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LM2931-N

www.ti.com

SNOSBE5G –MARCH 2000–REVISED APRIL 2013

LM2931-N Series Low Dropout Regulators

Check for Samples: LM2931-N

FEATURES

DESCRIPTION

The LM2931-N positive voltage regulator features a

• Very Low Quiescent Current

very low quiescent current of 1mA or less when

• Output Current in Excess of 100 mA

supplying 10mA loads. This unique characteristic and

• Input-output Differential Less than 0.6V

the extremely low input-output differential required for

proper regulation (0.2V for output currents of 10mA)

• Reverse Battery Protection

make the LM2931-N the ideal regulator for standby

• 60V Load Dump Protection

power systems. Applications include memory standby

• −50V Reverse Transient Protection

circuits, CMOS and other low power processor power

supplies as well as systems demanding as much as

• Short Circuit Protection

100mA of output current.

• Internal Thermal Overload Protection

Designed originally for automotive applications, the

• Mirror-image Insertion Protection

LM2931-N and all regulated circuitry are protected

• Available in TO-220, TO-92, TO-263, or SOIC-8

from reverse battery installations or 2 battery jumps.

Packages

During line transients, such as a load dump (60V)

• Available as Adjustable with TTL Compatible

when the input voltage to the regulator can

Switch

momentarily exceed the specified maximum

operating voltage, the regulator will automatically shut

down to protect both internal circuits and the load.

The LM2931-N cannot be harmed by temporary

mirror-image insertion. Familiar regulator features

such as short circuit and thermal overload protection

are also provided.

The LM2931-N family includes a fixed 5V output

(±3.8% tolerance for A grade) or an adjustable output

with ON/OFF pin. Both versions are available in a

TO-220 power package, DDPAK/TO-263 surface

mount package, and an 8-lead SOIC package. The

fixed output version is also available in the TO-92

plastic package.

Connection Diagrams

FIXED VOLTAGE OUTPUT

Figure 1. TO-220 3-Lead Power Package Figure 2. DDPAK/TO-263 Surface-Mount Package

Front View Top View

Figure 3. Side View

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

Summary of content (29 pages)

