LM2931 SERIES VERY LOW DROP VOLTAGE REGULATOR 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 oC 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 configation (SO-8), fully compatible to the older L78L0 0 family, a shut down Logic Control function is available. This means that when the device is used as a SO-8 TO-92 TO-252 (DPAK) TO-220 local regulator is possible to put a part of the board in stand-by decreasing the total power consumption. Ideal for automotive application the LM2931 is proteceted from reverse battery installations or 2 battery jumps. During the transient, suchs 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. BLOCK DIAGRAM December 1999 1/16 LM2931 SERIES ABSOLUTE MAXIMUM RATINGS Symbol Value Unit V IN DC Positive Input Voltage Parameter 40 V V IN DC Reverse Input Voltage -15 V V IN Transient Input Voltage (τ < 100ms) 60 V V IN Transient Reverse Input Voltage (τ < 100ms) -50 V V I NH Inhibit Input Voltage 40 V IOUT Output Current Internally Limited mA T stg Storage Temperature Range -65 to 150 o C To p Operating Junction Temperature Range -40 to 125 o C Absolute Maximum Ratings are those value beyond which damage to the device may occur. Functional operation under these condition is not implied. CONNECTION DIAGRAM AND ORDERING NUMBERS (top view) TO-220 DPAK BOTTOM VIEW pin 1 = OUT pin 2 = GND pin 3 = IN (*) = N.C. for FIXED and ADJ for ADJUSTABLE SO-8 TO-220 LM2931AV33 LM2931BV33 LM2931AV50 LM2931BV50 DPAK (*) LM2931ADT33 LM2931BDT33 LM2931ADT50 LM2931BDT50 TO-92 TO-92 (*) LM2931AZ33 LM2931BZ33 LM2931AZ50 LM2931BZ50 SO-8 (*) LM2931AD33 LM2931BD33 LM2931AD50 LM2931BD50 LM2931D (*) Available in Tape & Reel with the suffix ”R” for fixed version and ”-R” for adjustable version. 2/16 Output Voltage 3.3V 3.3V 5V 5V 2.5V to 26V LM2931 SERIES APPLICATION CIRCUIT FOR FIXED OUTPUT (Figure 1) APPLICATION CIRCUIT FOR ADJUSTABLE OUTPUT (Figure 2) R1 suggested Value = 27KΩ R1 + R2 VO = VREF x R1 3/16 LM2931 SERIES ELECTRICAL CHARACTERISTICS FOR LM2931A 3.3V (refer to the test circuits, Tj = 25 oC, VIN = 14 V, CIN = 0.1 µF, CO = 100 µF, IO = 10mA, VINH = 0V unless otherwise specified) Symbol Parameter Test Conditions Tj = -40 to 125 oC Min. Typ. 26 37 Max. Unit 3.175 3.3 3.425 V 3.135 3.3 3.465 V 2 10 mV VI Maximum Operating Input Voltage VO Output Voltage VO Output Voltage IO = 100 mA VIN = 6 to 26 V Tj = -40 to 125 oC ∆V O Line Regulation VIN = 9 to 16 V ∆V O Line Regulation VIN = 6 to 26 V 4 33 mV ∆V O Load Regulation IO = 5 to 100 mA 10 33 mV Vd Dropout Voltage (Note 1, 2) IO = 10 mA 90 250 V Vd Dropout Voltage (Note 1, 2) IO = 100 mA 250 600 V Id Quiescent Current ON Mode: IOUT = 100mA 2.5 30 mA Id Quiescent Current OFF Mode: VINH = 2.5 V RLOAD = 330Ω 0.3 1 mA I SC SVR VI L IO = 10 mA Short Circuit Current VIN = 14 ± 2V Tj = -40 to 125 oC Supply Voltage Rejection IO = 100 mA f = 120 Hz Control Input Voltage Tj = -40 to 125 oC o V 100 300 mA 55 78 dB 2 1.2 V V IH Control Input Voltage Tj = -40 to 125 C I INH Inhibit Input Current VINH = 2.5 V V IN Transient Input