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Infineon Technologies IFX1117MEV33
- Part No.:
- IFX1117MEV33
- Manufacturer:
- Infineon Technologies
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
IFX1117MEV33.pdf
- Description:
- IFX1117 - LINEAR VOLTAGE REGULAT
- Quantity:
- Payment:
- Shipping:
Inventory:2,132
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Product details
Overview
IFX1117MEV33 from Infineon is a fixed-output 3.3 V, 1.0 A low-dropout linear voltage regulator in PG-SOT223 package, featuring ±2% output accuracy, 1.1–1.4 V dropout at 1.0 A, short-circuit and overtemperature protection, and operation up to 125 °C junction temperature - deployed in industrial power rails for microcontrollers and sensors.
For engineers reviewing the IFX1117MEV33 datasheet, IFX1117MEV33 pinout, IFX1117MEV33 application, or IFX1117MEV33 equivalent, key selection criteria include dropout voltage at full load, thermal resistance (RthJA = 164 K/W bare footprint), stability with ≥10 µF/ESR ≤20 Ω output capacitor, and input voltage range (4.7–15 V) for 3.3 V regulation.
Technical Context
The IFX1117MEV33 is a monolithic NPN-based LDO regulator with internal reference (1.25 V), error amplifier, and pass transistor. It delivers regulated 3.3 V output without external feedback components, relying on internal trimming for ±2% tolerance across 0–125 °C.
Protection circuitry includes foldback current limiting (1100–2250 mA trip), thermal shutdown at ~150 °C junction, and safe operating area enforcement. Input-to-output differential must remain ≥1.1 V under 1.0 A load to maintain regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3 V ±2% - ensures stable supply for 3.3 V logic, ADC references, and low-voltage microcontrollers. |
| Max Output Current | 1.0 A continuous - supports moderate-power digital loads without external boost stages. |
| Dropout Voltage | 1.30–1.40 V @ 1.0 A - enables operation from 4.7 V input while maintaining 3.3 V output. |
| PSRR | 60–65 dB @ 120 Hz - suppresses ripple from upstream switching supplies feeding the LDO. |
| Thermal Resistance (RthJA) | 164 K/W (bare footprint) - requires PCB copper area or heatsink for sustained 1.0 A at >85 °C ambient. |
| Operating Junction Temp | 0 to 125 °C - qualified for industrial environments without derating below 125 °C. |
| Output Noise | 30 ppm RMS (10 Hz–10 kHz) - equivalent to ~100 µV RMS, suitable for noise-sensitive analog circuits. |
Pinout & Package
Package: PG-SOT223 - surface-mount, thermally enhanced plastic package with exposed tab (pin 4) electrically connected to output (Q) and used for PCB heatsinking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal bias and error amplifier; must be low-impedance connection to system ground plane. |
| 2 | Q (Output) | Regulated 3.3 V output; requires ≥10 µF ceramic or tantalum capacitor (ESR ≤20 Ω) for stability. |
| 3 | I (Input) | Unregulated DC input (4.7–15 V); must include local decoupling (e.g., 100 nF) near pin. |
| 4 (TAB) | Q (Output / Thermal Pad) | Electrically tied to pin 2; soldered to large PCB copper area for thermal dissipation and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 3.3 V output | No external resistors needed - simplifies BOM and layout for standard logic rail generation. |
| Integrated overtemperature shutdown | Auto-recovery thermal protection triggers at ~150 °C junction - prevents permanent damage during overload or poor heatsinking. |
| Short-circuit current limiting | Foldback behavior limits peak output current to 1100–2250 mA - avoids destructive latch-up during output faults. |
| Low-noise 30 ppm RMS output | Enables direct powering of precision analog front-ends (e.g., 12-bit ADCs) without additional filtering. |
| RoHS-compliant green product | Meets EU Directive 2011/65/EU - supports environmental compliance for industrial and export-bound designs. |
Applications
| Industrial PLC I/O Modules | Automotive Body Control Units (Non-Safety) |
|---|---|
Use Scenario: Powering isolated digital I/O drivers and RS-485 transceivers in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Primary 3.3 V rail generator for FPGA configuration, CAN interface ICs, and optocoupler biasing. Use Value: Stable 3.3 V output maintains logic integrity across wide ambient (-25 to +70 °C) and withstands 15 V transients on input bus. | Use Scenario: Supplying infotainment MCU cores and display backlight drivers in non-safety-critical vehicle subsystems. IC Role / Device Role / Timing Role: Secondary LDO after main DC-DC converter; provides clean 3.3 V for ARM Cortex-M4 processors and touch controller ICs. Use Value: 65 dB PSRR attenuates switching noise from 5 V buck converter, reducing digital jitter in audio DAC paths. |
| Medical Patient Monitoring Sensors | Smart Energy Metering Hardware |
