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Infineon Technologies TLE4279GXUMA2
- Part No.:
- TLE4279GXUMA2
- Manufacturer:
- Infineon Technologies
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TLE4279GXUMA2.pdf
- Description:
- IC REG LINEAR 5V 100MA DSO8-16
- Quantity:
- Payment:
- Shipping:
Inventory:4,067
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Product details
Overview
TLE4279GXUMA2 from Infineon Technologies is a monolithic linear voltage regulator delivering a fixed 5 V output at up to 100 mA, featuring integrated short-circuit and thermal shutdown protection, reverse-polarity protection, and built-in reset delay for microcontroller power supply in automotive body electronics.
For engineers reviewing the TLE4279GXUMA2 datasheet, TLE4279GXUMA2 pinout, TLE4279GXUMA2 application, or TLE4279GXUMA2 equivalent, key selection criteria include its 5 V ±2% output accuracy over temperature, -40 °C to +150 °C operating range, 45 V maximum input voltage, and integrated watchdog timer with programmable timeout.
Technical Context
The TLE4279GXUMA2 integrates a precision bandgap reference, error amplifier, pass transistor, and protection circuitry in a single DSO-8 package. It operates as a low-dropout (LDO) regulator with typical dropout voltage of 0.6 V at 100 mA load and supports input voltages from 5.5 V to 45 V.
Its embedded watchdog function monitors an external microcontroller via the WDI input and generates a reset pulse on the RESET output if no valid toggle occurs within the selected timeout window (1.6 s or 3.2 s). The device also provides a power-on reset signal synchronized to VOUT ramp-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±2% - ensures stable MCU core and I/O rail across automotive temperature and load conditions. |
| Max Output Current | 100 mA - sufficient for powering small microcontrollers, sensors, and interface ICs in body control modules. |
| Input Voltage Range | 5.5 V to 45 V - accommodates 12 V and 24 V automotive battery systems including load dump transients. |
| Dropout Voltage | 0.6 V @ 100 mA - enables regulation down to ~5.6 V input, critical during cold-crank scenarios. |
| Operating Temperature | -40 °C to +150 °C - qualified per AEC-Q100 Grade 1, suitable for under-hood and cabin-mounted ECUs. |
| Reset Threshold | VOUT ≥ 4.65 V - guarantees clean release of downstream logic after power stabilization. |
Pinout & Package
Package: DSO-8 (Dual Small Outline, 8-pin, exposed thermal pad, RoHS-compliant).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Main input supply | Accepts 5.5–45 V battery input; internal clamp protects against load dump up to 45 V. |
| GND | Power ground | Reference node for all internal circuits and output regulation; connects to thermal pad for heat dissipation. |
| VOUT | Regulated output | Delivers stable 5 V ±2% to connected loads; includes internal soft-start and current limiting. |
| WDI | Watchdog input | CMOS-level toggle input; absence of edge for >1.6 s or >3.2 s triggers reset assertion. |
| RESET | Reset output | Open-drain active-low output; asserts when VOUT < 4.65 V or watchdog timeout occurs. |
| EN | Enable input | Active-high logic input; disables regulator and resets watchdog when pulled low. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated watchdog timer | Two selectable timeouts (1.6 s / 3.2 s) provide flexible MCU supervision without external components. |
| Reverse-polarity protection | Withstands -16 V input without damage-eliminates need for external series diode in battery-reversal-prone environments. |
| Thermal shutdown with hysteresis | Triggers at +170 °C and releases at +150 °C-prevents latch-up and enables safe recovery after overload. |
| Short-circuit proof output | Limits current to ~250 mA during output short-maintains functionality and avoids system-level fuse blow. |
Applications
| Body Control Module (BCM) | Door Control Unit (DCU) |
|---|---|
Use Scenario: Powering 8-bit microcontroller, LIN transceiver, and position sensors in vehicle door latch assembly. IC Role / Device Role / Timing Role: Primary 5 V LDO regulator with integrated watchdog supervision and reset generation. Use Value: Eliminates discrete reset IC and external watchdog circuit, reducing BOM count by two components and PCB area by >12 mm². | Use Scenario: Supplying power and reset signaling to MCU-based mirror adjustment and window lift control. IC Role / Device Role / Timing Role: Regulator + supervisor IC providing fault-tolerant 5 V rail and fail-safe reset during battery transients. Use Value: Withstands cold-crank (down to 5.5 V VIN) and load dump (up to 45 V), ensuring uninterrupted operation in 12 V systems. |
| Seat Control Module | Lighting Control Unit (LCU) |
