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

Infineon Technologies TLE4276DV50ATMA2

Name: TLE4276DV50ATMA2
Brand: Infineon Technologies
SKU: TLE4276DV50ATMA2
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TLE4276DV50ATMA2

Manufacturer:: Infineon Technologies

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

Package:: TO-252-5, DPAK (4 Leads + Tab), TO-252AD

Datasheet:: TLE4276DV50ATMA2.pdf

Description:: IC REG LINEAR 5V 400MA TO252-5

Quantity:: RFQ Add To RFQ list

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Inventory:2,319

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Product details

Overview

TLE4276DV50ATMA2 from Infineon is a fixed-output 5.0 V low-dropout linear voltage regulator in PG-TO252-5 package, rated for 400 mA output current, ±4% output voltage tolerance, and input voltage range up to 40 V. It features an inhibit input (INH) enabling <10 µA shutdown current, reverse-polarity protection, short-circuit proofing, and thermal shutdown - designed for automotive power supply rails in engine control units and body electronics.

For engineers reviewing the TLE4276DV50ATMA2 datasheet, TLE4276DV50ATMA2 pinout, TLE4276DV50ATMA2 application, or TLE4276DV50ATMA2 equivalent, key selection criteria include dropout voltage at 250 mA (250–500 mV), junction-to-case thermal resistance (4 K/W), AEC-Q100 qualification, RoHS compliance, and PG-TO252-5 heatsink-compatible footprint.

Technical Context

The TLE4276DV50ATMA2 implements a bandgap-referenced control amplifier driving a series pass transistor with saturation control to prevent oversaturation under load. Its internal protection circuits independently monitor overload, overtemperature (shutdown at ~150 °C), and reverse polarity conditions.

It operates across -40 °C to +150 °C junction temperature, supports input voltages from (V_Q + 0.5) V to 40 V, and requires ≥22 µF output capacitance with ESR ≤3 Ω at 10 kHz for stability. The INH pin is low-active and tolerant to -42 V to +45 V.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 5.0 V ±4% (4.8–5.2 V); stable across 5–400 mA load and 6–40 V input.
Max Output Current	400 mA continuous; current limiting activates at ~600 mA typ., clamping fault current.
Dropout Voltage	250–500 mV at 250 mA; enables regulation from 5.25 V input in low-voltage automotive cranking.
Shutdown Current	<10 µA at T_j ≤100 °C with INH = 0 V; reduces system standby power in sleep-mode ECUs.
Thermal Resistance	R_th,j-c = 4 K/W; allows direct PCB copper heatsinking for high-power dissipation without external heatsink.
ESD Rating	HBM ±2000 V; meets automotive board-level ESD robustness requirements per ISO 10605.
Qualification	AEC-Q100 Grade 1 (-40 °C to +125 °C ambient); qualified for under-hood automotive applications.

Pinout & Package

Package: PG-TO252-5 (D-Pak variant), thermally enhanced with exposed die pad connected to GND for heatsinking. Pin 1: Input (I), Pin 2: Inhibit (INH), Pin 3: Ground (GND), Pin 4: No Connect (N.C.), Pin 5: Output (Q). Heatsink tab electrically tied to GND.

Pin/Terminal	Circuit Role	Design Meaning
1 (I)	Input voltage supply	Accepts 5.25–40 V DC; requires local ceramic capacitor to ground for line transient suppression.
2 (INH)	Low-active inhibit control	Pulls device into ultra-low-I_q state (<10 µA) when logic-low; tolerant to -42 V reverse bias.
3 (GND)	Power and signal reference	Common return path; connects to exposed heatsink pad; must be low-inductance PCB plane.
4 (N.C.)	No connection	Internally unconnected; must remain floating - no routing or soldering allowed.
5 (Q)	Regulated 5 V output	Delivers up to 400 mA; requires ≥22 µF/≤3 Ω ESR output capacitor for loop stability.

Key Features

Feature	Design Value
Reverse polarity protection	Withstands -42 V input without damage; eliminates need for external series diode in battery-reversed scenarios.
Short-circuit proof operation	Internal current limiting and foldback prevent thermal runaway during sustained output shorts.
Thermal shutdown	Turns off output at ~150 °C junction temperature; auto-recovers after cooldown - prevents permanent failure.
Low quiescent current in shutdown	<10 µA I_q enables >10-year battery life in always-on automotive modules (e.g., alarm controllers).
Automotive-grade reliability	AEC-Q100 qualified; green (RoHS-compliant); validated for 15-year field life in harsh vibration/thermal cycling environments.

Applications

Engine Control Unit (ECU) Power Rail

Body Control Module (BCM) Logic Supply

Use Scenario: Powers microcontroller, CAN transceivers, and sensor interfaces in gasoline/diesel engine management systems.

IC Role / Device Role / Timing Role: Primary 5 V LDO supplying safety-critical digital subsystems with tight voltage tolerance and fast transient response.

Use Value: ±4% output accuracy ensures reliable ADC reference and logic-level compatibility; 400 mA headroom supports multi-peripheral integration.

Use Scenario: Supplies 5 V to door lock actuators, interior lighting drivers, and LIN transceivers in vehicle body electronics.

IC Role / Device Role / Timing Role: Local point-of-load regulator decoupled from main 12 V battery rail, immune to load dump transients.

Use Value: Reverse-polarity and short-circuit protection eliminate field failures from wiring errors or actuator stalls.

Advanced Driver Assistance Systems (ADAS) Camera Module

Infotainment System Telematics Unit

Use Scenario: Provides clean 5 V to image sensor and ISP in front/rear-view cameras mounted near engine bay.

