VERY LOW DROP VOLTAGE REGULATOR WITH INHIBIT FUNCTION

® LM2931 SERIES VERY LOW DROP VOLTAGE REGULATOR WITH INHIBIT FUNCTION s s s s s s s s s 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) SO-8 TO-92 TO-252 (DPAK) TO-220 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 BLOCK DIAGRAM 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. December 1999 1/16 LM2931 SERIES ABSOLUTE MAXIMUM RATINGS Symbol V IN V IN V IN V IN V I NH IOUT T stg To p DC Positive Input Voltage DC Reverse Input Voltage Transient Input Voltage (τ < 100ms) Transient Reverse Input Voltage (τ < 100ms) Inhibit Input Voltage Output Current Storage Temperature Range Operating Junction Temperature Range Parameter Value 40 -15 60 -50 40 Internally Limited -65 to 150 -40 to 125 Unit V V V V V mA o o C 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 (*) = N.C. for FIXED and ADJ for ADJUSTABLE pin 1 = OUT pin 2 = GND pin 3 = IN SO-8 TO-220 LM2931AV33 LM2931BV33 LM2931AV50 LM2931BV50 DPAK (*) LM2931ADT33 LM2931BDT33 LM2931ADT50 LM2931BDT50 TO-92 (*) LM2931AZ33 LM2931BZ33 LM2931AZ50 LM2931BZ50 TO-92 SO-8 (*) LM2931AD33 LM2931BD33 LM2931AD50 LM2931BD50 LM2931D Output Voltage 3.3V 3.3V 5V 5V 2.5V to 26V (*) Available in Tape & Reel with the suffix ”R” for fixed version and ”-R” for adjustable version. 2/16 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 VI VO VO ∆V O ∆V O ∆V O Vd Vd Id Id I SC SVR VI L V IH I INH V IN V IN V IN eN Parameter Maximum Operating Input Voltage Output Voltage Output Voltage Line Regulation Line Regulation Load Regulation Dropout Voltage (Note 1, 2) Dropout Voltage (Note 1, 2) Quiescent Current Quiescent Current Short Circuit Current Supply Voltage Rejection Control Input Voltage Control Input Voltage Inhibit Input Current Transient Input Voltage Reverse Polarity Input Voltage Reverse Polarity Input Voltage Transient Output Noise Voltage IO = 100 mA f = 120 Hz VIN = 14 ± 2V Tj = -40 to 125 oC o Test Conditions IO = 10 mA Tj = -40 to 125 oC Min. 26 3.175 Typ. 37 3.3 3.3 2 4 10 90 250 2.5 0.3 Max. Unit V 3.425 3.465 10 33 33 250 600 30 1 V V mV mV mV V V mA mA mA dB IO = 100 mA VIN = 6 to 26 V Tj = -40 to 125 oC VIN = 9 to 16 V VIN = 6 to 26 V IO = 5 to 100 mA IO = 10 mA IO = 100 mA ON Mode: IOUT = 100mA OFF Mode: VINH = 2.5 V RLOAD = 330Ω 3.135 100 55 300 78 2 1.2 50 Tj = -40 to 125 oC Tj = -40 to 125 C VINH = 2.5 V RLOAD = 330Ω VO ± 0.3V RLOAD = 330Ω τ < 100ms RLOAD = 330Ω τ < 100ms 60 -15 -50 3.25 V V µA V V V 2 22 70 -50 B = 10Hz to 100KHz 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. 4/16 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 VI VO VO ∆V O ∆V O ∆V O Vd Vd Id Id I SC SVR VI L V IH I INH V IN V IN V IN eN Parameter Maximum Operating Input Voltage Output Voltage Output Voltage Line Regulation Line Regulation Load Regulation Dropout Voltage (Note 1, 2) Dropout Voltage (Note 1, 2) Quiescent Current Quiescent Current Short Circuit Current Supply Voltage Rejection Control Input Voltage Control Input Voltage Inhibit Input Current Transient Input Voltage Reverse Polarity Input Voltage Reverse Polarity Input Voltage Transient Output Noise Voltage IO = 100 mA f = 120 Hz VIN = 14 ± 2V Tj = -40 to 125 oC o Test Conditions IO = 10 mA Tj = -40 to 125 oC Min. 26 3.135 Typ. 37 3.3 3.3 2 4 10 90 250 2.5 0.3 Max. Unit V 3.465 3.63 10 33 33 200 600 30 1 V V mV mV mV V V mA mA mA dB IO = 100 mA VIN = 6 to 26 V Tj = -40 to 125 oC VIN = 9 to 16 V VIN = 6 to 26 V IO = 5 to 100 mA IO = 10 mA IO = 100 mA ON Mode: IOUT = 100mA OFF Mode: VINH = 2.5 V RLOAD = 