Datasheet

ManualsBrandsSTMICROELECTRONICS ManualsVoltage RegulatorsL79L12ACD13TR

July 2009 Doc ID 2511 Rev 16 1/27

L79LxxAB

L79LxxAC - L79LxxC

Negative voltage regulators

Features

■ Output current up to 100 mA

■ Output voltages of -5; -6; -8; -9; -12; -15 V

■ Thermal overload protection

■ Short circuit protection

■ No external components are required

■ Available in either ±5% (AC) or ±10% (C)

selection

Description

The L79Lxx 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 L79Lxx 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.

SOT-89

TO-92

SO-8

Table 1. Device summary

Part numbers

L79L05AC L79L09AC

L79L05AB L79L09AB

L79L06C L79L12C

L79L06AC L79L12AC

L79L06AB L79L12AB

L79L08C L79L15C

L79L08AC L79L15AC

L79L08AB L79L15AB

L79L09C

www.st.com

Summary of content (27 pages)

PAGE 1
L79LxxAB L79LxxAC - L79LxxC Negative voltage regulators Features ■ Output current up to 100 mA ■ Output voltages of -5; -6; -8; -9; -12; -15 V ■ Thermal overload protection ■ Short circuit protection ■ No external components are required ■ Available in either ±5% (AC) or ±10% (C) selection TO-92 Description The L79Lxx series of three-terminal negative regulators employ internal current limiting and thermal shutdown, making them essentially indestructible.
PAGE 2
L79LxxAB, L79LxxAC, L79LxxC Contents 1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 5 Package mechanical data . .
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L79LxxAB, L79LxxAC, L79LxxC 1 Diagram Figure 1.
PAGE 4
Pin configuration L79LxxAB, L79LxxAC, L79LxxC 2 Pin configuration Figure 2. Pin connection (top view, bottom view for TO-92) PIN 1 = GND PIN 2 = VIN PIN 3 = VOUT SO-8 Figure 3.
PAGE 5
L79LxxAB, L79LxxAC, L79LxxC Maximum ratings 3 Maximum ratings Table 2. 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 -40 to 150 TOP Operating junction temperature range For L79L00C, L79L00AC (1) mW °C 0 to 125 °C For L79L00AB -40 to 125 1.
PAGE 6
Electrical characteristics 4 L79LxxAB, L79LxxAC, L79LxxC Electrical characteristics Refer to the test circuits, TJ = 0 to 125 °C, VI = -10 V, IO = 40 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified. Table 4. Symbol Electrical characteristics of L79L05 Parameter VO Output voltage VO Output voltage ΔVO Line regulation ΔVO Load regulation Id Quiescent current Test conditions Min. Typ. Max. Unit TJ = 25°C -4.6 -5 -5.4 V IO = 1 to 40 mA, VI = -7 to -20 V -4.5 -5.
PAGE 7
L79LxxAB, L79LxxAC, L79LxxC Electrical characteristics Refer to the test circuits, TJ = 0 to 125 °C, VI = -12 V, IO = 40 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified. Table 5. Symbol Electrical characteristics of L79L06 Parameter VO Output voltage VO Output voltage ΔVO Line regulation ΔVO Load regulation Id Quiescent current Test conditions Min. Typ. Max. Unit TJ = 25°C -5.52 -6 -6.48 V IO = 1 to 40 mA, VI = -8.5 to -20 V -5.4 -6.6 IO = 1 to 70 mA, VI = -12 V -5.
PAGE 8
Electrical characteristics L79LxxAB, L79LxxAC, L79LxxC Refer to the test circuits, TJ = 0 to 125 °C, VI = -14 V, IO = 40 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified. Table 6. Symbol Electrical characteristics of L79L08 Parameter VO Output voltage VO Output voltage ΔVO Line regulation ΔVO Load regulation Id Quiescent current Test conditions Min. Typ. Max. Unit TJ = 25°C -7.36 -8 -8.64 V IO = 1 to 40 mA, VI = -10.5 to -23 V -7.2 -8.8 IO = 1 to 70 mA, VI = -14 V -7.
