Datasheet

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This is information on a product in full production.

October 2013 DocID4340 Rev 18 1/38

L4931

Very low drop voltage regulators with inhibit

Datasheet

production data

Features

• Very low dropout voltage (0.4 V)

• Very low quiescent current

• Typ. 50 µA in OFF mode, 600 µA in ON mode

• Output current up to 250 mA

• Logic controlled electronic shutdown

• Output voltages: 2.7; 3.3; 3.5; 5; 8; 12 V

• Automotive-grade product: 2.7 V, 3.3 V V

OUT

SO-8 package only

• Internal current and thermal limit

• Only 2.2 µF for stability

• Available in ± 1% (AB) or 2% (C) selection at 25

°C

• Supply voltage rejection: 70 dB typ. for 5 V

version

• Temperature range: from -40 to 125 °C

Description

The L4931 is a very low drop regulator available

in SO-8, DPAK, PPAK and TO-92 packages and

in a wide range of output voltages.

The very low drop voltage (0.4 V) and the very

low quiescent current make it particularly suitable

for low noise, low power applications and

especially in battery-powered systems.

A TTL compatible shutdown logic control function

is available in PPAK and SO-8 packages. This

means that when the device is used as a local

regulator, a part of the board can be put in

standby mode, decreasing the total power

consumption. It requires only a 2.2 µF capacitor

for stability allowing space and cost saving.

The L4931 is available as automotive-grade in

SO-8 package only. This device is qualified

according to the specification AEC-Q100 of the

automotive market, in the temperature range from

40 °C to 125 °C, and the statistical tests: PAT,

SYL, SBL are performed.

TO-92

DPAK

SO-8

PPAK

www.st.com

Summary of content (38 pages)

