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

Infineon Technologies TLE4268GSXUMA2

Name: TLE4268GSXUMA2
Brand: Infineon Technologies
SKU: TLE4268GSXUMA2
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TLE4268GSXUMA2

Manufacturer:: Infineon Technologies

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

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

Datasheet:: TLE4268GSXUMA2.pdf

Description:: IC REG LINEAR 5V 150MA DSO8-16

Quantity:: RFQ Add To RFQ list

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Inventory:2,601

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Product details

Overview

TLE4268GSXUMA2 from Infineon Technologies is a 5-V low-drop fixed-voltage regulator with integrated watchdog, reset generator, reverse polarity protection, and overtemperature shutdown. It delivers ≥180 mA output current at ≤0.5 V drop (VI = 13.5 V, IQ = 150 mA), supports 5.5–45 V input range, and operates across −40 °C to +150 °C junction temperature-designed for automotive power supply monitoring in engine control units.

For engineers reviewing the TLE4268GSXUMA2 datasheet, TLE4268GSXUMA2 pinout, TLE4268GSXUMA2 application, or TLE4268GSXUMA2 equivalent, key selection criteria include reset threshold adjustability (via RADJ pin), watchdog activation threshold (≥8 mA load), reset delay tuning (external capacitor), and PG-DSO-8 package thermal resistance (R_thj-a = 185 K/W).

Technical Context

The device uses a bandgap-referenced control amplifier to regulate output voltage while implementing saturation control on the series pass transistor to prevent over-saturation under varying load. Its reset generator monitors scaled output voltage at RADJ; when voltage falls below 1.35 V (typ.), it discharges an external capacitor until lower timing threshold (0.4 V typ.) triggers open-collector RO low.

Watchdog logic activates only above 8 mA load current and responds to rising edges at W pin; missing pulses cause RO to go low after adjustable delay (30–75 ms typ. with 100 nF). Protection circuits independently enforce reverse polarity blocking, thermal shutdown (>150 °C), and short-circuit current limiting.

Key Specifications

Parameter	Value and Actual Design Meaning
Output voltage	5.00 V ±2% (4.90–5.10 V) at 5–150 mA load ensures stable MCU core supply under battery variation.
Drop voltage	0.25–0.50 V at 150 mA enables operation down to 5.5 V input-critical for cold-crank automotive conditions.
Reset threshold	Adjustable 4.2–4.8 V via RADJ pin; grounded RADJ sets fixed 4.5 V trigger for brown-out detection.
Watchdog period	30–75 ms (typ. 55 ms with 100 nF) provides configurable timeout for microcontroller activity monitoring.
Thermal resistance	R_thj-a = 185 K/W (PG-DSO-8) defines PCB copper area requirement for 125 °C max. junction temp at full load.
Quiescent current	13–20 mA at 150 mA output enables accurate system-level power budgeting in always-on modules.
Operating temp	−40 °C to +150 °C junction range meets AEC-Q100 Grade 0 for under-hood automotive placement.

Pinout & Package

Package: PG-DSO-8 (RoHS-compliant, lead-free, exposed pad for thermal enhancement).

Pin/Terminal	Circuit Role	Design Meaning
1 (I)	Input voltage	Accepts 5.5–45 V unregulated supply; requires local ceramic decoupling per layout guidelines.
2 (N.C.)	Not connected	No internal connection; must remain floating or tied to GND per PCB routing constraints.
3 (RO)	Reset output	Open-collector output pulled up to VQ via 30 kΩ internal resistor; drives external reset line low on fault.
4 (GND)	Ground	Main power return path; connects to thermal pad and PCB ground plane for thermal and EMI performance.
5 (D)	Reset delay	Connects external capacitor to GND to set reset pulse width (10–25 ms typ. with 100 nF).
6 (RADJ)	Reset switching threshold	Voltage divider input setting reset trip point; 0 V → 4.5 V trigger; 1.35 V → 4.5 V × (V_REF/1.35).
7 (W)	Watchdog input	Positive-edge-triggered; requires ≥25 ms pulse interval to avoid false reset during MCU sleep modes.
8 (Q)	5 V output	Regulated output; requires 22 μF/ESR < 3 Ω bulk capacitor directly at pin for stability.

Key Features

Feature	Design Value
Integrated watchdog with load-gated enable	Activates only above 8 mA load-prevents spurious resets during MCU deep-sleep states.
Adjustable reset threshold	RADJ pin accepts 0–7 V input to scale reset trigger from 4.2 V to 4.8 V without external comparators.
Low-drop architecture	0.25 V typical drop at 150 mA allows use with degraded 6 V battery during cranking.
Reverse polarity protection	Blocks current flow if input is connected backward-eliminates need for external series diode.
AEC-Q100 qualified	Validated for automotive Grade 0 (−40 °C to +150 °C) per stress test requirements.

Applications

Engine Control Unit (ECU) Power Monitoring

Body Control Module (BCM) Reset Management

Use Scenario: Regulates 12 V battery-derived supply to 5 V for MCU and sensors while detecting undervoltage events during cold start.

IC Role / Device Role / Timing Role: Primary 5 V regulator with programmable brown-out detection and watchdog supervision of main controller.

Use Value: Enables fail-safe shutdown before MCU corruption occurs; RADJ pin allows matching reset threshold to specific sensor rail tolerance.

Use Scenario: Powers CAN transceiver and door-lock MCU in vehicle body network, responding to ignition-off voltage decay.

IC Role / Device Role / Timing Role: Provides regulated 5 V and generates timed reset pulse upon battery disconnect to clear volatile memory.

