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Infineon Technologies TLF80511TCATMA2
- Part No.:
- TLF80511TCATMA2
- Manufacturer:
- Infineon Technologies
- Package:
- TO-263-4, D2PAK (3 Leads + Tab), TO-263AA
- Datasheet:
-
TLF80511TCATMA2.pdf
- Description:
- IC REG LINEAR 5V 400MA TO263-3-1
- Quantity:
- Payment:
- Shipping:
Inventory:1,629
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Product details
Overview
TLF80511TCATMA2 from Infineon Technologies is a low-dropout linear voltage regulator delivering a fixed 5 V output with ±2% precision, supporting up to 400 mA load current, ultra-low 38 µA quiescent current, and 100 mV dropout at 100 mA - designed for always-on automotive battery-supplied systems such as body control modules and sensor interfaces.
For engineers reviewing the TLF80511TCATMA2 datasheet, TLF80511TCATMA2 pinout, TLF80511TCATMA2 application, or TLF80511TCATMA2 equivalent, key selection criteria include extended 3.3 V input start-up capability, 1 µF minimum output capacitance requirement, AEC-Q100 qualification, thermal shutdown behavior, and PG-TO263-3 package thermal performance under automotive ambient conditions.
Technical Context
The TLF80511TCATMA2 implements a bandgap-referenced feedback loop controlling a PNP pass transistor to regulate output voltage. Its fast regulation architecture enables stable operation with only 1 µF output capacitance and supports input voltages down to 3.3 V while maintaining regulation until dropout (VI = VQ + Vdr).
Integrated protection includes foldback current limiting that reduces output voltage during overcurrent events and thermal shutdown that disables the pass transistor above 150°C junction temperature - both critical for automotive fault resilience. The device operates across –40°C to +150°C ambient, with thermal resistance RthJA as low as 33 K/W when mounted on a 600 mm² PCB heatsink area.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5 V ±2% - ensures compatible logic-level supply for MCU peripherals and sensors in automotive domains. |
| Max Output Current | 400 mA - sufficient to power multiple CAN transceivers, LIN nodes, or small microcontrollers without external boosting. |
| Quiescent Current | 38 µA typical - enables >1-year battery standby life in always-on vehicle modules with <100 µA system sleep budget. |
| Dropout Voltage | 100 mV at 100 mA - allows regulation from 5.1 V input, extending usable battery range into deep discharge states. |
| Input Voltage Range | 3.3 V to 40 V - covers cold-crank (≥3.3 V), normal operation (9–16 V), and load-dump transients (≤40 V) per ISO 7637-2. |
| Operating Temperature | –40°C to +150°C junction - qualified for under-hood placement including engine control units and transmission controllers. |
| Output Capacitor | 1 µF ceramic, ESR ≤5 Ω - eliminates need for bulk electrolytic capacitors, reducing board space and improving long-term reliability. |
Pinout & Package
TLF80511TCATMA2 uses the PG-TO263-3 (D2PAK) thermally enhanced package with exposed heat slug (Tab) connected to GND. The package enables high-power dissipation in compact automotive layouts and requires PCB copper pour for heatsinking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (I) | Input | Accepts unregulated DC input (3.3–40 V); requires local 100 nF decoupling capacitor to ground for line noise rejection. |
| 2 (GND) | Ground Reference | Primary signal and power return path; must be low-impedance connection to PCB ground plane. |
| 3 (Q) | Regulated Output | Delivers stable 5 V; connects to 1 µF output capacitor with ESR ≤5 Ω for loop stability and transient response. |
| Tab | Thermal Pad / GND | Exposed metal slug for thermal conduction; must be soldered to ≥300 mm² GND copper area for RthJA ≤39 K/W. |
Key Features
| Feature | Design Value |
|---|---|
| Extended Low-Voltage Operation | Starts regulation at 3.3 V input - enables functionality during cold-crank and battery recovery after engine stop-start cycles. |
| Ultra-Low Quiescent Current | 38 µA typical - minimizes parasitic drain on 12 V lead-acid batteries, supporting >10-year shelf life in parked vehicles. |
| Single-Capacitor Stability | Stable with 1 µF ceramic output capacitor - removes dependency on large electrolytics, reducing BOM count and failure modes. |
| Integrated Fault Protection | Current limiting + thermal shutdown - prevents catastrophic failure during short-circuit or overheating, enabling safe "fit-and-forget" deployment. |
| AEC-Q100 Qualified | Grade 0 (–40°C to +150°C) - validated for permanent installation in safety-critical automotive subsystems including ADAS domain controllers. |
Applications
| Body Control Module (BCM) | Engine Control Unit (ECU) Sensor Supply |
|---|---|
Use Scenario: Powering door lock actuators, interior lighting drivers, and LIN transceivers in low-power sleep mode. IC Role / Device Role / Timing Role: Primary 5 V LDO supplying MCU I/O, CAN/LIN PHYs, and discrete driver ICs. Use Value: 38 µA IQ enables BCM to remain active during vehicle sleep without exceeding 100 µA total system budget. |
Use Scenario: Providing regulated 5 V to oxygen sensors, knock sensors, and crankshaft position sensors near hot engine blocks. IC Role / Device Role / Timing Role: Local post-regulator for analog front-end circuitry requiring clean, stable bias independent of main 5 V rail noise. Use Value: 150°C junction rating and 33 K/W thermal resistance allow direct mounting on ECU PCB adjacent to high-temp components. |
| Advanced Driver Assistance Systems (ADAS) Camera Module | Electric Power Steering (EPS) Control Board |
Use Scenario: Powering image signal processor (ISP) I/O banks and CMOS image sensor analog rails in rear-view camera assemblies. IC Role / Device Role / Timing Role: Secondary LDO isolating sensitive imaging circuitry from noisy 12 V supply and digital switching noise. Use Value: 100 mV dropout preserves headroom during 12 V battery sag, ensuring uninterrupted video capture during engine cranking. |
