L7900_07 STMICROELECTRONICS | Alldatasheet

Document overview

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Technical content

Datasheet sections

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

January 2007 Rev. 11 1/24 L7900 series Negative voltage regulators Feature summary ■ Output current up to 1.5A ■ Output voltages of -5; -6; -8; -12; -15; -18; -20; -24V ■ Thermal overload protection ■ Short circuit protection ■ Output transition SOA protection

Description

The L7900 series of three-terminal negative regulators is available in TO-220, TO-220FP , TO-3 and D 2PAK 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 L7800 positive standard series, they are particularly suited for split power supplies. If adequate heat sinking is provided, they can deliver over 1.5A 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 TO-3 Schematic diagram

1 Pin configuration

Figure 1. Pin connections (top view)

2 Maximum ratings

Table 1. Absolute maximum ratings Table 2. Thermal Data

3 Test circuit

Figure 2. Test circuit

4 Electrical characteristics

Table 3. Electrical characteristics of L7905C (refer to the test circuits, TJ = 0 to 125°C, VI = -10V,

  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 4. Electrical characteristics of L7906C (refer to the test circuits, TJ = 0 to 125°C, VI = -11V,

  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 (refer to the test circuits, TJ = 0 to 125°C, VI = -14V,

  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 (refer to the test circuits, TJ = 0 to 125°C, VI = -19V,

  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 (refer to the test circuits, TJ = 0 to 125°C, VI = -23V,

  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 8. Electrical characteristics of L7918C (refer to the test circuits, TJ = 0 to 125°C, VI = -27V,

  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 9. Electrical characteristics of L7920C (refer to the test circuits, TJ = 0 to 125°C, VI = -29V,

  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 10. Electrical characteristics of L7924C (refer to the test circuits, TJ = 0 to 125°C, VI = -33V,

  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.

5 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 electrolytics 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 3. Fixed output regulator Figure 4. Split power supply (± 15V - 1 A)

L7900 series Package mechanical data

6 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 box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOP ACK is an ST trademark. ECOPACK specifications are available at: www.st.com.

Package mechanical data L7900 series DIM. mm. inch A 11.85 0.466 C 1.70 0.066 D 8.7 0.342 E 20.0 0.787 G 10.9 0.429 N 16.9 0.665 P 26.2 1.031 R 3.88 4.09 0.152 0.161 U 39.5 1.555 V 30.10 1.185 TO-3 MECHANICAL DATA P003C/C E B R C DAP G N VU O

L7900 series Package mechanical data DIM. mm. inch A 4.40 4.60 0.173 0.181 b 0.61 0.88 0.024 0.034 b1 1.15 1.70 0.045 0.067 c 0.49 0.70 0.019 0.027 D 15.25 15.75 0.600 0.620 E 10.0 10.40 0.393 0.409 e 2.4 2.7 0.094 0.106 e1 4.95 5.15 0.194 0.203 F 1.23 1.32 0.048 0.051 H1 6.2 6.6 0.244 0.260 J1 2.40 2.72 0.094 0.107 L 13.0 14.0 0.511 0.551 L1 3.5 3.93 0.137 0.154 L20 16.4 0.645 L30 28.9 1.138 φP 3.75 3.85 0.147 0.151 Q 2.65 2.95 0.104 0.116 TO-220 (A TYPE) MECHANICAL DATA 0015988/N

Package mechanical data L7900 series DIM. mm. inch A 4.40 4.60 0.173 0.181 B 2.5 2.7 0.098 0.106 D 2.5 2.75 0.098 0.108 E 0.45 0.70 0.017 0.027 F 0.75 1 0.030 0.039 F1 1.15 1.50 0.045 0.059 F2 1.15 1.50 0.045 0.059 G 4.95 5.2 0.194 0.204 G1 2.4 2.7 0.094 0.106 H 10.0 10.40 0.393 0.409 L2 16 0.630 L3 28.6 30.6 1.126 1.204 L4 9.8 10.6 0.385 0.417 L5 2.9 3.6 0.114 0.142 L6 15.9 16.4 0.626 0.645 L7 9 9.3 0.354 0.366 DIA. 3 3.2 0.118 0.126 TO-220FP MECHANICAL DATA 7012510A-H

Figure 7. DRAWING DIMENSION D 2PAK (TYPE STD-ST)

Figure 8. DRAWING DIMENSION D 2PAK (TYPE WOOSEOK-SUBCON.)

ST's package suggested footprint. Table 11. D 2PAK MECHANICAL DATA TYPE STD-ST TYPE WOOSEOK-SUBCON.

Figure 9. D 2PAK FOOTPRINT RECOMMENDED DATA Table 12. FOOTPRINT DATA

L7900 series Package mechanical data DIM. mm. inch A 180 7.086 D 20.2 0.795 N 60 2.362 T 14.4 0.567 Tape & Reel D2PAK-P2PAK-D2PAK/A-P2PAK/A MECHANICAL DATA

7 Order code

Table 13. Order code (A Type) D2PAK TO-220FP TO-3 OUT. VOLT.

8 Revision history

Table 14. Revision history 22-Jun-2004 9 Ordering Codes updated Table 3, pag. 3. 31-Aug-2005 10 Add new order codes (TO-220 E Type) on Table 3, pag. 3. document has been reformatted.