My Inquiry
My Account
onsemi LM2931DT-5.0
- Part No.:
- LM2931DT-5.0
- Manufacturer:
- onsemi
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
LM2931DT-5.0.pdf
- Description:
- IC REG LINEAR 5V 100MA DPAK
- Quantity:
- Payment:
- Shipping:
Inventory:2,199
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM2931DT-5.0 from onsemi is a fixed-output 5.0 V, ±5.0% tolerance LDO voltage regulator in DPAK (Case 369C) package, delivering up to 100 mA output current with dropout voltage as low as 0.16 V at 100 mA and 60 V load dump protection - designed for automotive and industrial battery-powered systems requiring robust fault resilience.
For engineers reviewing the LM2931DT-5.0 datasheet, pinout, applications, or equivalent options, key selection criteria include input voltage range (6–26 V), thermal resistance (RJA = 92 °C/W, RJC = 6.0 °C/W), reverse polarity survival (−50 V), and bias current (0.4 mA typical at 10 mA load).
Technical Context
The LM2931DT-5.0 integrates internal current limiting, thermal shutdown, and overvoltage protection (26–40 V threshold), enabling operation in harsh automotive environments including load dump transients and mirror-image insertion. Its PNP pass transistor architecture enables ultra-low dropout and stable regulation under wide temperature (−40 °C to +125 °C) and load (5–100 mA) conditions.
Unlike standard CMOS LDOs, this device uses bipolar technology to achieve high accuracy reference (±5.0% output tolerance), low noise (700 µVrms, 10 Hz–100 kHz), and ripple rejection of 60–90 dB at 120 Hz - all while maintaining 0.4 mA quiescent current at light loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V ±5.0% (guaranteed over −40 °C to +125 °C, 6–26 V input, ≤100 mA load) |
| Dropout Voltage | 0.16 V max at 100 mA (enables regulation down to 5.16 V input; critical for 6 V battery systems) |
| Load Dump Protection | Withstands 60 V transients ≤100 ms (AEC-Q100-compliant surge immunity for 12 V automotive rails) |
| Bias Current | 0.4 mA typical at 10 mA output (extends battery life in always-on sensor nodes) |
| Ripple Rejection | 60–90 dB at 120 Hz (suppresses alternator ripple in vehicle power supplies) |
| Thermal Resistance | RJA = 92 °C/W (vertical mounting); RJC = 6.0 °C/W (supports >1.5 W dissipation with minimal heatsink) |
| Reverse Polarity Protection | Survives −50 V input (prevents damage during jump-start misconnection) |
Pinout & Package
DPAK (Case 369C) surface-mount package with exposed thermal pad (pin 2 connected to heatsink surface). Designed for vertical PCB mounting with copper pour for thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Input | Accepts 6–26 V DC input; must be bypassed with ≥0.1 µF ceramic capacitor near pin |
| 2 | Ground / Heatsink | Common return path and primary thermal interface; requires direct PCB copper connection |
| 3 | Output | Regulated 5.0 V supply; requires ≥100 µF output capacitor (ESR ≤0.3 Ω) for stability |
Key Features
| Feature | Design Value |
|---|---|
| Low Dropout Architecture | 0.16 V dropout at 100 mA enables use with depleted 6 V batteries without brownout |
| Integrated Load Dump Protection | 60 V transient rating eliminates need for external TVS diode in automotive 12 V systems |
| Reverse Polarity Survival | Operates safely at −50 V input - prevents field failures from battery reversal during service |
| Thermal Shutdown + Current Limit | Self-protecting under short-circuit or overload; recovers automatically after cooldown |
| Stable with Electrolytic Capacitors | Validated with 100 µF/0.3 Ω ESR output caps - avoids costly tantalum or polymer alternatives |
Applications
| Automotive Body Control Module (BCM) | Industrial Handheld Meter |
|---|---|
Use Scenario: Powering microcontroller, CAN transceiver, and sensors in door module exposed to 12 V rail transients and cold cranking. IC Role / Device Role / Timing Role: Primary 5 V LDO supplying logic and analog circuitry; acts as fault-isolating power stage. Use Value: Survives −50 V reverse jump-start and 60 V load dump without external protection components. | Use Scenario: Battery-powered multimeter with LCD, ADC, and Bluetooth LE radio operating across −20 °C to +60 °C. IC Role / Device Role / Timing Role: Main system regulator delivering stable 5 V to MCU and precision analog front-end. Use Value: 0.4 mA bias current extends alkaline battery life beyond 12 months in sleep mode. |
| Camcorder Power Management | Smart Building Sensor Node |
Use Scenario: Compact camcorder using 7.4 V Li-ion pack; requires clean 5 V for image sensor and video processor. IC Role / Device Role / Timing Role: Low-noise post-regulator filtering switching converter ripple before analog signal chain. Use Value: 700 µVrms output noise and 90 dB ripple rejection preserve SNR in 1080p video capture. | Use Scenario: Wireless occupancy sensor node powered by two AA cells; duty-cycled operation with wake-up bursts. IC Role / Device Role / Timing Role: Always-on LDO maintaining real-time clock and wake-up circuitry during deep sleep. Use Value: Maintains regulation down to 5.16 V input - supports full battery discharge to 0.9 V/cell. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NCP1117DT50RKG | Higher dropout (1.1 V @ 1 A), lower current (1 A), no load dump protection | Suitable for non-automotive 5 V rails where transients are filtered externally | Select when cost-sensitive industrial designs require higher output current but tolerate larger input margin |
| NCV8664DT50RKG | Same DPAK package, AEC-Q100 qualified, 60 V load dump, but ±2% tolerance and 150 mA output | Direct upgrade path for tighter voltage accuracy and higher load capability in automotive ECUs | Choose when design requires improved output accuracy and headroom for future feature expansion |
Compared with LM2931DT-5.0, NCP1117DT50RKG lacks automotive-grade transient protection and has significantly higher dropout, while NCV8664DT50RKG offers tighter tolerance and higher current but at increased cost and BOM complexity.
