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Infineon Technologies TLE4276 V85
- Part No.:
- TLE4276 V85
- Manufacturer:
- Infineon Technologies
- Package:
- TO-220-5 Formed Leads
- Datasheet:
-
TLE4276 V85.pdf
- Description:
- IC REG LIN 8.5V 400MA TO220-5-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,164
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Product details
Overview
TLE4276 V85 from Infineon Technologies is a monolithic linear voltage regulator delivering a fixed 8.5 V output with up to 400 mA load current, integrated short-circuit and thermal shutdown protection, and designed for automotive power supply rails in engine control units and body electronics.
For engineers reviewing the TLE4276 V85 datasheet, TLE4276 V85 pinout, TLE4276 V85 application, or TLE4276 V85 equivalent, key selection criteria include dropout voltage at 400 mA, quiescent current in standby mode, load dump immunity per ISO 7637-2, and AEC-Q100 Grade 1 qualification for under-hood operation.
Technical Context
The TLE4276 V85 operates as a low-dropout (LDO) linear regulator using bipolar technology, with internal bandgap reference and error amplifier driving a Darlington pass transistor. It features active current limiting that transitions smoothly into foldback during overload.
Its protection architecture includes reversible thermal shutdown with hysteresis, reverse-battery protection down to –16 V, and transient overvoltage clamping compliant with ISO 7637-2 Pulse 5a (load dump up to 60 V). The device maintains regulation over input voltages from 5.5 V to 45 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 8.5 V ±2%, stable across temperature and line/load variations for powering microcontrollers and sensors. |
| Max Output Current | 400 mA continuous, enabling direct supply of ECUs with multiple peripherals without external boost stages. |
| Dropout Voltage | Typ. 0.65 V at 400 mA, allowing operation down to 9.15 V input while maintaining regulation during cold-crank conditions. |
| Quiescent Current | Typ. 120 µA in standby mode, minimizing battery drain during vehicle sleep states. |
| Input Voltage Range | 5.5 V to 45 V, supporting 12 V and 24 V automotive systems including load dump transients. |
| Protection Features | Integrated short-circuit, thermal shutdown, reverse-battery (–16 V), and load dump (60 V) protection per ISO 7637-2. |
Pinout & Package
Supplied in TO220-5-3 package: 5-pin through-hole outline with exposed tab for thermal dissipation and mechanical mounting. Pin 1 = Input, Pin 2 = Ground, Pin 3 = Output, Pin 4 = Sense (not connected in standard configuration), Pin 5 = Enable (active-high, internally pulled down).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (IN) | Main power input | Accepts unregulated 5.5–45 V supply; connects directly to battery rail via fuse and EMI filter. |
| Pin 2 (GND) | Power ground reference | Low-impedance return path shared with sense and enable; must be routed to main chassis ground point. |
| Pin 3 (OUT) | Regulated output | Delivers stable 8.5 V to downstream logic; requires local 10 µF ceramic + 100 µF electrolytic output capacitance. |
| Pin 4 (SENSE) | Remote output sensing | Optional Kelvin connection to load to compensate for PCB trace resistance; left open for standard use. |
| Pin 5 (EN) | Enable control input | Active-high logic input; pull high ≥2.0 V to activate regulator; tied low or floating disables output. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualified | Rated for –40 °C to +125 °C ambient, validated for under-hood automotive deployment without derating. |
| Load dump protection (60 V) | Withstands ISO 7637-2 Pulse 5a without external TVS, reducing BOM count and board space. |
| Reverse-battery tolerance (–16 V) | Survives incorrect battery connection without damage or latch-up, eliminating need for series diode. |
| Adjustable enable threshold | EN pin threshold configurable via external resistor divider to match system wake-up logic levels. |
Applications
| Engine Control Unit (ECU) Power Supply | Body Control Module (BCM) Core Rail |
|---|---|
Use Scenario: Powers MCU, CAN transceiver, and analog front-end in gasoline/diesel engine management systems. IC Role / Device Role / Timing Role: Primary 8.5 V LDO supplying critical safety-related subsystems with fail-safe regulation. Use Value: Maintains output during cranking (down to 6.0 V battery) and load dump events, ensuring uninterrupted ECU operation. | Use Scenario: Supplies central domain controller in door modules, lighting, and HVAC actuators. IC Role / Device Role / Timing Role: Centralized low-noise 8.5 V rail generator with integrated diagnostics for fault reporting. Use Value: Enables single-rail architecture with built-in short-circuit detection, reducing wiring harness complexity. |
| Transmission Control Unit (TCU) | Advanced Driver Assistance Systems (ADAS) Camera Power |
