LM2931 SERIES VERY LOW DROP VOLTAGE REGULATORS WITH INHIBIT FUNCTION ■ ■ ■ ■ ■ ■ ■ ■ ■ VERY LOW DROPOUT VOLTAGE (0.15V TYP. AT 10mA LOAD) LOW QUIESCENT CURRENT (TYP. 2.5mA, AT 100mA LOAD) OUTPUT CURRENT UP TO 100mA ADJUSTABLE (FROM VOUT = 2.5V ONLY SO-8) AND FIXED (3.3V & 5V) OUTPUT VOLTAGE VERSION INTERNAL CURRENT AND THERMAL LIMIT LOAD DUMP PROTECTION UP TO 60V REVERSE TRANSIENT PROTECTION UP TO -50V TEMPERATURE RANGE: -40 TO 125°C PACKAGE AVAILABLE: TO-92, DPAK, TO-220, SO-8 (WITH INHIBIT CONTROL) DESCRIPTION The LM2931 series are very low drop regulators. The very low drop voltage and the low quiescent current make them particular suitable for low noise, low power applications and in battery powered systems. In the 8 pin configuration (SO-8), fully compatible to the older L78L00 family, a shut down Logic Control function is available. This means that when the device is used as a local regulator is possible to put a part of the board TO-220 TO-92 DPAK SO-8 in stand-by decreasing the total power consumption. Ideal for automotive application the LM2931 is protected from reverse battery installations or 2 battery jumps. During the transient, such as a a load dump (60V) when the input voltage can exceed the specified maximum operating input voltage (26V), the regulator will automatically shut down to protect both internal circuit and the load. SCHEMATIC DIAGRAM March 2004 1/19 LM2931 SERIES ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit VI DC Positive Input Voltage 40 V VI DC Reverse Input Voltage -15 V VI Transient Input Voltage (τ < 100ms) 60 V VI Transient Reverse Input Voltage (τ < 100ms) -50 V 40 V VINH Inhibit Input Voltage Output Current IO Internally Limited Tstg Storage Temperature Range -65 to 150 °C Top Operating Junction Temperature Range -40 to 125 °C Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied. THERMAL DATA Symbol Parameter TO-220 SO-8 DPAK Rthj-case Thermal Resistance Junction-case 3 20 8 Rthj-amb Thermal Resistance Junction-ambient 50 55(*) 100 TO-92 Unit °C/W 200 °C/W 2 (*) Considering 6 cm of copper board heat-sink CONNECTION DIAGRAM (top view) TO-220 (*) = N.C. for FIXED and ADJ for ADJUSTABLE SO-8 PIN 1 = VOUT PIN 2 = GND PIN 3 = VIN BOTTOM VIEW TO-92 DPAK ORDERING CODES TO-220 DPAK (*) TO-92 (*) SO-8 (*) OUTPUT VOLTAGE LM2931AV33 LM2931BV33 LM2931AV50 LM2931BV50 LM2931ADT33 LM2931BDT33 LM2931ADT50 LM2931BDT50 LM2931AZ33 LM2931BZ33 LM2931AZ50 LM2931BZ50 LM2931AD33 LM2931BD33 LM2931AD50 LM2931BD50 LM2931D 3.3 V 3.3 V 5.0 V 5.0 V 2.5 to 26 V (*) Available in Tape & Reel with the suffix "R" for fixed version and "-R" for adjustable version. 2/19 LM2931 SERIES APPLICATION CIRCUIT FOR FIXED OUTPUT APPLICATION CIRCUIT FOR ADJUSTABLE OUTPUT R1 suggested Value = 27KΩ VO = VREF (R1 + R2)/R1. 