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Infineon Technologies TLE4274GS V33 LG
- Part No.:
- TLE4274GS V33 LG
- Manufacturer:
- Infineon Technologies
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
TLE4274GS V33 LG.pdf
- Description:
- IC REG LIN 3.3V 400MA SOT223-4
- Quantity:
- Payment:
- Shipping:
Inventory:3,218
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Product details
Overview
TLE4274GS V33 LG from Infineon Technologies is a 3.3 V ±4% fixed-output linear voltage regulator in PG-SOT223-4 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 rails.
For engineers reviewing the TLE4274GS V33 LG datasheet, TLE4274GS V33 LG pinout, TLE4274GS V33 LG application, or TLE4274GS V33 LG equivalent, this page provides verified pin functions, thermal resistance (RthJA = 100 K/W), dropout voltage (0.7–1.2 V at 300 mA), PSRR (60 dB @ 100 Hz), and load regulation (40–70 mV) - all critical for low-noise, high-reliability 12 V/24 V automotive subsystems.
Technical Context
The TLE4274GS V33 LG uses a bandgap reference and control amplifier to regulate output by driving a series pass transistor, with saturation control preventing oversaturation under varying load. Internal protection includes thermal shutdown, reverse-polarity blocking, and current limiting.
It operates across -40 °C to +150 °C junction temperature, supports stable regulation with CQ ≥ 10 µF (ESR ≤ 2.5 Ω), and requires CI ≥ 100 nF at the input for line transient suppression and stability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3 V ±4% (3.17–3.44 V); ensures stable MCU/Sensor supply under battery voltage fluctuations |
| Max Output Current | 400 mA continuous; sufficient for powering multiple automotive sensors or CAN transceivers |
| Input Voltage Range | 4.7–40 V; compatible with 12 V and 24 V vehicle electrical systems including cold-crank and load-dump conditions |
| Dropout Voltage | 0.7–1.2 V at 300 mA; enables regulation down to ~4.0 V input, supporting deep battery discharge scenarios |
| PSRR | 60 dB @ 100 Hz; suppresses alternator ripple and switching noise in engine control units |
| Quiescent Current | 8–30 µA to 30 mA depending on load; ultra-low Iq at light load extends standby battery life |
| Thermal Resistance | RthJA = 100 K/W (SOT223, 1 cm² copper); defines max power dissipation (0.4 W) before thermal shutdown |
Pinout & Package
Package: PG-SOT223-4 (lead-free, RoHS-compliant, AEC-Q100 qualified). Exposed pad (Pin 4) is internally connected to GND and serves as thermal path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (I) | Input | Connect directly to input rail via 100 nF ceramic capacitor; minimizes high-frequency impedance for stability |
| 2 & 4 (GND) | Ground / Thermal Pad | Pins 2 and 4 are internally tied to GND; Pin 4 is exposed thermal pad soldered to PCB copper for heat dissipation |
| 3 (Q) | Output | Regulated 3.3 V output; requires ≥10 µF output capacitor (ESR ≤ 2.5 Ω) for loop stability across -40 to +150 °C |
Key Features
| Feature | Design Value |
|---|---|
| Short-circuit proof operation | Internally limits output current to ~600 mA during fault; prevents latch-up and enables automatic recovery |
| Reverse polarity protection | Blocks conduction if input is reversed (down to -42 V); eliminates need for external series diode |
| AEC-Q100 qualified | Validated for Grade 1 (-40 to +125 °C ambient) and extended junction range (-40 to +150 °C) |
| Green Product (RoHS) | Lead-free SOT223 package with halogen-free molding compound; compliant with automotive environmental standards |
| Low quiescent current | As low as 8 µA at 1 mA load; reduces parasitic drain in always-on vehicle modules (e.g., alarm, telematics) |
Applications
| Engine Control Unit (ECU) Power Rail | Automotive Camera Module Supply |
|---|---|
Use Scenario: Powers microcontroller, CAN interface, and analog front-end in gasoline/diesel ECU under wide input voltage (6–16 V) and temperature (-40 to +125 °C). IC Role / Device Role / Timing Role: Primary 3.3 V LDO regulator providing clean, protected supply for safety-critical logic and communication peripherals. Use Value: Dropout voltage ≤1.2 V ensures regulation during cranking (≥6 V input); thermal shutdown prevents failure during prolonged overloads. | Use Scenario: Supplies image sensor, ISP, and MIPI transmitter in ADAS forward-facing camera operating in under-hood environment. IC Role / Device Role / Timing Role: Stable 3.3 V bias source with low PSRR to minimize clock jitter and pixel noise induced by power rail ripple. Use Value: 60 dB PSRR at 100 Hz rejects alternator noise; AEC-Q100 qualification guarantees reliability over 15-year vehicle lifetime. |
| Body Control Module (BCM) Sensor Hub | Electric Power Steering (EPS) Interface |