Voltage RLOAD = 330Ω τ < 100ms 60 70 V V IN Reverse Polarity Input Voltage VO ± 0.3V RLOAD = 330Ω -15 -50 V V IN Reverse Polarity Input Voltage Transient RLOAD = 330Ω τ < 100ms -50 eN Output Noise Voltage B = 10Hz to 100KHz 3.25 Note 1: Reference Voltage is measured from VOUT to AJD pin. Note 2: Vd measured when the output voltage has dropped 100mV from the nominal value obtained at 14V. 4/16 2 22 V 50 µA V 330 µV RMS LM2931 SERIES ELECTRICAL CHARACTERISTICS FOR LM2931B 3.3V (refer to the test circuits, Tj = 25 oC, VIN = 14 V, CIN = 0.1 µF, CO = 100 µF, IO = 10mA, VINH = 0V unless otherwise specified) Symbol Parameter Test Conditions Tj = -40 to 125 oC Min. Typ. 26 37 Max. Unit 3.135 3.3 3.465 V 2.97 3.3 3.63 V 2 10 mV VI Maximum Operating Input Voltage VO Output Voltage VO Output Voltage IO = 100 mA VIN = 6 to 26 V Tj = -40 to 125 oC ∆V O Line Regulation VIN = 9 to 16 V ∆V O Line Regulation VIN = 6 to 26 V 4 33 mV ∆V O Load Regulation IO = 5 to 100 mA 10 33 mV Vd Dropout Voltage (Note 1, 2) IO = 10 mA 90 200 V Vd Dropout Voltage (Note 1, 2) IO = 100 mA 250 600 V Id Quiescent Current ON Mode: IOUT = 100mA 2.5 30 mA Id Quiescent Current OFF Mode: VINH = 2.5 V RLOAD = 330Ω 0.3 1 mA I SC SVR VI L IO = 10 mA Short Circuit Current VIN = 14 ± 2V Tj = -40 to 125 oC Supply Voltage Rejection IO = 100 mA f = 120 Hz Control Input Voltage Tj = -40 to 125 oC o V 100 300 mA 55 78 dB 2 1.2 V V IH Control Input Voltage Tj = -40 to 125 C I INH Inhibit Input Current VINH = 2.5 V V IN Transient Input Voltage RLOAD = 330Ω τ < 100ms 60 70 V V IN Reverse Polarity Input Voltage VO ± 0.3V RLOAD = 330Ω -15 -50 V V IN Reverse Polarity Input Voltage Transient RLOAD = 330Ω τ < 100ms -50 eN Output Noise Voltage B = 10Hz to 100KHz 3.25 2 22 V 50 µA V 330 µV RMS Note 1: Reference Voltage is measured from VOUT to AJD pin. Note 2: Vd measured when the output voltage has dropped 100mV from the nominal value obtained at 14V. 5/16 LM2931 SERIES ELECTRICAL CHARACTERISTICS FOR LM2931A 5V (refer to the test circuits, Tj = 25 oC, VIN = 14 V, CIN = 0.1 µF, CO = 100 µF, IO = 10mA, VINH = 0V unless otherwise specified) Symbol Parameter Test Conditions Tj = -40 to 125 oC Min. Typ. 26 37 Max. Unit 4.81 5 5.19 V 4.75 5 5.25 V 2 10 mV VI Maximum Operating Input Voltage VO Output Voltage VO Output Voltage IO = 100 mA VIN = 6 to 26 V Tj = -40 to 125 oC ∆V O Line Regulation VIN = 9 to 16 V ∆V O Line Regulation VIN = 6 to 26 V 4 30 mV ∆V O Load Regulation IO = 5 to 100 mA 15 50 mV Vd Dropout Voltage (Note 1, 2) IO = 10 mA 90 200 V Vd Dropout Voltage (Note 1, 2) IO = 100 mA 250 600 V Id Quiescent Current ON Mode: IOUT = 100mA 2.5 30 mA Id Quiescent Current OFF Mode: VINH = 2.5 V RLOAD = 500Ω 0.3 1 mA I SC SVR VI L IO = 10 mA Short Circuit Current VIN = 14 ± 2V Tj = -40 to 125 oC Supply Voltage Rejection IO = 100 mA f = 120 Hz Control Input Voltage Tj = -40 to 125 oC o V 100 300 mA 55 75 dB 2 1.2 V V IH Control Input Voltage Tj = -40 to 125 C I INH Inhibit Input Current VINH = 2.5 V V IN Transient Input Voltage RLOAD = 500Ω τ < 100ms 60 70 V V