3/19 LM2931 SERIES ELECTRICAL CHARACTERISTICS OF LM2931A 3.3V (refer to the test circuits, TJ = 25°C, CI = 0.1 µF, C O = 100 µF, VI = 14V, IO = 10mA, VINH = 0V, unless otherwise specified). Symbol VI Parameter Test Conditions Typ. Max. Unit 26 37 3.135 3.3 3.425 V 3.135 3.3 3.465 V mV IO = 10 mA VO Maximum Operating Input Voltage Output Voltage VO Output Voltage IO = 100 mA VI = 6 to 26 V TJ = -40 to 125°C ∆VO Line Regulation VI = 9 to 16 V 2 10 VI = 6 to 26 V 4 33 IO = 5 to 100 mA 10 33 mV 90 250 mV 250 600 2.5 30 0.3 1 ∆VO Load Regulation Vd Dropout Voltage (Note 1, 2) IO = 10 mA IO = 100 mA Id Quiescent Current ON MODE OFF MODE ISC TJ = -40 to 125°C Min. IO = 100 mA VINH = 2.5 V RLOAD = 330 Ω Short Circuit Current V mA mA 100 300 mA 55 78 dB SVR Supply Voltage Rejection IO = 100 mA, f = 120 Hz, VIL Control Input Voltage Low TJ = -40 to 125°C VIH Control Input Voltage High TJ = -40 to 125°C IINH Inhibit Input Current VINH = 2.5 V VI Transient Input Voltage RLOAD = 330 Ω τ < 100ms 60 70 V VI Reverse Polarity Input Voltage Reverse Polarity Input Voltage Transient Output Noise Voltage VO = ± 0.3 V RLOAD = 330 Ω -15 -50 V RLOAD = 330 Ω τ < 100ms -50 VI eN VI = 14 ± 2 V TJ = -40 to 125°C 2 3.25 Note 1: Reference Voltage is measured from VOUT to ADJ pin. Note 2: Vd measured when the output voltage has dropped 100mV from the nominal value obtained at 14V. 4/19 V 50 µA 2 22 B =10 Hz to 100 KHz 1.2 V V 330 µVRMS LM2931 SERIES ELECTRICAL CHARACTERISTICS OF LM2931B 3.3V (refer to the test circuits, TJ = 25°C, CI = 0.1 µF, C O = 100 µF, VI = 14V, IO = 10mA, VINH = 0V, unless otherwise specified). Symbol VI Parameter Test Conditions Typ. Max. Unit 26 37 3.135 3.3 3.465 V 2.97 3.3 3.63 V mV IO = 10 mA VO Maximum Operating Input Voltage Output Voltage VO Output Voltage IO = 100 mA VI = 6 to 26 V TJ = -40 to 125°C ∆VO Line Regulation VI = 9 to 16 V 2 10 VI = 6 to 26 V 4 33 IO = 5 to 100 mA 10 33 mV 90 200 mV 250 600 2.5 30 0.3 1 ∆VO Load Regulation Vd Dropout Voltage (Note 1, 2) IO = 10 mA IO = 100 mA Id Quiescent Current ON MODE OFF MODE ISC TJ = -40 to 125°C Min. IO = 100 mA VINH = 2.5 V RLOAD = 330 Ω Short Circuit Current V mA mA 100 300 mA 55 78 dB SVR Supply Voltage Rejection IO = 100 mA, f = 120 Hz, VIL Control Input Voltage Low TJ = -40 to 125°C VIH Control Input Voltage High TJ = -40 to 125°C IINH Inhibit Input Current VINH = 2.5 V VI Transient Input Voltage RLOAD = 330 Ω τ < 100ms 60 70 V VI Reverse Polarity Input Voltage Reverse Polarity Input Voltage Transient Output Noise Voltage VO = ± 0.3 V RLOAD = 330 Ω -15 -50 V RLOAD = 330 Ω τ < 100ms -50 VI eN VI = 14 ± 2 V TJ = -40 to 125°C 2 3.25 V 50 µA 2 22 B =10 Hz to 100 KHz 1.2 V V 330 µVRMS Note 1: Reference Voltage is measured from VOUT to ADJ pin. Note 2: Vd measured when the output voltage has dropped 100mV from the nominal value obtained at 14V. 5/19 LM2931 SERIES ELECTRICAL CHARACTERISTICS OF LM2931A 5V (refer to the test circuits, TJ = 25°C, CI = 0.1 µF, C O = 100 µF, VI = 14V, IO = 10mA, VINH = 0V, unless otherwise specified). Symbol VI Parameter Test Conditions Typ. Max. Unit 26 37 4.81 5 5.19 V 4.75 5 5.25 V mV IO = 10 mA VO Maximum Operating Input Voltage Output Voltage VO Output Voltage IO = 100 mA VI = 6 to 26 V TJ = -40 to 125°C ∆VO Line Regulation VI = 9 to 16 V 2 10 VI = 6 to 26 V 4 30 IO = 5 to 100 mA 15 50 mV 90 200 mV 250 600 2.5 30 0.3 1 ∆VO Load Regulation Vd Dropout Voltage (Note 1, 2) IO = 10 mA IO = 100 mA Id Quiescent Current ON MODE OFF MODE ISC TJ = -40 to 125°C Min. IO = 100 mA VINH = 2.5 V RLOAD = 500 Ω Short Circuit Current V mA mA 100 300 mA 55 75 dB SVR Supply Voltage Rejection IO = 100 mA, f = 120 Hz, VIL Control Input Voltage Low TJ = -40 to 125°C VIH