Datasheet

ManualsBrandsST ManualsIntegrated Circuits (ICs)Linear Fixed Voltage Regulator, 12V, 1.5A, TO-220

July 2008 Rev 17 1/26

L78xxAB

L78xxAC

Precision 1 A regulators

Features

■ Output current in excess of 1 A

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

■ Thermal overload protection

■ Output transition SOA protection

■ 2 % Output voltage tolerance

■ Guaranteed in extended temperature range

Description

The L78xxAB L78xxAC series of three terminal

positive regulators are available in TO-220,

TO-220FP, and D

PAK packages and several

fixed output voltages, making it useful in a wide

range of applications. These regulators can

provide local on-card regulation, eliminating the

distribution problem associated with single point

regulation. Each type employs internal current

limiting, thermal shut-down and safe area

protection, making it essentially indestructible. If

adequate heat sinking is provided, they can

deliver over 1 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-220FP

PAK

TO-220

Table 1. Device summary

Order codes

L7805AB L7809AC

L7805AC L7812AB

L7806AB L7812AC

L7806AC L7815AB

L7808AB L7815AC

L7808AC L7824AB

L7809AB L7824AC

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Summary of content (26 pages)

PAGE 1
L78xxAB L78xxAC Precision 1 A regulators Features ■ Output current in excess of 1 A ■ Output voltages of 5; 6; 8; 9; 12; 15; 24 V ■ Thermal overload protection ■ Output transition SOA protection ■ 2 % Output voltage tolerance ■ Guaranteed in extended temperature range TO-220 TO-220FP Description The L78xxAB L78xxAC series of three terminal positive regulators are available in TO-220, TO-220FP, and D2PAK packages and several fixed output voltages, making it useful in a wide range of application
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Contents L78xxAB - L78xxAC Contents 1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 Test circuits 5 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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L78xxAB - L78xxAC 1 Diagram Figure 1. Block diagram Figure 2.
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Pin configuration L78xxAB - L78xxAC 2 Pin configuration Figure 3.
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L78xxAB - L78xxAC Maximum ratings 3 Maximum ratings Table 2.
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Test circuits 4 Test circuits Figure 5. DC parameter Figure 6. Load regulation Figure 7.
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L78xxAB - L78xxAC Electrical characteristics 5 Electrical characteristics Table 4. Electrical characteristics of L7805A (VI = 10 V, IO = 1 A, TJ = 0 to 150 °C (L7805AC), TJ = -40 to 125 °C (L7805AB), unless otherwise specified) Symbol Parameter Test conditions Min. Typ. Max. Unit VO Output voltage TJ = 25°C 4.9 5 5.1 V VO Output voltage IO = 5mA to 1A, PO ≤15W VI = 7.5 to 20V 4.8 5 5.2 V VI = 7.
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Electrical characteristics Table 5. Symbol L78xxAB - L78xxAC Electrical characteristics of L7806A (VI = 11 V, IO = 1 A, TJ = 0 to 150 °C (L7806AC), TJ = -40 to 125 °C (L7806AB), unless otherwise specified) Parameter Test conditions Min. Typ. Max. Unit VO Output voltage TJ = 25°C 5.88 6 6.12 V VO Output voltage IO = 5mA to 1A, PO ≤15W VI = 8.6 to 21V 5.76 6 6.24 V VI = 8.6 to 25V, IO = 500 mA 9 60 mV VI = 9 to 13V 11 60 mV VI = 9 to 13V, TJ = 25°C 3 30 mV VI = 8.