Use Scenario: Provides regulated bias for solenoid drivers and position sensors in automatic transmission systems. IC Role / Device Role / Timing Role: High-reliability 8.5 V source with thermal foldback to prevent overheating during prolonged gear-shift cycles. Use Value: Eliminates need for external current-sense circuitry by integrating accurate foldback limiting. | Use Scenario: Powers image sensor and ISP in rear-view or surround-view camera modules. IC Role / Device Role / Timing Role: Low-noise, low-ripple LDO with fast transient response to support pixel clock stability. Use Value: Delivers <10 mVpp output ripple at 100 kHz, preventing visible noise bands in captured video. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLE4276G V85 | Green version (lead-free, RoHS-compliant); identical electrical specs and pinout. | No functional difference; required for EU/China environmental compliance programs. | Select when RoHS/ELV/REACH documentation and Pb-free finish are mandatory. |
| TLF4276GV85 | Same die but in PG-TO220-5-3 package with enhanced thermal resistance (RthJA = 45 K/W vs. 50 K/W). | Better thermal performance in compact enclosures; same footprint and soldering profile. | Choose for higher ambient temperatures (>105 °C) or tighter board spacing where heat dissipation is constrained. |
Compared with TLE4276 V85, the TLE4276G V85 adds regulatory compliance without design change, while TLF4276GV85 improves thermal margin in space-constrained automotive modules-both retain full functional and pin compatibility.
Availability
TLE4276 V85 is available at Aetrix Electronics and suitable for engine control units, body control modules, and transmission control units requiring stable component supply with automotive-grade reliability and long-term lifecycle support.
Supply support for TLE4276 V85 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 TLE4276 series belongs to Infineon's automotive linear regulator product line, engineered specifically for robust, fail-safe power delivery in harsh vehicle environments.
FAQ
What is the minimum input voltage required for regulation at full 400 mA load?
The TLE4276 V85 maintains regulation down to 9.15 V input at 400 mA due to its 0.65 V typical dropout voltage. Below this, output drops linearly with input; operation below 5.5 V input is not functional.
Does the SENSE pin require external connection in standard applications?
No - Pin 4 (SENSE) is optional and left unconnected in standard configurations. It is only used for remote sensing in high-current layouts where PCB trace resistance causes significant voltage drop between regulator output and load.
Can the EN pin be driven directly by a 3.3 V microcontroller GPIO?
Yes - the EN pin has a 2.0 V typical threshold and draws <1 µA, making it compatible with 3.3 V CMOS logic. No level-shifting is needed, and internal pull-down ensures safe default-off behavior.
Is external output capacitance mandatory, and what type is recommended?
Yes - a minimum 10 µF ceramic capacitor (X7R, 16 V rating) is required at the output for stability. Adding a 100 µF aluminum or polymer electrolytic in parallel improves transient response and reduces low-frequency ripple.
TLE4276 V85 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- OPTIREG™
- Package/Case:
- TO-220-5 Formed Leads
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 8.5V
- 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:
- Through Hole
- Supplier Device Package:
- PG-TO220-5-3
TLE4276 V85 FAQ
1.How can I place an order for TLE4276 V85 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLE4276 V85 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 TLE4276 V85 reliable?
The price and inventory of TLE4276 V85 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLE4276 V85 is usually 5 days.
3.What payment methods are accepted for TLE4276 V85?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLE4276 V85 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLE4276 V85?
TLE4276 V85 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLE4276 V85 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 TLE4276 V85?
For technical support, including TLE4276 V85 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLE4276 V85 requirements.
6.How does Aetrix verify that TLE4276 V85 is sourced from the original manufacturer or authorized distributors?
All TLE4276 V85 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 TLE4276 V85 meets industry standards.
7.What is the process for return or replacement of TLE4276 V85?
All TLE4276 V85 units undergo pre-shipment inspection (PSI). If there is an issue with TLE4276 V85, 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 TLE4276 V85 part is unused and in its original packaging.
Return procedure for TLE4276 V85:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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