330Ω 2.97 100 55 300 78 2 1.2 50 Tj = -40 to 125 oC Tj = -40 to 125 C VINH = 2.5 V RLOAD = 330Ω VO ± 0.3V RLOAD = 330Ω τ < 100ms RLOAD = 330Ω τ < 100ms 60 -15 -50 3.25 V V µA V V V 2 22 70 -50 B = 10Hz to 100KHz 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 VI VO VO ∆V O ∆V O ∆V O Vd Vd Id Id I SC SVR VI L V IH I INH V IN V IN V IN eN Parameter Maximum Operating Input Voltage Output Voltage Output Voltage Line Regulation Line Regulation Load Regulation Dropout Voltage (Note 1, 2) Dropout Voltage (Note 1, 2) Quiescent Current Quiescent Current Short Circuit Current Supply Voltage Rejection Control Input Voltage Control Input Voltage Inhibit Input Current Transient Input Voltage Reverse Polarity Input Voltage Reverse Polarity Input Voltage Transient Output Noise Voltage IO = 100 mA f = 120 Hz VIN = 14 ± 2V Tj = -40 to 125 oC o Test Conditions IO = 10 mA Tj = -40 to 125 oC Min. 26 4.81 Typ. 37 5 5 2 4 15 90 250 2.5 0.3 Max. Unit V 5.19 5.25 10 30 50 200 600 30 1 V V mV mV mV V V mA mA mA dB IO = 100 mA VIN = 6 to 26 V Tj = -40 to 125 oC VIN = 9 to 16 V VIN = 6 to 26 V IO = 5 to 100 mA IO = 10 mA IO = 100 mA ON Mode: IOUT = 100mA OFF Mode: VINH = 2.5 V RLOAD = 500Ω 4.75 100 55 300 75 2 1.2 50 Tj = -40 to 125 oC Tj = -40 to 125 C VINH = 2.5 V RLOAD = 500Ω VO ± 0.3V RLOAD = 500Ω τ < 100ms RLOAD = 500Ω τ < 100ms 60 -15 -50 3.25 V V µA V V V 2 22 70 -50 B = 10Hz to 100KHz 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. 6/16 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 VI VO VO ∆V O ∆V O ∆V O Vd Vd Id Id I SC SVR VI L V IH I INH V IN V IN V IN eN Parameter Maximum Operating Input Voltage Output Voltage Output Voltage Line Regulation Line Regulation Load Regulation Dropout Voltage (Note 1, 2) Dropout Voltage (Note 1, 2) Quiescent Current Quiescent Current Short Circuit Current Supply Voltage Rejection Control Input Voltage Control Input Voltage Inhibit Input Current Transient Input Voltage Reverse Polarity Input Voltage Reverse Polarity Input Voltage Transient Output Noise Voltage IO = 100 mA f = 120 Hz VIN = 14 ± 2V Tj = -40 to 125 oC o Test Conditions IO = 10 mA Tj = -40 to 125 oC Min. 26 4.75 Typ. 37 5 5 2 4 15 90 250 2.5 0.3 Max. Unit V 5.25 5.5 10 30 50 200 600 30 1 V V mV mV mV V V mA mA mA dB IO = 100 mA VIN = 6 to 26 V Tj = -40 to 125 oC VIN = 9 to 16 V VIN = 6 to 26 V IO = 5 to 100 mA IO = 10 mA IO = 100 mA ON Mode: IOUT = 100mA OFF Mode: VINH = 2.5 V RLOAD = 330Ω 4.5 100 55 300 75 2 1.2 50 Tj = -40 to 125 oC Tj = -40 to 125 C VINH = 2.5 V RLOAD = 500Ω VO ± 0.3V RLOAD = 500Ω τ < 100ms RLOAD = 500Ω τ < 100ms 60 -15 -50 3.25 V V µA V V V 2 22 70 -50 B = 10Hz to 100KHz 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 VI V REF V REF ∆V O ∆V O Vd Vd Id Id I SC SVR VI L V IH I INH V IN V IN V IN eN Parameter Maximum Operating Input Voltage Reference Voltage(Note 1) Reference Voltage(Note 1) Line Regulation Load Regulation Dropout Voltage (Note 1, 2) Dropout Voltage (Note 1, 2) Quiescent Current Quiescent Current Short Circuit Current Supply Voltage Rejection Control Input Voltage Control Input Voltage Inhibit Input Current Transient Input Voltage Reverse Polarity Input Voltage Reverse Polarity Input Voltage Transient Output Noise Voltage IO = 100 mA f = 120 Hz VIN = 14 ± 2V Tj = -40 to 125 oC o Test Conditions IO = 10 mA Tj = -40 to 125 oC Min. 26 1.14 Typ. 37 1.2 1.2 0.6 9 90 250 2.5 0.3 Max. Unit V 1.26 1.32 4.5 30 200 600 30 1 V V mV mV V V mA mA mA dB IO = 100 mA IO = 5 to 100 mA IO = 10 mA IO = 100 mA Tj = -40 to 125 C o 1.08 VIN = 3.6 to 26 V