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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > DC DC Switching Controllers

Infineon Technologies TLF51801ELVXUMA1

Name: TLF51801ELVXUMA1
Brand: Infineon Technologies
SKU: TLF51801ELVXUMA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TLF51801ELVXUMA1

Manufacturer:: Infineon Technologies

Category:: DC DC Switching Controllers

Package:: 14-LSSOP (0.154", 3.90mm Width) Exposed Pad

Datasheet:: TLF51801ELVXUMA1.pdf

Description:: IC REG CTRLR BUCK

Quantity:: RFQ Add To RFQ list

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Product details

Overview

TLF51801ELVXUMA1 from Infineon Technologies is a 10 A synchronous step-down DC/DC controller for automotive power systems, operating from 4.75 V to 45 V input, delivering adjustable output voltage with ±2% tolerance, supporting >99% max duty cycle, and featuring external MOSFET drive (UG/LG), integrated bootstrap diode, and AEC-Q100 qualification for under-hood applications.

For engineers reviewing the TLF51801ELVXUMA1 datasheet, TLF51801ELVXUMA1 pinout, TLF51801ELVXUMA1 application, or TLF51801ELVXUMA1 equivalent, key selection criteria include its Rdson/shunt current sensing flexibility, SYNC/FREQ dual-mode frequency control (100–700 kHz), soft-start timing dependency on switching frequency, UVLO and thermal shutdown protection, and PG-SSOP-14 exposed-pad thermal performance.

Technical Context

The TLF51801ELVXUMA1 implements voltage-mode PWM regulation with continuous conduction mode only and no feedforward path; compensation is externally configured via the COMP pin using a network tailored to the output filter and load. Its current limit is configurable either by sensing high-side MOSFET R_DS(on) (sensehigh/senselow) or a shunt resistor (senselow-to-battery).

It supports synchronization to an external clock (350–700 kHz) or resistor-set oscillator (100–700 kHz); the soft-start ramp duration scales inversely with switching frequency (~1 ms at 500 kHz). Overvoltage protection activates when FB exceeds 110% of regulated output, forcing LG on to discharge the output capacitor.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	4.75 V to 45 V - supports wide automotive battery transients including cold-crank and load-dump conditions.
Max Output Current	10 A - achieved using external high- and low-side logic-level MOSFETs driven by UG and LG outputs.
Output Voltage Accuracy	±2% - ensures stable regulation across temperature (-40°C to +150°C junction) and line/load variations.
Switching Frequency Range	100 kHz to 700 kHz - adjustable via resistor (FREQ-mode) or external clock (SYNC-mode) for EMI optimization.
Max Duty Cycle	>99% - enables very low dropout operation, critical for high-V_IN/low-V_OUT automotive rails like 12 V → 3.3 V.
Shutdown Current	<2 µA - minimizes standby power loss in always-on vehicle subsystems such as body control modules.
Junction Temperature Range	-40°C to +150°C - validated for under-hood placement per AEC-Q100 Grade 0 requirements.

Pinout & Package

TLF51801ELVXUMA1 is housed in a thermally enhanced PG-SSOP-14 package with exposed pad, requiring low-inductance connection of the pad to both GND and heatsink for optimal thermal resistance (R_thJC = 10 K/W).

Pin/Terminal	Circuit Role	Design Meaning
IVCC	Internal LDO output	Supplies low-side driver and bootstraps high-side driver; requires local 100 nF decoupling to GND.
EN	Enable input	Active-high logic input with internal pull-down; initiates soft-start and gate drive sequencing.
SYNC/FREQ	Oscillator control	Configurable as sync input (350–700 kHz) or frequency-set node (100–700 kHz via resistor to GND).
COMP	Loop compensation	Connects to external RC network to stabilize voltage-mode control loop against output filter dynamics.
FB	Voltage feedback	Monitors regulated output via resistive divider; triggers overvoltage shutdown if >110% nominal.
UG / LG	MOSFET gate drivers	Logic-level outputs driving external high-side (UG) and low-side (LG) N-channel MOSFETs.
sensehigh / senselow	Current sense inputs	Support two configurations: Rdson sensing (sensehigh to HS-FET source) or shunt sensing (senselow to shunt top).

