L79L STMICROELECTRONICS | Alldatasheet

Document overview

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  • PDF pages: 24

Technical content

Datasheet sections

  • 1 Diagram
  • 2 Pin configuration
  • 3 Maximum ratings
  • 4 Electrical characteristics
  • 5 Package information
  • 5.1 TO-92 package information
  • 5.2 TO-92 packing information
  • 5.3 TO-92 Ammopak package information
  • 5.4 SO-8 package information
  • 5.5 SO-8 packing information
  • 5.6 SOT-89 package information
  • 5.7 SOT-89 packing information
  • 6 Ordering information
  • 7 Revision history

Features

 Output current up to 100 mA  Output voltages of -5; -8;-12; -15 V  Thermal overload protection  Short-circuit protection  No external components are required  Available in ±5% (AC) or ± 10% (C) selection

Description

The L79L series of three-terminal negative regulators employ internal current limiting and thermal shutdown, making them essentially indestructible. If adequate heat-sink is provided, they can deliver up to 100 mA output current. They are intended as fixed voltage regulators in a wide range of applications including local or on- card regulation for elimination of noise and distribution problems associated with single-point regulation. In addition, they can be used with power pass elements to make high-current voltage regulators. The L79L series used as Zener diode/resistor combination replacement, offers an effective output impedance improvement of typically two orders of magnitude, along with lower quiescent current and lower noise.

1 Diagram

Figure 1: Schematic diagram

2 Pin configuration

Figure 2: Pin connection (top view, bottom view for TO-92) Figure 3: Test circuit

3 Maximum ratings

Table 1: Absolute maximum ratings Symbol Parameter Value Unit VI DC input voltage VO = -5 to -9 V -30 V VO = -12 to -15 V -35 IO Output current 100 mA PD Power dissipation Internally limited (1) mW TSTG Storage temperature range -40 to 150 °C TOP Operating junction temperature range For L79LXXAC 0 to 125 For L79LXXAB -40 to 125 Notes: (1) Our SO-8 package used for Voltage Regulators is modified internally to have pins 2, 3, 6 and 7 electrically communed to the die attach flag. This particular frame decreases the total thermal resistance of the package and increases its ability to dissipate power when an appropriate area of copper on the printed circuit board is available for heat-sinking. The external dimensions are the same as for the standard SO-8. Table 2: Thermal data Symbol Parameter SO-8 TO-92 SOT-89 Unit RthJC Thermal resistance junction-case (Max) 20 15 °C/W RthJA Thermal resistance junction-ambient (Max) 55 (1) 200 115 °C/W Notes: (1) Considering 6 cm2 of copper Board heat-sink.

Electrical characteristics L79L

4 Electrical characteristics

Refer to the test circuits, VI = - 10 V, IO = 40 mA, CI = 0.33 μF, CO = 0.1 μF, TJ = 0 to 125 °C for L79L05AC, TJ = -40 to 125 °C for L79L05AB, unless otherwise specified. Table 3: Electrical characteristics of L79L05AC and L79L05AB Symbol Parameter Test conditions Min. Typ. Max. Unit VO Output voltage TJ = 25 °C -4.8 -5 -5.2 V VO Output voltage IO = 1 to 40 mA, VI = -7 to -20 V -4.75 -5.25 V IO = 1 to 70 mA, VI = -10 V -4.75 -5.25 ∆VO Line regulation VI = -7 to -20 V, TJ = 25 °C 150 mV VI = -8 to -20 V, TJ = 25 °C 100 ∆VO Load regulation IO = 1 to 100 mA, TJ = 25 °C mV IO = 1 to 40 mA, TJ = 25 °C Id Quiescent current TJ = 25 °C 6 mA TJ = 125 °C 5.5 mA ∆Id Quiescent current change IO = 1 to 40 mA 0.1 mA VI = -8 to -20 V 1.5 eN Output noise voltage B = 10 Hz to 100 kHz, TJ = 25 °C µV SVR Supply voltage rejection VI = -8 to -18 V, f = 120 Hz IO = 40 mA, TJ = 25 °C 41 49 dB Vd Dropout voltage 1.7 V

