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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Infineon Technologies IFX30081LDV33XUMA1

Name: IFX30081LDV33XUMA1
Brand: Infineon Technologies
SKU: IFX30081LDV33XUMA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IFX30081LDV33XUMA1

Manufacturer:: Infineon Technologies

Category:: Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Package:: 10-TFDFN Exposed Pad

Datasheet:: IFX30081LDV33XUMA1.pdf

Description:: IC REG LINEAR 3.3V 50MA TSON-10

Quantity:: RFQ Add To RFQ list

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Product details

Overview

IFX30081LDV33 from Infineon Technologies is a fixed-output 3.3 V, 50 mA industrial linear voltage regulator in PG-TSON-10 package, featuring ultra-low 5.5 µA quiescent current, 2.75–42 V input range, and integrated enable control. It delivers stable sensor supply in battery-powered smoke detectors with ±2% output accuracy and 100 mV dropout at full load.

For engineers reviewing the IFX30081LDV33 datasheet, IFX30081LDV33 pinout, IFX30081LDV33 application, or IFX30081LDV33 equivalent, key selection criteria include shutdown current (<1 µA), thermal shutdown behavior, output capacitor stability requirements (≥1 µF, ESR ≤100 Ω), and PG-TSON-10 thermal pad grounding practice.

Technical Context

This regulator implements a bandgap-referenced error amplifier with internal current limiting and thermal shutdown circuitry, enabling robust operation under overcurrent or overtemperature fault conditions. Its low-dropout architecture maintains regulation down to VIN = VOUT + 100 mV at 50 mA, while the enable input features an integrated pull-down resistor for default-off operation.

The device requires only a 1 µF ceramic output capacitor for stability across its full operating temperature range (−40 °C to +125 °C) and input voltage span. Input line compensation is supported via a recommended 100 nF ceramic capacitor placed close to the IN pin.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 3.3 V ±2% - ensures compatible logic-level supply for MCU peripherals and analog sensors without external feedback.
Quiescent Current	Typ. 5.5 µA - enables multi-year battery life in always-on smoke detectors with intermittent wake-up cycles.
Dropout Voltage	Typ. 100 mV @ 50 mA - allows regulation from 3.4 V input, critical for single-cell LiFePO₄ or two-cell alkaline systems.
Input Voltage Range	2.75 V to 42 V - supports wide-range industrial power rails including 24 V DC systems with transient surges.
Shutdown Current	<1 µA - reduces standby power to negligible levels when EN is low, preserving battery charge during system sleep.
Thermal Shutdown	Active at T_j ≥150 °C - protects against sustained overload or poor PCB heatsinking in enclosed enclosures.
Output Capacitor	Min. 1 µF ceramic, ESR ≤100 Ω @ 10 kHz - defines minimum stability margin; no electrolytic or tantalum required.

Pinout & Package

PG-TSON-10 package with exposed thermal pad (must be soldered to GND plane for thermal performance and electrical reference). Pin 1 is IN; Pin 3 is EN (active-high, internal pull-down); Pin 5 is GND; Pin 9 is OUT. Pins 2, 4, 6–8, and 10 are NC. Exposed pad connects to GND.

Pin/Terminal	Circuit Role	Design Meaning
1 (IN)	Input Supply	Accepts 2.75–42 V; requires local 100 nF ceramic decoupling to suppress high-frequency noise and line transients.
3 (EN)	Enable Control	Active-high logic input; internal pull-down ensures safe power-down on startup or microcontroller reset.
5 (GND)	Ground Reference	Primary return path; must be connected to low-impedance ground plane, shared with exposed pad.
9 (OUT)	Regulated Output	Delivers 3.3 V ±2%; requires ≥1 µF ceramic capacitor placed within 3 mm of pin for loop stability.
Exposed Pad	Thermal & Electrical Ground	Must be soldered to ≥200 mm² copper area tied to GND; improves thermal resistance by ~30 °C/W and reduces noise coupling.

Key Features

Feature	Design Value
Ultra-low I_Q	5.5 µA typ. - extends shelf life and operational runtime in energy-constrained IoT endpoints.
Wide V_IN range	2.75–42 V - eliminates need for pre-regulation in 12/24 V industrial bus applications.
Integrated EN logic	Internal pull-down resistor - removes external BOM cost and layout complexity for default-off sequencing.
Current limit protection	Internally set - prevents damage during output short-circuit without requiring external foldback circuitry.
RoHS-compliant green product	Lead-free, halogen-free PG-TSON-10 - meets EU Directive 2011/65/EU and IPC-1752A reporting requirements.

Applications

Smoke & Fire Detectors

Industrial Sensor Nodes

Use Scenario: Standby power for electrochemical CO sensors and piezoelectric smoke chamber biasing in UL-certified residential alarms.

IC Role / Device Role / Timing Role: Primary 3.3 V supply for analog front-end and low-power MCU during 10-year battery life cycle.

Use Value: 5.5 µA quiescent current enables >10 years of operation on CR123A primary cells; EN pin allows synchronized wake-up with RF transmission bursts.

Use Scenario: Powering 4–20 mA loop-powered pressure transmitters with HART modulation capability in oil & gas field instrumentation.

IC Role / Device Role / Timing Role: Local 3.3 V rail for ADC, digital isolator, and HART modem ICs isolated from 24 V loop supply.

Use Value: 42 V max input withstands 36 V surge tests per IEC 61000-4-5; 100 mV dropout preserves headroom for precision reference generation.

