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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - DC DC Switching Regulators

Infineon Technologies 111-4190PBF

Name: 111-4190PBF
Brand: Infineon Technologies
SKU: 111-4190PBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 111-4190PBF

Manufacturer:: Infineon Technologies

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 34-PowerVFQFN

Datasheet:: 111-4190PBF.pdf

Description:: IC REG BUCK ADJ 25A 34PQFN

Quantity:: RFQ Add To RFQ list

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Product details

Overview

111-4190PBF from Infineon Technologies is a digitally configurable, synchronous buck DC/DC converter with integrated MOSFETs, PMBus/I²C interface, 25 A output current capability, 0.5 V to 0.875×PV_IN output voltage range, and operation from a single 5.5–21 V input supply. It delivers precise power to server VRMs, telecom POL stages, and high-density embedded systems.

For engineers reviewing the 111-4190PBF datasheet, 111-4190PBF pinout, 111-4190PBF application, or 111-4190PBF equivalent, key selection criteria include its programmable 225–1650 kHz switching frequency, ±0.5% reference accuracy, thermally compensated overcurrent protection, remote differential sensing, and dual-mode (analog/digital) operation without firmware dependency.

Technical Context

The IR38063 architecture integrates a PWM controller, high-side (2.7–5.6 mΩ) and low-side (1.11–2.05 mΩ) MOSFETs, bootstrap diode, and LDO for single-rail 21 V operation. Its digital control loop supports 66 PMBus commands for real-time telemetry (V_OUT, I_OUT, T_J), fault logging, and sequencing-while retaining analog mode fallback via EN/FCCM and RT/SYNC pins.

True differential remote sensing (RS+/RS−), dedicated OVP/PGood sensing (Vsns), and independent track-enable logic enable precise load-point regulation in multi-rail systems. The device maintains active output voltage monitoring even when EN is deasserted, ensuring safe power-down sequencing in distributed architectures.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Current	25 A continuous - supports high-current CPU/GPU core rails without external current sharing.
Input Voltage Range	5.5–21 V - enables direct connection to 12 V or 19 V intermediate bus without pre-regulation.
Output Voltage Range	0.5 V to 0.875×PV_IN - dynamically scales with input for optimal efficiency across wide VIN conditions.
Reference Accuracy	±0.5% (0°C–85°C) - ensures tight output regulation critical for sub-1 V ASIC/FPGA core supplies.
Switching Frequency	225–1650 kHz - adjustable via RT resistor or PMBus; higher frequencies reduce inductor size, lower frequencies improve light-load efficiency.
Junction Temp Range	−40°C to +125°C - validated for sustained operation in thermally constrained server and telecom chassis environments.
Thermal Resistance	θ_J-PCB = 2.05°C/W - optimized thermal path through exposed PQFN pad enables >20 W dissipation on standard 4-layer PCBs.

Pinout & Package

111-4190PBF uses a thermally enhanced 5 mm × 7 mm PQFN package with 26-pin layout (pins 23 and 26 internally connected). Exposed thermal pad requires solder connection to PCB ground plane for thermal performance.

Pin/Terminal	Circuit Role	Design Meaning
PVIN	Main power stage input	Connects to 5.5–21 V bus; requires local 4×22 µF + 0.1 µF ceramic bypassing to PGND for EMI suppression.
SW	Power switch node	Drives external inductor; voltage swing up to 25 V (DC); must be routed with minimal loop area to limit ringing.
FB	Feedback input	Inverting error amplifier input; connects directly to output or remote sense divider to set V_OUT with <±0.5% accuracy.
RS+, RS−	Differential remote sense inputs	Measure true load voltage at point-of-load; reject IR drop in PCB traces for <±1% regulation error.
RT/SYNC	Frequency configuration	Analog mode: sets f_SW via resistor to LGND; digital mode: accepts external clock for synchronized multi-phase operation.
SDA/IMON, SCL/OCSet, SALERT/TMON	PMBus interface & analog telemetry	Provide I_OUT, OCP threshold, and T_J as analog voltages when PMBus disabled - enabling hybrid analog/digital system integration.

