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Infineon Technologies TLF50211ELXUMA1
- Part No.:
- TLF50211ELXUMA1
- Manufacturer:
- Infineon Technologies
- Package:
- 14-LSSOP (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
TLF50211ELXUMA1.pdf
- Description:
- IC REG BUCK 5V 500MA PGSSOP14
- Quantity:
- Payment:
- Shipping:
Inventory:4,619
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Product details
Overview
TLF50211ELXUMA1 from Infineon is a 2.2 MHz automotive-grade step-down DC/DC regulator with integrated PMOS power switch, delivering 500 mA at 5 V ±2% output voltage, <45 µA quiescent current, and operation across 4.75–45 V input range-designed for engine management and infotainment power rails.
For engineers reviewing the TLF50211ELXUMA1 datasheet, TLF50211ELXUMA1 pinout, TLF50211ELXUMA1 application, or TLF50211ELXUMA1 equivalent, key selection criteria include its AEC-Q100 qualification, PFM/PWM dual-mode efficiency optimization, 100% duty cycle capability, synchronization input (SYNC), and thermal shutdown with -40°C to 150°C junction temperature rating.
Technical Context
The TLF50211ELXUMA1 implements current-mode PWM regulation with internal compensation, enabling fast line transient rejection and stable loop behavior without external compensation components. Its oscillator supports fixed 2.2 MHz operation or adjustable frequency via external resistor on FREQ pin, and synchronization via SYNC pin-though SYNC is inactive in PFM mode.
It integrates cycle-by-cycle current limiting, overtemperature shutdown, and input undervoltage lockout (UVLO). The EN pin enables low-power shutdown (<2 µA), while soft-start limits inrush current and prevents output overshoot during startup.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 500 mA continuous-supports mid-power automotive subsystems without external boost stages. |
| Output Voltage | 5.0 V ±2%-tight tolerance enables direct replacement of LDOs in 5 V logic and MCU supply rails. |
| 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. |
| Quiescent Current | <45 µA at nominal battery voltage-enables always-on functionality in body electronics with minimal battery drain. |
| Switching Frequency | 2.2 MHz nominal-permits use of small 3.3–22 µH inductors and reduces EMI filter size. |
| Shutdown Current | <2 µA-facilitates deep sleep states in ECU power management architectures. |
| Operating Junction Temp | -40°C to +150°C-qualified per AEC-Q100 Grade 0 for under-hood deployment. |
Pinout & Package
TLF50211ELXUMA1 is housed in PG-SSOP-14 package with exposed thermal pad, optimized for automotive PCB layouts requiring high thermal reliability and compact footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1,2,3,6,8,12 | N.C. | Internally unconnected-may be left floating or tied to GND for mechanical stability. |
| 4 | SYNC | Synchronization input-accepts external clock to align switching frequency; disabled in PFM mode. |
| 5 | FREQ | Frequency adjustment-external resistor to GND sets nominal switching frequency; must be sized near sync target if SYNC used. |
| 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 connection to PCB ground plane for noise immunity and thermal conduction. |
| 11 | SWO | Buck switch output-drain of integrated PMOS; connects to catch diode cathode and inductor node. |
| 13 | VS | Supply voltage input-accepts full 4.75–45 V automotive rail; includes internal UVLO circuitry. |
| 14 | EN | Enable input-high-active logic; controls device enable/disable with sub-2 µA shutdown current. |
| Exposed Pad | Thermal / GND | Must be soldered to large copper pour tied to GND-critical for thermal dissipation and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated PMOS Power Switch | Eliminates need for external high-side MOSFET and gate driver, reducing BOM count and layout complexity. |
| PFM Mode at Light Load | Extends battery runtime by disabling internal control circuitry between pulses-reducing idle power loss. |
| 100% Duty Cycle Operation | Enables dropout-free regulation down to VS = VOUT (e.g., 5 V out at 5.1 V in), critical for cold-crank survival. |
| Internal Soft-Start | Gradually ramps reference voltage to limit inrush current and prevent output overshoot during power-up. |
| AEC-Q100 Qualified | Validated for automotive Grade 0 (Tj = −40°C to +150°C), including HTOL, TC, and ESD testing per JEDEC standards. |
Applications
| Dashboard Instrument Cluster | Engine Control Unit (ECU) |
|---|---|
|
Use Scenario: Powering microcontroller, CAN transceiver, and display drivers in digital dashboards subject to frequent ignition cycling and vibration. IC Role / Device Role / Timing Role: Primary 5 V buck regulator supplying core logic and interface ICs from 12 V battery rail. Use Value: Low quiescent current extends battery life during vehicle-off state; 2.2 MHz switching avoids AM radio band interference. |
Use Scenario: Providing stable 5 V supply to engine sensors, knock detection circuitry, and flash memory in under-hood ECUs. IC Role / Device Role / Timing Role: High-reliability DC/DC converter operating continuously across extreme ambient temperatures and load transients. Use Value: AEC-Q100 qualification and 150°C junction rating ensure functional safety compliance; UVLO prevents erratic behavior during cranking. |