IN Reverse Polarity Input Voltage VO ± 0.3V RLOAD = 500Ω -15 -50 V V IN Reverse Polarity Input Voltage Transient RLOAD = 500Ω τ < 100ms -50 eN Output Noise Voltage B = 10Hz to 100KHz 3.25 Note 1: Reference Voltage is measured from VOUT to AJD pin. Note 2: Vd measured when the output voltage has dropped 100mV from the nominal value obtained at 14V. 6/16 2 22 V 50 µA V 500 µV RMS LM2931 SERIES ELECTRICAL CHARACTERISTICS FOR LM2931B 5V (refer to the test circuits, Tj = 25 oC, VIN = 14 V, CIN = 0.1 µF, CO = 100 µF, IO = 10mA, VINH = 0V unless otherwise specified) Symbol Parameter Test Conditions Tj = -40 to 125 oC Min. Typ. 26 37 Max. Unit 4.75 5 5.25 V 4.5 5 5.5 V 2 10 mV VI Maximum Operating Input Voltage VO Output Voltage VO Output Voltage IO = 100 mA VIN = 6 to 26 V Tj = -40 to 125 oC ∆V O Line Regulation VIN = 9 to 16 V ∆V O Line Regulation VIN = 6 to 26 V 4 30 mV ∆V O Load Regulation IO = 5 to 100 mA 15 50 mV Vd Dropout Voltage (Note 1, 2) IO = 10 mA 90 200 V Vd Dropout Voltage (Note 1, 2) IO = 100 mA 250 600 V Id Quiescent Current ON Mode: IOUT = 100mA 2.5 30 mA Id Quiescent Current OFF Mode: VINH = 2.5 V RLOAD = 330Ω 0.3 1 mA I SC SVR VI L IO = 10 mA Short Circuit Current VIN = 14 ± 2V Tj = -40 to 125 oC Supply Voltage Rejection IO = 100 mA f = 120 Hz Control Input Voltage Tj = -40 to 125 oC o V 100 300 mA 55 75 dB 2 1.2 V V IH Control Input Voltage Tj = -40 to 125 C I INH Inhibit Input Current VINH = 2.5 V V IN Transient Input Voltage RLOAD = 500Ω τ < 100ms 60 70 V V IN Reverse Polarity Input Voltage VO ± 0.3V RLOAD = 500Ω -15 -50 V V IN Reverse Polarity Input Voltage Transient RLOAD = 500Ω τ < 100ms -50 eN Output Noise Voltage B = 10Hz to 100KHz 3.25 2 22 V 50 µA V 500 µV RMS Note 1: Reference Voltage is measured from VOUT to AJD pin. Note 2: Vd measured when the output voltage has dropped 100mV from the nominal value obtained at 14V. 7/16 LM2931 SERIES ELECTRICAL CHARACTERISTICS FOR LM2931ADJ (refer to the test circuits figure 2 with R1 =27KΩ and R2 =40.5KΩ, Tj = 25 oC, VIN = 14 V, CIN = 0.1 µF, CO = 100 µF, IO = 10mA, VINH = 0V unless otherwise specified) Symbol Parameter VI Maximum Operating Input Voltage V REF Reference Voltage(Note 1) Test Conditions Tj = -40 to 125 oC IO = 10 mA o Min. Typ. 26 37 Max. 1.14 1.2 1.26 Unit V V V REF Reference Voltage(Note 1) IO = 100 mA 1.2 1.32 V ∆V O Line Regulation VIN = 3.6 to 26 V 0.6 4.5 mV ∆V O Load Regulation IO = 5 to 100 mA 9 30 mV Vd Dropout Voltage (Note 1, 2) IO = 10 mA 90 200 V Vd Dropout Voltage (Note 1, 2) IO = 100 mA 250 600 V Id Quiescent Current ON Mode: IOUT = 100mA 2.5 30 mA Id Quiescent Current OFF Mode: VINH = 2.5 V RLOAD = 300Ω 0.3 1 mA I SC SVR VI L Tj = -40 to 125 C Short Circuit Current VIN = 14 ± 2V Tj = -40 to 125 oC Supply Voltage Rejection IO = 100 mA f = 120 Hz Control Input Voltage Tj = -40 to 125 oC o 1.08 100 300 mA 55 80 dB 2 1.2 V V IH Control Input Voltage Tj = -40 to 125 C I INH Inhibit Input Current VINH = 2.5 V V IN Transient Input Voltage RLOAD = 300Ω τ < 100ms 60 70 V V IN Reverse Polarity Input Voltage