L7905C STMicroelectronics, L7905C Datasheet

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L7905C

Manufacturer Part Number
L7905C
Description
NEGATIVE VOLTAGE REGULATOR
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
D²PAK 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
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. TO-220 Dual Gauge frame.
2.
November 2011
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
TO-220
L7905CV-DG
L7912CV-DG
L7915CV-DG
Doc ID 2149 Rev 20
Order codes
(1)
(1)
(1)
L7920CD2T-TR
L7905CD2T-TR
L7912CD2T-TR
L7915CD2T-TR
D²PAK
Negative voltage regulators
TO-220
(2)
D²PAK
TO-220FP
L7905CP
L7912CP
L7915CP
TO-220FP
L79xxC
voltages
Output
-12 V
-15 V
-20 V
www.st.com
-5 V
-8 V
1/25
25

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L7905C Summary of contents

Page 1

... TO-220 Dual Gauge frame. 2. Available on request. November 2011 Order codes TO-220 D²PAK (1) L7905CV-DG L7905CD2T-TR (1) L7912CV-DG L7912CD2T-TR (1) L7915CV-DG L7915CD2T-TR L7920CD2T-TR Doc ID 2149 Rev 20 L79xxC Negative voltage regulators TO-220 TO-220FP D²PAK TO-220FP L7905CP L7912CP L7915CP (2) Output voltages - -12 V -15 V -20 V 1/25 www.st.com 25 ...

Page 2

Contents Contents 1 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

Page 3

L79xxC 1 Diagram Figure 1. Schematic diagram Doc ID 2149 Rev 20 Diagram 3/25 ...

Page 4

Pin configuration 2 Pin configuration Figure 2. Pin connections (top view) TO-220 4/25 D²PAK (any type) Doc ID 2149 Rev 20 L79xxC TO220FP ...

Page 5

L79xxC 3 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 ...

Page 6

Test circuit 4 Test circuit Figure 3. Test circuit 6/25 Doc ID 2149 Rev 20 L79xxC ...

Page 7

... L79xxC 5 Electrical characteristics Refer to the test circuits, T unless otherwise specified. Table 4. Electrical characteristics of L7905C Symbol Parameter V Output voltage O V Output voltage O ΔV (1) Line regulation O ΔV (1) Load regulation O I Quiescent current d ΔI Quiescent current change d ΔV /ΔT Output voltage drift O eN Output noise voltage ...

Page 8

Electrical characteristics Refer to the test circuits, T unless otherwise specified. Table 5. Electrical characteristics of L7908C Symbol Parameter V Output voltage O V Output voltage O ΔV (1) Line regulation O ΔV (1) Load regulation O I Quiescent current ...

Page 9

L79xxC Refer to the test circuits, T unless otherwise specified. Table 6. Electrical characteristics of L7912C Symbol Parameter V Output voltage O V Output voltage O ΔV (1) Line regulation O ΔV (1) Load regulation O I Quiescent current d ...

Page 10

Electrical characteristics Refer to the test circuits, T unless otherwise specified. Table 7. Electrical characteristics of L7915C Symbol Parameter V Output voltage O V Output voltage O ΔV (1) Line regulation O ΔV (1) Load regulation O I Quiescent current ...

Page 11

L79xxC Refer to the test circuits, T unless otherwise specified. Table 8. Electrical characteristics of L7920C Symbol Parameter V Output voltage O V Output voltage O ΔV (1) Line regulation O ΔV (1) Load regulation O I Quiescent current d ...

Page 12

Application information 6 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 ...

Page 13

L79xxC Figure 6. Circuit for increasing output voltage )/ > Optional for improved transient response and ripple rejection. Figure 7. High current negative regulator ...

Page 14

Package mechanical data 7 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 ...

Page 15

L79xxC Figure 8. Drawing dimension TO-220 (type STD-ST Dual Gauge) Doc ID 2149 Rev 20 Package mechanical data 0015988_S 15/25 ...

Page 16

Package mechanical data Figure 9. Drawing dimension TO-220 (type STD-ST Single Gauge) 16/25 Doc ID 2149 Rev 20 L79xxC 8174627_B ...

Page 17

L79xxC Figure 10. Drawing dimension tube for TO-220 Dual Gauge (mm) Figure 11. Drawing dimension tube for TO-220 Single Gauge (mm) Doc ID 2149 Rev 20 Package mechanical data 17/25 ...

Page 18

Package mechanical data 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 18/25 TO-220FP ...

Page 19

L79xxC Figure 12. Drawing dimension D²PAK (type STD-ST) Doc ID 2149 Rev 20 Package mechanical data 0079457/L 19/25 ...

Page 20

Package mechanical data Figure 13. Drawing dimension D²PAK (type WOOSEOK-subcon.) 20/25 Doc ID 2149 Rev 20 L79xxC 0079457/L ...

Page 21

L79xxC Table 10. D²PAK mechanical data 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 L1 1.27 L2 ...

Page 22

Package mechanical data Figure 14. D²PAK footprint recommended data Table 11. Footprint data Dim 22/25 Values mm. 12.20 9.75 16.90 3.50 1.60 2.54 5.08 Doc ID 2149 Rev 20 L79xxC inch. 0.480 0.384 ...

Page 23

L79xxC 2 Tape & reel D PAK-P Dim. Min 12 10.50 Bo 15.70 Ko 4.80 Po 3 PAK-D PAK/A-P PAK/A mechanical data mm. Typ. Max. 180 13.0 ...

Page 24

... Table 9 on page 14, added: page 16, Figure 10 and Figure 11 on page Modified: V parameter Table 2 on page I Modified: R value for TO-220 thJC Added order codes L7905CV-DG, L7912CV-DG and L7915CV-DG page 1. Doc ID 2149 Rev 20 Changes and Figure 7. Figure 8 on page 15, Figure 9 on 17. 5. Table 3 on page 5 ...

Page 25

... L79xxC 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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