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Infineon Technologies TLF50241ELXUMA1
- Part No.:
- TLF50241ELXUMA1
- Manufacturer:
- Infineon Technologies
- Package:
- 14-LSSOP (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
TLF50241ELXUMA1.pdf
- Description:
- IC REG BUCK 5V 500MA PGSSOP14
- Quantity:
- Payment:
- Shipping:
Inventory:4,737
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Product details
Overview
TLF50241ELXUMA1 from Infineon is a 2.2 MHz, 500 mA synchronous step-down DC/DC regulator with integrated PMOS power switch, fixed 5 V output (±2% tolerance), 4.75–45 V input range, and quiescent current <45 µA - designed for automotive body, infotainment, and engine management systems where low standby power and high thermal robustness are critical.
For engineers reviewing the TLF50241ELXUMA1 datasheet, TLF50241ELXUMA1 pinout, TLF50241ELXUMA1 application, or TLF50241ELXUMA1 equivalent, key selection criteria include its AEC-Q100 qualification, PFM/PWM dual-mode operation, reset generator with adjustable threshold, synchronization capability, and PG-SSOP-14 exposed-pad thermal performance under -40°C to +150°C junction temperature.
Technical Context
The TLF50241ELXUMA1 implements current-mode PWM regulation with internal compensation, enabling fast line transient rejection and stable loop behavior without external compensation components. Its 2.2 MHz fixed-frequency operation supports compact LC filter design using 3.3–22 µH inductors and 10–50 µF output capacitors with ESR ≤0.100 Ω.
It integrates a reset generator with externally adjustable threshold via RTADJ, soft-start ramp control to limit inrush current, and cycle-by-cycle overcurrent protection. Thermal shutdown activates at Tj ≥150°C, and undervoltage lockout engages below 4.75 V on VS.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±2% - eliminates need for external feedback resistors and ensures stable MCU/core logic supply in automotive domains. |
| Max Output Current | 500 mA continuous - sufficient to power microcontrollers, CAN transceivers, and sensor interfaces without external boost stages. |
| Input Voltage Range | 4.75 V to 45 V - supports cold-crank (4.75 V) and load-dump (45 V) conditions per ISO 7637-2 in 12 V automotive systems. |
| Quiescent Current | <45 µA at nominal battery voltage - enables always-on functionality in gateway modules and body controllers with minimal battery drain. |
| Switching Frequency | 2.2 MHz nominal - allows use of small, low-profile inductors (≥3.3 µH) and reduces EMI filtering burden in space-constrained ECUs. |
| Operating Junction Temp | -40°C to +150°C - qualified per AEC-Q100 Grade 0, enabling placement near heat sources like powertrain or lighting drivers. |
| Reset Generator | Open-drain RO output with adjustable threshold via RTADJ resistor divider - provides reliable power-on reset for connected MCUs without external supervisor IC. |
Pinout & Package
TLF50241ELXUMA1 is housed in a thermally enhanced PG-SSOP-14 package with exposed pad (EP), optimized for PCB heat dissipation via direct GND connection. The 14-pin layout includes dual GND pins (9, 10), dedicated SWO for buck switch node routing, and functional pins for synchronization (SYNC), frequency adjustment (FREQ), and reset threshold tuning (RTADJ).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 RO | Reset Output | Open-collector signal indicating valid output voltage; requires external pull-up to enable MCU reset assertion during brown-out. |
| 2, 3, 8, 12, 14 N.C. | No Connect | Internally unconnected; may be tied to GND or left floating per layout best practice - no electrical function. |
| 4 SYNC | Synchronization Input | Accepts external clock (≤2.2 MHz) to align switching edges across multiple regulators and reduce system-level EMI peaks. |
| 5 FREQ | Frequency Adjustment | Resistor-to-GND sets nominal switching frequency; required for precise timing control when SYNC is unused. |
| 6 RTADJ | Reset Threshold Adjust | Resistor divider between VS and GND sets reset deassertion voltage (typically 4.65 V); enables custom brown-out detection. |
| 7 FB | Feedback Input | Connects directly to output capacitor; also supplies internal bias - no external resistive divider needed due to fixed 5 V regulation. |
| 9, 10 GND | Ground | Dual low-inductance ground paths - must be routed with wide, short traces to exposed pad for thermal and noise integrity. |
| 11 SWO | Buck Switch Output | Drain of integrated PMOS high-side switch - connects to catch diode cathode and inductor; critical for minimizing switching losses. |
| 13 VS | Supply Voltage Input | Main input rail (4.75–45 V); requires local ceramic decoupling (≥1 µF) close to pin for transient immunity. |
| EP (Exposed Pad) | Thermal & Electrical Ground | Mandatory solder connection to large GND copper area - primary path for heat conduction and EMI suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated PMOS Power Switch | Eliminates need for external high-side MOSFET and gate driver, reducing BOM count and PCB footprint by >30% vs discrete buck solutions. |
| PFM Mode at Light Load | Disables internal control circuitry between pulses to maintain >85% efficiency down to 1 mA load - essential for sleep-mode power budgets. |
| 100% Duty Cycle Operation | Enables dropout operation down to VOUT + VDS(on) ≈ 5.15 V - supports extended operation during battery sag without output collapse. |
| Internal Soft-Start Ramp | Gradually increases duty cycle over ~1 ms to limit inrush current into output capacitance - prevents input voltage droop and relay chatter. |
| AEC-Q100 Qualified | Validated for Grade 0 (-40°C to +150°C Tj) per stress test requirements - meets functional safety readiness for ASIL-B systems. |
Applications
| Dashboard Cluster Power Supply | Engine Control Unit (ECU) Core Rail |
|---|---|
|
Use Scenario: Providing stable 5 V to instrument cluster microcontrollers, TFT LCD bias, and CAN transceivers in harsh under-hood environments. IC Role / Device Role / Timing Role: Primary buck regulator delivering regulated 5 V from vehicle battery; handles cold-crank dips and load-dump surges. Use Value: Low quiescent current extends battery life during ignition-off periods; 150°C rating permits placement near display backlight drivers. |