Use Value: D pin sets 15 ms reset hold time (with 100 nF) ensuring clean state initialization after wake-up from sleep mode.

Transmission Control Module (TCM) Thermal Safety

Advanced Driver Assistance System (ADAS) Camera Power

Use Scenario: Supplies vision processor in automatic transmission ECU where high ambient temperature demands robust thermal protection.

IC Role / Device Role / Timing Role: Voltage regulator with integrated overtemperature shutdown and watchdog for safety-critical firmware execution.

Use Value: Joints thermal shutdown (150 °C) with watchdog timeout to force controlled reboot before thermal runaway affects gear shifting logic.

Use Scenario: Powers image sensor and ISP in rear-view camera module mounted near exhaust manifold.

IC Role / Device Role / Timing Role: Low-noise 5 V source with reverse polarity protection against incorrect service wiring.

Use Value: Eliminates need for external reverse-blocking diode-reducing BOM count and forward voltage loss in space-constrained camera housing.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 5-V automotive voltage regulator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLV73350PDBVR	Lower IQ (25 μA typ.), no watchdog/reset, SOT-23-5 package, 200 mA rating.	Lacks reset supervision and thermal shutdown-requires external circuitry for functional safety compliance.	Select only for non-safety-critical infotainment peripherals where size and quiescent current dominate.
MAX16126ATA+T	3.3 V fixed output, integrated window watchdog, 200 mA, TDFN-8 package, −40 °C to +125 °C.	Fixed 3.3 V output and narrower temp range limit use to cabin electronics-not under-hood systems.	Choose when system uses 3.3 V logic and requires tighter watchdog timing control than TLE4268 offers.

Compared with TLV73350PDBVR and MAX16126ATA+T, TLE4268GSXUMA2 uniquely combines 5 V regulation, AEC-Q100 Grade 0 qualification, adjustable reset, and load-gated watchdog in a single PG-DSO-8 package-making it irreplaceable for ASIL-B–aligned power domains requiring autonomous fault response.

Availability

TLE4268GSXUMA2 is available at Aetrix Electronics and suitable for engine control units, body control modules, transmission control modules, and ADAS camera power supplies requiring stable component supply across automotive production lifecycles.

Supply support for TLE4268GSXUMA2 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 ICs, and security solutions, with global R&D and manufacturing infrastructure.

The TLE family targets automotive power system design-delivering integrated voltage regulation, supervision, and protection functions for ECU, BCM, and ADAS subsystems operating in harsh environments.

FAQ

What is the minimum input voltage required for regulation?

The TLE4268GSXUMA2 begins regulating at VI ≥ 5.5 V, maintaining 5.0 V output with ≤2% tolerance. Below this, output drops linearly with input. This 5.5 V threshold ensures reliable operation during automotive cold-crank events where battery voltage dips to 6 V, and accounts for trace resistance and diode drops in front-end protection networks.

How does the watchdog function interact with microcontroller sleep modes?

The watchdog activates only when load current exceeds 8 mA, which corresponds to active MCU operation. During sleep modes drawing <8 mA, the watchdog remains disabled-preventing unintended resets. Pulse recognition requires rising edges at W pin with ≥25 ms interval; shorter intervals are ignored to tolerate clock jitter or noise.

Can the reset threshold be set below 4.2 V?

No-the internal reference and comparator design limit the adjustable reset threshold to 4.2–4.8 V. Grounding RADJ yields the lowest possible trigger at 4.5 V; applying negative voltage or exceeding 7 V at RADJ violates absolute maximum ratings and may damage the pin. External resistor dividers must keep RADJ within −0.3 V to +7 V.

Is thermal pad soldering mandatory for PG-DSO-8 package reliability?

Yes-thermal pad soldering to a dedicated PCB copper pour is mandatory to achieve R_thj-a = 185 K/W and sustain 150 mA continuous output at 125 °C ambient. Omitting pad connection raises junction temperature by >40 °C under full load, risking premature thermal shutdown and violating AEC-Q100 lifetime requirements.

TLE4268GSXUMA2 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: OPTIREG™

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

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Output Configuration:: Positive

Output Type:: Fixed

Number of Regulators:: 1

Voltage - Input (Max):: 45V

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

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.5V @ 150mA

Current - Output:: 150mA

Current - Quiescent (Iq):: 450 µA

Current - Supply (Max):: 20 mA

PSRR:: -

Control Features:: Reset, Watchdog

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

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

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: PG-DSO-8-16

TLE4268GSXUMA2 FAQ

1.How can I place an order for TLE4268GSXUMA2 through Aetrix?

Please submit a Request for Quotation (RFQ) for TLE4268GSXUMA2 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 TLE4268GSXUMA2 reliable?

The price and inventory of TLE4268GSXUMA2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLE4268GSXUMA2 is usually 5 days.

3.What payment methods are accepted for TLE4268GSXUMA2?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLE4268GSXUMA2 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TLE4268GSXUMA2?

TLE4268GSXUMA2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TLE4268GSXUMA2 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 TLE4268GSXUMA2?

For technical support, including TLE4268GSXUMA2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLE4268GSXUMA2 requirements.

6.How does Aetrix verify that TLE4268GSXUMA2 is sourced from the original manufacturer or authorized distributors?

All TLE4268GSXUMA2 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 TLE4268GSXUMA2 meets industry standards.

7.What is the process for return or replacement of TLE4268GSXUMA2?

All TLE4268GSXUMA2 units undergo pre-shipment inspection (PSI). If there is an issue with TLE4268GSXUMA2, 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 TLE4268GSXUMA2 part is unused and in its original packaging.

Return procedure for TLE4268GSXUMA2:

1.Submit a request within 90 days.

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

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