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L78xxAB - L78xxAC Table 6. Symbol Electrical characteristics Electrical characteristics of L7808A (VI = 14 V, IO = 1 A, TJ = 0 to 150 °C (L7808AC), TJ = -40 to 125 °C (L7808AB), unless otherwise specified) Parameter Test conditions Min. Typ. Max. Unit VO Output voltage TJ = 25°C 7.84 8 8.16 V VO Output voltage IO = 5mA to 1A, PO ≤15W VI = 10.6 to 23V 7.7 8 8.3 V VI = 10.6 to 25V, IO = 500 mA 12 80 mV VI = 11 to 17V 15 80 mV VI = 11 to 17V, TJ = 25°C 5 40 mV VI = 10.
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Electrical characteristics Table 7. Symbol L78xxAB - L78xxAC Electrical characteristics of L7809A (VI = 15 V, IO = 1 A, TJ = 0 to 150 °C (L7809AC), TJ = -40 to 125 °C (L7809AB), unless otherwise specified) Parameter Test conditions Min. Typ. Max. Unit VO Output voltage TJ = 25°C 8.82 9 9.18 V VO Output voltage IO = 5mA to 1A, PO ≤15W VI = 10.6 to 23V 8.65 9 9.35 V VI = 10.6 to 25V, IO = 500 mA 12 90 mV VI = 11 to 17V 15 90 mV VI = 11 to 17V, TJ = 25°C 5 45 mV VI = 10.
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L78xxAB - L78xxAC Table 8. Symbol Electrical characteristics Electrical characteristics of L7812A (VI = 19 V, IO = 1 A, TJ = 0 to 150 °C (L7812AC), TJ = -40 to 125 °C (L7812AB), unless otherwise specified) Parameter Test conditions Min. Typ. Max. Unit VO Output voltage TJ = 25°C 11.75 12 12.25 V VO Output voltage IO = 5mA to 1A, PO ≤15W VI = 14.8 to 27V 11.5 12 12.5 V VI = 14.
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Electrical characteristics Table 9. Symbol L78xxAB - L78xxAC Electrical characteristics of L7815A (VI = 23 V, IO = 1 A, TJ = 0 to 150 °C (L7815AC), TJ = -40 to 125 °C (L7815AB), unless otherwise specified) Parameter Test conditions Min. Typ. Max. Unit VO Output voltage TJ = 25°C 14.7 15 15.3 V VO Output voltage IO = 5mA to 1A, PO ≤15W VI = 17.9 to 30V 14.4 15 15.6 V VI = 17.9 to 30V, IO = 500 mA 13 150 mV VI = 20 to 26V 16 150 mV VI = 20 to 26V, TJ = 25°C 6 75 mV VI = 17.
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L78xxAB - L78xxAC Table 10. Symbol Electrical characteristics Electrical characteristics of L7824A (VI = 33 V, IO = 1 A, TJ = 0 to 150 °C (L7824AC), TJ = -40 to 125 °C (L7824AB), unless otherwise specified) Parameter Test conditions Min. Typ. Max. Unit 23.5 24 24.5 V 23 24 25 V VI = 27 to 38V, IO = 500 mA 31 240 mV VI = 30 to 36V 35 200 mV VI = 30 to 36V, TJ = 25°C 14 120 mV VI = 26.7 to 38V, TJ = 25°C 31 240 mV IO = 5mA to 1A 25 100 mV IO = 5mA to 1.
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Application information 6 Application information 6.1 Design consideration L78xxAB - L78xxAC The L78xxA 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 current as the voltage across the pass transistor is increased.
PAGE 15
L78xxAB - L78xxAC Figure 9. Application information DC parameter VO = 7 to 20V VI - VO ≥ 2V Figure 10. DC parameter VBEQ1 R1 = ______________ IREQ-(IQ1/βQ1) VBEQ1 IO = IREG + Q1 (IREG ______) R1 Figure 11.
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Package mechanical data 7 L78xxAB - L78xxAC Package mechanical data In order to meet environmental requirements, ST offers these devices in ECOPACK® packages. These packages have a lead-free second level interconnect. The category of second Level Interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an ST trademark.