Refer to the test circuits, VI = - 14 V, IO = 40 mA, CI = 0.33 μF, CO = 0.1 μF, TJ = 0 to 125 °C for L79L08AC TJ = -40 to 125 °C for L79L08AB, unless otherwise specified. Table 4: Electrical characteristics of L79L08AC and L79L08AB Symbol Parameter Test conditions Min. Typ. Max. Unit VO Output voltage TJ = 25 °C -7.68 -8 -8.32 V VO Output voltage IO = 1 to 40 mA, VI = -10.5 to -23 V -7.6 -8.4 V IO = 1 to 70 mA, VI = -14 V -7.6 -8.4 ∆VO Line regulation VI = -10.5 to -23 V, TJ = 25 °C 175 mV VI = -11 to -23 V, TJ = 25 °C 125 ∆VO Load regulation IO = 1 to 100 mA, TJ = 25 °C mV IO = 1 to 40 mA, TJ = 25 °C Id Quiescent current TJ = 25 °C 6 mA TJ = 125 °C 5.5 mA ∆Id Quiescent current change IO = 1 to 40 mA 0.1 mA VI = -11 to -23 V 1.5 eN Output noise voltage B = 10 Hz to 100 kHz, TJ = 25 °C µV SVR Supply voltage rejection VI = -12 to -23 V, f = 120 Hz, IO = 40 mA, TJ = 25 °C 37 45 dB Vd Dropout voltage 1.7 V

Electrical characteristics L79L Refer to the test circuits, VI = - 19 V, IO = 40 mA, CI = 0.33 μF, CO = 0.1 μF, TJ = 0 to 125 °C for L79L12AC, TJ = -40 to 125 °C for L79L12AB, unless otherwise specified. Table 5: Electrical characteristics of L79L12AC and L79L12AB Symbol Parameter Test conditions Min. Typ. Max. Unit VO Output voltage TJ = 25°C -11.5 -12 -12.5 V VO Output voltage IO = 1 to 40 mA, VI = -14.5 to -27 V -11.4 -12.6 V IO = 1 to 70 mA, VI = -19 V -11.4 -12.6 ∆VO Line regulation VI = -14.5 to -27 V, TJ = 25 °C 250 mV VI = -16 to -27 V, TJ = 25 °C 200 ∆VO Load regulation IO = 1 to 100 mA, TJ = 25 °C 100 mV IO = 1 to 40 mA, TJ = 25 °C Id Quiescent current TJ = 25 °C 6.5 mA TJ = 125 °C 6 mA ∆Id Quiescent current change IO = 1 to 40 mA 0.1 mA VI = -16 to -27 V 1.5 eN Output noise voltage B = 10 Hz to 100 kHz, TJ = 25 °C µV SVR Supply voltage rejection VI = -15 to -25 V, f = 120 Hz IO = 40 mA, TJ = 25 °C 37 42 dB Vd Dropout voltage 1.7 V

Refer to the test circuits, VI = - 23 V, IO = 40 mA, CI = 0.33 μF, CO = 0.1 μF, TJ = 0 to 125 °C for L79L15AC, TJ = -40 to 125 °C for L79L15AB, unless otherwise specified. Table 6: Electrical characteristics of L79L15AC and L79L15AB Symbol Parameter Test conditions Min. Typ. Max. Unit VO Output voltage TJ = 25°C -14.4 -15 -15.6 V VO Output voltage IO = 1 to 40 mA, VI = -17.5 to -30 V -14.25 -15.75 V IO = 1 to 70 mA, VI = -23 V -14.25 -15.75 ∆VO Line regulation VI = -17.5 to -30 V, TJ = 25 °C 300 mV VI = -20 to -30 V, TJ = 25 °C 250 ∆VO Load regulation IO = 1 to 100 mA, TJ = 25 °C 150 mV IO = 1 to 40 mA, TJ = 25 °C Id Quiescent current TJ = 25 °C 6.5 mA TJ = 125 °C 6 mA ∆Id Quiescent current change IO = 1 to 40 mA 0.1 mA VI = -20 to -30 V 1.5 eN Output noise voltage B = 10 Hz to 100 kHz, TJ = 25 °C µV SVR Supply voltage rejection VI = -18.5 to -28.5.V, f = 120 Hz IO = 40 mA, TJ = 25 °C 34 39 dB Vd Dropout voltage 1.7 V

5 Package information

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: www.st.com. ECOPACK® is an ST trademark.

5.1 TO-92 package information

Figure 4: TO-92 package outline Table 7: TO-92 mechanical data Dim. mm Min. Typ. Max. A 4.32 4.95 b 0.36 0.51 D 4.45 4.95 E 3.30 3.94 e 2.41 2.67 e1 1.14 1.40 L 12.70 15.49 R 2.16 2.41 S1 0.92 1.52 W 0.41 0.56 V

5.2 TO-92 packing information

Figure 5: TO-92 tape and reel outline

Table 8: TO-92 tape and reel mechanical data Dim. mm Min. Typ. Max. 4.80 T 3.80 1.60 2.30 d 0.45 0.47 0.48 P0 12.50 12.70 12.90 P2 5.65 6.35 7.05 F1, F2 2.40 2.50 2.94 F3 4.98 5.08 5.48 delta H -2.00 2.00 W 17.50 18.00 19.00 W0 5.5 6.00 6.5 W1 8.50 9.00 9.25 0.50 H 18.50 21 H3 0.5 1 2 H0 15.50 16.00 18.8 25.0 27.0 D0 3.80 4.00 4.20 t 0.90 L 11.00 I1 3.00 delta P -1.00 1.00 Ø1 352 355 358 Ø2 28 30 32 u 44 47 50