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LM2931-N www.ti.com SNOSBE5G – MARCH 2000 – REVISED APRIL 2013 LM2931-N Series Low Dropout Regulators Check for Samples: LM2931-N FEATURES DESCRIPTION • • • • • • • • • • The LM2931-N positive voltage regulator features a very low quiescent current of 1mA or less when supplying 10mA loads. This unique characteristic and the extremely low input-output differential required for proper regulation (0.2V for output currents of 10mA) make the LM2931-N the ideal regulator for standby power systems.
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LM2931-N SNOSBE5G – MARCH 2000 – REVISED APRIL 2013 www.ti.com *NC = Not internally connected. Must be electrically isolated from the rest of the circuit for the DSBGA package. Figure 4. 8-Pin SOIC Top View Figure 5. TO-92 Plastic Package Bottom View Figure 6. 6-Bump DSBGA Top View (Bump Side Down) Figure 7. DSBGA Laser Mark ADJUSTABLE OUTPUT VOLTAGE Figure 8. TO-220 5-Lead Power Package Front View Figure 9.
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LM2931-N www.ti.com SNOSBE5G – MARCH 2000 – REVISED APRIL 2013 Figure 11. 8-Pin SOIC Top View Typical Applications *Required if regulator is located far from power supply filter. **C2 must be at least 100 μF to maintain stability. May be increased without bound to maintain regulation during transients. Locate as close as possible to the regulator. This capacitor must be rated over the same operating temperature range as the regulator.
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LM2931-N SNOSBE5G – MARCH 2000 – REVISED APRIL 2013 www.ti.com These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.
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LM2931-N www.ti.com SNOSBE5G – MARCH 2000 – REVISED APRIL 2013 ELECTRICAL CHARACTERISTICS FOR FIXED 3.3V VERSION (continued) VIN = 14V, IO = 10mA, TJ = 25°C, C2 = 100μF (unless otherwise specified) (1) LM2931-N-3.3 Parameter Conditions Dropout Voltage Limit Units 0.05 0.30 0.2 0.6 VMAX Typ IO = 10mA IO = 100mA Maximum Operational Input Voltage (2) 33 26 VMIN Maximum Line Transient RL = 500Ω, VO ≤ 5.5V, T = 1ms, τ ≤ 100ms 70 50 VMIN Reverse Polarity Input Voltage, DC VO ≥ −0.
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LM2931-N SNOSBE5G – MARCH 2000 – REVISED APRIL 2013 www.ti.com ELECTRICAL CHARACTERISTICS FOR ADJUSTABLE VERSION VIN = 14V, VOUT = 3V, IO = 10 mA, TJ = 25°C, R1 = 27k, C2 = 100 μF (unless otherwise specified) Parameter Conditions Reference Voltage (1) Typ Limit Units Limit 1.20 1.26 VMAX 1.14 VMIN IO ≤ 100 mA, −40°C ≤ Tj ≤ 125°C, R1 = 27k 1.32 VMAX Measured from VOUT to Adjust Pin 1.08 VMIN 24 VMAX Output Voltage Range 3 VMIN mV/VMAX Line Regulation VOUT + 0.6V ≤ VIN ≤ 26V 0.2 1.
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LM2931-N www.ti.com SNOSBE5G – MARCH 2000 – REVISED APRIL 2013 TYPICAL PERFORMANCE CHARACTERISTICS Dropout Voltage Dropout Voltage Figure 14. Figure 15. Low Voltage Behavior Output at Voltage Extremes Figure 16. Figure 17. Line Transient Response Load Transient Response Figure 18. Figure 19.
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LM2931-N SNOSBE5G – MARCH 2000 – REVISED APRIL 2013 www.ti.com TYPICAL PERFORMANCE CHARACTERISTICS (continued) 8 Peak Output Current Quiescent Current Figure 20. Figure 21. Quiescent Current Quiescent Current Figure 22. Figure 23. Ripple Rejection Ripple Rejection Figure 24. Figure 25.
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LM2931-N www.ti.com SNOSBE5G – MARCH 2000 – REVISED APRIL 2013 TYPICAL PERFORMANCE CHARACTERISTICS (continued) Output Impedance Operation During Load Dump Figure 26. Figure 27. Reference Voltage Maximum Power Dissipation (SOIC-8) Figure 28. Figure 29. Maximum Power Dissipation (TO-220) Maximum Power Dissipation (TO-92) Figure 30. Figure 31.
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LM2931-N SNOSBE5G – MARCH 2000 – REVISED APRIL 2013 www.ti.com TYPICAL PERFORMANCE CHARACTERISTICS (continued) Maximum Power Dissipation (TO-263) (1) On/Off Threshold Figure 32. Figure 33. Output Capacitor ESR Figure 34. (1) 10 The maximum power dissipation is a function of maximum junction temperature TJmax, total thermal resistance θJA, and ambient temperature TA. The maximum allowable power dissipation at any ambient temperature is PD = (TJmax − TA)/θJA.
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LM2931-N www.ti.
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LM2931-N SNOSBE5G – MARCH 2000 – REVISED APRIL 2013 www.ti.com APPLICATION HINTS One of the distinguishing factors of the LM2931-N series regulators is the requirement of an output capacitor for device stability. The value required varies greatly depending upon the application circuit and other factors. Thus some comments on the characteristics of both capacitors and the regulator are in order. High frequency characteristics of electrolytic capacitors depend greatly on the type and even the manufacturer.
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LM2931-N www.ti.com SNOSBE5G – MARCH 2000 – REVISED APRIL 2013 Definition of Terms Dropout Voltage: The input-output voltage differential at which the circuit ceases to regulate against further reduction in input voltage. Measured when the output voltage has dropped 100 mV from the nominal value obtained at 14V input, dropout voltage is dependent upon load current and junction temperature. Input Voltage: The DC voltage applied to the input terminals with respect to ground.
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LM2931-N SNOSBE5G – MARCH 2000 – REVISED APRIL 2013 www.ti.com REVISION HISTORY Changes from Revision F (April 2013) to Revision G • 14 Page Changed layout of National Data Sheet to TI format ..........................................................................................................
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PACKAGE OPTION ADDENDUM www.ti.com 1-Nov-2013 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan Lead/Ball Finish MSL Peak Temp (2) (6) (3) Op Temp (°C) Device Marking (4/5) LM2931AM-5.0 NRND SOIC D 8 95 TBD Call TI Call TI -40 to 85 2931A M-5.0 LM2931AM-5.0/NOPB ACTIVE SOIC D 8 95 Green (RoHS & no Sb/Br) SN | CU SN Level-1-260C-UNLIM -40 to 85 2931A M-5.0 LM2931AMX-5.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 1-Nov-2013 (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
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PACKAGE MATERIALS INFORMATION www.ti.com 8-Apr-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device LM2931AMX-5.0 Package Package Pins Type Drawing SOIC SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) D 8 2500 330.0 12.4 6.5 B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 5.4 2.0 8.0 12.0 Q1 LM2931AMX-5.0/NOPB SOIC D 8 2500 330.0 12.4 6.5 5.4 2.0 8.0 12.0 Q1 LM2931ASX-5.0 DDPAK/ TO-263 KTT 3 500 330.0 24.4 10.75 14.85 5.0 16.0 24.
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PACKAGE MATERIALS INFORMATION www.ti.com 8-Apr-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LM2931AMX-5.0 SOIC D 8 2500 367.0 367.0 35.0 LM2931AMX-5.0/NOPB SOIC D 8 2500 367.0 367.0 35.0 LM2931ASX-5.0 DDPAK/TO-263 KTT 3 500 367.0 367.0 45.0 LM2931ASX-5.0/NOPB DDPAK/TO-263 KTT 3 500 367.0 367.0 45.0 LM2931CMX SOIC D 8 2500 367.0 367.0 35.0 LM2931CMX/NOPB SOIC D 8 2500 367.0 367.0 35.
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MECHANICAL DATA NDH0005D www.ti.
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MECHANICAL DATA NDE0003B www.ti.
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MECHANICAL DATA KTT0003B TS3B (Rev F) BOTTOM SIDE OF PACKAGE www.ti.
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MECHANICAL DATA KTT0005B TS5B (Rev D) BOTTOM SIDE OF PACKAGE www.ti.
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MECHANICAL DATA NEB0005F www.ti.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.