VO ± 0.3V RLOAD = 300Ω -15 -50 V V IN Reverse Polarity Input Voltage Transient RLOAD = 300Ω τ < 100ms -50 eN Output Noise Voltage B = 10Hz to 100KHz 3.25 Note 1: Reference Voltage is measured from VOUT to AJD pin. Note 2: Vd measured when the output voltage has dropped 100mV from the nominal value obtained at 14V. 8/16 2 22 V 50 µA V 330 µV RMS LM2931 SERIES TYPICAL CHARACTERISTICS (unless otherwise specified CIN=0.1µF, CO=100µF) Output Voltage vs Temperature Output Voltage vs Temperature Referece Voltage vs Temperature Line Regulation vs Temperature Load Regulation vs Temperature Dropout Voltage vs Temperature 9/16 LM2931 SERIES TYPICAL CHARACTERISTICS (Continued) Dropout Voltage vs Temperature Dropout Voltage vs Output Current Output Voltage vs Input Voltage Short Circuit Current vs Drop Voltage Quiescent Current vs Temperature Quiescent Current vs Input Voltage 10/16 LM2931 SERIES TYPICAL CHARACTERISTICS (Continued) Quiescent Current vs Output Current Supply Voltage Rejection vs Temperature Supply Voltage Rejection vs Frequency Supply Voltage Rejection vs Output Current Line Transient Load Transient 11/16 LM2931 SERIES TO-220 MECHANICAL DATA mm DIM. MIN. inch TYP. 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 D1 0.107 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 14.0 0.511 L2 16.4 L4 0.645 13.0 0.551 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 D1 C D A E L5 H2 G G1 F1 L2 F2 F Dia. L5 L9 L7 L6 12/16 L4 P011C LM2931 SERIES TO-252 (DPAK) MECHANICAL DATA mm DIM. MIN. inch TYP. MAX. MIN. TYP. MAX. A 2.2 2.4 0.086 0.094 A1 0.9 1.1 0.035 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 0.244 E 6.4 6.6 0.252 0.260 G 4.4 4.6 0.173 0.181 H 9.35 10.1 0.368 0.397 L2 0.8 L4 0.031 0.6 1 0.023 0.039 A1 C2 A H A2 C DETAIL ”A” L2 D = 1 = G 2 = = = E = B2 3 B DETAIL ”A” L4 0068772-B 13/16 LM2931 SERIES SO-8 MECHANICAL DATA mm DIM. MIN. TYP. A a1 inch MAX. MIN. TYP. 1.75 0.1 0.068 0.25 a2 MAX. 0.003 0.009 1.65 0.064 a3 0.65 0.85 0.025 0.033 b 0.35 0.48 0.013 0.018 b1 0.19 0.25 0.007 0.010 C 0.25 0.5 0.010 0.019 c1 45 (typ.) D 4.8 5.0 0.188 0.196 E 5.8 6.2 0.228 0.244 e 1.27 0.050 e3 3.81 0.150 F 3.8 4.0 0.14 0.157 L 0.4 1.27 0.015 0.050 M S 0.6 0.023 8 (max.) 0016023 14/16 LM2931 SERIES TO-92 MECHANICAL DATA mm inch DIM. MIN. TYP. MAX. MIN. TYP. MAX. A 4.58 5.33 0.180 0.210 B 4.45 5.2 0.175 0.204 C 3.2 4.2 0.126 0.165 D 12.7 E 0.500 1.27 F 0.4 G 0.35 0.050 0.51 0.016 0.020 0.14 15/16 LM2931 SERIES Information furnished is believed to be accurate and reliable. However, STMicroelectronic s 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. Specification 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 withoutexpress written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics 1999 STMicroelectronics – Printed in Italy – All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - China - Finland - France - Germany - Hong Kong - India - Italy - Japan - Malaysia - Malta - Morocco Singapore - Spain - Sweden - Switzerland - United Kingdom - U.S.A. http://www.st.com . 16/16