PAGE 9
L79LxxAB, L79LxxAC, L79LxxC Electrical characteristics Refer to the test circuits, TJ = 0 to 125 °C, VI = -15 V, IO = 40 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified. Table 7. Symbol Electrical characteristics of L79L09 Parameter VO Output voltage VO Output voltage ΔVO Line regulation ΔVO Load regulation Id Quiescent current Test conditions Min. Typ. Max. Unit TJ = 25°C -8.28 -9 -9.72 V IO = 1 to 40 mA, VI = -11.5 to -23 V -8.1 -9.9 IO = 1 to 70 mA, VI = -15 V -8.
PAGE 10
Electrical characteristics L79LxxAB, L79LxxAC, L79LxxC Refer to the test circuits, TJ = 0 to 125 °C, VI = - 19 V, IO = 40 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified. Table 8. Symbol Electrical characteristics of L79L12 Parameter VO Output voltage VO Output voltage ΔVO Line regulation ΔVO Load regulation Id Quiescent current Test conditions Min. Typ. Max. Unit TJ = 25°C -11.1 -12 -12.9 V IO = 1 to 40 mA, VI = -14.5 to -27 V -10.8 -13.
PAGE 11
L79LxxAB, L79LxxAC, L79LxxC Electrical characteristics Refer to the test circuits, TJ = 0 to 125 °C, VI = - 23 V, IO = 40 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified. Table 9. Symbol Electrical characteristics of L79L15 Parameter VO Output voltage VO Output voltage ΔVO Line regulation ΔVO Load regulation Id Quiescent current Test conditions Min. Typ. Max. Unit TJ = 25°C -13.8 -15 -16.2 V IO = 1 to 40 mA, VI = -17.5 to -30 V -13.5 -16.
PAGE 12
Electrical characteristics L79LxxAB, L79LxxAC, L79LxxC 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 10. Symbol Electrical characteristics of L79L05AB and L79L05AC Parameter VO Output voltage VO Output voltage ΔVO Line regulation ΔVO Load regulation Id Quiescent current Test conditions Min. Typ. Max. Unit TJ = 25°C -4.8 -5 -5.
PAGE 13
L79LxxAB, L79LxxAC, L79LxxC Electrical characteristics Refer to the test circuits, VI = - 12 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 11. Symbol Electrical characteristics of L79L06AB and L79L06AC Parameter VO Output voltage VO Output voltage ΔVO Line regulation ΔVO Load regulation Id Quiescent current Test conditions Min. Typ. Max. Unit TJ = 25°C -5.76 -6 -6.
PAGE 14
Electrical characteristics L79LxxAB, L79LxxAC, L79LxxC 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 L79L05AC, TJ = -40 to 125 °C for L79L05AB, unless otherwise specified. Table 12. Symbol Electrical characteristics of L79L08AB and L79L08AC Parameter VO Output voltage VO Output voltage ΔVO Line regulation ΔVO Load regulation Id Quiescent current Test conditions Min. Typ. Max. Unit TJ = 25°C -7.68 -8 -8.
PAGE 15
L79LxxAB, L79LxxAC, L79LxxC Electrical characteristics Refer to the test circuits, VI = - 15 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 13. Symbol Electrical characteristics of L79L09AB and L79L09AC Parameter VO Output voltage VO Output voltage ΔVO Line regulation ΔVO Load regulation Id Quiescent current Test conditions Min. Typ. Max. Unit TJ = 25°C -8.64 -9 -9.
PAGE 16
Electrical characteristics L79LxxAB, L79LxxAC, L79LxxC 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 L79L05AC, TJ = -40 to 125 °C for L79L05AB, unless otherwise specified. Table 14. Symbol Electrical characteristics of L79L12AB and L79L12AC Parameter VO Output voltage VO Output voltage ΔVO Line regulation ΔVO Load regulation Id Quiescent current Test conditions Min. Typ. Max. Unit TJ = 25°C -11.5 -12 -12.
PAGE 17
