L7905CV-DG STMICROELECTRONICS | Alldatasheet

Document overview

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  • PDF pages: 24

Technical content

Datasheet sections

  • 1 Diagram
  • 2 Pin configuration
  • 3 Maximum ratings
  • 4 Test circuit
  • 5 Electrical characteristics
  • 6 Application information
  • 7 Package mechanical data
  • 8 Revision history

Features

■ Output current up to 1.5 A ■ Output voltages of - 5; - 8; - 12; - 15 V ■ Thermal overload protection ■ Short circuit protection ■ Output transition SOA protection

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. TO-220FP D²PAK TO-220 Table 1. Device summary

1 Diagram

Figure 1. Schematic diagram

2 Pin configuration

Figure 2. Pin connections (top view)

3 Maximum ratings

Note: Absolute maximum ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied. Table 2. Absolute maximum ratings Table 3. Thermal data

4 Test circuit

Figure 3. Test circuit

5 Electrical characteristics

Table 4. Electrical characteristics of L7905C

  1. Load and line regulation are specified at cons tant junction temperature. Changes in V O due to heating effects must be

taken into account separately. Pulse testing with low duty cycle is used.

Table 5. Electrical characteristics of L7908C

  1. Load and line regulation are specified at cons tant junction temperature. Changes in V O due to heating effects must be

taken into account separately. Pulse testing with low duty cycle is used.

Table 6. Electrical characteristics of L7912C

  1. Load and line regulation are specified at cons tant junction temperature. Changes in V O due to heating effects must be

taken into account separately. Pulse testing with low duty cycle is used.

Table 7. Electrical characteristics of L7915C

  1. Load and line regulation are specified at cons tant junction temperature. Changes in V O due to heating effects must be

taken into account separately. Pulse testing with low duty cycle is used.

6 Application information

  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,
  3. To improve transient response. If large capacitors are used, a high current diode from input to output

(1N4001 or similar) should be introduced to protect the device from momentary input short circuit. (*) Against potential latch-up problems. Figure 4. Fixed output regulator Figure 5. Split power supply (± 15 V - 1 A)

7 Package mechanical data

specifications, grade definitions and product status are available at: www.st.com. ECOPACK® is an ST trademark. Note: In spite of some difference in tolerances, the packages are compatible. Table 8. TO-220 mechanical data

Figure 8. Drawing dimension TO-220 (type STD-ST Dual Gauge)

Figure 9. Drawing dimension TO-220 (type STD-ST Single Gauge)

L79xxC Package mechanical data Doc ID 2149 Rev 21 17/24 Dim. mm. inch. A 4.40 4.60 0.17 3 0.181 B 2.5 2.7 0.0 98 0.106 D 2.5 2.75 0.0 98 0.108 E 0.45 0.70 0.017 0.027 F 0.75 1 0.0 300 . 0 39 F1 1.15 1.50 0.045 0.05 9 F2 1.15 1.50 0.045 0.05 9 G4 . 95 5.2 0.1 94 0.204 G1 2.4 2.7 0.0 94 0.106 H 10.0 10.40 0. 393 0.409 L2 16 0.6 30 L3 28.6 30.6 1.126 1.204 L4 9.8 10.6 0. 3850 . 4 1 7 L5 2. 93 .6 0.114 0.142 L6 15. 9 16.4 0.626 0.645 L7 99 .3 0.354 0. 366 DIA. 33 .2 0.11 8 0.126 TO-220FP mechanical data 7012510A-H

Figure 12. Drawing dimension D²PAK (type STD-ST)

Figure 13. Drawing dimension D²PAK (type WOOSEOK-subcon.)

ST's package suggested footprint. Table 9. D²PAK mechanical data Type STD-ST Type WOOSEOK-subcon.

Figure 14. D²PAK footprint recommended data Table 10. Footprint data

Package mechanical data L79xxC 22/24 Doc ID 2149 Rev 21 Dim. mm. inch. A1 80 7.0 86 D 20.2 0.7 95 N6 0 2 . 362 T 14.4 0.567 Tape & reel D2PAK-P2PAK-D2PAK/A-P2PAK/A mechanical data

8 Revision history

Table 11. Document revision history 22-Jun-2004 9 Order codes updated Table 3. 31-Aug-2005 10 Add new order codes (TO-220 E Type) on Table 3. 19-Jan-2007 11 D²PAK mechanical data updated and add footprint data. 06-Jun-2007 12 Order codes updated. 25-Oct-2007 13 Modified: Figure 3, Figure 4, Figure 6 and Figure 7. 05-Dec-2007 14 Modified: Ta bl e 1. 18-Feb-2008 15 Modified: Table 1 on page 1. 15-Jul-2008 16 Modified: Table 1 on page 1. page 15, Figure 10 and Figure 11 on page 16. 26-May-2010 18 Modified: V I parameter Table 2 on page 5. 12-Nov-2010 19 Modified: R thJC value for TO-220 Table 3 on page 5. 15-May-2012 21 Added: order codes L7908CV-DG Table 1 on page 1.