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Infineon Technologies TLF80511TFV33ATMA1
- Part No.:
- TLF80511TFV33ATMA1
- Manufacturer:
- Infineon Technologies
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
TLF80511TFV33ATMA1.pdf
- Description:
- IC REG LINEAR 3.3V 400MA TO252-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,926
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Product details
Overview
TLF80511TFV33ATMA1 from Infineon is a fixed-output, low-dropout linear voltage regulator delivering 3.3 V ±2% at up to 400 mA, with 38 µA quiescent current and 100 mV dropout at 100 mA - designed for automotive battery-connected systems requiring stable 3.3 V supply under extended input range (3.3–40 V).
For engineers reviewing the TLF80511TFV33ATMA1 datasheet, TLF80511TFV33ATMA1 pinout, TLF80511TFV33ATMA1 application, or TLF80511TFV33ATMA1 equivalent, key selection criteria include ultra-low IQ for always-on circuits, AEC-Q100 qualification, thermal shutdown behavior, and minimal 1 µF output capacitor requirement for stability.
Technical Context
The device implements a bandgap-referenced feedback loop controlling an internal pass transistor, with integrated current limiting and thermal shutdown circuitry that disables the output during overtemperature events (>150°C) and auto-restarts upon cooling. Its fast regulation architecture enables stable operation with only 1 µF output capacitance and ≤5 Ω ESR.
It operates across an extended input range starting at 3.3 V - enabling regulation even when input falls below nominal output plus dropout - and supports reverse polarity protection via external diode. Junction-to-case thermal resistance is 4 K/W, with RthJA ranging from 39 K/W (600 mm² heatsink) to 95 K/W (minimal footprint).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3 V ±2% - ensures reliable logic-level compatibility with 3.3 V microcontrollers and sensors in automotive ECUs. |
| Max Output Current | 400 mA - sufficient to power multiple CAN transceivers, MCU cores, and peripheral ICs in compact body control modules. |
| Quiescent Current | 38 µA - enables multi-year battery standby life in always-on automotive applications like telematics or alarm systems. |
| Dropout Voltage | 100 mV @ 100 mA - allows regulation down to 3.4 V input, critical for cold-crank scenarios where battery dips to ~6 V. |
| Input Voltage Range | 3.3 V to 40 V - covers full automotive battery range including load dump (40 V transient) and start-stop low-voltage operation. |
| Operating Temperature | -40°C to +150°C - qualified per AEC-Q100 Grade 0, supporting under-hood placement without derating. |
| Output Capacitor | 1 µF ceramic - eliminates need for large tantalum or electrolytic capacitors, reducing board space and cost. |
Pinout & Package
TLF80511TFV33ATMA1 is housed in PG-TO252-3 (DPAK) package with exposed thermal pad (Tab), requiring PCB copper area connection for heatsinking and GND reference.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (I) | Input | Accepts 3.3–40 V supply; requires local decoupling capacitor to suppress line transients and noise. |
| 2 (GND) | Ground Reference | Primary signal and power return path; must be low-impedance and tied to Tab for thermal and electrical integrity. |
| 3 (Q) | Regulated Output | Delivers stable 3.3 V; connects to 1 µF output capacitor placed adjacent to pin for loop stability. |
| Tab | Thermal Pad / GND | Exposed metal slug for heat dissipation; must be soldered to ≥300 mm² PCB copper area and electrically connected to GND. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ | 38 µA enables >10-year battery life in always-on automotive modules without wake-up leakage penalties. |
| Extended VIN start | Regulation begins at 3.3 V input - supports operation during deep battery discharge and cold-crank recovery phases. |
| Single-capacitor stability | Stable with 1 µF ceramic output cap (≤5 Ω ESR) - reduces BOM count, footprint, and cost vs. legacy LDOs needing 10–22 µF. |
| Integrated protection | Current limiting and thermal shutdown prevent destruction during short-circuit or overload, with auto-recovery after cooldown. |
| AEC-Q100 qualified | Grade 0 (−40°C to +150°C) qualification confirms reliability for under-hood automotive use without additional screening. |
Applications
| Body Control Module (BCM) | Advanced Driver Assistance Systems (ADAS) Camera ECU |
|---|---|
|
Use Scenario: Powering microcontroller, CAN transceiver, and sensor interface in vehicle door module with permanent battery connection. IC Role / Device Role / Timing Role: Primary 3.3 V LDO supplying core logic and communication peripherals. Use Value: 38 µA IQ prevents parasitic drain; 100 mV dropout maintains regulation during 6 V cold-crank; AEC-Q100 ensures field reliability. |
Use Scenario: Providing clean 3.3 V rail to image sensor and ISP in front-facing ADAS camera mounted behind windshield. IC Role / Device Role / Timing Role: Post-regulator for noise-sensitive imaging chain, downstream of DC/DC converter. Use Value: Low ESR capacitor compatibility minimizes high-frequency ripple; 150°C rating accommodates sealed housing thermal buildup. |
| Telematics Control Unit (TCU) | Electric Power Steering (EPS) Sensor Interface |
|
