Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Infineon Technologies TLE4268GSXUMA1

Name: TLE4268GSXUMA1
Brand: Infineon Technologies
SKU: TLE4268GSXUMA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: TLE4268GSXUMA1

Manufacturer:: Infineon Technologies

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

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

Datasheet:: TLE4268GSXUMA1.pdf

Description:: IC REG LINEAR 5V 180MA DSO8-16

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:2,109

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

TLE4268GSXUMA1 from Infineon Technologies is a 5-V low-drop fixed-voltage regulator with ±2% output tolerance, 180 mA output current capability, and integrated watchdog/reset functions. It operates from 5.5 V to 45 V input, features reverse polarity and overtemperature protection, and is AEC-Q100 qualified for automotive power supply rails in engine control units and body electronics.

For engineers reviewing the TLE4268GSXUMA1 datasheet, TLE4268GSXUMA1 pinout, TLE4268GSXUMA1 application, or TLE4268GSXUMA1 equivalent, key selection criteria include reset threshold adjustability (via RADJ), watchdog activation threshold (≥8 mA load), reset delay tuning (external capacitor), and PG-DSO-8 thermal resistance (R_thj-a = 185 K/W).

Technical Context

The device uses a bandgap-referenced control amplifier driving a series pass transistor with saturation control to maintain regulation across load and line variations. Its reset generator monitors scaled output voltage at RADJ and triggers RO when V_Q falls below 4.2–4.8 V, with delay set by external capacitor on D pin.

The watchdog logic responds to positive edges on W pin; missing pulses within 30–75 ms (CD = 100 nF) force RO low. Watchdog activation requires ≥2 mA but only engages above 8 mA load, preventing spurious resets during microcontroller sleep mode.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	5.00 V ±2% (4.90–5.10 V); stable under 5–150 mA load and 6–28 V input.
Drop Voltage	0.25–0.50 V at 150 mA; enables operation with VI as low as 5.5 V while maintaining regulation.
Reset Threshold	Adjustable 4.2–4.8 V via RADJ pin; grounded RADJ sets fixed 4.5 V trigger point.
Watchdog Activation	Requires ≥8 mA load; prevents false resets during MCU deep-sleep states.
Thermal Resistance	R_thj-a = 185 K/W (PG-DSO-8); limits max continuous power dissipation to ~360 mW at T_j = 125 °C.
Operating Temp	-40 °C to +150 °C junction; validated for under-hood automotive environments.
Protection Features	Reverse polarity, short-circuit, overtemperature, and overload - all internally implemented without external components.

Pinout & Package

Package: PG-DSO-8 (8-pin exposed pad SOIC variant, RoHS-compliant, AEC-Q100 qualified).

Pin/Terminal	Circuit Role	Design Meaning
1 (I)	Input voltage supply	Accepts 5.5–45 V; requires local ceramic decoupling directly at pin.
2 (N.C.)	No connection	Internally unconnected; must remain floating or grounded per layout guidelines.
3 (RO)	Open-collector reset output	Pulled low when reset condition occurs; internal 30 kΩ pull-up to Q (5 V) in DSO-20 variant - not present in DSO-8.
4 (GND)	Power ground reference	Main return path; connects to thermal pad for heat dissipation in PG-DSO-8.
5 (D)	Reset delay timing node	Connects external capacitor to GND to set reset pulse width (10–25 ms typical with 100 nF).
6 (RADJ)	Reset threshold adjustment	Voltage divider input; sets V_RT from 4.2–4.8 V; grounded → 4.5 V trigger.
7 (W)	Watchdog input	Positive-edge-triggered; monitors MCU activity; disabled below 8 mA load.
8 (Q)	Regulated 5 V output	Delivers up to 180 mA; requires 22 μF/ESR < 3 Ω bulk capacitor at pin.

Key Features

Feature	Design Value
±2% output voltage tolerance	Ensures reliable logic-level compatibility with 5 V microcontrollers without post-regulation trimming.
Adjustable reset threshold (RADJ)	Enables system-specific brown-out detection without redesigning voltage-divider networks.
Load-dependent watchdog enable	Eliminates unintended resets during MCU sleep modes by disabling watchdog below 8 mA load.
Integrated overtemperature shutdown	Halts output conduction at T_j ≥ 150 °C, protecting downstream circuitry during thermal fault conditions.
AEC-Q100 Grade 1 qualification	Validated for automotive applications with operating range -40 °C to +125 °C ambient (T_j ≤ 150 °C).

