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

Infineon Technologies TLE4274V50AKSA1

Name: TLE4274V50AKSA1
Brand: Infineon Technologies
SKU: TLE4274V50AKSA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TLE4274V50AKSA1

Manufacturer:: Infineon Technologies

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

Package:: TO-220-3

Datasheet:: TLE4274V50AKSA1.pdf

Description:: IC REG LINEAR FIXED LDO REG

Quantity:: RFQ Add To RFQ list

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Inventory:501

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Product details

Overview

TLE4274V50AKSA1 from Infineon Technologies is a low-dropout linear voltage regulator delivering a fixed 5.0 V output with ±4% tolerance, rated for 400 mA continuous load current and operating across input voltages from 5.5 V to 40 V. It features reverse-polarity protection, short-circuit proof operation, thermal shutdown, and is AEC-Q100 qualified for automotive power supply rails in engine control units and body electronics.

For engineers reviewing the TLE4274V50AKSA1 datasheet, TLE4274V50AKSA1 pinout, TLE4274V50AKSA1 application, or TLE4274V50AKSA1 equivalent, key selection criteria include dropout voltage ≤500 mV at 250 mA, quiescent current ≤30 μA at full load, junction-to-ambient thermal resistance of 65 K/W in PG-TO220-3-1, and RoHS-compliant green packaging for automotive-grade reliability.

Technical Context

The TLE4274V50AKSA1 uses an internal bandgap reference and error amplifier to regulate output voltage via a series pass transistor with saturation control that prevents deep saturation under high load. Protection circuitry includes integrated overtemperature shutdown (trip at ~150 °C), reverse-polarity blocking, and current limiting triggered when output voltage drops 100 mV below nominal.

It operates as a three-terminal monolithic IC requiring only two external capacitors: a 100 nF ceramic input capacitor (with optional 1 Ω damping resistor) and ≥22 μF output capacitor with ESR ≤3 Ω. No external feedback network is needed due to fixed internal voltage division.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	5.0 V ±4% - stable rail for microcontrollers and sensors in 12 V automotive systems
Max Output Current	400 mA - sufficient for powering multiple ECUs subsystems without external boost
Dropout Voltage	≤500 mV @ 250 mA - enables regulation down to VI = 5.5 V, critical during cold-crank conditions
Quiescent Current	≤30 μA @ IQ = 400 mA - minimizes standby power loss in always-on vehicle modules
Input Voltage Range	5.5 V to 40 V - supports 12 V and 24 V battery systems including load-dump transients
Thermal Resistance	R_thJA = 65 K/W - requires minimal heatsinking on standard 80×80 mm PCB with 300 mm² copper area
Protection Features	Reverse polarity, short-circuit, overtemperature - eliminates need for external protection components

Pinout & Package

Package: PG-TO220-3-1 (RoHS-compliant, thermally enhanced through-tab mounting). Tab is electrically connected to GND and must be soldered to PCB ground plane or heatsink for thermal performance.

Pin/Terminal	Circuit Role	Design Meaning
1 (I)	Input	Unregulated input supply; must be decoupled with 100 nF ceramic capacitor directly at pin
2 (GND)	Ground	Power and signal reference; connects internally to tab; requires low-impedance PCB ground plane
3 (Q)	Output	Regulated 5.0 V output; requires ≥22 μF output capacitor with ESR ≤3 Ω for stability

Key Features

Feature	Design Value
AEC-Q100 qualified	Qualified to Grade 1 (-40 °C to +125 °C ambient) for automotive safety-critical power rails
Low quiescent current	≤8 μA at 1 mA load - extends battery life in sleep-mode vehicle modules
Integrated thermal shutdown	Automatic disable above ~150 °C junction temperature with auto-recovery on cooldown
Reverse polarity protection	Withstands -42 V input without damage - eliminates need for external series diode
Short-circuit proof	Limits output current to ~600 mA during fault while maintaining regulation until thermal limit

Applications

Engine Control Unit Power

Body Control Module Supply

Use Scenario: Provides stable 5 V rail for MCU, CAN transceivers, and analog sensors in gasoline/diesel ECU housings exposed to wide temperature and vibration.

IC Role / Device Role / Timing Role: Primary post-regulator converting switched 12 V battery supply to noise-immune logic voltage.

Use Value: Dropout ≤500 mV ensures uninterrupted operation during cold-crank (VI ≥ 5.5 V), while AEC-Q100 qualification guarantees 15-year field reliability.

Use Scenario: Powers door lock actuators, interior lighting drivers, and LIN transceivers in centralized body controllers.

IC Role / Device Role / Timing Role: Local LDO supplying isolated 5 V domain independent of main system rail fluctuations.

Use Value: Reverse-polarity tolerance (-42 V) protects against battery misconnection during service; low I_q reduces parasitic drain in parked-vehicle mode.

Instrument Cluster Display

ADAS Camera Power

Use Scenario: Supplies 5 V to TFT display controller, touch interface IC, and backlight driver in digital instrument clusters.

IC Role / Device Role / Timing Role: Low-noise local regulator minimizing ripple-induced visual artifacts on high-resolution displays.