Use Scenario: Always-on 3.3 V supply for GNSS receiver, cellular modem, and secure boot controller in fleet tracking unit. IC Role / Device Role / Timing Role: Standby LDO maintaining real-time clock and wake-up logic during vehicle sleep mode. Use Value: Ultra-low IQ extends battery backup duration; extended VIN range tolerates 12 V system fluctuations during ignition cycles. |
Use Scenario: Powering torque and position sensor signal conditioning circuitry in EPS motor control assembly. IC Role / Device Role / Timing Role: Precision analog supply for ADC reference and op-amp biasing in safety-critical sensing path. Use Value: ±2% output accuracy ensures consistent sensor gain calibration; thermal shutdown prevents fault propagation during motor stall events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLF80511TFV50ATMA1 | Same package and architecture, but 5 V output; no change in IQ, dropout, or thermal specs. | Used where 5 V logic or legacy peripherals require regulated supply instead of 3.3 V. | Select when system architecture mandates 5 V rail; not interchangeable without schematic revision. |
| NCP1117ST33T3G | Higher IQ (6 mA), higher dropout (1.1 V @ 800 mA), wider temp range (−40°C to +125°C), not AEC-Q100 qualified. | Suitable for industrial or consumer applications lacking automotive qualification requirements. | Choose only for non-automotive designs where qualification and ultra-low IQ are not required. |
Compared with TLF80511TFV33ATMA1, the V50 variant offers identical performance at 5 V but requires layout changes, while NCP1117ST33T3G lacks automotive qualification and consumes 150× more quiescent current - making it unsuitable for battery-critical or safety-compliant systems.
Availability
TLF80511TFV33ATMA1 is available at Aetrix Electronics and suitable for automotive body electronics, ADAS camera modules, telematics units, and electric power steering systems requiring stable component supply with AEC-Q100 assurance and long-term lifecycle support.
Supply support for TLF80511TFV33ATMA1 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 manufacturing and automotive qualification infrastructure.
TLF80511TF belongs to Infineon's OPTIREG™ Linear family - engineered specifically for automotive power supply resilience, featuring ultra-low IQ, extended input range, and robust protection for battery-connected ECUs.
FAQ
Is TLF80511TFV33ATMA1 pin-compatible with other TO252-3 LDOs?
No - while the PG-TO252-3 package has standard pin spacing, the pin functions (I-GND-Q-Tab) and internal protection behavior differ significantly from generic TO252 LDOs. Substitution requires verification of input/output sequencing, thermal pad connection, and current-limit threshold alignment.
Can TLF80511TFV33ATMA1 operate without an input capacitor?
Yes - the datasheet states an input capacitor is not required for stability, though a local 100 nF ceramic capacitor is recommended near the I pin to suppress high-frequency line noise and transient spikes from automotive power networks.
What is the minimum PCB copper area needed for the Tab thermal pad?
Infineon specifies 300 mm² minimum for RthJA = 52 K/W; using 600 mm² reduces thermal resistance to 39 K/W. The Tab must be soldered to solid GND copper with ≥4 thermal vias (0.3 mm diameter) connecting to inner GND planes for optimal heat transfer.
Does TLF80511TFV33ATMA1 support reverse polarity protection internally?
No - the device lacks internal reverse polarity protection. An external Schottky diode (e.g., 40 V, 1 A) must be placed in series with the input to prevent damage during battery misconnection, as specified in Section 5.4 of the datasheet.
TLF80511TFV33ATMA1 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:
- Last Time Buy
- 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):
- 0.65V @ 250mA
- Current - Output:
- 400mA
- Current - Quiescent (Iq):
- 46 µA
- Current - Supply (Max):
- 80 µA
- PSRR:
- 55dB (100Hz)
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PG-TO252-3
TLF80511TFV33ATMA1 FAQ
1.How can I place an order for TLF80511TFV33ATMA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLF80511TFV33ATMA1 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 TLF80511TFV33ATMA1 reliable?
The price and inventory of TLF80511TFV33ATMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLF80511TFV33ATMA1 is usually 5 days.
3.What payment methods are accepted for TLF80511TFV33ATMA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLF80511TFV33ATMA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLF80511TFV33ATMA1?
TLF80511TFV33ATMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLF80511TFV33ATMA1 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 TLF80511TFV33ATMA1?
For technical support, including TLF80511TFV33ATMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLF80511TFV33ATMA1 requirements.
6.How does Aetrix verify that TLF80511TFV33ATMA1 is sourced from the original manufacturer or authorized distributors?
All TLF80511TFV33ATMA1 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 TLF80511TFV33ATMA1 meets industry standards.
7.What is the process for return or replacement of TLF80511TFV33ATMA1?
All TLF80511TFV33ATMA1 units undergo pre-shipment inspection (PSI). If there is an issue with TLF80511TFV33ATMA1, 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 TLF80511TFV33ATMA1 part is unused and in its original packaging.
Return procedure for TLF80511TFV33ATMA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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