IC Role / Device Role / Timing Role: Low-noise, thermally robust LDO operating in high-ambient-temperature zones (>105 °C ambient).

Use Value: 4 K/W R_th,j-c enables direct PCB copper heatsinking; eliminates need for discrete thermal interface materials.

Use Scenario: Powers GPS/GNSS receiver, cellular modem, and secure boot controller in connected infotainment head units.

IC Role / Device Role / Timing Role: Always-on 5 V supply with ultra-low shutdown current supporting wake-on-LIN/CAN functionality.

Use Value: <10 µA I_q in INH mode extends backup battery life during vehicle park mode (ISO 16750-2 Class D).

Equivalent & Alternatives

The following parts are listed as comparable options for similar fixed-output automotive LDO applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLV73350PDBVR	300 mA max output; lower dropout (170 mV @ 300 mA); SOT-23-5 package; not AEC-Q100 qualified.	Limited to non-safety-critical cabin modules; unsuitable for under-hood use above 105 °C ambient.	Select only for cost-sensitive, space-constrained interior applications with <300 mA load and no AEC requirement.
NCV8664CDT50RKG	500 mA output; wider input range (4.5–45 V); ±2% tolerance; DPAK package; AEC-Q100 Grade 1.	Higher precision and current capability; larger footprint; higher quiescent current (35 µA shutdown).	Prefer when tighter voltage accuracy (<±2%) or >400 mA margin is required, and PCB area permits DPAK.

Compared with TLV73350PDBVR and NCV8664CDT50RKG, the TLE4276DV50ATMA2 delivers optimal balance of AEC-Q100 compliance, thermal performance (4 K/W), and ultra-low shutdown current (<10 µA), making it preferred for compact, thermally constrained engine-bay regulators where reliability is paramount.

Availability

TLE4276DV50ATMA2 is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS camera power supplies, and telematics units requiring stable component supply with automotive-grade qualification and long-term lifecycle support.

Supply support for TLE4276DV50ATMA2 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 AG is a German semiconductor manufacturer specializing in power management, automotive ICs, and security solutions, with global manufacturing and automotive qualification infrastructure.

The OPTIREG™ linear product line delivers robust, AEC-Q100-qualified voltage regulators optimized for automotive power domains - emphasizing thermal resilience, fault tolerance, and long-term reliability in harsh environments.

FAQ

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

The TLE4276DV50ATMA2 requires input voltage ≥5.25 V (V_Q + 0.25 V) to maintain regulation at 400 mA, based on max dropout of 500 mV. At 250 mA, minimum input is 5.25 V; actual start-up threshold is VI ≥4.5 V per operating range table, but full-load regulation begins at ≥5.25 V.

Can the N.C. pin (Pin 4) be used as a heatsink connection?

No. Pin 4 is internally unconnected and must remain floating - it is not electrically tied to the die pad or GND. The exposed thermal pad (heatsink) is connected to Pin 3 (GND) and must be soldered to a dedicated GND copper pour; using Pin 4 for thermal conduction violates the PG-TO252-5 mechanical design and risks shorting.

Does the device require an external voltage divider for the TLE4276DV50ATMA2 variant?

No. The "V50" suffix denotes the fixed 5.0 V output version; the voltage adjust (VA) pin is not functional and corresponds to Pin 4 (N.C.). Only adjustable variants (e.g., TLE4276DV) use Pin 4 as VA input with external resistor divider; this part has no VA functionality.

How does the inhibit function interact with thermal shutdown?

INH takes priority over thermal shutdown: when INH = low, the device enters ultra-low-I_q state regardless of temperature. If INH = high and junction temperature exceeds ~150 °C, thermal shutdown overrides normal operation and forces output disable - independent of INH state. Recovery occurs only after T_j drops below hysteresis threshold (~140 °C) and INH remains high.

TLE4276DV50ATMA2 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: OPTIREG™

Package/Case:: TO-252-5, DPAK (4 Leads + Tab), TO-252AD

Packaging:: Tape & Reel (TR)

Product Status:: Last Time Buy

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):: 200 µA

Current - Supply (Max):: 25 mA

PSRR:: 54dB (100Hz)

Control Features:: Inhibit

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

Operating Temperature:: -40°C ~ 150°C

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: PG-TO252-5-1

TLE4276DV50ATMA2 FAQ

1.How can I place an order for TLE4276DV50ATMA2 through Aetrix?

Please submit a Request for Quotation (RFQ) for TLE4276DV50ATMA2 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 TLE4276DV50ATMA2 reliable?

The price and inventory of TLE4276DV50ATMA2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLE4276DV50ATMA2 is usually 5 days.

3.What payment methods are accepted for TLE4276DV50ATMA2?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLE4276DV50ATMA2 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TLE4276DV50ATMA2?

TLE4276DV50ATMA2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TLE4276DV50ATMA2 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 TLE4276DV50ATMA2?

For technical support, including TLE4276DV50ATMA2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLE4276DV50ATMA2 requirements.

6.How does Aetrix verify that TLE4276DV50ATMA2 is sourced from the original manufacturer or authorized distributors?

All TLE4276DV50ATMA2 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 TLE4276DV50ATMA2 meets industry standards.

7.What is the process for return or replacement of TLE4276DV50ATMA2?

All TLE4276DV50ATMA2 units undergo pre-shipment inspection (PSI). If there is an issue with TLE4276DV50ATMA2, 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 TLE4276DV50ATMA2 part is unused and in its original packaging.

Return procedure for TLE4276DV50ATMA2:

1.Submit a request within 90 days.

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

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