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Infineon Technologies TLE4274D V33
- Part No.:
- TLE4274D V33
- Manufacturer:
- Infineon Technologies
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
TLE4274D V33.pdf
- Description:
- IC REG LINEAR 3.3V 400MA TO252-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,714
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Product details
Overview
TLE4274D V33 from Infineon Technologies is a 3.3 V ±4% fixed-output linear voltage regulator in PG-TO252-3-11 (D-PAK) package, delivering up to 400 mA output current with input voltage range 4.7–40 V. It features short-circuit and reverse-polarity protection, thermal shutdown, and AEC-Q100 qualification for automotive power rail conditioning.
For engineers reviewing the TLE4274D V33 datasheet, TLE4274D V33 pinout, TLE4274D V33 application, or TLE4274D V33 equivalent, key selection criteria include dropout voltage (0.7–1.2 V at 300 mA), quiescent current (8–30 mA across load), junction-to-case thermal resistance (4 K/W), and stability with ≥10 µF/≤2.5 Ω ESR output capacitor.
Technical Context
The TLE4274D V33 uses a bandgap-referenced control amplifier driving a series pass transistor with saturation control to prevent oversaturation under high load. Internal protection circuits actively monitor temperature, current, and polarity to trigger shutdown before damage occurs.
It operates as a monolithic low-dropout regulator with no external feedback network-output voltage is factory-trimmed to 3.3 V. Input-to-output regulation is maintained across -40 °C to +150 °C junction temperature, with line regulation of 10–25 mV over 12–32 V input variation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3 V ±4% (3.17–3.44 V); stable across 5–400 mA load and 4.7–40 V input |
| Max Output Current | 400 mA continuous; internally limited to prevent thermal runaway |
| Dropout Voltage | 0.7–1.2 V at 300 mA; enables operation with minimal headroom above output |
| Quiescent Current | 8–30 mA (load-dependent); critical for low-power automotive sleep-mode design |
| Thermal Resistance | Junction-to-case: 4 K/W (PG-TO252); enables direct heatsink mounting for high ambient |
| PSRR | 60 dB at 100 Hz; suppresses ripple from upstream switching converters |
| Load Regulation | ±40–70 mV (5–300 mA); ensures stable MCU core voltage under dynamic load |
Pinout & Package
Package: PG-TO252-3-11 (D-PAK), thermally enhanced surface-mount package with exposed heatsink pad internally connected to Pin 2 and Pin 4 (GND).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (I) | Input | Connects directly to input supply; requires local 100 nF ceramic decoupling at IC pin |
| 2, 4 (GND) | Ground / Heatsink | Common return path and thermal interface; soldered to PCB copper pour for thermal dissipation |
| 3 (Q) | Output | Regulated 3.3 V output; requires ≥10 µF output capacitor with ≤2.5 Ω ESR for loop stability |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 qualified | Qualified for automotive Grade 1 (-40 °C to +125 °C ambient) per Rev. 2.3 datasheet |
| Reverse polarity protection | Withstands -42 V input without damage; eliminates need for external blocking diode |
| Short-circuit proof operation | Current-limited foldback protects IC and source during sustained output short |
| Thermal shutdown with hysteresis | Activates at ~170 °C junction; restarts after ~20 °C cooldown to prevent cycling |
| Green product (RoHS compliant) | Lead-free and halogen-free per EU Directive 2011/65/EU and JEDEC J-STD-020 |
Applications
| Engine Control Unit (ECU) Power Rail | Automotive Camera Module Supply |
|---|---|
Use Scenario: Providing clean 3.3 V bias to microcontroller, CAN transceiver, and sensor interface circuitry in engine bay environments. IC Role / Device Role / Timing Role: Primary LDO regulator for safety-critical digital subsystems requiring AEC-Q100 compliance and thermal robustness. Use Value: Maintains regulation down to 4.7 V input during cold-crank events while limiting peak current to 400 mA. | Use Scenario: Powering image signal processor (ISP) and MIPI interface in rear-view or surround-view camera modules. IC Role / Device Role / Timing Role: Low-noise post-regulator downstream of buck converter, rejecting switching ripple via 60 dB PSRR. Use Value: Ensures stable 3.3 V under transient loads (e.g., auto-exposure bursts) with <70 mV load regulation error. |
| Body Control Module (BCM) Sensor Interface | Automotive Radar Front-End Bias |
