block Diagram
V in
3
Input
©2011 Fairchild Semiconductor Corporation
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
1. Adj 2. Output 3. Input
TO-220 (Single Gauge)
1
+
-
P rote ction
V olta ge
Circ uitry
Re fe re nce
1
V ad j
www.fairchildsemi.com
2
1
3
2
3
R lim it
2
V o
Output
Rev. 1.0.5

LM317M Summary of contents

  • Page 1

    ... Input ©2011 Fairchild Semiconductor Corporation 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. ...

  • Page 2

    ... LM317M Absolute Maximum Ratings Parameter Input-Output Voltage Differential Power Dissipation Thermal Resistance Junction-Case (TO-220) Thermal Resistance Junction-Air (TO-220) Thermal Resistance Junction-Air (D-PAK (Note1,2)) Operating Junction Temperature Range Storage Temperature Range Electrical Characteristics = 0.1A, 0°C ≤ 5V Parameter Line Regulation (Note3) ...

  • Page 3

    ... Typical Performance Characteristics Figure 1. Minimum Load Current Figure 3. Adjustment Pin Current vs. Temperature Figure 5. Load Regulation vs. Temperature Figure 2. Peak Output Current vs. Input-Output Differential Voltage Figure 4. Ripple Rejection vs. Frequency Figure 6. Line Regulation vs. Temperature LM317M 3 ...

  • Page 4

    ... LM317M Typical Performance Characteristics Figure 7. Outputvoltage vs. Temperature 4 (Continued) Figure 8. Thermal Shutdown ...

  • Page 5

    ... Input V ADJ D1 protects the device during an input short circuit. Input V ADJ Input LM317M V ADJ 5 D1 1N4002 V LM317M 720 KSP2222 MINIMUM V Figure Electronic Shutdown Regulator LM317M KSP2907 R2 Figure 2. Slow Turn-On Regulator ADJ V ⎛ ⎞ REF I ---------------- - ⎝ ⎠ OMAX ...

  • Page 6

    ... Mechanical Dimensions Package ±0.20 6.60 ±0.30 5.34 (0.50) (4.34) MAX0.96 2.30TYP [2.30±0.20] Dimensions in millimeters D-PAK (0.50) ±0.10 0.76 2.30TYP [2.30±0.20] ±0.20 6.60 (5.34) (5.04) (1.50) (2XR0.25) LM317M ±0.10 2.30 0.50 ±0.10 ±0.10 0.50 1.02 ±0.20 2.30 ±0.20 0.76 ±0.10 6 ...

  • Page 7

    ... Mechanical Dimensions Package TO-220 [ SINGLE GAUGE ] (Continued) Dimensions in millimeters LM317M 7 ...

  • Page 8

    ... LM317M Ordering Information Product Number LM317MDT LM317MT TO-220 (Single Gauge) DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS ...