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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Infineon Technologies TLF2931G V50

Name: TLF2931G V50
Brand: Infineon Technologies
SKU: TLF2931G V50
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TLF2931G V50

Manufacturer:: Infineon Technologies

Category:: Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: TLF2931G V50.pdf

Description:: IC REG LINEAR FIXED LDO REG

Quantity:: RFQ Add To RFQ list

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Inventory:2,500

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Product details

Overview

TLF2931GV50 from Infineon Technologies is an AEC-Q100 qualified automotive-grade low-dropout linear voltage regulator delivering 5.0 V ±2.5% output at up to 100 mA, with dropout voltage as low as 0.05 V at 10 mA and quiescent current ≤1 mA. It features reverse battery protection, overtemperature shutdown, mirror-image insertion tolerance, and operates from 6 V to 28 V input in harsh automotive environments such as body control modules.

For engineers reviewing the TLF2931GV50 datasheet, TLF2931GV50 pinout, TLF2931GV50 application, or TLF2931GV50 equivalent, key selection criteria include its 0.05 V dropout at light load, 1 mA quiescent current for always-on systems, AEC-Q100 qualification, PG-DSO-8 thermal performance (R_thJA = 96 K/W), and integrated reverse polarity protection without external components.

Technical Context

The TLF2931GV50 employs a bandgap reference and error amplifier-based control loop with saturation control and thermal sensing circuitry. Its architecture enables stable regulation under wide input voltage (6–28 V) and load (0–100 mA) variations while maintaining <0.2 V dropout at 10 mA and <0.6 V at 100 mA.

Protection functions are implemented via dedicated on-die circuits: reverse-battery detection triggers internal blocking, overtemperature shutdown activates at T_j ≥125 °C, and current limiting responds to output short-circuit conditions. Pin 4 and 5 are unconnected-no external bias or feedback required.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	5.0 V ±2.5% (±125 mV) at 10 mA, ensuring stable MCU I/O supply in 5 V domains
Dropout Voltage	0.05 V (typ.) at 10 mA - enables operation with only 5.05 V input, critical for cold-crank scenarios
Quiescent Current	≤1 mA at 10 mA load - minimizes standby power loss in always-on vehicle networks
Input Voltage Range	6 V to 28 V - supports 12 V automotive battery systems including load dump transients
Thermal Resistance	R_thJA = 96 K/W - defines PCB heatsinking requirement for continuous 100 mA operation at 125 °C ambient
ESD Rating	±2 kV HBM - meets automotive board-level ESD robustness requirements per ISO 10605
Operating Junction Temp	−40 °C to +125 °C - validated for engine bay and cabin-mounted ECUs

Pinout & Package

TLF2931GV50 is housed in a PG-DSO-8 surface-mount package (8-pin SOIC variant with exposed thermal pad), optimized for automotive thermal cycling and reflow compatibility. The package footprint aligns with JEDEC MS-012AC and supports standard SMT assembly.

Pin/Terminal	Circuit Role	Design Meaning
1	OUT	Main regulated 5 V output; requires local 10 µF ceramic capacitor to GND for stability
2,3,6,7	GND	Power ground return paths; pins 2/3/6/7 form common thermal and electrical ground plane
4,5	n.c.	No internal connection; must remain unconnected per design - no pull-up/down or routing allowed
8	IN	Unregulated input supply; recommended to place 100 nF decoupling capacitor close to this pin

Key Features

Feature	Design Value
Reverse Battery Protection	Withstands −30 V input continuously without external diode - eliminates need for series Schottky in battery feed
Mirror-Image Insertion Tolerance	Survives accidental 180° PCB placement - prevents field failure during manual assembly or rework
Low Dropout at Light Load	0.05 V dropout at 10 mA enables direct regulation from 5.05 V sources, e.g., post-DCDC LDO stage
Integrated Overtemperature Shutdown	Auto-recovery thermal cutoff at T_j ≥125 °C - protects against sustained overload without latch-up
Green Product Compliance	RoHS-compliant materials and Pb-free terminations - satisfies EU ELV and global automotive substance restrictions

Applications

Body Control Module (BCM)

Instrument Cluster Display

Use Scenario: Powering microcontroller, CAN transceiver, and LED drivers in centralized vehicle body electronics.

IC Role / Device Role / Timing Role: Primary 5 V LDO for always-on logic domain with cold-crank support down to 6 V input.

Use Value: 1 mA quiescent current extends battery life during extended parking; reverse polarity tolerance avoids fuse blow during service battery swaps.

Use Scenario: Supplying TFT LCD controller and backlight driver ICs in digital instrument panels.

IC Role / Device Role / Timing Role: Clean, low-noise 5 V rail isolated from noisy 12 V battery bus using integrated PSRR >80 dB at 120 Hz.

Use Value: 500 µV_rms output noise ensures flicker-free display operation; PG-DSO-8 thermal pad aids heat dissipation near display glass.