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L78xxAB - L78xxAC Package mechanical data TO-220 mechanical data Dim. mm. Min. Typ. inch. Max. Min. Typ. Max. A 4.40 4.60 0.173 0.181 C 1.23 1.32 0.048 0.051 D 2.40 2.72 0.094 0.107 0.70 0.019 0.027 D1 E 1.27 0.49 0.050 F 0.61 0.88 0.024 0.034 F1 1.14 1.70 0.044 0.067 F2 1.14 1.70 0.044 0.067 G 4.95 5.15 0.194 0.203 G1 2.4 2.7 0.094 0.106 H2 10.0 10.40 0.393 0.409 L2 16.4 0.645 L4 13.0 14.0 0.511 0.551 L5 2.65 2.95 0.104 0.116 L6 15.
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Package mechanical data L78xxAB - L78xxAC TO-220FP mechanical data Dim. mm. Min. A 4.40 Typ inch. Max. Min. Typ. Max. 4.60 0.173 0.181 B 2.5 2.7 0.098 0.106 D 2.5 2.75 0.098 0.108 E 0.45 0.70 0.017 0.027 F 0.75 1 0.030 0.039 F1 1.15 1.50 0.045 0.059 F2 1.15 1.50 0.045 0.059 G 4.95 5.2 0.194 0.204 G1 2.4 2.7 0.094 0.106 H 10.0 10.40 0.393 0.409 L2 L3 16 0.630 28.6 30.6 1.126 1.204 L4 9.8 10.6 0.385 0.417 L5 2.9 3.6 0.114 0.
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L78xxAB - L78xxAC Package mechanical data Figure 12.
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Package mechanical data L78xxAB - L78xxAC Figure 13. Drawing dimension D2PAK (type WOOSEOK-Subcon.
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L78xxAB - L78xxAC Table 11. Package mechanical data D2PAK mechanical data Dim. Min. Type WOOSEOK-Subcon. mm. mm. Typ. Max. Min. Typ. Max. A 4.40 4.60 4.30 4.70 A1 0.03 0.23 0 0.20 b 0.70 0.93 0.70 0.90 b2 1.14 1.70 1.17 1.37 c 0.45 0.60 0.45 0.50 0.60 c2 1.23 1.36 1.25 1.30 1.40 D 8.95 9.35 9 9.20 9.40 D1 7.50 E 10 E1 8.50 e 7.50 10.40 9.80 10.20 7.50 2.54 2.54 e1 4.88 5.28 H 15 15.85 15 J1 2.49 2.69 2.20 2.60 L 2.29 2.79 1.79 2.
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Package mechanical data L78xxAB - L78xxAC Figure 14. D2PAK footprint recommended data Table 12. Footprint data Values 22/26 Dim. mm. inch. A 12.20 0.480 B 9.75 0.384 C 16.90 0.665 D 3.50 0.138 E 1.60 0.063 F 2.54 0.100 G 5.08 0.
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L78xxAB - L78xxAC Package mechanical data Tape & reel D2PAK-P2PAK-D2PAK/A-P2PAK/A mechanical data mm. inch. Dim. Min. Typ. A Max. Min. Typ. 180 13.0 7.086 C 12.8 D 20.2 0.795 N 60 2.362 T 13.2 Max. 0.504 0.512 14.4 0.519 0.567 Ao 10.50 10.6 10.70 0.413 0.417 0.421 Bo 15.70 15.80 15.90 0.618 0.622 0.626 Ko 4.80 4.90 5.00 0.189 0.193 0.197 Po 3.9 4.0 4.1 0.153 0.157 0.161 P 11.9 12.0 12.1 0.468 0.472 0.
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Order codes L78xxAB - L78xxAC 8 Order codes Table 13.
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L78xxAB - L78xxAC Revision history 9 Revision history Table 14. Document revision history Date Revision Changes 21-Jun-2004 9 Document updating. 04-Aug-2006 10 Order codes updated and new template. 19-Jan-2007 11 D2PAK mechanical data has been updated and add footprint data. 07-Mar-2007 12 Update figure D2PAK in cover page. 01-Jun-2007 13 Order codes updated. 25-Jul-2007 14 Add Table 1 in cover page. 11-Dec-2007 15 Modified: Table 13.
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L78xxAB - L78xxAC 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.