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Infineon Technologies TLF50211ELXUMA2
- Part No.:
- TLF50211ELXUMA2
- Manufacturer:
- Infineon Technologies
- Package:
- 14-LSSOP (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
TLF50211ELXUMA2.pdf
- Description:
- IC REG BUCK 5V 500MA SSOP-14-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,585
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Product details
Overview
TLF50211ELXUMA2 from Infineon is a 2.2 MHz automotive-grade buck regulator with integrated PMOS switch, delivering 500 mA at 5 V ±2% output voltage from 4.75–45 V input. It features <45 µA quiescent current, PFM mode for light-load efficiency, and 100% duty cycle capability-enabling direct battery-to-5V conversion in engine control units and dashboard systems.
For engineers reviewing the TLF50211ELXUMA2 datasheet, TLF50211ELXUMA2 pinout, TLF50211ELXUMA2 application, or TLF50211ELXUMA2 equivalent, key selection criteria include its AEC-Q100 qualification, 2.2 MHz fixed+sync-capable switching frequency, exposed-pad PG-SSOP-14 thermal performance, and low shutdown current (<2 µA) for always-on automotive subsystems.
Technical Context
The TLF50211ELXUMA2 implements current-mode PWM regulation with internal compensation, enabling fast line transient rejection and stable loop behavior without external compensation components. Its oscillator supports both free-running (via FREQ pin resistor) and external synchronization (SYNC pin), though sync is disabled in PFM mode.
Protection architecture includes cycle-by-cycle current limiting, thermal shutdown, and input undervoltage lockout (UVLO). The soft-start function limits inrush current and prevents output overshoot during startup, while the EN pin enables precise system-level power sequencing with sub-2 µA shutdown current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V ±2% - tightly regulated rail for MCU cores and sensors in automotive ECUs. |
| Max Output Current | 500 mA - sufficient to power multiple low-power automotive subsystems from single IC. |
| Input Voltage Range | 4.75 V to 45 V - covers cold-crank (4.75 V) and load-dump (45 V) transients per ISO 7637-2. |
| Switching Frequency | 2.2 MHz nominal - enables use of ≤4.7 µH inductors and compact 1206/0805 ceramic capacitors. |
| Quiescent Current | <45 µA at nominal battery voltage - extends battery life in always-on modules like body controllers. |
| Shutdown Current | <2 µA - meets ultra-low leakage requirements for vehicle sleep-mode compliance (ISO 19453). |
| Operating Junction Temp | −40°C to +150°C - qualified for under-hood placement per AEC-Q100 Grade 0. |
Pinout & Package
TLF50211ELXUMA2 is housed in a thermally enhanced PG-SSOP-14 package with exposed pad (EP), optimized for high-power-density automotive PCB layouts. The EP must be soldered to a large copper pour connected to GND for effective heat dissipation (RthJA = 47 K/W, 2s2p JEDEC standard).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 6, 8, 12 | N.C. | No internal connection; may be left floating or tied to GND for mechanical stability. |
| 4 | SYNC | Synchronization input - accepts external clock to align switching frequency; inactive in PFM mode. |
| 5 | FREQ | Frequency adjustment - sets nominal frequency via resistor to GND; value must match sync target if used concurrently. |
| 7 | FB | Feedback input - directly connected to output capacitor; also supplies internal bias from regulated output. |
| 9, 10 | GND | Ground terminals - require low-inductance, wide-trace connections to minimize noise and improve thermal conduction. |
| 11 | SWO | Buck switch output - connects to catch diode cathode and inductor; carries high di/dt switching current. |
| 13 | VS | Supply input - accepts full 4.75–45 V automotive rail; includes integrated UVLO circuitry. |
| 14 | EN | Enable input - active-high logic; controls device state with <2 µA shutdown current when pulled low. |
| EP | Exposed Pad | Thermal & electrical ground - must be soldered to GND plane for thermal management and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated PMOS Power Switch | Eliminates external high-side MOSFET and gate driver, reducing BOM count and layout complexity. |
| PFM Mode at Light Load | Extends efficiency to <1 mA load by disabling internal regulators between pulses, critical for standby operation. |
| 100% Duty Cycle Operation | Permits dropout-free 5 V output even at VS = 5.0 V - essential for post-cold-crank recovery. |
| Internal Soft-Start | Gradually ramps reference voltage to limit inrush current and prevent output overshoot during startup. |
| AEC-Q100 Qualified | Validated for automotive Grade 0 (−40°C to +150°C), including HTOL, temperature cycling, and ESD testing. |
Applications
| Engine Control Unit (ECU) | Instrument Cluster Dashboard |
|---|---|
|
Use Scenario: Powers microcontroller, CAN transceiver, and analog sensors in gasoline/diesel engine management systems exposed to harsh thermal and electrical environments. IC Role / Device Role / Timing Role: Primary 5 V supply rail generator with high PSRR and fast transient response to handle injector switching noise. Use Value: Replaces inefficient linear regulators, cutting thermal load by >80% while maintaining AEC-Q100 compliance and cold-crank operation down to 4.75 V. |
Use Scenario: Supplies display controller, backlight LED drivers, and touch interface ICs in digital instrument clusters requiring low EMI and stable 5 V. IC Role / Device Role / Timing Role: High-frequency buck converter minimizing conducted emissions near sensitive RF receivers (e.g., AM/FM tuner). Use Value: 2.2 MHz switching avoids AM band interference; low quiescent current extends battery backup time during ignition-off periods. |