Door Module Actuator Control

Telematics Control Unit (TCU) Standby Rail

Use Scenario: Regulating power for window lift motor drivers and door lock solenoids in distributed door modules.

IC Role / Device Role / Timing Role: Fault-tolerant 5 V supply with current limiting and thermal shutdown to survive motor stall events.

Use Value: Output current limitation prevents trace damage during actuator jam; AEC-Q100 qualification ensures reliability across 15-year vehicle lifecycle.

Use Scenario: Providing always-on 5 V supply to real-time clock, wake-up interrupt logic, and cellular modem retention memory in TCUs.

IC Role / Device Role / Timing Role: Ultra-low-I_Q LDO maintaining system state during ignition-off periods.

Use Value: ≤1 mA I_Q limits parasitic drain to <10 µA/km over 10 years - meets OEM battery discharge specifications.

Equivalent & Alternatives

The following parts are listed as comparable options for similar LDO regulator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLF2931GV33	Fixed 3.3 V output; higher dropout (0.85 V typ. at 100 mA); identical pinout and protection features	Targets 3.3 V logic domains (e.g., microcontrollers, sensors) instead of 5 V peripherals	Select when system requires 3.3 V rail with same thermal and automotive robustness
NCP1117ST50T3G	Non-AEC-Q100; 1.2 V dropout at 1 A; no reverse battery protection; SOT-223 package	Lacks automotive qualification and fault protections - suitable only for non-safety-critical industrial use	Use only in cost-sensitive, non-automotive designs where qualification and reverse polarity immunity are not required

Compared with TLF2931GV50, the TLF2931GV33 offers identical automotive robustness but targets 3.3 V logic, while NCP1117ST50T3G trades qualification and protection for higher current and lower cost - making it unsuitable for automotive deployment without external safeguards.

Availability

TLF2931GV50 is available at Aetrix Electronics and suitable for body control modules, instrument clusters, door modules, and telematics units requiring stable component supply across long automotive production lifecycles.

Supply support for TLF2931GV50 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

Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive electronics, and security solutions, with global R&D and manufacturing infrastructure.

The TLF2931 belongs to Infineon's automotive LDO regulator product line, engineered specifically for reliable, low-power, fault-tolerant voltage regulation in 12 V vehicle electrical systems.

FAQ

What is the minimum input voltage required for regulation at full 100 mA load?

The TLF2931GV50 maintains regulation down to 5.6 V input at 100 mA load, based on its maximum dropout voltage of 0.6 V. Below this, output voltage collapses linearly. Input must remain ≥6 V per functional range specification to guarantee specified performance and protection behavior.

Can pins 4 and 5 be tied to GND or left floating on the PCB?

Pins 4 and 5 are internally unconnected (n.c.) and must remain unattached - neither grounded nor routed. Connecting them risks unintended current paths or interference with internal protection circuitry. PCB layout must isolate these pads with solder mask and avoid copper traces or vias.

Does the TLF2931GV50 require an external capacitor on the IN pin?

Yes - a 100 nF ceramic capacitor between pin 8 (IN) and GND is recommended per datasheet Figure 2 layout guidance. This suppresses high-frequency noise and stabilizes input impedance during transient load steps, preventing oscillation or line-regulation degradation.

How does the mirror-image insertion protection function electrically?

Mirror-image insertion protection is implemented via symmetrical internal ESD clamp structures and bidirectional input-stage design. When pins 1 and 8 are swapped, the IC remains non-conductive rather than latching or conducting destructively - verified per AEC-Q100 stress test A11.

TLF2931G V50 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: 8-SOIC (0.154", 3.90mm Width)

Packaging:: Bulk

Product Status:: Active

Output Configuration:: Positive

Output Type:: Fixed

Number of Regulators:: 1

Voltage - Input (Max):: 28V

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):: 15 mA

PSRR:: 80dB (120Hz)

Control Features:: -

Protection Features:: Mirror-Image Insertion, Over Current, Over Temperature, Reverse Polarity

Operating Temperature:: -40°C ~ 125°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: PG-DSO-8

TLF2931G V50 FAQ

1.How can I place an order for TLF2931G V50 through Aetrix?

Please submit a Request for Quotation (RFQ) for TLF2931G V50 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 TLF2931G V50 reliable?

The price and inventory of TLF2931G V50 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLF2931G V50 is usually 5 days.

3.What payment methods are accepted for TLF2931G V50?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLF2931G V50 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TLF2931G V50?

TLF2931G V50 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TLF2931G V50 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 TLF2931G V50?

For technical support, including TLF2931G V50 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLF2931G V50 requirements.

6.How does Aetrix verify that TLF2931G V50 is sourced from the original manufacturer or authorized distributors?

All TLF2931G V50 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 TLF2931G V50 meets industry standards.

7.What is the process for return or replacement of TLF2931G V50?

All TLF2931G V50 units undergo pre-shipment inspection (PSI). If there is an issue with TLF2931G V50, 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 TLF2931G V50 part is unused and in its original packaging.

Return procedure for TLF2931G V50:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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