l78m08ac STMicroelectronics, l78m08ac Datasheet

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l78m08ac

Manufacturer Part Number
l78m08ac
Description
Precision 500 Ma Regulators
Manufacturer
STMicroelectronics
Datasheet

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Features
Description
The L78MxxAB series of three-terminal positive
regulators is available in TO-220 and DPAK
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 shut-
down and safe area protection, making 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
Table 1.
February 2008
Output current to 0.5 A
Output voltages of 5; 6; 8; 9; 10; 12; 15; 18;
24 V
Thermal overload protection
Short circuit protection
Output transition SOA protection
± 2 % Output voltage tolerance
Guaranteed in extended temperature range
Device summary
L78M05AB
L78M05AC
L78M06AB
L78M08AB
L78M08AC
L78M09AB
Part number
Rev 6
with external components to obtain adjustable
voltage and currents.
Precision 500 mA regulators
TO-220
L78M10AB
L78M12AB
L78M12AC
L78M15AB
L78M24AB
L78M24AC
L78MxxAB
L78MxxAC
DPAK
www.st.com
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l78m08ac Summary of contents

Page 1

... A output current. Although designed primarily as fixed voltage regulators, these devices can be used Table 1. Device summary L78M05AB L78M05AC L78M06AB L78M08AB L78M08AC L78M09AB February 2008 Precision 500 mA regulators TO-220 with external components to obtain adjustable voltage and currents. Part number L78M10AB ...

Page 2

Contents 1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

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Diagram Figure 1. Block diagram 3/29 ...

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Pin configuration Figure 2. Pin connections (top view) TO-220 Figure 3. Schematic diagram 4/29 DPAK ...

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Maximum ratings Table 2. Absolute maximum ratings Symbol V DC input voltage I I Output current O P Power dissipation D T Storage temperature range STG T Operating junction temperature range OP Note: Absolute maximum ratings are those values ...

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Test circuits Figure 5. DC parameter Figure 6. Load regulation Figure 7. Ripple rejection 6/29 ...

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Electrical characteristics Table 4. Electrical characteristics of L78M05XX (refer to the test circuits 0.33 µ 0.1 µ specified) Symbol Parameter V Output voltage O V Output voltage O ΔV Line regulation ...

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Table 5. Electrical characteristics of L78M06XX (refer to the test circuits 0.33 µ 0.1 µ specified) Symbol Parameter V Output voltage O V Output voltage O ΔV Line regulation O ΔV Load ...

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Table 6. Electrical characteristics of L78M08XX (refer to the test circuits 0.33 µ 0.1 µ specified) Symbol Parameter V Output voltage O V Output voltage O ΔV Line regulation O ΔV Load ...

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Table 7. Electrical characteristics of L78M09XX (refer to the test circuits 0.33 µ 0.1 µ specified) Symbol Parameter V Output voltage O V Output voltage O ΔV Line regulation O ΔV Load ...

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Table 8. Electrical characteristics of L78M10XX (refer to the test circuits 0.33 µ 0.1 µ specified) Symbol Parameter V Output voltage O V Output voltage O ΔV Line regulation O ΔV Load ...

Page 12

Table 9. Electrical characteristics of L78M12XX (refer to the test circuits 0.33 µ 0.1 µ specified) Symbol Parameter V Output voltage O V Output voltage O ΔV Line regulation O ΔV Load ...

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Table 10. Electrical characteristics of L78M15XX (refer to the test circuits 0.33 µ 0.1 µ specified) Symbol Parameter V Output voltage O V Output voltage O ΔV Line regulation O ΔV Load ...

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Table 11. Electrical characteristics of L78M24XX (refer to the test circuits 0.33 µ 0.1 µ specified) Symbol Parameter V Output voltage O V Output voltage O ΔV Line regulation O ΔV Load ...

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Typical performance Figure 8. Dropout voltage vs junction temp. Figure 10. Peak output current vs input-output differential voltage Figure 12. Supply voltage rejection vs freq. Figure 9. Dropout characteristics Figure 11. Output voltage vs junction temperature Figure 13. Quiescent ...

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Figure 14. Load transient response Figure 16. Quiescent current vs input voltage 16/29 Figure 15. Line transient response ...

Page 17

Applications information 7.1 Design considerations The L78MxxAB 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 ...

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Figure 19. Current boost regulator V BEQ1 R = ______________ 1 I -(I /β ) REQ BEQ1 ______) O REG 1 REG R 1 Figure 20. Short-circuit protection Note: The circuit ...

Page 19

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 ...

Page 20

Dim. Min. A 4.40 C 1. 0.49 F 0.61 F1 1.14 F2 1.14 G 4.95 G1 2 13.0 L5 2.65 L6 15.25 L7 6.2 L9 3.5 DIA. 3.75 20/29 TO-220 mechanical data ...

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Figure 21. Drawing dimension DPAK type STD-ST 0068772/G 21/29 ...

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Figure 22. Drawing dimension DPAK type FUJITSU-Subcon. 22/29 0068772/G ...

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Figure 23. Drawing dimension DPAK TYPE IDS-Subcon. 0068772/G 23/29 ...

Page 24

Table 12. DPAK mechanical data Type STD-ST Dim. mm. Min. Typ. A 2.20 A1 0.90 A2 0.03 b 0.64 b4 5.20 c 0.45 c2 0.48 D 6.00 D1 5.10 E 6.40 E1 4.70 e 2.28 e1 4.40 H 9.35 L ...

Page 25

Figure 24. DPAK footprint recommended data Table 13. Footprint data Dim Values mm. 6.70 6.70 1.8 3.0 1.60 2.30 2.30 inch. 0.264 0.64 0.070 0.118 0.063 0.091 0.091 25/29 ...

Page 26

Tape & reel DPAK-PPAK mechanical data Dim. Min 12 6.80 Bo 10.40 Ko 2.55 Po 3.9 P 7.9 26/29 mm. Typ. Max. Min. 330 13.0 13.2 0.504 0.795 2.362 22.4 6.90 7.00 ...

Page 27

... L78M05AB L78M05AC L78M06AB L78M08AB L78M08AC L78M09AB L78M10AB L78M12AB L78M12AC L78M15AB L78M24AB L78M24AC Packaging TO-220 L78M05ABV L78M05ABDT-TR L78M05ACDT-TR L78M06ABDT-TR L78M08ABV L78M08ABDT-TR L78M08ACDT-TR L78M09ABV L78M09ABDT-TR L78M10ABDT-TR L78M12ABV L78M12ABDT-TR L78M12ACDT-TR L78M15ABV L78M15ABDT-TR L78M24ABV L78M24ABDT-TR L78M24ACDT-TR DPAK Output voltage ...

Page 28

Revision history Table 15. Document revision history Date Revision 30-Aug-2006 3 05-Oct-2006 4 10-Dec-2007 5 20-Feb-2008 6 28/29 Changes Order Codes updated. DPAK mechanical data updated and add footprint data. Modified: Table 14. Modified: Table 14 on page 27. ...

Page 29

... 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. ...

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