Infineon Technologies IFX1763XEJVXUMA1

Overview

IFX1763XEJVXUMA1 from Infineon Technologies is a micropower, low-noise, 500 mA low-dropout linear regulator with fixed 3.3 V output, 320 mV dropout voltage at full load, 24 µVRMS output noise (10 Hz–100 kHz), and 30 µA quiescent current. It operates across 1.8 V to 20 V input, delivers ±2.5% output accuracy over temperature and load, and integrates reverse-battery protection and thermal/overcurrent shutdown. Used in radar front-ends and image sensor power rails where low noise and stable bias are critical.

For engineers reviewing the IFX1763XEJVXUMA1 datasheet, IFX1763XEJVXUMA1 pinout, IFX1763XEJVXUMA1 application, or IFX1763XEJVXUMA1 equivalent, key selection criteria include its 3.3 V fixed output, DSO-8 exposed pad thermal performance, EN-controlled shutdown (<1 µA), Kelvin sense capability for remote load regulation, and compatibility with ≥3.3 µF ceramic output capacitors without ESR requirements.

Technical Context

The IFX1763XEJVXUMA1 implements a PMOS pass transistor architecture enabling true reverse-battery protection and zero reverse current flow. Its error amplifier uses a 1.22 V internal reference and supports Kelvin sensing via the SENSE pin-critical for maintaining 3.3 V regulation under PCB trace IR drops in high-precision analog subsystems.

Low-noise operation relies on external 0.01 µF BYP-to-OUT capacitor bypassing the internal reference, reducing integrated RMS noise to 24 µVRMS. The EN pin accepts 5 V logic or open-collector drive with internal 1 µA pull-up current requirement, and the device remains stable with aluminum, tantalum, or ceramic output capacitors ≥3.3 µF.

Key Specifications

Pinout & Package

IFX1763XEJVXUMA1 is packaged in PG-DSO-8 Exposed Pad (RoHS-compliant, thermal pad soldered to PCB ground). Pin 9 (exposed pad) must be tied to GND and electrically connected to Pin 6 (GND) for optimal thermal dissipation and EMI suppression.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-noise LDO applications.

Compared with TLE42754G and LP5907MFX-3.3/NOPB, IFX1763XEJVXUMA1 uniquely balances 500 mA drive, 24 µVRMS noise, Kelvin sense, and reverse-battery protection-making it the only choice for industrial radar and high-fidelity image sensor power where all four attributes are simultaneously required.

Availability

IFX1763XEJVXUMA1 is available at Aetrix Electronics and suitable for radar front-end power, CMOS image sensor bias, microcontroller core supply, and battery-powered instrumentation requiring stable component supply across extended temperature and lifecycle windows.

Supply support for IFX1763XEJVXUMA1 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 quality certification to ISO/TS 16949 and IATF 16949 standards.

The IFX1763 belongs to Infineon's wide-input, low-noise LDO product line designed specifically for high-reliability industrial and radar applications-emphasizing thermal robustness, reverse-polarity resilience, and sub-30 µVRMS noise performance without external compensation.

FAQ

What is the minimum output capacitance required for stability?

The IFX1763XEJVXUMA1 requires a minimum 3.3 µF ceramic, tantalum, or aluminum output capacitor for unconditional stability across all operating conditions. Larger values improve transient response but are not necessary for basic regulation. The capacitor must be placed as close as possible to the OUT and GND pins, with low-inductance layout to prevent oscillation.

Can the SENSE pin be left unconnected in standard configurations?

Yes-the SENSE pin can be directly connected to the OUT pin in standard PCB layouts where trace resistance between the regulator and load is negligible (<10 mΩ). Leaving it unconnected is not permitted; it must either be shorted to OUT or routed to the load's power entry point for Kelvin sensing. Floating the SENSE pin risks regulation instability and output inaccuracy.

Does IFX1763XEJVXUMA1 require an input capacitor?

An input capacitor is recommended when the device is located more than 15 cm from the main input filter or when high-impedance sources (e.g., long battery leads) are used. A 1–10 µF ceramic capacitor placed near the IN pin suppresses high-frequency noise and prevents oscillation due to source inductance-especially critical in battery-powered radar modules.

Is the exposed thermal pad electrically connected internally?

No-the exposed pad (Pin 9) is not electrically connected to any internal circuitry. It serves solely as a thermal conduction path and must be soldered to a PCB ground plane and tied to Pin 6 (GND) externally to ensure mechanical stability, thermal performance, and EMI reduction. Failure to do so degrades thermal resistance by >30 °C/W and increases radiated emissions.