Key Features

Feature	Design Value
Integrated MOSFETs + Bootstrap Diode	Eliminates 4 external components; reduces BOM count and layout area while maintaining 92% peak efficiency at 12 V_IN/1 V_OUT/20 A.
Pre-bias Soft-Start	Enables safe startup into pre-charged output capacitors - prevents reverse current flow in hot-swap or multi-rail sequencing applications.
Dedicated Vsns Pin	Provides independent OVP and PGood monitoring that remains active during EN=low - guarantees reliable power-good signaling during system reset sequences.
Light Load Efficiency Mode	Automatically transitions to pulse-skipping mode below ~1 A load - improves efficiency at 10 mA to 1 A by >15 percentage points vs. forced CCM.
Thermally Compensated OCL	Adjusts current limit threshold based on junction temperature - prevents false trips during transient thermal events while maintaining safety margin at max T_J.

Applications

Server CPU Core Supply

Telecom Baseband Processor Rail

Use Scenario: Delivering tightly regulated 0.8 V @ 25 A to high-performance x86 CPU cores in 1U rack servers with strict thermal envelope.

IC Role / Device Role / Timing Role: Primary point-of-load regulator with PMBus telemetry for dynamic voltage/frequency scaling (DVFS) coordination.

Use Value: ±0.5% reference accuracy and remote sensing maintain <±1% output deviation under 10 A/µs load transients, reducing need for bulk capacitance.

Use Scenario: Powering multi-core baseband SoCs in 5G macrocell radios requiring fast transient response and thermal-aware current limiting.

IC Role / Device Role / Timing Role: Digitally configured POL regulator supporting runtime reconfiguration of V_OUT and OCP thresholds via PMBus during RF mode changes.

Use Value: Thermally compensated OCL prevents shutdown during burst transmit cycles while maintaining safe junction temperature under ambient >85°C.

Embedded Network Switch ASIC Rail

Distributed Data Center Storage Controller

Use Scenario: Supplying 0.75 V @ 20 A to packet processing ASICs in layer-3 switches with multi-rail sequencing requirements.

IC Role / Device Role / Timing Role: Sequencing-capable buck regulator using Track_EN and Vp pins to align power-up with companion I/O and memory rails.

Use Value: Independent tracking enable logic allows precise ramp alignment within ±100 µs of adjacent rails without external timing ICs.

Use Scenario: Providing isolated 0.6 V core supply to NVMe SSD controllers in high-density storage blades with shared thermal management.

IC Role / Device Role / Timing Role: Analog-mode fallback regulator delivering telemetry (I_OUT, T_J) as analog voltages to legacy BMCs lacking PMBus support.

Use Value: SDA/IMON and SALERT/TMON pins output calibrated 0–2 V signals proportional to load current and die temperature - enabling hardware-only thermal derating.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MP8772GQ-Z (Monolithic Power)	20 A rating, no integrated PMBus; I²C only; 0.6–5.5 V V_OUT; requires external current sense resistor.	Lacks telemetry, sequencing, and thermally compensated OCL - suitable for cost-sensitive, non-telemetric POLs.	Select when PMBus telemetry and autonomous thermal protection are not required, and board space permits external sense resistor placement.
TPS546D24RQF (Texas Instruments)	30 A rating, full PMBus 1.3 compliance, integrated EEPROM, higher pin count (32-QFN), 0.5–2.0 V V_OUT.	Supports more complex multi-phase configurations and deeper telemetry logging - targets enterprise-grade server VRMs.	Select when >25 A output, extended PMBus command set (e.g., black-box fault logging), or multi-phase synchronization is mandatory.