PAGE 1
L4931 Very low drop voltage regulators with inhibit Datasheet - production data Description The L4931 is a very low drop regulator available in SO-8, DPAK, PPAK and TO-92 packages and in a wide range of output voltages. The very low drop voltage (0.4 V) and the very low quiescent current make it particularly suitable for low noise, low power applications and especially in battery-powered systems. PPAK TO-92 DPAK A TTL compatible shutdown logic control function is available in PPAK and SO-8 packages.
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Contents L4931 Contents 1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 4 Application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 5 Electrical characteristics . . . . .
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L4931 List of tables List of tables Table 1. Table 2. Table 3. Table 4. Table 5. Table 6. Table 7. Table 8. Table 9. Table 10. Table 11. Table 12. Table 13. Table 14. Table 15. Table 16. Table 17. Table 18. Table 19. Table 20. Table 21. Table 22. Table 23. Table 24. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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List of figures L4931 List of figures Figure 1. Figure 2. Figure 3. Figure 4. Figure 5. Figure 6. Figure 7. Figure 8. Figure 9. Figure 10. Figure 11. Figure 12. Figure 13. Figure 14. Figure 15. Figure 16. Figure 17. Figure 18. 4/38 Schematic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Pin connections (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Test circuit .
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L4931 1 Diagram Diagram Figure 1.
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Pin configuration 2 L4931 Pin configuration Figure 2.
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L4931 Maximum ratings 3 Maximum ratings Table 1. Absolute maximum ratings Symbol Parameter Value Unit 20 V VI DC Input voltage IO Output current Internally limited mA PD Power dissipation Internally limited mW TSTG Storage temperature range -40 to 150 °C TOP Operating junction temperature range -40 to 125 °C 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.
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Application circuit 4 L4931 Application circuit Figure 3.
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L4931 5 Electrical characteristics Electrical characteristics (Refer to the test circuits, TA = 25 °C, CI = 0.1 µF, CO = 2.2 µF unless otherwise specified). Table 3. L4931Cxx27 electrical characteristics Symbol Parameter VO Output voltage VI Operating input voltage Iout Output current limit Test conditions Min. Typ. Max. IO = 5 mA, VI = 4.7 V 2.646 2.7 2.754 IO = 5 mA, VI = 4.7 V, TA = -25 to 85 °C 2.592 Unit V 2.808 IO = 250 mA 20 300 V mA DVO Line regulation VI = 3.
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Electrical characteristics L4931 (Refer to the test circuits, TA = -40 to 125 °C, CI = 0.1 µF, CO = 2.2 µF unless otherwise specified). Table 4. L4931Cxx27-TRY (automotive-grade) electrical characteristics Symbol Parameter Test conditions Min. Typ. Max. IO = 5 mA, VI = 4.7 V, TA = 25 °C 2.646 2.7 2.754 IO = 5 mA, VI = 4.7 V 2.592 Unit VO Output voltage VI Operating input voltage IO = 250 mA Iout Output current limit TA = 25 °C ΔVO Line regulation VI = 3.4 to 20 V, IO = 0.
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L4931 Electrical characteristics (Refer to the test circuits, TA = 25 °C, CI = 0.1 µF, CO = 2.2 µF unless otherwise specified). Table 5. L4931ABxx33 electrical characteristics Symbol Parameter Test conditions Min. Typ. Max. IO = 5 mA, VI = 5.3 V 3.267 3.3 3.333 IO = 5 mA, VI = 5.3 V, TA=-25 to 85 °C 3.234 Unit VO Output voltage VI Operating input voltage Iout Output current limit ΔVO Line regulation VI = 4 to 20 V, IO = 0.5 mA 3 15 mV ΔVO Load regulation (1) VI = 4.2 V, IO = 0.
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Electrical characteristics L4931 (Refer to the test circuits, TA = 25 °C, CI = 0.1 µF, CO = 2.2 µF unless otherwise specified). Table 6. L4931Cxx33 electrical characteristics Symbol Parameter Test conditions Min. Typ. Max. IO = 5 mA, VI = 5.3 V 3.234 3.3 3.366 IO = 5 mA, VI = 5.3 V, TA=-25 to 85 °C 3.168 Unit VO Output voltage VI Operating input voltage Iout Output current limit ΔVO Line regulation VI = 4.1 to 20 V, IO = 0.5 mA 3 18 mV ΔVO Load regulation (1) VI = 4.3 V, IO = 0.
