Datasheet

ManualsBrandsSTMICROELECTRONICS ManualsVoltage RegulatorsFixed voltage regulator 0.1A, negative

This is information on a product in full production.

April 2014 DocID2511 Rev 17 1/26

L79L

Negative voltage regulators

Datasheet

production data

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.

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Summary of content (26 pages)

PAGE 1
L79L Negative voltage regulators Datasheet - production data 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.
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Contents L79L Contents 1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 5 4.1 TO-92 . . . . . . . . . . . . . . .
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L79L 1 Diagram Diagram Figure 1.
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Pin configuration 2 L79L Pin configuration Figure 2. Pin connection (top view, bottom view for TO-92) PIN 1 = GND PIN 2 = VIN PIN 3 = VOUT SO-8 SOT-89 TO-92 Figure 3.
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L79L 3 Maximum ratings Maximum ratings Table 1. Absolute maximum ratings Symbol Parameter VI DC input voltage IO Output current PD Value VO = -5 to -9 V -30 VO = -12 to -15 V -35 Unit V 100 Power dissipation mA Internally limited TSTG Storage temperature range TOP Operating junction temperature range -40 to 150 For L79LXXAC 0 to 125 For L79LXXAB -40 to 125 (1) mW °C °C 1.
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Electrical characteristics 4 L79L 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 VO Output voltage VO Output voltage DVO Line regulation DVO Load regulation Id Quiescent current Test conditions Min. Typ. Max. Unit TJ = 25°C -4.8 -5 -5.
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L79L Electrical characteristics 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 VO Output voltage VO Output voltage DVO Line regulation DVO Load regulation Id Quiescent current Test conditions Min. Typ. Max. Unit TJ = 25°C -7.68 -8 -8.32 V IO = 1 to 40 mA, VI = -10.5 to -23 V -7.6 -8.
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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 VO Output voltage VO Output voltage DVO Line regulation DVO Load regulation Id Quiescent current Test conditions Min. Typ. Max. Unit TJ = 25°C -11.5 -12 -12.5 V IO = 1 to 40 mA, VI = -14.5 to -27 V -11.
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L79L Electrical characteristics 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 VO Output voltage VO Output voltage DVO Line regulation DVO Load regulation Id Quiescent current Test conditions Min. Typ. Max. Unit TJ = 25°C -14.4 -15 -15.6 V IO = 1 to 40 mA, VI = -17.5 to -30 V -14.
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Electrical characteristics 4.1 L79L TO-92 Figure 4.
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L79L Electrical characteristics Table 7. TO-92 mechanical data mm Dim. Min. Typ. 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 4.2 Max. 5° SO-8 Figure 5.
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Electrical characteristics L79L Table 8. SO-8 mechanical data mm Dim. Min. Typ. 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 L1 1.04 L2 0.25 k 0° 8° ccc 12/26 Max. 0.
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L79L Electrical characteristics Figure 6.
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Electrical characteristics 4.3 L79L SOT-89 Figure 7.
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L79L Electrical characteristics Table 9. SOT-89 mechanical data mm Dim. 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 D3 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° 8° L 0.89 1.20 R 0.
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Electrical characteristics L79L Figure 8.
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L79L Packaging mechanical data 5 Packaging mechanical data 5.1 Tape and reel for TO-92 Figure 9.
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Packaging mechanical data L79L Table 10. TO-92 tape and reel mechanical data mm Dim. Min. Typ. A1 4.80 T 3.80 T1 1.60 T2 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 W 17.50 18.00 19.00 W0 5.5 6.00 6.5 W1 8.50 9.00 9.25 2.00 W2 0.50 H 18.50 21 H3 0.5 1 2 H0 15.50 16.00 18.8 25.0 27.0 4.00 4.20 H1 D0 18/26 Max. 3.80 t 0.90 L 11.00 l1 3.00 delta P -1.
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L79L 5.2 Packaging mechanical data Tape and reel for TO-92 Ammopak Figure 10.
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Packaging mechanical data L79L Table 11. TO-92 Ammopak mechanical data mm Dim. Min. Typ. A1 4.80 T 3.80 T1 1.60 T2 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 W 17.50 18.00 19.00 W0 5.5 6.00 6.5 W1 8.50 9.00 9.25 2.00 W2 0.50 H 18.50 21 H3 0.5 1 2 H0 15.50 16.00 18.8 25.0 27.0 4.00 4.20 H1 D0 20/26 Max. 3.80 t 0.90 L 11.00 l1 3.00 delta P -1.
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L79L 5.3 Packaging mechanical data Tape and reel for SOT-89 Figure 11. SOT-89 carrier tape drawing B( Table 12. SOT-89 carrier tape dimensions mm. Dim. Values Tolerance Ao 4.52 ± 0.10 Bo 4.91 ± 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 Æ 1.55 ± 0.05 D1 Æ 1.60 ± 0.
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Packaging mechanical data 5.4 L79L Tape and reel for SO-8 Figure 12.
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L79L Packaging mechanical data Table 13. SO-8 tape and reel mechanical data Dim. Min. Typ. A Max. 330 C 12.8 D 20.2 N 60 13.2 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.
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Order codes 6 L79L Order codes Table 14.
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L79L Revision history 7 Revision history Table 15. Document revision history Date Revision 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.
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L79L Please Read Carefully: 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.