L78M12ABDT STMicroelectronics, L78M12ABDT Datasheet

V REG 0.5A +12V, SMD, 78M12, DPAK-3

L78M12ABDT

Manufacturer Part Number
L78M12ABDT
Description
V REG 0.5A +12V, SMD, 78M12, DPAK-3
Manufacturer
STMicroelectronics
Datasheets

Specifications of L78M12ABDT

Primary Input Voltage
19V
Output Voltage
12V
Dropout Voltage Vdo
2V
No. Of Pins
3
Output Current
500mA
Voltage Regulator Case Style
TO-252
Operating Temperature Range
-40°C To +125°C
Polarity
Positive
Number Of Outputs
1
Output Type
Fixed
Line Regulation
100 mV
Load Regulation
240 mV
Dropout Voltage (max)
2 V
Input Voltage Max
35 V
Maximum Operating Temperature
+ 125 C
Minimum Operating Temperature
- 40 C
Package / Case
TO-252
Mounting Style
SMD/SMT
Voltage Regulation Accuracy
2 %
Output Voltage Fixed
12V
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

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Features
Description
The L78MxxA 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
shutdown 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.
July 2009
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
± 2 % Output voltage tolerance
Guaranteed in extended temperature range
Device summary
L78M05AB
L78M05AC
L78M06AB
L78M08AB
L78M09AB
L78M10AB
Doc ID 2147 Rev 9
Part numbers
with external components to obtain adjustable
voltage and currents.
Precision 500 mA regulators
TO-220
L78M12AB
L78M12AC
L78M15AB
L78M24AB
L78M24AC
L78MxxAB
L78MxxAC
DPAK
www.st.com
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L78M12ABDT Summary of contents

Page 1

Features ■ Output current to 0.5 A ■ Output voltages 10; 12; 15 ■ Thermal overload protection ■ Short circuit protection ■ Output transition SOA protection ■ ± Output voltage tolerance ...

Page 2

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

Page 3

Diagram Figure 1. Block diagram Doc ID 2147 Rev 9 3/29 ...

Page 4

Pin configuration Figure 2. Pin connections (top view) TO-220 Figure 3. Schematic diagram 4/29 Doc ID 2147 Rev 9 DPAK ...

Page 5

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 ...

Page 6

Test circuits Figure 5. DC parameter Figure 6. Load regulation Figure 7. Ripple rejection 6/29 Doc ID 2147 Rev 9 ...

Page 7

Electrical characteristics Refer to the test circuits -40 to 125 °C (AB Table 4. Electrical characteristics of L78M05XX Symbol Parameter V Output voltage O V Output voltage O ΔV Line regulation O ΔV Load ...

Page 8

Refer to the test circuits -40 to 125 °C (AB Table 5. Electrical characteristics of L78M06XX Symbol Parameter V Output voltage O V Output voltage O ΔV Line regulation O ΔV Load regulation O I ...

Page 9

Refer to the test circuits, V °C (AB 125 °C (AC) unless otherwise specified). J Table 6. Electrical characteristics of L78M08XX Symbol Parameter V Output voltage O V Output voltage O ΔV Line regulation O ΔV ...

Page 10

Refer to the test circuits -40 to 125 °C (AB Table 7. Electrical characteristics of L78M09XX Symbol Parameter V Output voltage O V Output voltage O ΔV Line regulation O ΔV Load regulation O I ...

Page 11

Refer to the test circuits -40 to 125 °C (AB Table 8. Electrical characteristics of L78M10XX Symbol Parameter V Output voltage O V Output voltage O ΔV Line regulation O ΔV Load regulation O I ...

Page 12

Refer to the test circuits -40 to 125 °C (AB Table 9. Electrical characteristics of L78M12XX Symbol Parameter V Output voltage O V Output voltage O ΔV Line regulation O ΔV Load regulation O I ...

Page 13

Refer to the test circuits -40 to 125 °C (AB Table 10. Electrical characteristics of L78M15XX Symbol Parameter V Output voltage O V Output voltage O ΔV Line regulation O ΔV Load regulation O I ...

Page 14

Refer to the test circuits -40 to 125 °C (AB Table 11. Electrical characteristics of L78M24XX Symbol Parameter V Output voltage O V Output voltage O ΔV Line regulation O ΔV Load regulation O I ...

Page 15

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

Page 16

Figure 14. Load transient response Figure 16. Quiescent current vs. input voltage 16/29 Figure 15. Line transient response Doc ID 2147 Rev 9 ...

Page 17

Applications information 7.1 Design considerations The L78MxxA 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 ...

Page 18

Figure 19. Current boost regulator V BEQ1 R = ______________ 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 different grades of ® ECOPACK packages, depending on their level of environmental compliance. ECOPACK specifications, grade definitions and product status are available at ...

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 Doc ID 2147 Rev 9 0068772/G 21/29 ...

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Figure 22. Drawing dimension DPAK type FUJITSU-subcon. 22/29 Doc ID 2147 Rev 9 0068772/G ...

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Figure 23. Drawing dimension DPAK type IDS-subcon. Doc ID 2147 Rev 9 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 Doc ID 2147 Rev 9 inch. 0.264 0.64 0.070 0.118 0.063 0.091 0.091 ...

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

... Order codes Table 14. Order codes Part numbers L78M05AB L78M05AC L78M06AB L78M08AB L78M09AB L78M10AB L78M12AB L78M12AC L78M15AB L78M24AB L78M24AC Packaging TO-220 L78M05ABV L78M05ABDT-TR L78M05ACDT-TR L78M06ABDT-TR L78M08ABDT-TR L78M09ABDT-TR L78M10ABDT-TR L78M12ABV L78M12ABDT-TR L78M12ACDT-TR L78M15ABV L78M15ABDT-TR L78M24ABDT-TR L78M24ACDT-TR Doc ID 2147 Rev 9 DPAK Output voltages 27/29 ...

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 15-Jul-2008 7 15-Apr-2009 8 28-Jul-2009 9 28/29 Changes Order codes updated. DPAK mechanical data updated and add footprint data. Modified: Table 14. ...

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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