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L4931 Electrical characteristics (Refer to the test circuits, TA = -40 to 125 °C, CI = 0.1 µF, CO = 2.2 µF unless otherwise specified). Table 7. L4931Cxx33-TRY (automotive-grade) electrical characteristics Symbol Parameter Test conditions Min. Typ. Max. IO = 5 mA, VI = 5.3 V, TA = 25 °C 3.234 3.3 3.366 IO = 5 mA, VI = 5.3 V 3.168 Unit VO Output voltage VI Operating input voltage IO = 250 mA Iout Output current limit TA = 25 °C ΔVO Line regulation VI = 4.1 to 20 V, IO = 0.
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Electrical characteristics L4931 (Refer to the test circuits, TA = 25 °C, CI = 0.1 µF, CO = 2.2 µF unless otherwise specified). Table 8. L4931ABxx35 electrical characteristics Symbol Parameter Test conditions Min. Typ. Max. IO = 5 mA, VI = 5.5 V 3.465 3.5 3.535 IO = 5 mA, VI = 5.5 V, TA=-25 to 85 °C 3.43 Unit VO Output voltage VI Operating input voltage Iout Output current limit ΔVO Line regulation VI = 4.2 to 20 V, IO = 0.5 mA 3 15 mV ΔVO Load regulation (1) VI = 4.4 V, IO = 0.
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L4931 Electrical characteristics (Refer to the test circuits, TA = 25 °C, CI = 0.1 µF, CO = 2.2 µF unless otherwise specified). Table 9. L4931Cxx35 electrical characteristics Symbol Parameter Test conditions Min. Typ. Max. IO = 5 mA, VI = 5.5 V 3.43 3.5 3.57 IO = 5 mA, VI = 5.5 V, TA=-25 to 85 °C 3.36 Unit VO Output voltage VI Operating input voltage Iout Output current limit ΔVO Line regulation VI = 4.3 to 20 V, IO = 0.5 mA 3 18 mV ΔVO Load regulation (1) VI = 4.5 V, IO = 0.
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Electrical characteristics L4931 (Refer to the test circuits, TA = 25 °C, CI = 0.1 µF, CO = 2.2 µF unless otherwise specified). Table 10. L4931ABxx50 electrical characteristics Symbol Parameter Test conditions Min. Typ. Max. IO = 5 mA, VI = 7 V 4.95 5 5.05 IO = 5 mA, VI = 7 V, TA=-25 to 85 °C 4.9 Unit VO Output voltage VI Operating input voltage Iout Output current limit ΔVO Line regulation VI = 5.8 to 20 V, IO = 0.5 mA 3.5 17.5 mV ΔVO Load regulation (1) VI = 6 V, IO = 0.
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L4931 Electrical characteristics (Refer to the test circuits, TA = 25 °C, CI = 0.1 µF, CO = 2.2 µF unless otherwise specified). Table 11. L4931Cxx50 electrical characteristics Symbol Parameter Test conditions Min. Typ. Max. IO = 5 mA, VI = 7 V 4.9 5 5.1 IO = 5 mA, VI = 7 V, TA=-25 to 85 °C 4.8 Unit VO Output voltage VI Operating input voltage Iout Output current limit ΔVO Line regulation VI = 5.8 to 20 V, IO = 0.5 mA 3.5 17.5 mV ΔVO Load regulation (1) VI = 6 V, IO = 0.
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Electrical characteristics L4931 (Refer to the test circuits, TA = 25 °C, CI = 0.1 µF, CO = 2.2 µF unless otherwise specified). Table 12. L4931ABxx80 electrical characteristics Symbol Parameter Test conditions Min. Typ. Max. IO = 5 mA, VI = 10 V 7.92 8 8.08 IO = 5 mA, VI = 10 V, TA=-25 to 85 °C 7.84 Unit VO Output voltage VI Operating input voltage Iout Output current limit ΔVO Line regulation VI = 8.8 to 20 V, IO = 0.5 mA 4 20 mV ΔVO Load regulation (1) VI = 9 V, IO = 0.
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L4931 Electrical characteristics (Refer to the test circuits, TA = 25 °C, CI = 0.1 µF, CO = 2.2 µF unless otherwise specified). Table 13. L4931Cxx80 electrical characteristics Symbol Parameter Test conditions Min. Typ. Max. IO = 5 mA, VI = 10 V 7.84 8 8.16 IO = 5 mA, VI = 10 V, TA=-25 to 85 °C 7.68 Unit VO Output voltage VI Operating input voltage Iout Output current limit ΔVO Line regulation VI = 8.9 to 20 V, IO = 0.5 mA 4 24 mV ΔVO Load regulation (1) VI = 9.1 V, IO = 0.
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Electrical characteristics L4931 (Refer to the test circuits, TA = 25 °C, CI = 0.1 µF, CO = 2.2 µF unless otherwise specified). Table 14. L4931ABxx120 electrical characteristics Symbol Parameter Test conditions Min. Typ. Max. IO = 5 mA, VI = 14 V 11.88 12 12.12 IO = 5 mA, VI = 14 V, TA=-25 to 85 °C 11.76 Unit VO Output voltage VI Operating input voltage Iout Output current limit ΔVO Line regulation VI = 12.8 to 20 V, IO = 0.5 mA 4 20 mV ΔVO Load regulation (1) VI = 13 V, IO = 0.
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L4931 Electrical characteristics (Refer to the test circuits, TA = 25 °C, CI = 0.1 µF, CO = 2.2 µF unless otherwise specified). Table 15. L4931Cxx120 electrical characteristics Symbol Parameter Test conditions Min. Typ. Max. IO = 5 mA, VI = 14 V 11.76 12 12.24 IO = 5 mA, VI = 14 V, TA=-25 to 85 °C 11.52 Unit VO Output voltage VI Operating input voltage Iout Output current limit ΔVO Line regulation VI = 12.9 to 20 V, IO = 0.5 mA 4 24 mV ΔVO Load regulation (1) VI = 13.