Control Input Voltage High TJ = -40 to 125°C IINH Inhibit Input Current VINH = 2.5 V VI Transient Input Voltage RLOAD = 500 Ω τ < 100ms 60 70 V VI Reverse Polarity Input Voltage Reverse Polarity Input Voltage Transient Output Noise Voltage VO = ± 0.3 V RLOAD = 500 Ω -15 -50 V RLOAD = 500 Ω τ < 100ms -50 VI eN VI = 14 ± 2 V TJ = -40 to 125°C 2 3.25 Note 1: Reference Voltage is measured from VOUT to ADJ pin. Note 2: Vd measured when the output voltage has dropped 100mV from the nominal value obtained at 14V. 6/19 V 50 µA 2 22 B =10 Hz to 100 KHz 1.2 V V 500 µVRMS LM2931 SERIES ELECTRICAL CHARACTERISTICS OF LM2931B 5V (refer to the test circuits, TJ = 25°C, CI = 0.1 µF, C O = 100 µF, VI = 14V, IO = 10mA, VINH = 0V, unless otherwise specified). Symbol VI Parameter Test Conditions Typ. Max. Unit 26 37 4.75 5 5.25 V 4.5 5 5.5 V mV IO = 10 mA VO Maximum Operating Input Voltage Output Voltage VO Output Voltage IO = 100 mA VI = 6 to 26 V TJ = -40 to 125°C ∆VO Line Regulation VI = 9 to 16 V 2 10 VI = 6 to 26 V 4 30 IO = 5 to 100 mA 15 50 mV 90 200 mV 250 600 2.5 30 0.3 1 ∆VO Load Regulation Vd Dropout Voltage (Note 1, 2) IO = 10 mA IO = 100 mA Id Quiescent Current ON MODE OFF MODE ISC TJ = -40 to 125°C Min. IO = 100 mA VINH = 2.5 V RLOAD = 500 Ω Short Circuit Current V mA mA 100 300 mA 55 75 dB SVR Supply Voltage Rejection IO = 100 mA, f = 120 Hz, VIL Control Input Voltage Low TJ = -40 to 125°C VIH Control Input Voltage High TJ = -40 to 125°C IINH Inhibit Input Current VINH = 2.5 V VI Transient Input Voltage RLOAD = 500 Ω τ < 100ms 60 70 V VI Reverse Polarity Input Voltage Reverse Polarity Input Voltage Transient Output Noise Voltage VO = ± 0.3 V RLOAD = 500 Ω -15 -50 V RLOAD = 500 Ω τ < 100ms -50 VI eN VI = 14 ± 2 V TJ = -40 to 125°C 2 3.25 V 50 µA 2 22 B =10 Hz to 100 KHz 1.2 V V 500 µVRMS Note 1: Reference Voltage is measured from VOUT to ADJ pin. Note 2: Vd measured when the output voltage has dropped 100mV from the nominal value obtained at 14V. 7/19 LM2931 SERIES ELECTRICAL CHARACTERISTICS OF LM2931ADJ (refer to the test circuits figure 2 with R1 = 27KΩ and R2 = 40.5KΩ, TJ = 25°C, CI = 0.1 µF, CO = 100 µF, VI = 14V, IO = 10mA, VINH = 0V, unless otherwise specified). Symbol VI Parameter Test Conditions TJ = -40 to 125°C VREF Maximum Operating Input IO = 10 mA Voltage Reference Voltage (Note 1) VREF Reference Voltage (Note 1) IO = 100 mA TJ = -40 to 125°C ∆VO Line Regulation VI = 3.6 to 26 V ∆VO Load Regulation IO = 5 to 100 mA Vd Id ISC Min. Typ. 26 37 1.14 1.2 1.26 V 1.08 1.2 1.32 V 0.6 4.5 mV 9 30 mV mV Dropout Voltage (Note 1, 2) IO = 10 mA Quiescent Current ON MODE OFF MODE Max. Unit V 90 200 IO = 100 mA 250 600 IO = 100 mA 2.5 30 mA 0.3 1 mA VINH = 2.5 V RLOAD = 300 Ω VI = 14 ± 2 V TJ = -40 to 125°C Short Circuit Current SVR Supply Voltage Rejection IO = 100 mA f = 120 Hz VIL Control Input Voltage Low TJ = -40 to 125°C VIH Control Input Voltage High TJ = -40 to 125°C IINH 100 300 mA 55 80 dB 3.25 2 2 V V Inhibit Input Current VINH = 2.5 V VI Transient Input Voltage RLOAD = 300 Ω τ < 100ms 60 70 V VI Reverse Polarity Input Voltage Reverse Polarity Input Voltage Transient Output Noise Voltage VO = ± 0.3 V RLOAD = 300 Ω -15 -50 V RLOAD = 300 Ω τ < 100ms -50 VI eN 22 1.2 B =10 Hz to 