Use Scenario: Generating 5 V core supply for 32-bit engine control MCUs and sensor signal conditioners in proximity to high-temperature exhaust manifolds. IC Role / Device Role / Timing Role: High-reliability DC/DC converter operating continuously at elevated ambient temperatures with tight output regulation. Use Value: ±2% output tolerance ensures ADC reference stability; integrated reset generator replaces discrete supervisor ICs. |
| Automotive Body Control Module (BCM) | Infotainment System Power Management |
|
Use Scenario: Powering door module microcontrollers, LIN transceivers, and LED drivers in distributed body electronics with variable load profiles. IC Role / Device Role / Timing Role: Always-on buck regulator supporting wake-on-LIN functionality while maintaining sub-50 µA quiescent draw. Use Value: PFM mode sustains >88% efficiency at 100 µA load; SYNC pin enables EMI coexistence with RF modules in shared PCB zones. |
Use Scenario: Supplying 5 V to audio DSPs, touch controller SoCs, and USB PHYs in center-stack head units subject to vibration and thermal cycling. IC Role / Device Role / Timing Role: Compact, thermally robust regulator replacing linear LDOs to reduce heat generation in sealed enclosures. Use Value: 2.2 MHz switching enables 2.0 × 2.5 mm inductors; exposed pad improves thermal resistance to 10 K/W (junction-to-case). |
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, requires external feedback resistors for 5 V setting. | Higher current capacity suits multi-rail systems; lacks integrated reset generator and adjustable reset threshold. | Select when >500 mA load or programmable output voltage is required; adds BOM complexity for fixed 5 V use. |
| TPS62933RTER | 3.0 V to 36 V input, 3 A output, 1.8–2.2 MHz adjustable frequency, 15 µA IQ, no AEC-Q100 qualification. | Superior light-load efficiency but unqualified for automotive; no reset output or sync input. | Prefer for industrial or consumer designs needing ultra-low IQ; not suitable for production automotive ECUs. |
Compared with LMQ66430QRNXTQ1 and TPS62933RTER, the TLF50241ELXUMA1 uniquely combines AEC-Q100 Grade 0 qualification, integrated reset with threshold adjust, and fixed 5 V/500 mA operation in a thermally optimized SSOP package - making it optimal for cost-sensitive, space-constrained automotive subsystems requiring zero-configuration reliability.
Availability
TLF50241ELXUMA1 is available at Aetrix Electronics and suitable for automotive dashboard clusters, engine control units, and body control modules requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for TLF50241ELXUMA1 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 R&D and manufacturing infrastructure.
The TLF50241ELXUMA1 belongs to Infineon's TLF automotive DC/DC regulator family, engineered specifically for robust, low-quiescent-power 5 V conversion in harsh-temperature automotive subsystems.
FAQ
What is the purpose of the RTADJ pin?
The RTADJ pin allows external adjustment of the reset threshold voltage via a resistor divider between VS and GND. When the VS supply drops below the programmed threshold (e.g., 4.65 V), the RO pin asserts a reset signal to connected microcontrollers. If unused, RTADJ must be tied to VS to disable reset functionality.
Can the TLF50241ELXUMA1 operate without an external frequency-setting resistor?
No - the FREQ pin requires an external resistor to GND to set the nominal switching frequency. Leaving FREQ open causes undefined operation. If synchronization is used, the resistor must still be present and sized near the target sync frequency to ensure stable startup and mode transition.
How does the device handle input voltage transients such as load dump?
The TLF50241ELXUMA1 withstands up to 45 V on the VS pin per absolute maximum ratings and incorporates input undervoltage lockout that disables operation below 4.75 V. Its internal PMOS switch and thermal shutdown (150°C) provide protection during sustained overvoltage, though external TVS clamping is recommended per ISO 7637-2 for full compliance.
Is the exposed pad electrically connected internally?
Yes - the exposed pad is internally connected to GND and serves as the primary thermal and electrical ground path. It must be soldered to a large PCB GND copper area using multiple thermal vias to achieve specified RthJA (47 K/W, 2s2p) and ensure reliable operation at full load and high ambient temperature.
TLF50241ELXUMA1 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
TLF50241ELXUMA1 FAQ
1.How can I place an order for TLF50241ELXUMA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLF50241ELXUMA1 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 TLF50241ELXUMA1 reliable?
The price and inventory of TLF50241ELXUMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLF50241ELXUMA1 is usually 5 days.
3.What payment methods are accepted for TLF50241ELXUMA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLF50241ELXUMA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLF50241ELXUMA1?
TLF50241ELXUMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLF50241ELXUMA1 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 TLF50241ELXUMA1?
For technical support, including TLF50241ELXUMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLF50241ELXUMA1 requirements.
6.How does Aetrix verify that TLF50241ELXUMA1 is sourced from the original manufacturer or authorized distributors?
All TLF50241ELXUMA1 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 TLF50241ELXUMA1 meets industry standards.
7.What is the process for return or replacement of TLF50241ELXUMA1?
All TLF50241ELXUMA1 units undergo pre-shipment inspection (PSI). If there is an issue with TLF50241ELXUMA1, 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 TLF50241ELXUMA1 part is unused and in its original packaging.
Return procedure for TLF50241ELXUMA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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