Applications

Engine Control Unit (ECU) Power Rail

Body Control Module (BCM) Supply

Use Scenario: Regulating battery-derived 12 V to stable 5 V for ECU microcontroller and sensor interface ICs under cranking (6.5 V) and load-dump (40 V) transients.

IC Role / Device Role / Timing Role: Primary 5 V LDO with reset supervision and watchdog monitoring of main MCU.

Use Value: Maintains regulation down to 5.5 V input and survives 45 V transients; reset signal halts firmware execution before undervoltage corruption.

Use Scenario: Powering door module MCUs and LIN transceivers in vehicle interior systems with variable battery voltage and intermittent loads.

IC Role / Device Role / Timing Role: System supervisor LDO providing regulated 5 V, brown-out detection, and activity monitoring for sleep/wake integrity.

Use Value: RADJ-adjustable reset threshold avoids false triggers during slow battery discharge; watchdog confirms MCU responsiveness after wake events.

Advanced Driver Assistance Systems (ADAS) Camera Module

Automotive Infotainment Head Unit

Use Scenario: Supplying image signal processor and serializer ICs in rear-view camera modules mounted near exhaust or engine bay.

IC Role / Device Role / Timing Role: High-temp-stable 5 V regulator with thermal shutdown and reverse-polarity protection.

Use Value: R_thj-a = 185 K/W and 150 °C max T_j rating ensure reliability in high-ambient zones; reverse polarity guard prevents damage during service wiring errors.

Use Scenario: Providing clean 5 V rail to audio DSP, display controller, and USB PHY in head units with multiple power domains.

IC Role / Device Role / Timing Role: Secondary regulated supply with reset coordination across subsystems during ignition cycling.

Use Value: Reset delay capacitor (D pin) synchronizes power-on sequencing with other regulators; open-collector RO allows wired-OR reset bus integration.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 5 V automotive LDO with reset/watchdog applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLV70750PDBVR	Lower IQ (25 µA typ), no watchdog or adjustable reset; 200 mA output; SOT-23-5 package.	Lacks system supervision features; suitable only for basic regulation where reset/watchdog are handled externally.	Select when footprint and quiescent current are critical, and supervision is implemented separately.
MAX16126ATA+T	3.3 V fixed output; includes power-good flag instead of reset output; higher dropout (0.45 V @ 200 mA); TDFN-8.	Not pin- or function-compatible; targets 3.3 V logic domains with different fault signaling (PG vs RO).	Choose only if system requires 3.3 V and power-good assertion rather than active-low reset.

Compared with TLV70750PDBVR and MAX16126ATA+T, TLE4268GSXUMA1 uniquely integrates adjustable reset threshold, load-gated watchdog, and AEC-Q100 qualification in PG-DSO-8 - making it irreplaceable for automotive 5 V MCU supply supervision where functional safety and transient resilience are mandatory.

Availability

TLE4268GSXUMA1 is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS camera modules, and infotainment head units requiring stable component supply under AEC-Q100 compliance and extended temperature operation.

Supply support for TLE4268GSXUMA1 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 manufacturing and automotive qualification infrastructure.

The TLE family delivers AEC-Q100-qualified linear regulators and system basis chips designed specifically for automotive power supply and supervision in harsh environments - emphasizing robustness, thermal resilience, and functional safety readiness.

FAQ

What is the minimum input voltage required for regulation?

The TLE4268GSXUMA1 maintains 5 V regulation down to 5.5 V input under full load. Below this, output drops linearly with input due to insufficient headroom across the pass element. The 0.25 V typical drop voltage at 150 mA means regulation holds until VI falls below V_Q + V_DR ≈ 5.25 V - verified across -40 °C to +125 °C junction temperature.

How is the reset delay time adjusted?