Key Features

Feature	Design Value
Adjustable current limit	Configurable via external shunt resistor or high-side MOSFET R_DS(on), enabling design flexibility without changing IC.
Integrated bootstrap diode	Eliminates need for external bootstrap diode, reducing BOM count and layout area in high-side gate drive path.
Soft-start with frequency scaling	Ramp time adapts to switching frequency (e.g., ~1 ms at 500 kHz), ensuring consistent startup behavior across designs.
AEC-Q100 qualified	Validated for automotive Grade 0 (T_j = −40°C to +150°C), including HTOL, TC, and ESD testing per JEDEC standards.
Overvoltage protection	Automatic LG activation when FB exceeds 110% of setpoint, clamping output without external circuitry.

Applications

Engine Control Unit (ECU) Power Supply

Advanced Driver Assistance Systems (ADAS) Camera Module

Use Scenario: Regulating 12 V battery to 3.3 V/5 V for microcontroller and sensor rails in engine bay environments.

IC Role / Device Role / Timing Role: Synchronous buck controller managing high-current, high-temperature power conversion with transient robustness.

Use Value: >99% duty cycle enables reliable 12 V → 3.3 V conversion during cold-crank (6.0 V min), while AEC-Q100 qualification ensures long-term reliability.

Use Scenario: Powering image sensor and ISP in front-facing ADAS cameras mounted behind windshield.

IC Role / Device Role / Timing Role: Adjustable-frequency controller minimizing EMI interference with high-speed video data lines.

Use Value: SYNC-mode operation allows alignment of switching edges with system clock domain, reducing spectral noise coupling into analog video paths.

Body Control Module (BCM) Central Power Hub

Electric Power Steering (EPS) Motor Driver Auxiliary Rail

Use Scenario: Generating multiple isolated 5 V/3.3 V rails from 12 V battery for door modules, lighting, and LIN transceivers.

IC Role / Device Role / Timing Role: Multi-rail controller supporting flexible current limiting and soft-start sequencing across sub-systems.

Use Value: Shunt- and Rdson-based current sensing allow tailoring protection thresholds to diverse load profiles without redesigning the controller stage.

Use Scenario: Providing clean, regulated 12 V auxiliary supply for motor gate drivers and position sensors in EPS systems.

IC Role / Device Role / Timing Role: High-efficiency controller with ultra-low shutdown current (<2 µA) preserving battery during vehicle sleep mode.

Use Value: <2 µA quiescent current meets OEM requirements for <100 µA total BCM/EPS sleep current, extending parked battery life.

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous buck controller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
LM5116PWPR	Wider input range (3 V to 75 V), no integrated bootstrap diode, requires external bootstrap diode and higher gate drive voltage.	Used in industrial/high-voltage DC systems; lacks AEC-Q100 qualification and automotive temp range.	Select when input exceeds 45 V or when higher VIN tolerance is required; not suitable for automotive under-hood use.
MPQ4312GR-A	Integrated power stage (2x MOSFETs), fixed 500 kHz f_SW, max 6 A output, no SYNC input, smaller QFN-16 package.	Targeted at space-constrained ADAS camera or infotainment supplies where full 10 A is unnecessary.	Select for compact, lower-current designs where integration reduces layout complexity; not scalable to 10 A loads.

Compared with LM5116PWPR and MPQ4312GR-A, TLF51801ELVXUMA1 uniquely combines AEC-Q100 Grade 0 qualification, >99% duty cycle, dual-mode frequency control, and flexible current sensing-making it the only choice for high-reliability, high-current automotive buck controllers requiring thermal resilience and EMI control.