Use Scenario: Powers multiple LIN-connected sensors (door lock, rain sensor, ambient light) in centralized BCM with shared 12 V bus. IC Role / Device Role / Timing Role: Centralized low-dropout regulator distributing regulated 3.3 V to mixed-signal sensor interfaces and ADC references. Use Value: Load regulation ≤70 mV maintains ADC accuracy across 5–400 mA dynamic load; reverse-polarity protection guards against wiring errors. | Use Scenario: Supplies torque sensor signal conditioning and MCU I/O in EPS motor control unit exposed to vibration and thermal cycling. IC Role / Device Role / Timing Role: Fault-tolerant 3.3 V regulator with integrated thermal and short-circuit protection for safety-related subsystems. Use Value: Short-circuit proofing enables safe operation during motor phase fault events; RthJC = 25 K/W allows direct heatsink coupling via Pin 4. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output automotive LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV73333PDBVR | Lower IQ (4 µA typ), lower max current (300 mA), no reverse-polarity protection | Suitable for low-power body electronics but not for high-stress engine bay environments | Select only if reverse polarity risk is eliminated externally and thermal margin permits 300 mA |
| NCP1117ST33T3G | Higher dropout (1.1 V min), no AEC-Q100 qualification, no internal short-circuit foldback | Acceptable for non-safety automotive accessories but not for ASIL-B/C systems | Use only in cost-sensitive, non-critical applications where qualification and protection are secondary |
Compared with TLV73333PDBVR and NCP1117ST33T3G, the TLE4274GS V33 LG uniquely combines AEC-Q100 Grade 1 qualification, reverse-polarity blocking, and short-circuit foldback - making it the only choice for robust, safety-aware 3.3 V regulation in engine, transmission, and ADAS control units.
Availability
TLE4274GS V33 LG is available at Aetrix Electronics and suitable for automotive engine control units, ADAS camera modules, body control modules, and electric power steering systems requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for TLE4274GS V33 LG 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 product line delivers AEC-Q100-qualified linear regulators designed specifically for harsh automotive environments - emphasizing fault tolerance, thermal resilience, and supply stability in 12 V/24 V vehicle networks.
FAQ
What is the maximum allowable input voltage for continuous operation?
The TLE4274GS V33 LG supports continuous operation up to 40 V input, with absolute maximum rating of 45 V. Operation above 40 V risks exceeding thermal limits or triggering protection circuits, especially at high ambient temperatures or without adequate PCB copper area for heat dissipation.
Can this regulator be used without an output capacitor?
No. An output capacitor ≥10 µF with ESR ≤2.5 Ω is mandatory for closed-loop stability across the full operating temperature range (-40 to +150 °C). Omitting it causes oscillation, output overshoot, and potential damage during load transients.
How does the reverse polarity protection function internally?
The device integrates a reverse-biased protection diode between Input (Pin 1) and GND (Pins 2/4). When input voltage is inverted, the diode blocks conduction, limiting reverse current to <1 µA and preventing damage - eliminating need for external series diodes in harness designs.
Is the exposed thermal pad (Pin 4) required to be soldered?
Yes. Pin 4 is the internal thermal pad and is electrically connected to GND. It must be soldered to ≥1 cm² of PCB copper to achieve the specified RthJA = 100 K/W. Leaving it unsoldered increases thermal resistance by >40%, risking premature thermal shutdown at >200 mA load.
TLE4274GS V33 LG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- OPTIREG™
- Package/Case:
- TO-261-4, TO-261AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PG-SOT223-4
TLE4274GS V33 LG FAQ
1.How can I place an order for TLE4274GS V33 LG through Aetrix?
Please submit a Request for Quotation (RFQ) for TLE4274GS V33 LG 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 TLE4274GS V33 LG reliable?
The price and inventory of TLE4274GS V33 LG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLE4274GS V33 LG is usually 5 days.
3.What payment methods are accepted for TLE4274GS V33 LG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLE4274GS V33 LG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLE4274GS V33 LG?
TLE4274GS V33 LG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLE4274GS V33 LG 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 TLE4274GS V33 LG?
For technical support, including TLE4274GS V33 LG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLE4274GS V33 LG requirements.
6.How does Aetrix verify that TLE4274GS V33 LG is sourced from the original manufacturer or authorized distributors?
All TLE4274GS V33 LG 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 TLE4274GS V33 LG meets industry standards.
7.What is the process for return or replacement of TLE4274GS V33 LG?
All TLE4274GS V33 LG units undergo pre-shipment inspection (PSI). If there is an issue with TLE4274GS V33 LG, 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 TLE4274GS V33 LG part is unused and in its original packaging.
Return procedure for TLE4274GS V33 LG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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