Reset delay is set by an external capacitor connected between pin 5 (D) and GND. With C_D = 100 nF, typical delay is 15 ms (range 10–25 ms). Delay scales approximately linearly with capacitance; doubling C_D doubles trd. No resistor is needed - internal current sources charge/discharge the capacitor to defined voltage thresholds (VDL = 0.4 V, VDU = 1.8 V).

Does the watchdog require external components to operate?

No external components are required for basic watchdog operation. The W pin accepts standard CMOS-level positive-edge pulses from a microcontroller GPIO. Internal circuitry provides precise timing (30–75 ms window with 100 nF capacitor on D pin) and automatic disable below 8 mA load - eliminating need for external enable logic or pull-ups.

Is the PG-DSO-8 package thermally enhanced?

Yes - the PG-DSO-8 package includes an exposed thermal pad on the underside, electrically connected to GND (pin 4), which must be soldered to a large PCB copper area for effective heat dissipation. Thermal resistance from junction to ambient is 185 K/W under standard JEDEC test conditions (80 × 80 mm² board, zero airflow), enabling safe operation up to 125 °C ambient at full 180 mA load.

TLE4268GSXUMA1 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:: 180mA

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

TLE4268GSXUMA1 FAQ

1.How can I place an order for TLE4268GSXUMA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for TLE4268GSXUMA1 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 TLE4268GSXUMA1 reliable?

The price and inventory of TLE4268GSXUMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLE4268GSXUMA1 is usually 5 days.

3.What payment methods are accepted for TLE4268GSXUMA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLE4268GSXUMA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TLE4268GSXUMA1?

TLE4268GSXUMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TLE4268GSXUMA1 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 TLE4268GSXUMA1?

For technical support, including TLE4268GSXUMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLE4268GSXUMA1 requirements.

6.How does Aetrix verify that TLE4268GSXUMA1 is sourced from the original manufacturer or authorized distributors?

All TLE4268GSXUMA1 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 TLE4268GSXUMA1 meets industry standards.

7.What is the process for return or replacement of TLE4268GSXUMA1?

All TLE4268GSXUMA1 units undergo pre-shipment inspection (PSI). If there is an issue with TLE4268GSXUMA1, 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 TLE4268GSXUMA1 part is unused and in its original packaging.

Return procedure for TLE4268GSXUMA1:

1.Submit a request within 90 days.

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

Tech Hub

2026-07-29 18650 Battery: Voltage, Capacity, Charging and Pack Design

18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…

2026-07-27 Hall Effect Sensor: Working Principle, Types, Circuits and Applications

Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…

2026-07-20 Product Change Notification (PCN) in Electronic Components: Meaning and Supply Chain Response

Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…

2026-07-19 Blend Door Actuator: Symptoms, Location, Reset and Replacement Guide

A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…

2026-07-17 Raspberry Pi Alternatives: Chip-Level Comparison, Compatibility and Replacement Guide

Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…

2026-07-13 How to Test Dynamic Load Response in Low-Voltage High-Current Buck Converters

Engineering guide to dynamic load response testing for high-current buck converters, covering load step setup, slew rate, Vcore undershoot, overshoot, recovery time, probe location, output capacitors a…

2026-07-08 Output Capacitor Selection for High-Current ASIC Vcore Rails

Engineering guide to output capacitor selection for ASIC Vcore rails, covering bulk capacitors, polymer capacitors, MLCC decoupling, DC bias, ESR, ESL, placement, transient response and substitution ri…

2026-07-07 High-Current ASIC Core Power Supply Design: 12-Phase Buck, PMBus and Dynamic Load Response

Engineering guide to high-current ASIC Vcore rails, covering 12-phase buck architecture, PMBus control, dynamic load testing, output capacitor networks, smart power stage selection, thermal design and …

2026-07-06 Voltage Regulator: Types, Circuits, Testing and Selection Guide

Voltage regulator guide covering linear, LDO, 7805, Zener, adjustable, buck, VRM and alternator regulators, with design checks, testing methods, troubleshooting and datasheet-based selection.

2026-06-30 Amplifiers Explained: Types, Circuits, Gain, Classes and Applications

Amplifier guide covering voltage, current and power amplification, gain, feedback, amplifier classes, audio and RF applications, op-amp circuits, transimpedance amplifiers, datasheet selection and trou…