Availability

TLF51801ELVXUMA1 is available at Aetrix Electronics and suitable for Engine Control Units, ADAS camera modules, Body Control Modules, and Electric Power Steering auxiliary power supplies requiring stable component supply across automotive production lifecycles.

Supply support for TLF51801ELVXUMA1 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 electronics, and industrial control ICs, with global manufacturing and qualification infrastructure.

The TLF51801ELVXUMA1 belongs to Infineon's automotive-grade DC/DC controller product line, designed specifically for high-current, high-temperature power conversion in engine bay and safety-critical vehicle subsystems.

FAQ

What is the purpose of the sensehigh and senselow pins?

The sensehigh and senselow pins configure the current-limiting method: in Rdson mode, sensehigh connects to the high-side MOSFET source and senselow to ground; in shunt mode, senselow connects between the shunt resistor and battery, while sensehigh sets threshold via a resistor to battery. Both methods enable precise, adjustable overcurrent protection without external op-amps.

Does TLF51801ELVXUMA1 support forced continuous conduction mode (FCCM)?

No - the TLF51801ELVXUMA1 operates exclusively in continuous conduction mode (CCM) and does not support discontinuous or forced CCM modes. Its voltage-mode control architecture and lack of valley detection or pulse-skipping logic preclude light-load efficiency optimization techniques like burst mode or FCCM.

Can the TLF51801ELVXUMA1 drive GaN FETs?

Yes - the UG and LG outputs provide logic-level gate drive compatible with enhancement-mode GaN HEMTs requiring 0–5 V gate signals; however, layout must minimize parasitic inductance due to fast GaN switching, and external gate resistors may be needed to damp ringing, as the IC does not include programmable slew-rate control.

Is an external bootstrap capacitor required despite the integrated bootstrap diode?

Yes - the integrated bootstrap diode eliminates only the discrete diode; a ceramic bootstrap capacitor (typically 100 nF) must still be placed between BTS and BUO to supply charge to the high-side driver during each switching cycle, as specified in the layout guidelines of the datasheet.

TLF51801ELVXUMA1 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

Output Type:: Transistor Driver

Function:: Step-Down

Output Configuration:: Positive

Topology:: Buck

Number of Outputs:: 1

Output Phases:: 1

Voltage - Supply (Vcc/Vdd):: 4.75V ~ 45V

Frequency - Switching:: 100kHz ~ 700kHz

Duty Cycle (Max):: -

Synchronous Rectifier:: Yes

Clock Sync:: Yes

Serial Interfaces:: -

Control Features:: Enable, Frequency Control

Operating Temperature:: -40°C ~ 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: PG-SSOP-14-EP

TLF51801ELVXUMA1 FAQ

1.How can I place an order for TLF51801ELVXUMA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for TLF51801ELVXUMA1 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 TLF51801ELVXUMA1 reliable?

The price and inventory of TLF51801ELVXUMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLF51801ELVXUMA1 is usually 5 days.

3.What payment methods are accepted for TLF51801ELVXUMA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLF51801ELVXUMA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TLF51801ELVXUMA1?

TLF51801ELVXUMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TLF51801ELVXUMA1 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 TLF51801ELVXUMA1?

For technical support, including TLF51801ELVXUMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLF51801ELVXUMA1 requirements.

6.How does Aetrix verify that TLF51801ELVXUMA1 is sourced from the original manufacturer or authorized distributors?

All TLF51801ELVXUMA1 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 TLF51801ELVXUMA1 meets industry standards.

7.What is the process for return or replacement of TLF51801ELVXUMA1?

All TLF51801ELVXUMA1 units undergo pre-shipment inspection (PSI). If there is an issue with TLF51801ELVXUMA1, 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 TLF51801ELVXUMA1 part is unused and in its original packaging.

Return procedure for TLF51801ELVXUMA1:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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