Datasheet

ManualsBrandsST ManualsIntegrated Circuits (ICs)Linear Fixed Voltage Regulator, 9V, 500mA, DPAK

This is information on a product in full production.

June 2014 DocID2146 Rev 20 1/46

L78M

Precision 500 mA regulators

Datasheet

production data

Features

• Output current to 0.5 A

• Output voltages of 5; 6; 8; 9; 10; 12; 15; 24 V

• Thermal overload protection

• Short circuit protection

• Output transition SOA protection

• Output voltage tolerance: 2% (AB and AC

versions) or 4% (C version)

• Guaranteed in extended temperature range

Description

The L78M series of three-terminal positive

regulators is available in TO-220, TO-220FP,

DPAK and IPAK packages and with several fixed

output voltages, making it useful in a wide range

of applications. These regulators can provide

local on-card regulation, eliminating the

distribution problems associated with single point

regulation. Each type employs internal current

limiting, thermal shutdown and safe area

protection, resulting it essentially indestructible. If

adequate heat sinking is provided, they can

deliver over 0.5 A output current. Although

designed primarily as fixed voltage regulators,

these devices can be used with external

components to obtain adjustable voltage and

currents.

TO-220

DPAK

TO-220FP

IPAK

www.st.com

Summary of content (46 pages)