Use Scenario: Supplying 3.3 V to LIN transceivers, door lock actuators, and ambient light sensors in cabin electronics. IC Role / Device Role / Timing Role: Robust point-of-load regulator tolerant to battery reverse connection and load dump transients. Use Value: Survives -42 V reverse polarity and delivers consistent output despite 100–220 µA quiescent current in standby mode. | Use Scenario: Biasing low-noise amplifiers (LNAs) and analog front-end (AFE) components in 77 GHz radar modules. IC Role / Device Role / Timing Role: Precision voltage source with tight 3.3 V tolerance (±4%) and low thermal drift (0.5 mV/K). Use Value: Minimizes gain drift in RF amplifiers across -40 °C to +125 °C operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV73333PDBVR | Lower IQ (50 µA typ), lower max current (300 mA), SOT-23-5 package, no reverse polarity protection | Suitable for ultra-low-power portable systems but not automotive reverse-battery environments | Select only if reverse polarity risk is absent and thermal budget allows higher RθJA |
| NCV8501CDT33RKG | AEC-Q100 Grade 1, same 400 mA rating, TO-252 package, but ±2% output tolerance and higher dropout (1.3 V min) | Better accuracy for precision analog rails; less suitable for low-headroom cold-crank operation | Prefer when tighter output tolerance outweighs dropout penalty in stable battery conditions |
Compared with TLV73333PDBVR and NCV8501CDT33RKG, the TLE4274D V33 uniquely combines reverse polarity survival, automotive qualification, and sub-1.2 V dropout in a thermally optimized D-PAK-making it optimal for harsh-environment engine bay and chassis applications where fault resilience is non-negotiable.
Availability
TLE4274D V33 is available at Aetrix Electronics and suitable for automotive body control modules, engine control units, ADAS camera systems, and radar front-end power supplies requiring stable component supply across extended temperature and lifecycle requirements.
Supply support for TLE4274D V33 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 manufacturing and automotive qualification infrastructure.
The TLE4274 series belongs to Infineon's automotive-grade linear regulator product line, designed specifically for reliable power conditioning in engine, transmission, and ADAS subsystems under ISO 16750 stress conditions.
FAQ
What is the minimum input voltage required for regulation at full 400 mA load?
The TLE4274D V33 requires a minimum input voltage of 4.7 V to maintain 3.3 V output regulation at 400 mA load, per Table 3 Operating Range. This accounts for worst-case dropout (1.2 V) plus output tolerance (3.44 V), ensuring stable operation during automotive cold-crank events.
Can the TLE4274D V33 be used without an output capacitor?
No. The datasheet mandates a minimum 10 µF output capacitor with ESR ≤ 2.5 Ω for closed-loop stability across the full -40 °C to +150 °C temperature range. Omitting it risks oscillation, output overshoot, and potential damage during load transients.
Is thermal derating required when using the PG-TO252-3-11 package on standard FR4?
Yes. With RθJC = 4 K/W and RθJA = 70 K/W (minimal footprint), power dissipation must be limited to avoid exceeding 150 °C junction temperature. At 400 mA and 10 V dropout (4 W), ≥10 cm² copper pour and thermal vias are essential to sustain full load at 85 °C ambient.
Does the TLE4274D V33 support enable or shutdown control?
No. The TLE4274D V33 has no enable pin or logic-controlled shutdown function. It operates continuously when input voltage exceeds 4.7 V. For controlled sequencing, external MOSFET-based pre-regulation or discrete enable circuitry is required.
TLE4274D V33 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- OPTIREG™
- Package/Case:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.2V @ 300mA
- Current - Output:
- 400mA
- Current - Quiescent (Iq):
- 220 µA
- Current - Supply (Max):
- 30 mA
- PSRR:
- 60dB (100Hz)
- Control Features:
- -
- 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-TO252-3-11
TLE4274D V33 FAQ
1.How can I place an order for TLE4274D V33 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLE4274D V33 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 TLE4274D V33 reliable?
The price and inventory of TLE4274D V33 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLE4274D V33 is usually 5 days.
3.What payment methods are accepted for TLE4274D V33?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLE4274D V33 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLE4274D V33?
TLE4274D V33 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLE4274D V33 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 TLE4274D V33?
For technical support, including TLE4274D V33 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLE4274D V33 requirements.
6.How does Aetrix verify that TLE4274D V33 is sourced from the original manufacturer or authorized distributors?
All TLE4274D V33 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 TLE4274D V33 meets industry standards.
7.What is the process for return or replacement of TLE4274D V33?
All TLE4274D V33 units undergo pre-shipment inspection (PSI). If there is an issue with TLE4274D V33, 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 TLE4274D V33 part is unused and in its original packaging.
Return procedure for TLE4274D V33:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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