100 KHz Note 1: Reference Voltage is measured from VOUT to ADJ pin. Note 2: Vd measured when the output voltage has dropped 100mV from the nominal value obtained at 14V. 8/19 50 µA V 330 µVRMS LM2931 SERIES TYPICAL CHARACTERISTICS (unless otherwise specified CI = 0.1 µF, CO = 100 µF). Figure 1 : Output Voltage vs Temperature Figure 4 : Line Regulation vs Temperature Figure 2 : Output Voltage vs Temperature Figure 5 : Load Regulation vs Temperature Figure 3 : Reference Voltage vs Temperature Figure 6 : Dropout Voltage vs Temperature 9/19 LM2931 SERIES Figure 7 : Dropout Voltage vs Temperature Figure 10 : Short Circuit Current vs Drop Voltage Figure 8 : Dropout Voltage vs Output Current Figure 11 : Quiescent Current vs Temperature Figure 9 : Output Voltage vs Input Voltage Figure 12 : Quiescent Current vs Input Voltage 10/19 LM2931 SERIES Figure 13 : Quiescent Current vs Output Current Figure 16 : Supply Voltage Rejection vs Output Current Figure 14 : Supply Voltage Rejection vs Temperature Figure 17 : Stability vs CO Figure 15 : Supply Voltage Rejection vs Frequency Figure 18 : Line Transient VI = 6 to 20 V, RL = 500Ω, T J = 25°C, C I = 0, CO = 100µF, Rise Fall-Time = 200 ns 11/19 LM2931 SERIES Figure 19 : Load Transient VI = 14 V, IO = 100mA, T J = 25°C, CI = 0.1µF, CO = 100µF, Rise Time = 500ns, Fall-Time = 1µs 12/19 LM2931 SERIES TO-220 MECHANICAL DATA DIM. mm. MIN. TYP inch MAX. MIN. TYP. MAX. A 4.40 4.60 0.173 0.181 C 1.23 1.32 0.048 0.051 D 2.40 2.72 0.094 0.107 D1 1.27 0.050 E 0.49 0.70 0.019 0.027 F 0.61 0.88 0.024 0.034 F1 1.14 1.70 0.044 0.067 F2 1.14 1.70 0.044 0.067 G 4.95 5.15 0.194 0.203 G1 2.4 2.7 0.094 0.106 H2 10.0 10.40 0.393 0.409 L2 16.4 0.645 L4 13.0 14.0 0.511 0.551 L5 2.65 2.95 0.104 0.116 L6 15.25 15.75 0.600 0.620 L7 6.2 6.6 0.244 0.260 L9 3.5 3.93 0.137 0.154 DIA. 3.75 3.85 0.147 0.151 P011C 13/19 LM2931 SERIES TO-92 MECHANICA 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 22.0 0102782/C 14/19 LM2931 SERIES 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 0.04 0016023/C 15/19 LM2931 SERIES DPAK MECHANICAL DATA mm. inch DIM. MIN. TYP MAX. MIN. TYP. MAX. A 2.2 2.4 0.086 A1 0.9 1.1 0.035 0.094 0.043 A2 0.03 0.23 0.001 0.009 B 0.64 0.9 0.025 0.035 B2 5.2 5.4 0.204 0.212 C 0.45 0.6 0.017 0.023 C2 0.48 0.6 0.019 0.023 D 6 6.2 0.236 D1 E 5.1 6.4 0.244 0.200 6.6 0.252 0.260 E1 4.7 0.185 e 2.28 0.090 e1 4.4 4.6 0.173 0.181 H 9.35 10.1 0.368 0.397 L (L1) L2 L4 1 0.039 2.8 0.110 0.8 0.6 0.031 1 0.023 0.039 0068772-F 16/19 LM2931 SERIES Tape & Reel DPAK-PPAK MECHANICAL DATA mm. inch DIM. MIN. TYP A MAX. MIN. TYP. 330 13.0 12.992 C 12.8 D 20.2 0.795 N 60 2.362 T 13.2 MAX. 0.504 0.512 22.4 0.519 0.882 Ao 6.80 6.90 7.00 0.268 0.272 0.2.76 Bo 10.40 10.50 10.60 0.409 0.413 0.417 Ko 2.55 2.65 2.75 0.100 0.104 0.105 Po 3.9 4.0 4.1 0.153 0.157 0.161 P 7.9 8.0 8.1 0.311 0.315 0.319 17/19 LM2931 SERIES 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 18/19 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 0.319 LM2931 SERIES Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics All other names are the property of their respective owners © 2004 STMicroelectronics - All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States. http://www.st.com 19/19