PAGE 1
L78M Precision 500 mA regulators Datasheet - production data Description TO-220 DPAK The L78M series of three-terminal positive regulators is available in TO-220, TO-220FP, DPAK and IPAK packages and with several fixed output voltages, making it useful in a wide range of applications. These regulators can provide local on-card regulation, eliminating the distribution problems associated with single point regulation.
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Contents L78M Contents 1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 Test circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 5 Electrical characteristics . . .
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L78M 1 Diagram Diagram Figure 1.
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Pin configuration 2 L78M Pin configuration Figure 2. Pin connections (top view) TO-220 TO220FP DPAK IPAK Figure 3.
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L78M 3 Maximum ratings Maximum ratings Table 1.
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Test circuits 4 L78M Test circuits Figure 5. DC parameter Figure 6. Load regulation Figure 7.
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L78M 5 Electrical characteristics Electrical characteristics Refer to the test circuits, TJ = 25 °C, VI = 10 V, IO = 350 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified. Table 3. Electrical characteristics of L78M05C Symbol Parameter VO Output voltage VO Output voltage ΔVO Line regulation ΔVO Load regulation Id ΔId ΔVO/ΔT Test conditions IO = 5 to 350 mA, VI = 7 to 20 V Typ. Max. Unit 4.8 5 5.2 V 4.75 5 5.
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Electrical characteristics L78M Refer to the test circuits, VI = 10 V, IO = 350 mA, CI = 0.33 µF, CO = 0.1 µF, TJ = -40 to 125 °C (AB), TJ = 0 to 125 °C (AC) unless otherwise specified. Table 4. Electrical characteristics of L78M05A Symbol Parameter Test conditions Min. Typ. Max. Unit VO Output voltage TJ = 25°C 4.9 5 5.1 V VO Output voltage IO = 5 to 350 mA, VI = 7 to 20 V 4.8 5 5.
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L78M Electrical characteristics Refer to the test circuits, TJ = 25 °C, VI = 11 V, IO = 350 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified. Table 5. Electrical characteristics of L78M06C Symbol Parameter VO Output voltage VO Output voltage ΔVO Line regulation ΔVO Load regulation Id ΔId ΔVO/ΔT Test conditions IO = 5 to 350 mA, VI = 8 to 21 V Typ. Max. Unit 5.75 6 6.25 V 5.7 6 6.
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Electrical characteristics L78M Refer to the test circuits, VI = 11 V, IO = 350 mA, CI = 0.33 µF, CO = 0.1 µF, TJ = -40 to 125 °C (AB), TJ = 0 to 125 °C (AC) unless otherwise specified. Table 6. Electrical characteristics of L78M06A Symbol Parameter Test conditions Min. Typ. Max. Unit VO Output voltage TJ = 25°C 5.88 6 6.12 V VO Output voltage IO = 5 to 350 mA, VI = 8 to 21 V 5.75 6 6.
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L78M Electrical characteristics Refer to the test circuits, TJ = 25 °C, VI = 14 V, IO = 350 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified. Table 7. Electrical characteristics of L78M08C Symbol Parameter VO Output voltage VO Output voltage ΔVO Line regulation ΔVO Load regulation Id ΔId ΔVO/ΔT Test conditions IO = 5 to 350 mA, VI = 10.5 to 23 V Typ. Max. Unit 7.7 8 8.3 V 7.6 8 8.4 V VI = 10.
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Electrical characteristics L78M Refer to the test circuits, VI = 14 V, IO = 350 mA, CI = 0.33 µF, CO = 0.1 µF, TJ = -40 to 125 °C (AB), TJ = 0 to 125 °C (AC) unless otherwise specified. Table 8. Electrical characteristics of L78M08A Symbol Parameter Test conditions Min. Typ. Max. Unit VO Output voltage TJ = 25°C 7.84 8 8.16 V VO Output voltage IO = 5 to 350 mA, VI = 10.5 to 23 V 7.7 8 8.3 V ΔVO VI = 10.
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L78M Electrical characteristics Refer to the test circuits, TJ = 25 °C, VI = 15 V, IO = 350 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified. Table 9. Electrical characteristics of L78M09C Symbol Parameter VO Output voltage VO Output voltage ΔVO Line regulation ΔVO Load regulation Id ΔId ΔVO/ΔT Test conditions IO = 5 to 350 mA, VI = 11.5 to 24 V Typ. Max. Unit 8.65 9 9.35 V 8.55 9 9.45 V VI = 11.
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Electrical characteristics L78M Refer to the test circuits, VI = 15 V, IO = 350 mA, CI = 0.33 µF, CO = 0.1 µF, TJ = -40 to 125 °C (AB), TJ = 0 to 125 °C (AC) unless otherwise specified. Table 10. Electrical characteristics of L78M09A Symbol Parameter Test conditions Min. Typ. Max. Unit VO Output voltage TJ = 25°C 8.82 9 9.18 V VO Output voltage IO = 5 to 350 mA, VI = 11.5 to 24 V 8.64 9 9.36 V ΔVO VI = 11.