Availability
LM2931DT-5.0 is available at Aetrix Electronics and suitable for automotive body electronics, industrial handheld instruments, camcorders, and smart building sensor nodes requiring stable component supply with guaranteed long-term availability and automotive-grade reliability.
Supply support for LM2931DT-5.0 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
onsemi (formerly ON Semiconductor) is a global semiconductor manufacturer specializing in energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The LM2931 series was engineered specifically for automotive and industrial environments demanding survivability against reverse battery, load dump, and mirror-image faults - prioritizing ruggedness over ultra-low quiescent current.
FAQ
What is the maximum input voltage the LM2931DT-5.0 can withstand during load dump events?
The LM2931DT-5.0 is rated for 60 V transient input voltage (≤100 ms duration), per its Maximum Ratings table. This allows it to survive automotive load dump surges without external clamping components. Continuous operation remains limited to 40 V DC input; exceeding 60 V even briefly risks permanent damage. The device's internal protection circuitry activates above ~29.5 V to prevent latch-up or junction breakdown.
Does the LM2931DT-5.0 require an external output capacitor, and what are the stability requirements?
Yes, the LM2931DT-5.0 requires an external output capacitor for stability - it is not internally compensated. A minimum 100 µF electrolytic capacitor with ESR ≤0.3 Ω is specified. Solid tantalum capacitors may be used if size-constrained, but must meet the |ZO| < 0.4 Ω limit across −40 °C to +125 °C. Operation below 10 µF risks oscillation, especially at low temperatures.
Is the LM2931DT-5.0 pin-compatible with other regulators in the LM2931 family?
No - the LM2931DT-5.0 (DPAK, 3-pin) has different pinout and thermal characteristics than TO-220 (LM2931T-5.0) or SOIC-8 (LM2931D-5.0R2G) variants. While functionally identical as fixed 5 V regulators, mechanical layout, thermal pad connection (pin 2), and solder profile differ. PCB redesign is required when substituting packages.
What is the output voltage tolerance of the LM2931DT-5.0 over temperature and load?
The LM2931DT-5.0 guarantees 5.0 V ±5.0% over full operating conditions: −40 °C to +125 °C ambient, 6–26 V input, and 0–100 mA load. At 25 °C and 10 mA load, typical output is 5.0 V with min/max of 4.50 V and 5.50 V. This wider tolerance reflects its focus on fault resilience rather than precision regulation.
Can the LM2931DT-5.0 be used in reverse-battery protection circuits without additional components?
The LM2931DT-5.0 survives −50 V reverse polarity input without damage, but does not actively block reverse current - it simply enters high-impedance state. For true reverse-battery protection (i.e., zero output during reverse connection), an external series Schottky diode or ideal diode controller is still required. Its −50 V rating ensures no catastrophic failure during service errors.
LM2931DT-5.0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Packaging:
- Tube
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 26V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.6V @ 100mA
- Current - Output:
- 100mA
- Current - Quiescent (Iq):
- 1 mA
- Current - Supply (Max):
- 30 mA
- PSRR:
- 90dB (120Hz)
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DPAK
LM2931DT-5.0 FAQ
1.How can I place an order for LM2931DT-5.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2931DT-5.0 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LM2931DT-5.0 reliable?
The price and inventory of LM2931DT-5.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2931DT-5.0 is usually 5 days.
3.What payment methods are accepted for LM2931DT-5.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2931DT-5.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2931DT-5.0?
LM2931DT-5.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2931DT-5.0 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LM2931DT-5.0?
For technical support, including LM2931DT-5.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2931DT-5.0 requirements.
6.How does Aetrix verify that LM2931DT-5.0 is sourced from the original manufacturer or authorized distributors?
All LM2931DT-5.0 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LM2931DT-5.0 meets industry standards.
7.What is the process for return or replacement of LM2931DT-5.0?
All LM2931DT-5.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM2931DT-5.0, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LM2931DT-5.0 part is unused and in its original packaging.
Return procedure for LM2931DT-5.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2931DT-5.0 Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