Use Scenario: Powering MCU and motor driver logic in electric seat memory and adjustment systems. IC Role / Device Role / Timing Role: Regulated 5 V source with EN-controlled shutdown for sleep-mode current reduction. Use Value: Enables <10 µA quiescent current in disable mode-critical for meeting ISO 16750-2 parasitic drain limits. | Use Scenario: Providing regulated 5 V and supervised reset to LED driver ICs and ambient light sensor interfaces. IC Role / Device Role / Timing Role: System power supervisor with accurate reset threshold and glitch-free reset release. Use Value: Reset deassertion only after VOUT reaches 4.65 V with 100 µs delay-prevents premature MCU wake-up during brown-out recovery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive LDO + watchdog regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLE4276-2G | Fixed 5 V output, no watchdog function; lower quiescent current (45 µA vs. 120 µA). | Lacks reset supervision-requires external watchdog or MCU-integrated reset monitoring. | Select when system-level watchdog is already implemented and lowest IQ is prioritized. |
| TLF4941-2ES | 5 V output, integrated watchdog with adjustable timeout (via external capacitor), higher max current (150 mA). | Requires external RC network for timeout setting; larger footprint than DSO-8. | Select when programmable watchdog timing or higher output current is required. |
Compared with TLE4276-2G, the TLE4279GXUMA2 adds integrated watchdog supervision at the cost of higher IQ; compared with TLF4941-2ES, it offers fixed timeout and smaller DSO-8 footprint but less flexibility in timing configuration.
Availability
TLE4279GXUMA2 is available at Aetrix Electronics and suitable for automotive body electronics, door control units, and seat control modules requiring stable component supply, AEC-Q100 qualification, and integrated power-supervision functionality.
Supply support for TLE4279GXUMA2 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 TLE4279GXUMA2 belongs to Infineon's TLE family of automotive-grade linear regulators, designed specifically for robust, integrated power supply and supervision in body electronics ECUs.
FAQ
What is the watchdog timeout behavior of the TLE4279GXUMA2?
The watchdog timeout is factory-set to either 1.6 s or 3.2 s depending on wafer lot; toggling the WDI pin within that interval prevents RESET assertion. If no valid edge occurs, RESET goes low and remains asserted until WDI receives a new edge or EN is cycled.
Can the TLE4279GXUMA2 be used in 24 V commercial vehicle applications?
Yes-the device supports input voltages up to 45 V and operates from −40 °C to +150 °C, making it suitable for 24 V truck and bus ECUs. Its reverse-polarity protection (−16 V) and load-dump immunity meet ISO 7637-2 Pulse 5a requirements.
Does the RESET output require an external pull-up resistor?
Yes-RESET is an open-drain output and must be pulled up externally (typically to VOUT or another 5 V rail) with a 4.7 kΩ to 10 kΩ resistor to ensure proper logic high level and noise immunity in automotive environments.
How does the TLE4279GXUMA2 handle cold-crank conditions?
It maintains regulation down to 5.5 V input with 100 mA load and 0.6 V dropout, allowing continuous operation during engine cranking where battery voltage may dip to 6 V. Output remains within 5 V ±2% once input exceeds 5.6 V.
TLE4279GXUMA2 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 @ 100mA
- Current - Output:
- 100mA
- Current - Quiescent (Iq):
- 300 µA
- Current - Supply (Max):
- 8 mA
- PSRR:
- -
- Control Features:
- Reset
- Protection Features:
- 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-DSO-8-16
TLE4279GXUMA2 FAQ
1.How can I place an order for TLE4279GXUMA2 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLE4279GXUMA2 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 TLE4279GXUMA2 reliable?
The price and inventory of TLE4279GXUMA2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLE4279GXUMA2 is usually 5 days.
3.What payment methods are accepted for TLE4279GXUMA2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLE4279GXUMA2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLE4279GXUMA2?
TLE4279GXUMA2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLE4279GXUMA2 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 TLE4279GXUMA2?
For technical support, including TLE4279GXUMA2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLE4279GXUMA2 requirements.
6.How does Aetrix verify that TLE4279GXUMA2 is sourced from the original manufacturer or authorized distributors?
All TLE4279GXUMA2 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 TLE4279GXUMA2 meets industry standards.
7.What is the process for return or replacement of TLE4279GXUMA2?
All TLE4279GXUMA2 units undergo pre-shipment inspection (PSI). If there is an issue with TLE4279GXUMA2, 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 TLE4279GXUMA2 part is unused and in its original packaging.
Return procedure for TLE4279GXUMA2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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