| Brake Control Module | Automotive Infotainment Head Unit |
|
Use Scenario: Provides isolated 5 V rail for ABS/ESC microcontrollers and solenoid drivers in safety-critical braking systems. IC Role / Device Role / Timing Role: Safety-relevant power supply with overtemperature shutdown and cycle-by-cycle current limiting for fault containment. Use Value: Thermal shutdown at 165°C protects against sustained overload; UVLO prevents erratic operation during battery sag below 4.75 V. |
Use Scenario: Delivers clean 5 V to audio DSP, USB PHY, and display interface in head units with always-on connectivity (Bluetooth, Wi-Fi). IC Role / Device Role / Timing Role: Always-on power domain regulator supporting rapid wake-from-sleep with <2 µA shutdown current. Use Value: Enables ISO 19453-compliant sleep current budgets; SYNC pin allows EMI spreading across multiple DC/DC converters in multi-rail systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61480QPWPRQ1 | 3.5 V–36 V input, 800 mA, 2.1 MHz, requires external compensation network | Higher current, wider VIN, but larger solution size due to external compensation and higher IQ (60 µA) | Preferred where >500 mA load or tighter input range (36 V max) suffices and board space permits external RC network |
| TPS62933RTER | 3 V–36 V input, 3 A, 2.25 MHz, integrated LDO post-regulator, 15 µA IQ | Higher current, lower IQ, but not AEC-Q100 qualified; limited to cabin/non-under-hood use | Selected for infotainment or telematics modules needing ultra-low IQ and ripple suppression, not under-hood deployment |
Compared with LM61480QPWPRQ1 and TPS62933RTER, the TLF50211ELXUMA2 uniquely combines AEC-Q100 Grade 0 qualification, 45 V absolute max input, and internal compensation in a compact SSOP package-making it optimal for space-constrained, high-reliability under-hood applications where 500 mA is sufficient.
Availability
TLF50211ELXUMA2 is available at Aetrix Electronics and suitable for engine control units, instrument cluster dashboards, and brake control modules requiring stable component supply across automotive production lifecycles.
Supply support for TLF50211ELXUMA2 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, and industrial control ICs, with global manufacturing and quality certification to IATF 16949.
The TLF50211ELXUMA2 belongs to Infineon's TLF family of automotive DC/DC regulators, designed specifically for high-voltage, high-temperature automotive subsystems requiring robustness, low IQ, and minimal external components.
FAQ
Can TLF50211ELXUMA2 operate with input voltage below 5.0 V?
Yes-it supports input down to 4.75 V and maintains 100% duty cycle operation, allowing continuous 5 V output during cold-crank events. Below 4.75 V, UVLO disables the device to prevent unstable regulation. This behavior is verified per ISO 16750-2 cold-crank test profiles.
Is external compensation required for stable operation?
No-TLF50211ELXUMA2 integrates a complete compensation network optimized for typical 3.3–22 µH inductors and 10–50 µF ceramic output capacitors. No external RC components are needed, simplifying design and improving production yield.
How is thermal performance affected by the exposed pad connection?
The exposed pad must be soldered to a minimum 100 mm² GND copper area using ≥4 thermal vias (0.3 mm diameter) to achieve RthJA = 47 K/W. Without proper pad connection, junction temperature rise increases by >25°C at full load, risking thermal shutdown.
Does SYNC pin functionality work in all operating modes?
No-synchronization is only active in PWM mode. During light-load conditions, the device automatically enters PFM mode, disabling SYNC input and reverting to free-running frequency set by the FREQ pin resistor. This ensures efficiency optimization without compromising timing control during heavy loads.
TLF50211ELXUMA2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 14-LSSOP (0.154", 3.90mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.75V
- Voltage - Input (Max):
- 45V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 500mA
- Frequency - Switching:
- 2.25MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PG-SSOP-14-3
TLF50211ELXUMA2 FAQ
1.How can I place an order for TLF50211ELXUMA2 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLF50211ELXUMA2 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 TLF50211ELXUMA2 reliable?
The price and inventory of TLF50211ELXUMA2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLF50211ELXUMA2 is usually 5 days.
3.What payment methods are accepted for TLF50211ELXUMA2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLF50211ELXUMA2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLF50211ELXUMA2?
TLF50211ELXUMA2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLF50211ELXUMA2 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 TLF50211ELXUMA2?
For technical support, including TLF50211ELXUMA2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLF50211ELXUMA2 requirements.
6.How does Aetrix verify that TLF50211ELXUMA2 is sourced from the original manufacturer or authorized distributors?
All TLF50211ELXUMA2 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 TLF50211ELXUMA2 meets industry standards.
7.What is the process for return or replacement of TLF50211ELXUMA2?
All TLF50211ELXUMA2 units undergo pre-shipment inspection (PSI). If there is an issue with TLF50211ELXUMA2, 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 TLF50211ELXUMA2 part is unused and in its original packaging.
Return procedure for TLF50211ELXUMA2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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