Wireless Sensor Beacons

Rail-to-Rail Industrial PLC Modules

Use Scenario: Energy-harvesting node using thermoelectric generator (TEG) output fluctuating between 3–12 V to power BLE SoC and MEMS accelerometer.

IC Role / Device Role / Timing Role: Primary LDO for ultra-low-power subsystem; EN controlled by energy buffer monitor to prevent brownout.

Use Value: 2.75 V min input enables start-up from weak TEG sources; <1 µA shutdown current prevents parasitic drain during energy accumulation phase.

Use Scenario: Auxiliary 3.3 V supply for FPGA configuration memory and JTAG interface in modular I/O cards operating from 24 V backplane.

IC Role / Device Role / Timing Role: Decoupled local regulator for noise-sensitive digital logic, independent of main 5 V/3.3 V switching supply.

Use Value: PG-TSON-10 thermal pad enables 1.5 W dissipation at 60 °C ambient; ±2% accuracy ensures reliable FPGA boot and SRAM retention.

Equivalent & Alternatives

The following parts are listed as comparable options for similar linear regulator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLE42744G	Higher I_Q (15 µA), same 3.3 V output, automotive-qualified AEC-Q100 Grade 1	Designed for engine bay environments; includes reverse-battery protection not present in IFX30081LDV33	Select if automotive qualification or reverse-polarity tolerance is mandatory; otherwise higher quiescent current reduces battery life.
MCP1703T-3302E/MB	Lower max V_IN (16 V), 2.5 µA I_Q, SOT-23-5 package	Limited to low-voltage battery systems; lacks thermal shutdown and current limit protection	Choose for ultra-low-power sub-12 V applications where protection features are handled externally; not suitable for 24 V industrial use.

Compared with TLE42744G and MCP1703T-3302E/MB, the IFX30081LDV33 uniquely balances ultra-low quiescent current, 42 V input tolerance, and full internal protection-making it optimal for long-life industrial sensor nodes where automotive qualification is unnecessary but wide-input robustness is essential.

Availability

IFX30081LDV33 is available at Aetrix Electronics and suitable for battery-operated systems, industrial sensor supplies, and smoke/fire detector designs requiring stable component supply with guaranteed long-term manufacturability.

Supply support for IFX30081LDV33 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, certified to ISO 9001 and IATF 16949 quality standards.

The IFX30081LDV33 belongs to Infineon's industrial-grade linear regulator family, designed specifically for ultra-low-power, wide-input-voltage applications in safety-critical and maintenance-free equipment.

FAQ

What is the minimum input voltage required for regulation at full 50 mA load?

The IFX30081LDV33 maintains regulation down to VIN = VOUT + V_DO, or 3.3 V + 0.1 V = 3.4 V at 50 mA. Below 3.4 V, output voltage drops linearly with input. The 2.75 V minimum in the functional range applies only when output current is reduced to maintain V_OUT ≥ 3.3 V × 0.98.

Can the exposed thermal pad be left unconnected?

No. The exposed pad must be soldered to a GND-connected copper area of ≥200 mm². Leaving it unconnected degrades thermal resistance by >50 °C/W and risks junction overheating above 100 °C at 50 mA load, potentially triggering thermal shutdown or reducing reliability.

Is an input capacitor mandatory, and what value is recommended?

Yes, a 100 nF ceramic capacitor is recommended between IN and GND, placed within 3 mm of the IC pins. It suppresses high-frequency noise and line transients that could destabilize regulation or couple into sensitive analog circuits downstream.

Does the IFX30081LDV33 support adjustable output voltage?

No. It is a fixed 3.3 V output device with internal feedback network. There is no provision for external resistor divider adjustment. For adjustable variants, consider Infineon's IFX30082 series, which offers external feedback pins and similar quiescent current performance.

IFX30081LDV33XUMA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: 10-TFDFN Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Output Configuration:: Positive

Output Type:: Fixed

Number of Regulators:: 1

Voltage - Input (Max):: 42V

Voltage - Output (Min/Fixed):: 3.3V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.3V @ 50mA

Current - Output:: 50mA

Current - Quiescent (Iq):: 1 µA

Current - Supply (Max):: 12.5 µA

PSRR:: 57dB (100Hz)

Control Features:: Enable

Protection Features:: Over Current, Over Temperature

Operating Temperature:: -40°C ~ 125°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: PG-TSON-10

IFX30081LDV33XUMA1 FAQ

1.How can I place an order for IFX30081LDV33XUMA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for IFX30081LDV33XUMA1 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 IFX30081LDV33XUMA1 reliable?

The price and inventory of IFX30081LDV33XUMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IFX30081LDV33XUMA1 is usually 5 days.

3.What payment methods are accepted for IFX30081LDV33XUMA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IFX30081LDV33XUMA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IFX30081LDV33XUMA1?

IFX30081LDV33XUMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IFX30081LDV33XUMA1 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 IFX30081LDV33XUMA1?

For technical support, including IFX30081LDV33XUMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IFX30081LDV33XUMA1 requirements.

6.How does Aetrix verify that IFX30081LDV33XUMA1 is sourced from the original manufacturer or authorized distributors?

All IFX30081LDV33XUMA1 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 IFX30081LDV33XUMA1 meets industry standards.

7.What is the process for return or replacement of IFX30081LDV33XUMA1?

All IFX30081LDV33XUMA1 units undergo pre-shipment inspection (PSI). If there is an issue with IFX30081LDV33XUMA1, 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 IFX30081LDV33XUMA1 part is unused and in its original packaging.

Return procedure for IFX30081LDV33XUMA1:

1.Submit a request within 90 days.

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

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