Infineon Technologies IFX1763LDV50XUMA1

Overview

IFX1763LDV50 from Infineon Technologies is a micropower, low-noise, low-dropout 5 V linear regulator in PG-TSON-10 exposed pad package, delivering up to 500 mA output current with 350 mV dropout at full load, ±2.5% output voltage accuracy over temperature and load, and 42 µVRMS output noise (10 Hz–100 kHz) when using a 10 nF BYP capacitor. It serves as a primary power supply for noise-sensitive image sensors and radar front-ends.

For engineers reviewing the IFX1763LDV50 datasheet, IFX1763LDV50 pinout, IFX1763LDV50 application, or IFX1763LDV50 equivalent, key selection criteria include its 5.5–20 V wide input range, 30 µA quiescent current, reverse battery protection, Kelvin sense capability, and stability with ≥3.3 µF ceramic output capacitors without ESR requirements.

Technical Context

The IFX1763LDV50 integrates an error amplifier with Kelvin-sense feedback path, internal bandgap reference, saturation control for low-dropout operation, and thermal shutdown with foldback current limiting. Its architecture supports precise regulation under varying load transients while maintaining ultra-low noise via external bypass capacitor coupling to the reference node.

It features reverse-battery protection that blocks reverse current flow from OUT to IN during polarity reversal, eliminating need for external blocking diodes. The EN pin enables logic-level (5 V or open-collector) control of shutdown mode with <1 µA leakage, and the SENSE pin allows remote sensing to compensate for PCB trace IR drop.

Key Specifications

Pinout & Package

IFX1763LDV50 is housed in a PG-TSON-10 exposed pad package (3.0 × 3.0 × 0.85 mm), where the exposed thermal pad (Pin 11) must be soldered to PCB ground and electrically tied to Pin 6 (GND) for optimal thermal performance 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 MCP1826T-5002E/DB, IFX1763LDV50 uniquely combines Kelvin sensing, dedicated noise-reduction BYP pin, reverse-battery protection, and TSON-10 thermal efficiency - making it optimal for high-reliability, noise-critical industrial and automotive-adjacent systems where board space and thermal management are constrained.

Availability

IFX1763LDV50 is available at Aetrix Electronics and suitable for image sensor power supply, radar front-end biasing, and microcontroller core supply requiring stable component supply, long-term lifecycle support, and RoHS-compliant green packaging.

Supply support for IFX1763LDV50 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 industrial control solutions, with global manufacturing and quality certification to ISO/TS 16949 and IATF 16949 standards.

The IFX1763 product line delivers high-precision, low-noise LDOs for mission-critical analog and mixed-signal subsystems in transportation-adjacent, industrial, and medical instrumentation - emphasizing robustness, thermal efficiency, and noise immunity over cost-optimized consumer-grade regulation.

FAQ

What is the minimum output capacitance required for IFX1763LDV50 stability?

The IFX1763LDV50 requires a minimum 3.3 µF ceramic output capacitor for unconditional stability across all operating conditions. This value applies to X5R/X7R dielectrics with typical ESR <10 mΩ. Larger values improve transient response but are not needed for basic loop stability. Aluminum or tantalum capacitors may also be used if their ESR falls within 10–100 mΩ range.

Can the SENSE pin be left unconnected if Kelvin sensing is not used?

Yes - when Kelvin sensing is not required, the SENSE pin (Pin 4) must be connected directly to the OUT pin (Pins 1 or 2) on the PCB, not left floating. This configuration configures the regulator for standard local-sense operation and ensures accurate regulation at the device output. Floating the SENSE pin risks instability or incorrect regulation due to noise coupling.

Does IFX1763LDV50 require an input capacitor, and what value is recommended?

An input capacitor is required if the device is located more than 6 inches from the main filter capacitor or if significant trace inductance exists. For battery-powered applications, a 1–10 µF ceramic capacitor placed close to the IN pin (Pins 9 or 10) is recommended. This mitigates high-frequency noise and stabilizes input impedance, especially important during load transients or cold-crank events.

How does reverse battery protection function in IFX1763LDV50?

IFX1763LDV50 incorporates internal reverse-battery protection that blocks current flow from OUT to IN when VIN is reversed (e.g., −20 V). During such fault, the device behaves like a series diode with ~0.7 V forward drop, preventing reverse current into the load and avoiding damage to downstream circuitry. No external components are needed, and the protection operates without latch-up or degradation across repeated fault events.