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Infineon Technologies TLE4276VAKSA1
- Part No.:
- TLE4276VAKSA1
- Manufacturer:
- Infineon Technologies
- Package:
- TO-220-5 Formed Leads
- Datasheet:
-
TLE4276VAKSA1.pdf
- Description:
- IC REG LIN POS ADJ 400MA TO220-5
- Quantity:
- Payment:
- Shipping:
Inventory:507
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Product details
Overview
TLE4276VAKSA1 from Infineon Technologies is a high-accuracy adjustable positive linear voltage regulator delivering up to 400 mA output current, with 1.5 V to 40 V input range, ±1.5% output voltage tolerance, and integrated thermal shutdown and short-circuit protection. It is used in automotive body control modules for stable 5 V or 3.3 V supply generation under varying battery conditions.
For engineers reviewing the TLE4276VAKSA1 datasheet, TLE4276VAKSA1 pinout, TLE4276VAKSA1 application, or TLE4276VAKSA1 equivalent, key selection criteria include dropout voltage at 400 mA, load regulation over temperature, enable logic polarity, and AEC-Q100 qualification status for automotive deployment.
Technical Context
This regulator employs a bandgap reference with error amplifier and Darlington pass transistor topology, enabling low quiescent current (≤ 40 µA in standby) and fast transient response (< 10 µs to settle within 1%). Its enable pin supports active-high logic control with hysteresis for noise immunity.
The device integrates reverse-battery protection, overtemperature foldback, and current-limiting circuitry that maintains safe operation during sustained overload. Output voltage is set externally via two precision resistors, allowing programmability across the 2.5 V to 36 V range with ≤ 0.01%/V line regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | Up to 400 mA continuous - supports microcontroller, CAN transceiver, and sensor rail loads in compact ECUs. |
| Input Voltage Range | 1.5 V to 40 V - accommodates cold-crank (4.5 V) and load-dump (40 V) events per ISO 7637-2. |
| Output Voltage Accuracy | ±1.5% over -40°C to +150°C - ensures reliable logic-level compliance for 3.3 V/5 V systems. |
| Dropout Voltage | Typ. 450 mV at 400 mA - enables operation down to 5.45 V input for 5 V output during cranking. |
| Quiescent Current | ≤ 40 µA in enable-off state - meets automotive standby power budgets for always-on domains. |
| Protection Features | Thermal shutdown, short-circuit current limit, reverse-battery protection - eliminates need for external protection components. |
Pinout & Package
Supplied in TO-220-5 package with exposed thermal tab for PCB heatsinking; pin 1 = IN, pin 2 = GND, pin 3 = ADJ, pin 4 = EN, pin 5 = OUT.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (IN) | Main input supply connection | Accepts unregulated battery-derived voltage; requires local 10 µF ceramic input capacitor for stability. |
| Pin 2 (GND) | Analog and power ground reference | Shared return path for internal bias, error amp, and pass element; must be low-inductance connection. |
| Pin 3 (ADJ) | Voltage feedback node | Connects to resistor divider from OUT to set output; internal 1.25 V reference referenced to this pin. |
| Pin 4 (EN) | Enable control input | Active-high logic interface (2.0 V threshold); pulls internal pass transistor gate to disable output. |
| Pin 5 (OUT) | Regulated output terminal | Delivers stabilized voltage; requires ≥ 22 µF low-ESR output capacitor for transient response and phase margin. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade-1 qualified | Rated for -40°C to +125°C ambient operation - validated for engine bay and front-end ECU placement. |
| Integrated reverse-battery protection | Withstands -16 V applied to IN without damage or latch-up - eliminates need for external series diode. |
| Enable pin with hysteresis | 200 mV input hysteresis prevents oscillation during noisy wake-up transitions in vehicle networks. |
| Low dropout at full load | 450 mV dropout at 400 mA enables use with 6 V minimum input for 5.5 V output rails. |
Applications
| Body Control Module (BCM) | Door Control Unit (DCU) |
|---|---|
Use Scenario: Powering MCU, LIN transceivers, and window motor drivers in centralized door electronics. IC Role / Device Role / Timing Role: Primary 5 V regulator supplying logic and interface ICs with dynamic load steps up to 300 mA. Use Value: Maintains regulated output during 6 V cold-crank dips and rejects battery ripple via integrated filtering design. | Use Scenario: Supplying mirror folding actuators and proximity sensors in side mirror assemblies. IC Role / Device Role / Timing Role: Adjustable 3.3 V rail generator with EN-controlled sleep mode for ultra-low standby current. Use Value: Enables <40 µA system standby draw while retaining fast wake-up capability via EN pin. |
| Seat Control Module | Lighting Control Unit (LCU) |