PAGE 22
Typical application 6 L4931 Typical application Figure 4. Line regulation vs temperature Figure 5. Dropout voltage vs temperature Figure 6. Supply current vs input voltage Figure 7. Supply current vs temperature Figure 8. Short-circuit current vs dropout voltage Figure 9.
PAGE 23
L4931 7 Package mechanical data 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. Table 16. TO-92 mechanical data mm Dim. 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.
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Package mechanical data L4931 Figure 10.
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L4931 Package mechanical data Table 17. PPAK mechanical data mm Dim. Min. Typ. Max. A 2.2 2.4 A1 0.9 1.1 A2 0.03 0.23 B 0.4 0.6 B2 5.2 5.4 C 0.45 0.6 C2 0.48 0.6 D 6 6.2 D1 E 5.1 6.4 6.6 E1 4.7 e 1.27 G 4.9 5.25 G1 2.38 2.7 H 9.35 10.1 L2 0.8 L4 0.6 L5 1 1 L6 2.8 R 0.
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Package mechanical data L4931 Figure 11.
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L4931 Package mechanical data Table 18.DPAK mechanical data mm Dim. Min. Typ. Max. A 2.20 2.40 A1 0.90 1.10 A2 0.03 0.23 b 0.64 0.90 b4 5.20 5.40 c 0.45 0.60 c2 0.48 0.60 D 6.00 6.20 D1 E 5.10 6.40 6.60 E1 4.70 e 2.28 e1 4.40 4.60 H 9.35 10.10 L 1.00 1.50 (L1) 2.80 L2 0.80 L4 0.60 1.00 R V2 0.
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Package mechanical data L4931 Figure 12.
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L4931 Package mechanical data Figure 13. DPAK footprint (a) Footprint_REV_K a. All dimensions are in millimeters.
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Package mechanical data L4931 Table 19. SO-8 mechanical data mm Dim. Min. Typ. A Max. 1.75 A1 0.10 0.25 A2 1.25 b 0.28 0.48 c 0.17 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 k 1.04 0° 8° ccc 0.10 Figure 14.
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L4931 8 Packaging mechanical data Packaging mechanical data Table 20. TO-92 tape and reel mechanical data mm Dim. Min. Typ. A1 4.80 T 3.80 T1 1.60 T2 2.30 d 0.48 Max. Po 12.5 12.9 P2 5.65 7.05 F1, F2 2.44 2.54 2.94 ±2 delta H W 17.5 18.00 W0 5.7 6.3 W1 8.5 9.25 W2 0.50 H 18.50 H0 15.50 18.70 16.50 H1 D0 19 25.00 3.8 4.2 t 0.
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Packaging mechanical data L4931 Figure 15.
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L4931 Packaging mechanical data Table 21. PPAK and DPAK tape and reel mechanical data Tape Reel mm mm Dim. Dim. Min. Max. A0 6.8 7 A B0 10.4 10.6 B 1.5 12.1 C 12.8 1.6 D 20.2 G 16.4 50 B1 Min. Max. 330 13.2 D 1.5 D1 1.5 E 1.65 1.85 N F 7.4 7.6 T K0 2.55 2.75 P0 3.9 4.1 Base qty. 2500 P1 7.9 8.1 Bulk qty. 2500 P2 1.9 2.1 R 40 T 0.25 0.35 W 15.7 16.3 DocID4340 Rev 18 18.4 22.
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Packaging mechanical data L4931 Figure 16. Tape for PPAK and DPAK 10 pitches cumulative tolerance on tape +/- 0.2 mm T P0 Top cover tape P2 D E F B1 W K0 B0 For machine ref. only including draft and radii concentric around B0 A0 P1 D1 User direction of feed R Bending radius User direction of feed AM08852v1 Figure 17. Reel for PPAK and DPAK T REEL DIMENSIONS 40mm min. Access hole At slot location B D C N A Full radius Tape slot in core for tape start 25 mm min.
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L4931 Packaging mechanical data Table 22. SO-8 tape and reel mechanical data mm 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 8.1 Figure 18.
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Ordering information 9 L4931 Ordering information Table 23. Order codes Packages TO-92 PPAK L4931CZ33-AP L4931CZ50-AP L4931CPT50-TR DPAK SO-8 Output voltage (automotive-grade) L4931CD27-TR L4931CD27-TRY 2.7 V L4931CDT33-TR L4931CD33-TR L4931CD33-TRY 3.3 V L4931ABDT33-TR L4931ABD33-TR 3.3 V L4931CD35-TR 3.5 V L4931ABDT35TR L4931ABD35-TR 3.
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L4931 Revision history 10 Revision history Table 24. Document revision history Date Revision 21-Jun-2004 11 Document updating. 14-Jun-2006 12 Order codes updated. 31-Jan-2008 13 Added: Table 1 and new order codes for Automotive grade products. 20-Feb-2008 14 Modified: Table 23 on page 36. 11-Mar-2008 15 Modified: Table 1 on page 1 and Table 23 on page 36. 15-Jul-2008 16 Modified: Table 1 on page 1 and Table 23 on page 36. 18-Aug-2008 17 Modified: Table 23 on page 36.
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L4931 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.