Use Scenario: Powering low-power analog sensor signal chains (ECG, SpO₂) in portable diagnostic devices. IC Role / Device Role / Timing Role: Precision analog rail source - feeds instrumentation amplifiers and 16-bit SAR ADCs requiring low-noise, stable reference. Use Value: 30 ppm RMS noise (≈100 µV) avoids adding quantization error; ±2% tolerance ensures consistent gain calibration. | Use Scenario: Regulating 3.3 V for metrology SoCs (e.g., TI MSP430FE427), RTCs, and isolated communication interfaces (M-Bus, PLC). IC Role / Device Role / Timing Role: Main system rail LDO - powers real-time clock, flash memory, and secure element ICs in utility-grade meters. Use Value: 125 °C max junction rating supports sealed, convection-limited enclosures; RoHS compliance meets global utility procurement mandates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV1117-33CDCR (TI) | Lower dropout (1.2 V @ 800 mA), higher PSRR (70 dB), but RthJA = 199 K/W (SOIC-8) - less thermally efficient in same footprint. | Preferred where input headroom is tighter (<4.5 V) and board space allows SOIC-8; not drop-in compatible due to different pinout and package. | Select if lower dropout and higher PSRR outweigh thermal limitations and require SOIC-8 assembly compatibility. |
| LD1117S33TR (STMicro) | Same SOT-223-4 pinout and 3.3 V fixed output, but ±2% tolerance only at 25 °C; wider temp drift (±0.2%/°C vs Infineon's ±0.013%/°C design spec). | Better suited for cost-sensitive consumer applications where full-temp-range accuracy is not critical. | Choose for price-driven designs with relaxed accuracy requirements over temperature; verify stability with same CQ/ESR. |
Compared with TLV1117-33CDCR and LD1117S33TR, the IFX1117MEV33 offers superior thermal performance in SOT-223 (RthJA = 164 K/W), tighter full-temperature output tolerance (±2% over 0–125 °C), and integrated foldback current limiting - making it optimal for thermally constrained industrial systems requiring long-term regulation stability.
Availability
IFX1117MEV33 is available at Aetrix Electronics and suitable for industrial PLCs, medical sensor modules, smart energy meters, and automotive body control units requiring stable component supply, long lifecycle support, and RoHS-compliant sourcing.
Supply support for IFX1117MEV33 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 ISO 9001.
The IFX1117 series targets industrial and transportation applications needing robust, thermally efficient LDOs - designed for reliability in extended temperature ranges and harsh electrical environments, distinct from automotive-qualified TLE/TLF families.
FAQ
What is the minimum input voltage required for 1.0 A output at 3.3 V?
The IFX1117MEV33 requires a minimum input voltage of 4.7 V to sustain 1.0 A output while maintaining regulation. This accounts for its typical 1.3–1.4 V dropout at full load. Below 4.7 V, output voltage drops below 3.3 V, and regulation is lost - verified per Table 5 and Figure 4 test conditions in the official datasheet Rev. 1.0.
Can IFX1117MEV33 be used without an output capacitor?
No. The device requires a minimum 10 µF output capacitor with ESR ≤20 Ω (ceramic or tantalum) connected between pin 2 (Q) and GND to ensure stability across all load and temperature conditions. Omission causes oscillation or overshoot, as confirmed by the "Region of Stability" graph and application circuit Figure 5 in the datasheet.
Is the exposed tab (pin 4) electrically isolated?
No. Pin 4 (TAB) is internally connected to pin 2 (Q, output) and must be soldered to a PCB copper pour serving as both thermal path and electrical node. It is not isolated - using it as ground or floating violates absolute maximum ratings and risks device failure, per Table 1 and Figure 2 pin definitions.
Does IFX1117MEV33 support reverse-polarity input protection?
No. The device lacks internal reverse-voltage protection. Applying negative input voltage relative to GND (VI < –0.3 V) exceeds absolute maximum rating and may cause permanent damage, as specified in Table 3. External protection (e.g., series diode or MOSFET-based circuit) is required in systems prone to polarity reversal.
IFX1117MEV33 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- TO-261-4, TO-261AA
- Packaging:
- Bulk
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 15V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.4V @ 1A
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- 10 mA
- Current - Supply (Max):
- -
- PSRR:
- 65dB (120Hz)
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- 0°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PG-SOT223-4
IFX1117MEV33 FAQ
1.How can I place an order for IFX1117MEV33 through Aetrix?
Please submit a Request for Quotation (RFQ) for IFX1117MEV33 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 IFX1117MEV33 reliable?
The price and inventory of IFX1117MEV33 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IFX1117MEV33 is usually 5 days.
3.What payment methods are accepted for IFX1117MEV33?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IFX1117MEV33 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IFX1117MEV33?
IFX1117MEV33 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IFX1117MEV33 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 IFX1117MEV33?
For technical support, including IFX1117MEV33 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IFX1117MEV33 requirements.
6.How does Aetrix verify that IFX1117MEV33 is sourced from the original manufacturer or authorized distributors?
All IFX1117MEV33 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 IFX1117MEV33 meets industry standards.
7.What is the process for return or replacement of IFX1117MEV33?
All IFX1117MEV33 units undergo pre-shipment inspection (PSI). If there is an issue with IFX1117MEV33, 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 IFX1117MEV33 part is unused and in its original packaging.
Return procedure for IFX1117MEV33:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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