Use Scenario: Supplying 5 V to motor position encoder interfaces and torque sensor signal conditioners in EPS control units. IC Role / Device Role / Timing Role: Fault-tolerant regulator with current limiting and thermal shutdown protecting against motor stall-induced overloads. Use Value: Foldback current limiting prevents thermal runaway during sustained overcurrent, enabling safe fail-operational behavior per ISO 26262 ASIL-B. |
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 |
|---|---|---|---|
| TLF80510TCATMA2 | Same package and pinout; outputs 3.3 V instead of 5 V; identical quiescent current and thermal specs. | Suitable where 3.3 V logic supply is required instead of 5 V - e.g., modern low-voltage MCUs or FPGAs. | Select when system architecture mandates 3.3 V core voltage and all other requirements (AEC-Q100, 400 mA, 38 µA IQ) remain unchanged. |
| NCP1117ST50T3G | SO-8 package; 800 mA output; 6 mA quiescent current; no AEC-Q100 qualification; 1.2 V dropout at 800 mA. | Limited to non-automotive industrial or consumer use due to lack of automotive qualification and higher IQ. | Consider only for cost-sensitive non-automotive designs where 400 mA is insufficient and thermal constraints are less severe. |
Compared with TLF80511TCATMA2, the TLF80510TCATMA2 offers identical automotive robustness at 3.3 V, while the NCP1117ST50T3G trades qualification and ultra-low IQ for higher current and lower cost - making it unsuitable for battery-backed automotive modules but viable for mains-powered industrial controls.
Availability
TLF80511TCATMA2 is available at Aetrix Electronics and suitable for automotive body electronics, engine management systems, ADAS camera modules, and electric power steering control boards requiring stable component supply with full AEC-Q100 traceability and long-lifecycle support.
Supply support for TLF80511TCATMA2 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.
The OPTIREG™ linear family delivers highly integrated, AEC-Q100-qualified voltage regulators optimized for harsh automotive environments - emphasizing ultra-low IQ, wide input range, and robust thermal/overcurrent protection for always-on and safety-critical systems.
FAQ
What is the minimum input voltage required for regulation?
The TLF80511TCATMA2 begins regulating at 3.3 V input - below this, output drops to zero. This extended low-voltage capability supports cold-crank operation in 12 V automotive systems where battery voltage can dip to 3.5 V during engine start. Regulation remains stable up to 40 V, covering load-dump transients defined in ISO 7637-2.
Can the device operate without an input capacitor?
An input capacitor is not required for stability but is strongly recommended: a 100 nF ceramic capacitor placed close to the I pin suppresses high-frequency line noise and improves transient response during load steps. Without it, conducted EMI susceptibility increases and startup behavior may become erratic under noisy supply conditions.
How does the current limit behave during a short circuit?
Under output short-circuit, the TLF80511TCATMA2 enters foldback current limiting: output current reduces to ~100 mA while output voltage collapses near 0 V. This limits power dissipation and prevents thermal runaway. If the fault persists, junction temperature rises until thermal shutdown activates, disabling the pass transistor until cooldown - then automatic restart occurs.
Is the Tab (heat slug) electrically isolated?
No - the Tab is internally connected to GND and must be soldered to a PCB GND copper pour. It serves dual purposes: thermal conduction (reducing RthJA) and electrical grounding. Isolating the Tab breaks the GND reference path and compromises regulation accuracy, stability, and fault protection integrity.
TLF80511TCATMA2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- TO-263-4, D2PAK (3 Leads + Tab), TO-263AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.5V @ 250mA
- Current - Output:
- 400mA
- Current - Quiescent (Iq):
- 75 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 (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PG-TO263-3-1
TLF80511TCATMA2 FAQ
1.How can I place an order for TLF80511TCATMA2 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLF80511TCATMA2 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 TLF80511TCATMA2 reliable?
The price and inventory of TLF80511TCATMA2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLF80511TCATMA2 is usually 5 days.
3.What payment methods are accepted for TLF80511TCATMA2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLF80511TCATMA2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLF80511TCATMA2?
TLF80511TCATMA2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLF80511TCATMA2 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 TLF80511TCATMA2?
For technical support, including TLF80511TCATMA2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLF80511TCATMA2 requirements.
6.How does Aetrix verify that TLF80511TCATMA2 is sourced from the original manufacturer or authorized distributors?
All TLF80511TCATMA2 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 TLF80511TCATMA2 meets industry standards.
7.What is the process for return or replacement of TLF80511TCATMA2?
All TLF80511TCATMA2 units undergo pre-shipment inspection (PSI). If there is an issue with TLF80511TCATMA2, 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 TLF80511TCATMA2 part is unused and in its original packaging.
Return procedure for TLF80511TCATMA2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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