Compared with MP8772GQ-Z and TPS546D24RQF, the 111-4190PBF balances digital configurability and analog fallback in a compact 5×7 mm footprint - making it optimal for mid-tier telecom and embedded systems where telemetry depth and thermal robustness exceed basic I²C needs but full enterprise VRM complexity is unnecessary.

Availability

111-4190PBF is available at Aetrix Electronics and suitable for server CPU core supplies, telecom baseband processor rails, and embedded network switch ASIC applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for 111-4190PBF 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 leader specializing in power management, automotive MCUs, and industrial control ICs, with global manufacturing and quality certification to ISO/TS 16949 and IATF 16949 standards.

The SupIRBuck™ product line delivers fully integrated, digitally configurable DC/DC regulators targeting high-efficiency, high-density point-of-load conversion in data center, networking, and telecom infrastructure equipment.

FAQ

Can 111-4190PBF operate without PMBus communication?

Yes. The device defaults to analog mode on power-up if ADDR is floating and no PMBus activity occurs. In analog mode, output voltage is set via FB resistor divider, switching frequency via RT resistor, and OCP threshold via OCSet pin. All telemetry (I_OUT, T_J) remains accessible as analog voltages on SDA/IMON and SALERT/TMON pins.

What is the minimum output voltage achievable with 111-4190PBF?

The minimum output voltage is 0.5 V, specified across the full operating temperature range (−40°C to +125°C) and input voltage range (5.5–21 V). This is enforced by internal reference scaling and validated by electrical testing per Rev 2.17 datasheet Section 7, Table 2.

How does the Track_EN pin function in multi-rail sequencing?

Track_EN# is an active-low input that enables voltage-tracking mode. When pulled low, the device follows the voltage ramp of another regulator connected to the Vp pin. For non-tracking use, it must be biased to P1V8 via 100 kΩ (preferred) or to LGND via 750 kΩ - leaving it floating is not permitted per datasheet Section 3, Pin Descriptions.

Is external boot resistor required for PVIN > 16 V operation?

Yes. For PVIN > 16 V, a 1–4.02 Ω resistor must be placed in series with the 0.1 µF boot capacitor between BOOT and SW pins to limit peak gate driver current and prevent overstress. This requirement is specified in Pin Description #2 and validated in thermal simulations across −40°C to +150°C per datasheet footnote on page 5.

111-4190PBF Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: SupIRBuck®

Package/Case:: 34-PowerVFQFN

Packaging:: Tape & Reel (TR)

Product Status:: Discontinued at Digi-Key

Function:: Step-Down

Output Configuration:: Positive

Topology:: Buck

Output Type:: Adjustable

Number of Outputs:: 1

Voltage - Input (Min):: 1.2V

Voltage - Input (Max):: 21V

Voltage - Output (Min/Fixed):: 0.5V

Voltage - Output (Max):: 18.38V

Current - Output:: 25A

Frequency - Switching:: 400kHz ~ 1.5MHz

Synchronous Rectifier:: Yes

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 34-PQFN (5x7)

111-4190PBF FAQ

1.How can I place an order for 111-4190PBF through Aetrix?

Please submit a Request for Quotation (RFQ) for 111-4190PBF 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 111-4190PBF reliable?

The price and inventory of 111-4190PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 111-4190PBF is usually 5 days.

3.What payment methods are accepted for 111-4190PBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 111-4190PBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 111-4190PBF?

111-4190PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 111-4190PBF 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 111-4190PBF?

For technical support, including 111-4190PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 111-4190PBF requirements.

6.How does Aetrix verify that 111-4190PBF is sourced from the original manufacturer or authorized distributors?

All 111-4190PBF 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 111-4190PBF meets industry standards.

7.What is the process for return or replacement of 111-4190PBF?

All 111-4190PBF units undergo pre-shipment inspection (PSI). If there is an issue with 111-4190PBF, 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 111-4190PBF part is unused and in its original packaging.

Return procedure for 111-4190PBF:

1.Submit a request within 90 days.

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

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