Use Value: PSRR ≥60 dB at 100 Hz suppresses alternator ripple; thermal shutdown prevents latch-up during prolonged sun-load exposure.

Use Scenario: Powers image sensor SoC and ISP in rear-view or surround-view cameras mounted near exhaust or wheel wells.

IC Role / Device Role / Timing Role: High-temp-stable voltage source enabling reliable startup and operation up to 125 °C ambient.

Use Value: R_thJA = 65 K/W allows direct PCB-mounting without discrete heatsink; 400 mA headroom supports burst-mode sensor operation.

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-dropout automotive voltage regulator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLV73350PDBVR	300 mA max output, 250 mV dropout @ 300 mA, SOT-23-5 package, no reverse-polarity protection	Not AEC-Q100 qualified; limited thermal capability; unsuitable for under-hood use	Select only for non-automotive, space-constrained, low-power applications where reverse polarity risk is absent
NCV8664ST50T3G	250 mA max output, 600 mV dropout @ 250 mA, DPAK package, includes reset flag output	Lower current rating and higher dropout reduce cold-crank margin; reset function adds monitoring capability	Prefer when system-level reset signaling is required and load current stays below 250 mA

Compared with TLV73350PDBVR and NCV8664ST50T3G, the TLE4274V50AKSA1 delivers higher current (400 mA), lower dropout (≤500 mV), integrated reverse-polarity protection, and full AEC-Q100 qualification - making it uniquely suited for demanding under-hood automotive power domains.

Availability

TLE4274V50AKSA1 is available at Aetrix Electronics and suitable for engine control units, body control modules, instrument clusters, and ADAS camera systems requiring stable component supply with automotive-grade lifecycle assurance.

Supply support for TLE4274V50AKSA1 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 industrial control ICs, with global manufacturing and quality certification aligned to ISO/TS 16949.

The TLE4274 series belongs to Infineon's automotive linear regulator product line, designed specifically to replace discrete solutions in 12 V/24 V vehicle electrical systems while meeting stringent AEC-Q100, EMC, and thermal robustness requirements.

FAQ

What is the minimum input voltage required for regulation at full 400 mA load?

The minimum input voltage is 5.5 V, as specified in the operating range table for the V50 version. At this input, the device maintains 5.0 V output with ≤500 mV dropout, ensuring regulation even during automotive cold-crank events where battery voltage dips transiently to 5.5–6.0 V.

Can TLE4274V50AKSA1 be used without a heatsink in free-air conditions?

No - its R_thJA of 65 K/W assumes mounting on an 80×80 mm PCB with 300 mm² copper heatsink area. In free-air, junction temperature would exceed 150 °C at >100 mA load. Thermal design must include PCB copper pour or external heatsink attached to the grounded tab.

Does the device require an external diode for reverse-voltage protection?

No - the TLE4274V50AKSA1 integrates reverse-polarity protection and withstands -42 V applied to the input pin without damage or latch-up, eliminating the need for an external series diode and associated forward-voltage drop or power loss.

How does the current-limiting behavior respond during sustained short-circuit conditions?

Under short-circuit, output current is limited to ~600 mA (per absolute maximum ratings), and thermal shutdown activates if junction temperature exceeds ~150 °C. Once cooled below the hysteresis threshold (~135 °C), the device automatically recovers regulation without requiring power-cycle reset.

TLE4274V50AKSA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: TO-220-3

Packaging:: Bulk

Product Status:: Active

Output Configuration:: Positive

Output Type:: Fixed

Number of Regulators:: 1

Voltage - Input (Max):: 40V

Voltage - Output (Min/Fixed):: 5V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.5V @ 250mA

Current - Output:: 400mA

Current - Quiescent (Iq):: 220 µA

Current - Supply (Max):: 30 mA

PSRR:: 60dB (100Hz)

Control Features:: -

Protection Features:: Over Current, Over Temperature, Reverse Polarity, Short Circuit

Operating Temperature:: -40°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: PG-TO220-3-1

TLE4274V50AKSA1 FAQ

1.How can I place an order for TLE4274V50AKSA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for TLE4274V50AKSA1 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 TLE4274V50AKSA1 reliable?

The price and inventory of TLE4274V50AKSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLE4274V50AKSA1 is usually 5 days.

3.What payment methods are accepted for TLE4274V50AKSA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLE4274V50AKSA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TLE4274V50AKSA1?

TLE4274V50AKSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TLE4274V50AKSA1 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 TLE4274V50AKSA1?

For technical support, including TLE4274V50AKSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLE4274V50AKSA1 requirements.

6.How does Aetrix verify that TLE4274V50AKSA1 is sourced from the original manufacturer or authorized distributors?

All TLE4274V50AKSA1 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 TLE4274V50AKSA1 meets industry standards.

7.What is the process for return or replacement of TLE4274V50AKSA1?

All TLE4274V50AKSA1 units undergo pre-shipment inspection (PSI). If there is an issue with TLE4274V50AKSA1, 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 TLE4274V50AKSA1 part is unused and in its original packaging.

Return procedure for TLE4274V50AKSA1:

1.Submit a request within 90 days.

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

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