l7912c STMicroelectronics, l7912c Datasheet

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l7912c

Manufacturer Part Number
l7912c
Description
Negative Voltage Regulators
Manufacturer
STMicroelectronics
Datasheet

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Features
Description
The L79XXC series of three-terminal negative
regulators is available in TO-220, TO-220FP and
D
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;
furthermore, having the same voltage option as
the L78XX positive standard series, they are
particularly suited for split power supplies. If
adequate heat sinking is provided, they can
deliver over 1.5 A output current.
Although designed primarily as fixed voltage
regulators, these devices can be used with
external components to obtain adjustable
voltages and currents.
Table 1.
1.
February 2008
2
PAK packages and several fixed output
Part numbers
Output current up to 1.5 A
Output voltages of -5; -8; -12; -15; -20 V
Thermal overload protection
Short circuit protection
Output transition SOA protection
Available on request.
L7905C
L7908C
L7912C
L7915C
L7920C
Device summary
L7905CV
L7908CV
L7912CV
L7915CV
L7920CV
(A type)
TO-220
L7920CD2T-TR
L7905CD2T-TR
L7912CD2T-TR
L7915CD2T-TR
Order codes
D
Rev 15
2
PAK
(1)
Negative voltage regulators
TO-220
TO-220FP
L7905CP
L7912CP
L7915CP
D
2
PAK
TO-220FP
L79xxC
voltages
Output
-12 V
-15 V
-20 V
-5 V
-8 V
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l7912c Summary of contents

Page 1

... L7908CV L7912C L7912CV L7915C L7915CV L7920C L7920CV 1. Available on request. February 2008 Negative voltage regulators TO-220 Order codes 2 D PAK TO-220FP L7905CD2T-TR L7912CD2T-TR L7915CD2T-TR (1) L7920CD2T-TR Rev 15 L79xxC TO-220FP 2 D PAK Output voltages L7905CP - L7912CP -12 V L7915CP -15 V -20 V 1/21 www.st.com 21 ...

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

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Diagram Figure 1. Schematic diagram 3/21 ...

Page 4

Pin configuration Figure 2. Pin connections (top view) TO-220 4/21 TO220FP 2 D PAK (any type) ...

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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 circuit Figure 3. Test circuit 6/21 ...

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Electrical characteristics Table 4. Electrical characteristics of L7905C (refer to the test circuits 500 mA 2.2 µ Symbol Parameter V Output voltage O V Output voltage O (1) ΔV Line regulation ...

Page 8

... I Short circuit current sc 1. Load and line regulation are specified at constant junction temperature. Changes in V taken into account separately. Pulse testing with low duty cycle is used. Table 6. Electrical characteristics of L7912C (refer to the test circuits 500 mA 2.2 µ Symbol ...

Page 9

Table 7. Electrical characteristics of L7915C (refer to the test circuits 500 mA 2.2 µ Symbol Parameter V Output voltage O V Output voltage O ΔV (1) Line regulation O ΔV (1) ...

Page 10

Application information Figure 4. Fixed output regulator 1. To specify an output voltage, substitute voltage value for "XX". 2. Required for stability. For value given, capacitor must be solid tantalum. If aluminium electrolytic are used, at least ten times ...

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Figure 6. Circuit for increasing output voltage )/ > Optional for improved transient response and ripple rejection. Figure 7. High current negative regulator (-5 ...

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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 13

TO-220 (A type) mechanical data mm. Dim. Min. Typ. A 4.40 b 0.61 b1 1.15 c 0.49 D 15.25 E 10.0 e 2.4 e1 4.95 F 1.23 H1 6.2 J1 2.40 L 13.0 L1 3.5 L20 16.4 L30 28.9 φP ...

Page 14

Dim. Min. A 4.40 B 2.5 D 2.5 E 0.45 F 0.75 F1 1.15 F2 1.15 G 4.95 G1 2 28.6 L4 9.8 L5 2 DIA. 3 14/21 TO-220FP mechanical data mm. ...

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Figure 8. Drawing dimension D 2 PAK (type STD-ST) 0079457/L 15/21 ...

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Figure 9. Drawing dimension D 16/21 2 PAK (type WOOSEOK-subcon.) 0079457/L ...

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Table 9. D PAK mechanical data Type STD-ST Dim. Min. A 4.40 A1 0.03 b 0.70 b2 1.14 c 0.45 c2 1.23 D 8. 2.49 L 2.29 ...

Page 18

Figure 10. D PAK footprint recommended data Table 10. Footprint data Dim 18/21 Values mm. 12.20 9.75 16.90 3.50 1.60 2.54 5.08 inch. 0.480 0.384 0.665 0.138 0.063 0.100 0.200 ...

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Tape & reel D PAK-P mm. Dim. Min. Typ 12.8 13 10.50 10.6 Bo 15.70 15.80 Ko 4.80 4.90 Po 3.9 4.0 P 11.9 12 PAK-D PAK/A-P PAK/A ...

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Revision history Table 11. Document revision history Date Revision 22-Jun-2004 9 31-Aug-2005 10 19-Jan-2007 11 06-Jun-2007 12 25-Oct-2007 13 05-Dec-2007 14 18-Feb-2008 15 20/21 Changes Order Codes updated Table 3, pag. 3. Add new order codes (TO-220 E Type) ...

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... 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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