Infineon Technologies IFX54211MBV33HTMA1

Overview

IFX54211MBV33HTMA1 from Infineon Technologies is a fixed-output, high-PSRR low-dropout linear voltage regulator delivering 3.3 V at up to 150 mA with ±3 % accuracy, 290 mV typical dropout at full load, 63 dB PSRR at 10 kHz, and 50 µA quiescent current - designed for industrial preregulation and always-on power domains.

For engineers reviewing the IFX54211MBV33HTMA1 datasheet, IFX54211MBV33HTMA1 pinout, IFX54211MBV33HTMA1 application, or IFX54211MBV33HTMA1 equivalent, key selection criteria include its PG-SCT595 package thermal performance, dual-GND pin layout for heatsinking, 1 µF minimum stable output capacitance, and enable-controlled ultra-low shutdown current (0.01 µA).

Technical Context

This monolithic PMOS-based LDO employs an internal bandgap reference and resistive feedback divider to regulate VIN (2.7–18 V) to a precise 3.3 V output. Its control loop maintains stability across temperature (−40 °C to +125 °C) and load (0–150 mA) with minimal external components.

Protection circuitry includes foldback current limiting, short-circuit detection, and thermal shutdown triggered at 150 °C junction temperature - with automatic restart after cooldown. The EN pin provides logic-level on/off control, and both GND pins (2 & 5) are internally tied and thermally critical for PCB heatsink attachment.

Key Specifications

Pinout & Package

IFX54211MBV33HTMA1 is housed in a thermally enhanced PG-SCT595 surface-mount package (5-pin, 2.1 × 1.6 × 0.6 mm), featuring dual GND pins (2 & 5) for low-impedance thermal path to PCB copper pour.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar fixed-output LDO regulator applications.

Compared with XC6206P332MR-G and LD39050PU33R, IFX54211MBV33HTMA1 uniquely balances 150 mA capability, ultra-low I_Q, integrated thermal management via dual-GND pins, and industrial-grade protection - making it optimal for compact, long-life, high-reliability preregulation.

Availability

IFX54211MBV33HTMA1 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart meter auxiliary rails, and always-on microcontroller supplies requiring stable component supply, long-term lifecycle support, and RoHS-compliant green manufacturing.

Supply support for IFX54211MBV33HTMA1 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, and industrial control ICs, with ISO 9001 and IATF 16949 certified quality systems.

The IFX54211MB series belongs to Infineon's industrial-grade linear regulator product line, engineered specifically for harsh-environment applications demanding high reliability, low power consumption, and robust fault protection - not automotive-qualified.

FAQ

What is the minimum output capacitance required for stable operation?

The IFX54211MBV33HTMA1 is stable with a minimum 1 µF ceramic output capacitor having ESR ≤10 Ω at 10 kHz. This specification holds across the full operating temperature range (−40 °C to +125 °C) and enables flexible capacitor selection without requiring high-ESR tantalum types.

How should the dual GND pins (2 and 5) be implemented on the PCB?

Pins 2 and 5 are internally connected and serve as both electrical ground and thermal conduction paths. Both must be soldered to a common PCB copper pour of ≥300 mm² for thermal performance; splitting or isolating either pin degrades R_thJA and risks thermal shutdown under 150 mA load.

Does this regulator support reverse-voltage or reverse-current protection?

No. The IFX54211MBV33HTMA1 does not include reverse-voltage or reverse-current protection. Input polarity must be maintained, and back-driving the OUT pin above IN is prohibited per absolute maximum ratings (V_OUT max = 5.5 V, but reverse bias may damage the PMOS pass element).

Can the EN pin be left unconnected in always-on applications?

Yes. The EN pin has an internal pull-down resistor; leaving it unconnected defaults the device to enabled state. However, for robustness in noisy environments, tie EN directly to IN via a 100 kΩ resistor to prevent false disabling due to floating node coupling.