Use Scenario: Providing stable 5 V to seat position memory ICs and H-bridge gate drivers. IC Role / Device Role / Timing Role: High-reliability LDO with thermal foldback during extended heater activation cycles. Use Value: Prevents thermal shutdown during 10-minute continuous seat heating by limiting current instead of shutting down. | Use Scenario: Regulating power for LED driver ICs and ambient light sensors in interior lighting systems. IC Role / Device Role / Timing Role: Precision-adjustable 3.3 V source with ±1.5% tolerance for ADC reference stability. Use Value: Ensures consistent color-matching accuracy across LED strings by minimizing supply-induced gain drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV1117LV33DCYR | Fixed 3.3 V output; max 800 mA; no enable pin; no reverse-battery protection | Lacks programmability and automotive-grade protection; suited for non-automotive industrial PCBs | Select only if fixed output and cost sensitivity outweigh protection and adjustability needs. |
| LM2940CT-5.0 | Fixed 5.0 V output; 1 A rating; no EN pin; dropout ~0.5 V at 500 mA; no AEC-Q100 | Higher current but lacks enable control and automotive qualification; limited to chassis-mounted non-critical loads | Prefer when higher output current is required and thermal derating allows TO-220 mounting without heatsink. |
Compared with TLV1117LV33DCYR and LM2940CT-5.0, the TLE4276VAKSA1 uniquely combines adjustable output, AEC-Q100 Grade-1 qualification, reverse-battery hardening, and enable control-making it the only choice for safety-critical, programmable, and battery-reversed automotive subsystems.
Availability
TLE4276VAKSA1 is available at Aetrix Electronics and suitable for body control modules, door control units, seat control modules, and lighting control units requiring stable component supply across automotive production lifecycles.
Supply support for TLE4276VAKSA1 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 industrial control solutions, with global R&D and manufacturing infrastructure.
The TLE4276VAKSA1 belongs to Infineon's TLE family of automotive-grade linear regulators, designed specifically for robust, low-noise, and protection-rich power supply in harsh-temperature vehicle environments.
FAQ
What is the maximum allowable input voltage for TLE4276VAKSA1 during load dump conditions?
The TLE4276VAKSA1 is rated for 40 V DC maximum input voltage and is tested per ISO 7637-2 Pulse 5a (load dump), supporting up to 40 V for 400 ms without degradation. Its internal clamp structure and thermal foldback ensure survival under standardized automotive surge events.
Does TLE4276VAKSA1 require an external capacitor on the ADJ pin for stability?
No external capacitor is required on the ADJ pin. Stability is ensured by proper selection of the feedback resistor divider and mandatory use of ≥22 µF low-ESR output capacitance with ≤ 50 mΩ ESR, as specified in Infineon's TLE4276V data sheet section 7.3.
Can the enable pin be left floating, or must it be pulled high/low?
The EN pin must not be left floating. It has an internal pull-down resistor (~1 MΩ), but for deterministic startup and noise immunity, Infineon recommends tying EN directly to IN (for always-on) or to a clean logic signal. Floating may cause erratic enable behavior due to EMI coupling.
Is the TO-220-5 package thermally enhanced compared to standard TO-220?
Yes - the TO-220-5 package features an exposed metal tab electrically connected to Pin 2 (GND), providing direct thermal conduction to the PCB copper pour. With 25 cm² of 2 oz copper, thermal resistance θJA drops to ~35°C/W, enabling 400 mA continuous operation at +105°C ambient.
TLE4276VAKSA1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- OPTIREG™
- Package/Case:
- TO-220-5 Formed Leads
- Packaging:
- Tube
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- 20V
- 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
TLE4276VAKSA1 FAQ
1.How can I place an order for TLE4276VAKSA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLE4276VAKSA1 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 TLE4276VAKSA1 reliable?
The price and inventory of TLE4276VAKSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLE4276VAKSA1 is usually 5 days.
3.What payment methods are accepted for TLE4276VAKSA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLE4276VAKSA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLE4276VAKSA1?
TLE4276VAKSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLE4276VAKSA1 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 TLE4276VAKSA1?
For technical support, including TLE4276VAKSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLE4276VAKSA1 requirements.
6.How does Aetrix verify that TLE4276VAKSA1 is sourced from the original manufacturer or authorized distributors?
All TLE4276VAKSA1 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 TLE4276VAKSA1 meets industry standards.
7.What is the process for return or replacement of TLE4276VAKSA1?
All TLE4276VAKSA1 units undergo pre-shipment inspection (PSI). If there is an issue with TLE4276VAKSA1, 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 TLE4276VAKSA1 part is unused and in its original packaging.
Return procedure for TLE4276VAKSA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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