| Braking System ABS Module | Infotainment Head Unit |
|
Use Scenario: Delivering clean 5 V power to ABS controller MCU and wheel speed sensor interfaces in safety-critical braking systems. IC Role / Device Role / Timing Role: Safety-relevant power stage with overtemperature shutdown and cycle-by-cycle current limiting. Use Value: Integrated protection features reduce need for external fault monitoring; 100% duty cycle maintains regulation during low-battery cranking. |
Use Scenario: Supplying 5 V to audio DSP, touchscreen controller, and USB PHY in center-stack head units with always-on connectivity. IC Role / Device Role / Timing Role: Efficient intermediate regulator stepping down from 12 V battery to 5 V bus shared across multiple peripherals. Use Value: PFM mode minimizes standby power draw during Bluetooth/Wi-Fi sleep; SYNC pin allows EMI spreading across multiple converters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMQ66430QRNXTQ1 | 3.0 V to 36 V input, 3 A output, 2.1 MHz, integrated FETs but higher IQ (26 µA typical) | Higher output current and wider VIN support; not rated for 150°C junction temp | Preferred for higher-current modules where thermal margin exceeds 135°C; requires revalidation of loop stability. |
| TPS62933RTER | 3.0 V to 18 V input, 3 A, 1.8 MHz, 15 µA IQ, but no AEC-Q100 qualification | Lacks automotive qualification and extended temperature support; smaller package (12-pin QFN) | Suitable for non-safety infotainment accessories only; not recommended for under-hood or ASIL-B systems. |
Compared with LMQ66430QRNXTQ1 and TPS62933RTER, TLF50211ELXUMA1 uniquely combines AEC-Q100 Grade 0 rating, 45 V max input, and sub-45 µA quiescent current-making it optimal for cost-sensitive, thermally constrained 500 mA automotive rails where qualification and cranking robustness are mandatory.
Availability
TLF50211ELXUMA1 is available at Aetrix Electronics and suitable for dashboard instrument clusters, engine control units, and braking system ABS modules requiring stable component supply across automotive production lifecycles.
Supply support for TLF50211ELXUMA1 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.
TLF50211ELXUMA1 belongs to Infineon's TLF family of automotive DC/DC regulators-designed specifically for harsh-environment power conversion in engine, chassis, and body control modules.
FAQ
What is the maximum allowable input voltage transient for TLF50211ELXUMA1?
The absolute maximum input voltage is 45 V per datasheet Table 1 (P_4.1.9), validated for ISO 7637-2 Pulse 5a load-dump events. Sustained operation above 45 V risks permanent damage; external TVS clamping is recommended for systems exceeding this rating during fault conditions.
Can TLF50211ELXUMA1 operate without an external feedback resistor divider?
No-TLF50211ELXUMA1 is a fixed 5 V output device with internal feedback network; the FB pin connects directly to the output capacitor and serves as the internal reference point. No external resistive divider is required or supported.
Is the exposed thermal pad electrically connected internally?
Yes-the exposed pad is internally connected to GND and must be soldered to a PCB copper pour tied to the main ground plane. This connection provides both thermal conduction (RthJC = 10 K/W) and electrical grounding for noise suppression.
Does TLF50211ELXUMA1 support forced PWM mode, or is PFM automatic?
TLF50211ELXUMA1 operates automatically in PFM mode below ~50 mA load and transitions to PWM above that threshold. There is no user-controllable mode select pin or register-mode switching is fully internal and transparent to the system designer.
TLF50211ELXUMA1 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:
- Obsolete
- 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-EP
TLF50211ELXUMA1 FAQ
1.How can I place an order for TLF50211ELXUMA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLF50211ELXUMA1 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 TLF50211ELXUMA1 reliable?
The price and inventory of TLF50211ELXUMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLF50211ELXUMA1 is usually 5 days.
3.What payment methods are accepted for TLF50211ELXUMA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLF50211ELXUMA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLF50211ELXUMA1?
TLF50211ELXUMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLF50211ELXUMA1 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 TLF50211ELXUMA1?
For technical support, including TLF50211ELXUMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLF50211ELXUMA1 requirements.
6.How does Aetrix verify that TLF50211ELXUMA1 is sourced from the original manufacturer or authorized distributors?
All TLF50211ELXUMA1 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 TLF50211ELXUMA1 meets industry standards.
7.What is the process for return or replacement of TLF50211ELXUMA1?
All TLF50211ELXUMA1 units undergo pre-shipment inspection (PSI). If there is an issue with TLF50211ELXUMA1, 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 TLF50211ELXUMA1 part is unused and in its original packaging.
Return procedure for TLF50211ELXUMA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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