LM217M, LM317M Medium current 1.2 to 37 V adjustable voltage regulator Datasheet - production data Description TO-220 The LM217M and LM317M are monolithic integrated circuits in TO-220 and DPAK packages used as positive adjustable voltage regulators. They are designed to supply until 500 mA of load current with an output voltage adjustable over a 1.2 to 37 V range.
Contents LM217M, LM317M Contents 1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 5 Typical performance . . . . . .
LM217M, LM317M 1 Diagram Diagram Figure 1.
Pin configuration 2 LM217M, LM317M Pin configuration Figure 2. Pin connections (top view) ,QSXW 2XWSXW $GMXVW 9RXW 72 4/22 9LQ 9RXW $GMXVW 9RXW '3$.
LM217M, LM317M 3 Maximum ratings Maximum ratings Table 2. Absolute maximum ratings Symbol VI-VO Parameter Input-to-output differential voltage PD Power dissipation TOP Operating junction temperature range (1) TSTG Storage temperature range Value Unit 40 V Internally limited mW LM217M -40 to 125 LM317M 0 to 125 °C -55 to 150 °C 1. Reboot is not guaranteed for TJ ≥ 85 °C. Table 3.
Electrical characteristics 4 LM217M, LM317M Electrical characteristics Refer to the test circuits, TJ = - 40 to 125 °C, VI - VO = 5 V, IO = 100 mA, PD ≤ 7.5 W, unless otherwise specified. Table 4.
LM217M, LM317M Electrical characteristics Refer to the test circuits, TJ = 0 to 125 °C, VI - VO = 5 V, IO = 100 mA, PD ≤ 7.5 W, unless otherwise specified. Table 5.
Typical performance 5 LM217M, LM317M Typical performance Figure 4. Current limit Figure 5. Minimum operating current Figure 6. Basic adjustable regulator ,Q 2XW $'- Figure 7. Thermal resistance and maximum power dissipation vs. PCB copper length for DPAK Note: 8/22 Pdmax calculated for Ta = 50 °C.
LM217M, LM317M 6 Application information Application information The LM217M and LM317M provide an internal reference voltage (1.25 V) between the output and adjustment terminals. These devices set a constant current flow across an external resistor divider (see Figure 6), giving the following output voltage: Equation 1 VO = VREF (1 + R2 / R1) + IADJ R2 These devices minimize the term IADJ (100 µA max.) and keep it constant with line and load changes. Usually, the error terms: IADJ × R2 can be neglected.
Application circuits 6.3 LM217M, LM317M Start-up block Reboot of the device is not guaranteed when the junction temperature is over 85 °C. 7 Application circuits Figure 8. Voltage regulator with protection diodes ,Q 2XW DGM Figure 9.
LM217M, LM317M Application circuits Figure 10. Current regulator 2XW ,Q DGM ,2 95() 5 ,$'- 9 5 Figure 11.
Application circuits LM217M, LM317M Figure 12.
LM217M, LM317M 8 Package mechanical data Package mechanical data In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK® packages, depending on their level of environmental compliance. ECOPACK® specifications, grade definitions and product status are available at: www.st.com. ECOPACK® is an ST trademark.
Package mechanical data 8.1 LM217M, LM317M TO-220 Figure 13.
LM217M, LM317M Package mechanical data Table 6. TO-220 mechanical data (type STD-ST single gauge) mm Dim. Min. Typ. Max. A 4.40 4.60 b 0.61 0.88 b1 1.14 1.70 c 0.48 0.70 D 15.25 15.75 E 10 10.40 e 2.40 2.70 e1 4.95 5.15 F 0.51 0.60 H1 6.20 6.60 J1 2.40 2.72 L 13 14 L1 3.50 3.93 L20 16.40 L30 28.90 ∅P 3.75 3.85 Q 2.65 2.
Package mechanical data 8.2 LM217M, LM317M DPAK Figure 14.
LM217M, LM317M Package mechanical data Table 7. DPAK mechanical data mm Dim. Min. Typ. Max. A 2.20 2.40 A1 0.90 1.10 A2 0.03 0.23 b 0.64 0.90 b4 5.20 5.40 c 0.45 0.60 c2 0.48 0.60 D 6.00 6.20 D1 E 5.10 6.40 6.60 E1 4.70 e 2.28 e1 4.40 4.60 H 9.35 10.10 L 1.00 1.50 (L1) 2.80 L2 0.80 L4 0.60 1.00 R V2 0.
Package mechanical data LM217M, LM317M Figure 15. DPAK footprint (a) Footprint_REV_K a. All dimensions are in millimeters.
LM217M, LM317M Packaging mechanical data 9 Packaging mechanical data 9.1 Tape and reel for DPAK Figure 16. Tape drawings 10 pitches cumulative tolerance on tape +/- 0.2 mm T P0 Top cover tape P2 D E F B1 K0 For machine ref.
Packaging mechanical data LM217M, LM317M Figure 17. Reel drawings T REEL DIMENSIONS 40 mm min. Access hole At slot location B D C N A Full radius G measured at hub Tape slot in core for tape start 25 mm min. width AM08851v2 Table 8. Tape and reel mechanical data Tape Reel mm mm Dim. Dim. Min. Max. A0 6.8 7 A B0 10.4 10.6 B 1.5 12.1 C 12.8 1.6 D 20.2 G 16.4 50 B1 20/22 Min. Max. 330 13.2 D 1.5 D1 1.5 E 1.65 1.85 N F 7.4 7.6 T K0 2.55 2.75 P0 3.9 4.
LM217M, LM317M 10 Revision history Revision history Table 9. Document revision history Date Revision 21-Jun-2004 5 The document has been reformatted. 06-Dec-2006 6 DPAK mechanical data updated, added footprint data. 11-Feb-2008 7 Added: Table 1 on page 1. 8 Updated Table 1: Device summary Updated Section 8.1: TO-220 and Section 8.2: DPAK. Updated Figure 3, Figure 6, Figure 8, Figure 9, Figure 10, Figure 11, Figure 12. Minor text changes.
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