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L78M Electrical characteristics Refer to the test circuits, VI = 16 V, IO = 350 mA, CI = 0.33 µF, CO = 0.1 µF, TJ = -40 to 125 °C (AB), TJ = 0 to 125 °C (AC) unless otherwise specified. Table 11. Electrical characteristics of L78M10A Symbol Parameter Test conditions Min. Typ. Max. Unit VO Output voltage TJ = 25°C 9.8 10 10.2 V VO Output voltage IO = 5 to 350 mA, VI = 12.5 to 25 V 9.6 10 10.4 V ΔVO VI = 12.
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Electrical characteristics L78M Refer to the test circuits, TJ = 25 °C, VI = 19 V, IO = 350 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified. Table 12. Electrical characteristics of L78M12C Symbol Parameter VO Output voltage VO Output voltage ΔVO Line regulation ΔVO Load regulation Id ΔId ΔVO/ΔT Test conditions IO = 5 to 350 mA, VI = 14.5 to 27 V Max. Unit 11.5 12 12.5 V 11.4 12 12.
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L78M Electrical characteristics Refer to the test circuits, VI = 19 V, IO = 350 mA, CI = 0.33 µF, CO = 0.1 µF, TJ = -40 to 125 °C (AB), TJ = 0 to 125 °C (AC) unless otherwise specified. Table 13. Electrical characteristics of L78M12A Symbol Parameter Test conditions Min. Typ. Max. Unit VO Output voltage TJ = 25°C 11.75 12 12.25 V VO Output voltage IO = 5 to 350 mA, VI = 14.5 to 27 V 11.5 12 12.5 V ΔVO VI = 14.
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Electrical characteristics L78M Refer to the test circuits, TJ = 25 °C, VI = 23 V, IO = 350 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified. Table 14. Electrical characteristics of L78M15C Symbol Parameter VO Output voltage VO Output voltage ΔVO Line regulation ΔVO Load regulation Id ΔId ΔVO/ΔT Test conditions IO = 5 to 350 mA, VI = 17.5 to 30 V Max. Unit 14.4 15 15.6 V 14.25 15 15.
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L78M Electrical characteristics Refer to the test circuits, VI = 23 V, IO = 350 mA, CI = 0.33 µF, CO = 0.1 µF, TJ = -40 to 125 °C (AB), TJ = 0 to 125 °C (AC) unless otherwise specified. Table 15. Electrical characteristics of L78M15A Symbol Parameter Test conditions Min. Typ. Max. Unit VO Output voltage TJ = 25°C 14.7 15 15.3 V VO Output voltage IO = 5 to 350 mA, VI = 17.5 to 30 V 14.4 15 15.6 V ΔVO VI = 17.
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Electrical characteristics L78M Refer to the test circuits, TJ = 25 °C, VI = 33 V, IO = 350 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified. Table 16. Electrical characteristics of L78M24C Symbol Parameter VO Output voltage VO Output voltage ΔVO Line regulation ΔVO Load regulation Id ΔId ΔVO/ΔT Test conditions IO = 5 to 350 mA, VI = 27 to 38 V Max. Unit 23 24 25 V 22.8 24 25.
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L78M Electrical characteristics Refer to the test circuits, VI = 33 V, IO = 350 mA, CI = 0.33 µF, CO = 0.1 µF, TJ = -40 to 125 °C (AB), TJ = 0 to 125 °C (AC) unless otherwise specified. Table 17. Electrical characteristics of L78M24A Symbol Parameter Test conditions VO Output voltage TJ = 25°C VO Output voltage IO = 5 to 350 mA, VI = 27 to 38 V ΔVO Line regulation ΔVO Load regulation Id ΔId ΔVO/ΔT Quiescent current Quiescent current change Typ. Max. Unit 23.5 24 24.
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Typical performance 6 L78M Typical performance Figure 8. Dropout voltage vs. junction temp. Figure 9. Dropout characteristics Figure 10. Peak output current vs. input-output differential voltage Figure 11. Output voltage vs.
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L78M Typical performance Figure 12. Supply voltage rejection vs. frequency Figure 13. Quiescent current vs. junction temperature Figure 14. Load transient response Figure 15. Line transient response Figure 16. Quiescent current vs.
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Applications information L78M 7 Applications information 7.1 Design considerations The L78M series of fixed voltage regulators are designed with thermal overload protection that shuts down the circuit when subjected to an excessive power overload condition, internal short-circuit protection that limits the maximum current the circuit will pass, and output transistor safe-area compensation that reduces the output short-circuit as the voltage across the pass transistor is increased.
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L78M Applications information Figure 18. Constant current regulator ,2 9;; 5 ,G Figure 19. Circuit for increasing output voltage ,5 t ,G 92 9;; 5 5 ,G5 Figure 20.