5.3 TO-92 Ammopak package information

Figure 6: TO-92 Ammopak tape and reel outline

Table 9: TO-92 Ammopak tape and reel mechanical data Dim. mm Min. Typ. Max. 4.80 T 3.80 1.60 2.30 d 0.45 0.47 0.48 P0 12.50 12.70 12.90 P2 5.65 6.35 7.05 F1, F2 2.40 2.50 2.94 F3 4.98 5.08 5.48 delta H -2.00 2.00 W 17.50 18.00 19.00 W0 5.5 6.00 6.5 W1 8.50 9.00 9.25 0.50 H 18.50 21 H3 0.5 1 2 H0 15.50 16.00 18.8 25.0 27.0 D0 3.80 4.00 4.20 t 0.90 L 11.00 I1 3.00 delta P -1.00 1.00

5.4 SO-8 package information

Figure 7: SO-8 package outline

Table 10: SO-8 mechanical data Dim. mm Min. Typ. Max. A 1.75 A1 0.10 0.25 A2 1.25 b 0.31 0.51 b1 0.28 0.48 c 0.10 0.25 c1 0.10 0.23 D 4.80 4.90 5.00 E 5.80 6.00 6.20 E1 3.80 3.90 4.00 e 1.27 h 0.25 0.50 L 0.40 1.27 1.04 0.25 k 0° ccc 0.10 Figure 8: SO-8 recommended footprint (dimensions are in mm)

5.5 SO-8 packing information

Figure 9: SO-8 tape and reel dimensions Table 11: SO-8 tape and reel mechanical data Dim. mm Min. Typ. Max. A 330 C 12.8 13.2 D 20.2 N 60 T 22.4 Ao 8.1 8.5 Bo 5.5 5.9 Ko 2.1 2.3 Po 3.9 4.1 P 7.9 8.1

5.6 SOT-89 package information

Figure 10: SOT-89 package outline

Table 12: SOT-89 mechanical data Dim. mm Min. Typ. Max. A 1.40 1.60 B 0.44 0.56 B1 0.36 0.48 C 0.35 0.44 C1 0.35 0.44 D 4.40 4.60 D1 1.62 1.83 0.90 E 2.29 2.60 e 1.42 1.57 e1 2.92 3.07 H 3.94 4.25 H1 2.70 3.10 K 1° L 0.89 120 R 0.25 β 90°

Figure 11: SOT-89 recommended footprint

5.7 SOT-89 packing information

Figure 12: SOT-89 carrier tape outline Table 13: SOT-89 carrier tape mechanical data Dim. mm Value Tolerance Ao 4.91 ± 0.10 Bo 4.52 ± 0.10 Ko 1.90 ± 0.10 F 5.50 ± 0.10 E 1.75 ± 0.10 W 12 ± 0.30 P2 2 ± 0.10 Po 4 ± 0.10 P1 8 ± 0.10 T 0.30 ± 0.10 D Ø 1.55 ± 0.05 D1 Ø 1.60 ± 0.10

6 Ordering information

Table 14: Order codes SO-8 TO-92 (bag) TO-92 (Ammopak) TO-92 (tape and reel) SOT-89 Output voltage (V) L79L05ABD13TR L79L05ACZ L79L05ABZ-AP L79L05ABUTR -5 L79L05ACD13TR L79L08ACZ-AP L79L05ACZ-TR L79L05ACUTR -5 L79L08ACD13TR -8 L79L12ACD13TR L79L12ACZ-TR L79L12ACUTR -12 L79L15ABD13TR -15 L79L15ACD13TR L79L15ACUTR -15

7 Revision history

Table 15: Document revision history Date Revision Changes 14-Mar-2005 9 Add Tape and Reel for TO-92. 15-Mar-2005 10 Add note on Table 3. 23-Dec-2005 11 Mistake on ordering Table in Header. 12-Sep-2006 12 Order codes updated. 25-Jul-2007 13 Pin connection for SOT-89 updated on Figure 2. 04-Dec-2007 14 Modified: Table 14. 14-Jul-2008 15 Modified: Table 14 on page 24. 29-Jul-2009 16 Modified: Table 14 on page 24. 17-Apr-2014 17 Part numbers L79LxxAB, L78LxxAC, L78LxxC changed to L79L. Removed Table 1: Device summary. Updated the features and description in cover page. Updated Figure 1: Schematic diagram, Table 1: Absolute maximum ratings and Table 14: Order codes. Added Section 5: Packaging mechanical data. Minor text changes. 12-Feb-2016 18 Updated Section 5: Package information. Minor text changes.