L79LxxAB, L79LxxAC, L79LxxC 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 L79L05AC, TJ = -40 to 125 °C for L79L05AB, unless otherwise specified. Table 15. Symbol Electrical characteristics of L79L15AB and L79L15AC Parameter VO Output voltage VO Output voltage ΔVO Line regulation ΔVO Load regulation Id Quiescent current Test conditions Min. Typ. Max. Unit TJ = 25°C -14.4 -15 -15.
PAGE 18
Package mechanical data 5 L79LxxAB, L79LxxAC, L79LxxC 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 at: www.st.com. ECOPACK® is an ST trademark.
PAGE 19
L79LxxAB, L79LxxAC, L79LxxC Package mechanical data SO-8 mechanical data Dim. mm. Min. Typ. inch. Max. Min. Typ. Max. A 1.35 1.75 0.053 0.069 A1 0.10 0.25 0.04 0.010 A2 1.10 1.65 0.043 0.065 B 0.33 0.51 0.013 0.020 C 0.19 0.25 0.007 0.010 D 4.80 5.00 0.189 0.197 E 3.80 4.00 0.150 0.157 e 1.27 0.050 H 5.80 6.20 0.228 0.244 h 0.25 0.50 0.010 0.020 L 0.40 1.27 0.016 0.050 k ddd 8° (max.) 0.1 0.
PAGE 20
Package mechanical data L79LxxAB, L79LxxAC, L79LxxC SOT-89 mechanical data mm. mils. Dim. Min. Typ. Max. Min. Typ. Max. A 1.4 1.6 55.1 63.0 B 0.44 0.56 17.3 22.0 B1 0.36 0.48 14.2 18.9 C 0.35 0.44 13.8 17.3 C1 0.35 0.44 13.8 17.3 D 4.4 4.6 173.2 181.1 D1 1.62 1.83 63.8 72.0 E 2.29 2.6 90.2 102.4 e 1.42 1.57 55.9 61.8 e1 2.92 3.07 115.0 120.9 H 3.94 4.25 155.1 167.3 L 0.89 1.2 35.0 47.
PAGE 21
L79LxxAB, L79LxxAC, L79LxxC Package mechanical data TO-92 mechanical data mm. mils. Dim. Min. Typ. Max. Min. Typ. Max. A 4.32 4.95 170.1 194.9 b 0.36 0.51 14.2 20.1 D 4.45 4.95 175.2 194.9 E 3.30 3.94 129.9 155.1 e 2.41 2.67 94.9 105.1 e1 1.14 1.40 44.9 55.1 L 12.7 15.49 500.0 609.8 R 2.16 2.41 85.0 94.9 S1 0.92 1.52 36.2 59.8 W 0.41 0.56 16.1 22.
PAGE 22
Package mechanical data L79LxxAB, L79LxxAC, L79LxxC Tape & reel SO-8 mechanical data mm. inch. Dim. Min. A Max. Min. 330 13.2 Typ. Max. 12.992 C 12.8 D 20.2 0.795 N 60 2.362 T 22/27 Typ. 0.504 22.4 0.519 0.882 Ao 8.1 8.5 0.319 0.335 Bo 5.5 5.9 0.216 0.232 Ko 2.1 2.3 0.082 0.090 Po 3.9 4.1 0.153 0.161 P 7.9 8.1 0.311 0.
PAGE 23
L79LxxAB, L79LxxAC, L79LxxC Package mechanical data Tape & reel SOT-89 mechanical data mm. inch. Dim. Min. Typ. A Max. Min. Typ. 180 13.0 7.086 C 12.8 D 20.2 0.795 N 60 2.362 T 13.2 Max. 0.504 0.512 14.4 0.519 0.567 Ao 4.70 4.80 4.90 0.185 0.189 0.193 Bo 4.30 4.40 4.50 0.169 0.173 0.177 Ko 1.70 1.80 1.90 0.067 0.071 0.075 Po 3.9 4.0 4.1 0.153 0.157 0.161 P 7.9 8.0 8.1 0.311 0.315 0.
PAGE 24
Package mechanical data L79LxxAB, L79LxxAC, L79LxxC Tape & reel for TO-92 mechanical data Dim. A1 T T1 T2 d P0 P2 F1, F2 delta H W W0 W1 W2 H H0 H1 D0 t L1 delta P u Φ1 Φ2 mm. Min. inch. Typ. Max. Min. 4.80 3.80 1.60 2.30 0.48 12.5 5.65 2.44 17.5 5.7 8.5 Typ. Max. 0.189 0.150 0.063 0.091 0.019 2.54 ±2 18.00 0.50 18.50 15.50 12.9 7.05 2.94 0.492 0.222 0.096 19.0 6.3 9.25 0.689 0.224 0.335 0.508 0.278 0.116 0.100 0.079 0.709 0.748 0.248 0.364 0.20 0.728 18.70 16.50 0.610 4.2 0.
PAGE 25
L79LxxAB, L79LxxAC, L79LxxC 6 Order codes Table 16.
PAGE 26
Revision history L79LxxAB, L79LxxAC, L79LxxC 7 Revision history Table 17. Document revision history Date Revision 14-Mar-2005 9 Add Tape & 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, add Table 1 in cover page. 04-Dec-2007 14 Modified: Table 16. 14-Jul-2008 15 Modified: Table 16 on page 25.
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L79LxxAB, L79LxxAC, L79LxxC 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.