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Applications information L78M Figure 21. 0.5 to 10 V regulator 92 9;;5 5 Figure 22. High current voltage regulator 9%(4 5 BBBBBBBBBBBBBB ,5(4 ,4 E4 9%(4 ,2 ,5(* 4 ,5(* BBBBB B 5 Figure 23.
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L78M Applications information Figure 24. Tracking voltage regulator Figure 25. High input voltage circuit 9,1 9, 9= 9%( Figure 26.
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Applications information L78M Figure 27. Power AM modulator (unity voltage gain, IO ≤ 0.5) Note: The circuit performs well up to 100 kHz. Figure 28. Adjustable output voltage with temperature compensation 92 9;; 5 5 9%( Note: 28/46 Q2 is connected as a diode in order to compensate the variation of the Q1 VBE with the temperature. C allows a slow rise time of the VO.
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L78M 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. Figure 29.
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Package mechanical data L78M Table 18. TO-220 (single gauge) mechanical data mm Dim. Min. 30/46 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.
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L78M Package mechanical data Figure 30. TO-220 (dual gauge) drawing BW\SH$B5HYB7 DocID2146 Rev 20 31/46 46
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Package mechanical data L78M Table 19. TO-220 (dual gauge) mechanical data mm Dim. Min. Typ. 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 D1 32/46 Max. 1.27 E 10 10.40 e 2.40 2.70 e1 4.95 5.15 F 1.23 1.32 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.
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L78M Package mechanical data Figure 31.
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Package mechanical data L78M Table 20. TO-220FP mechanical data mm Dim. Min. Typ. A 4.4 4.6 B 2.5 2.7 D 2.5 2.75 E 0.45 0.7 F 0.75 1 F1 1.15 1.70 F2 1.15 1.70 G 4.95 5.2 G1 2.4 2.7 H 10 10.4 L2 34/46 Max. 16 L3 28.6 30.6 L4 9.8 10.6 L5 2.9 3.6 L6 15.9 16.4 L7 9 9.3 Dia 3 3.
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L78M Package mechanical data Figure 32.
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Package mechanical data L78M Table 21. DPAK mechanical data mm Dim. Min. Typ. 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 36/46 Max. 0.
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L78M Package mechanical data Figure 33. DPAK footprint (a) )3 B3 a.
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Package mechanical data L78M Figure 34.
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L78M Package mechanical data Table 22. DPAK (TO-252) type F mechanical data mm Dim. Min. Typ. Max. A 2.18 2.40 A1 0.90 1.10 A2 0.03 0.23 b 0.64 0.90 b4 4.95 5.46 c 0.46 0.61 c2 0.46 0.60 D 5.97 6.22 E 6.35 6.73 e1 4.40 4.70 H 9.35 10.34 L 1.00 1.78 L2 1.27 L4 0.60 1.
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Package mechanical data L78M Figure 35.
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L78M Package mechanical data Table 23. IPAK mechanical data mm. DIM min. typ. max. A 2.20 2.40 A1 0.90 1.10 b 0.64 0.90 b2 b4 0.95 5.20 B5 5.40 0.30 c 0.45 0.60 c2 0.48 0.60 D 6.00 6.20 E 6.40 6.60 e e1 2.28 4.40 H 4.60 16.10 L 9.00 9.40 L1 0.80 1.20 L2 0.80 V1 10° DocID2146 Rev 20 1.
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Packaging mechanical data 9 L78M Packaging mechanical data Figure 36. Tape for DPAK and D2PAK 10 pitches cumulative tolerance on tape +/- 0.2 mm T P0 Top cover tape P2 D E F B1 K0 For machine ref.
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L78M Packaging mechanical data Figure 37. Reel for DPAK and D2PAK T REEL DIMENSIONS 40mm min. Access hole At sl ot 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 24. DPAK and D2PAK 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 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.
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Order codes 10 L78M Order codes Table 25.
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L78M Revision history 11 Revision history Table 26. Document revision history Date Revision 21-Jun-2004 6 Document updating. 30-Aug-2006 7 Order codes updated. 29-Nov-2006 8 DPAK mechanical data updated and add footprint data. 06-Jun-2007 9 Order codes updated. 10-Dec-2007 10 Added Table 25. 19-Feb-2008 11 Modified: Table 25 on page 44. 15-Jul-2008 12 Modified: Table 25 on page 44 and Table 26 on page 45. 07-Apr-2009 13 Modified: Figure 9 on page 22 and Figure 15 on page 23.
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L78M Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale.