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

Infineon Technologies IR3837MTR1PBF

Name: IR3837MTR1PBF
Brand: Infineon Technologies
SKU: IR3837MTR1PBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IR3837MTR1PBF

Manufacturer:: Infineon Technologies

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 17-VQFN

Datasheet:: IR3837MTR1PBF.pdf

Description:: IC REG BUCK ADJ 14A 17PQFN

Quantity:: RFQ Add To RFQ list

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Product details

Overview

IR3837MTR1PBF from Infineon Technologies is a highly integrated 14A synchronous buck regulator with internal MOSFETs, PWM controller, and LDO. It delivers regulated output voltages from 0.6V to 0.9×Vin across 1.5–16V input, supports programmable 225–1650kHz switching frequency, and features hiccup-mode overcurrent protection, pre-bias startup, and power-good tracking-used in data center point-of-load power delivery.

For engineers reviewing the IR3837MTR1PBF datasheet, IR3837MTR1PBF pinout, IR3837MTR1PBF application, or IR3837MTR1PBF equivalent, key selection criteria include its 14A continuous load capability, 5mm×6mm PQFN package with 17-pin layout, margining via Vref pin, external synchronization support, and thermal shutdown at 140°C junction temperature.

Technical Context

The IR3837MTR1PBF implements a current-mode controlled synchronous buck architecture with integrated high-side (12mΩ typical R_DS(on)) and low-side (5.3mΩ) MOSFETs, bootstrap diode, and gate drivers. Its error amplifier supports both feedback (Fb) and tracking (Vp) inputs, enabling precise output regulation and system-level voltage sequencing.

Switching frequency is set externally via resistor on Rt pin (225–1650kHz range), while OCset pin configures current limit threshold using a resistor to SW. The device operates from a single PVin supply or an external 4.5–6.5V bias on Vcc/LDO_out, with internal LDO bypassable for efficiency optimization.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Current	14A continuous-supports high-density server VRMs without external current sharing.
Input Voltage Range	1.5V to 16V-enables use with 3.3V, 5V, 12V, and 15V intermediate bus architectures.
Output Voltage Range	0.6V to 0.9×Vin-covers core logic, FPGA, and ASIC supply requirements with adaptive headroom.
Switching Frequency	225kHz to 1650kHz-adjustable via Rt resistor to balance efficiency, size, and EMI in compact layouts.
Efficiency	Up to 96% at 12V_IN/1.8V_OUT/14A-minimizes thermal load in thermally constrained 1U systems.
Junction Temp Range	−40°C to +125°C-qualified for industrial and telecom environments with full spec compliance.
Package	5mm × 6mm PQFN, 0.9mm height-enables high-power density with low-inductance thermal pad and exposed PGnd.

Pinout & Package

IR3837MTR1PBF uses a 17-pin Power QFN (PQFN) package with 5mm × 6mm footprint and 0.9mm profile. Thermal pad (PGnd) is exposed on bottom for PCB-level heat dissipation. Pin 1 is Fb (feedback inverting input), located at top-left corner per standard top-view orientation.

Pin/Terminal	Circuit Role	Design Meaning
1 Fb	Inverting input of error amplifier	Connects to output via resistor divider to set regulated voltage; determines accuracy and loop stability.
2 Vref	External reference input	Enables output margining (±10%) and tracking; requires 100nF decoupling to Gnd.
3 Comp	Error amplifier output	Drives external RC compensation network between Comp and Fb to stabilize control loop.
4 & 17 Gnd	Signal ground reference	Provides low-noise reference for internal analog circuitry; separate from power ground (PGnd).
5 Rt	Frequency programming input	Resistor to Gnd sets switching frequency; 59kΩ → ~250kHz, 9.53kΩ → ~1.5MHz.
6 OCset	Current limit threshold input	Resistor from OCset to SW sets peak inductor current limit; enables precise overcurrent protection.
7 PGood	Open-drain power-good status	Asserts high when output is within ±15% of target; tracks Vref or Vp depending on configuration.
8 Sync	External clock synchronization input	Accepts TTL/CMOS clock 20% above free-running frequency; eliminates beat frequencies in multi-rail systems.
9 Vin	LDO input supply	Supplies internal 5V LDO when external bias not used; requires 1µF decoupling to PGnd.
10 Vcc/LDO_out	LDO output / bias supply	Provides 4.7–5.7V for internal circuitry; can be bypassed with external 5V supply to improve efficiency.
11 PGnd	Power ground terminal	Low-impedance return path for MOSFET drivers and power stage; must connect to system power plane.
12 SW	Switch node	Connects to inductor and bootstrap capacitor; carries high dv/dt switching waveform.
13 PVin	Main power input	High-current input for power stage (1.5–16V); routed separately from signal paths to minimize noise coupling.
14 Boot	Bootstrap supply	Charges high-side driver via 100nF capacitor to SW; enables N-channel high-side MOSFET operation.
15 Enable	Startup/shutdown control	Active-high enable with UVLO (1.2V start/0.85V stop); supports resistor-divider input monitoring.
16 Vp	Tracking input	Allows output to follow external voltage rail; used for sequencing or dynamic voltage scaling.

Key Features

Feature	Design Value
Integrated MOSFETs + Drivers	Eliminates external gate drivers and discrete FETs; reduces BOM count and layout area by >40% vs discrete solutions.
Programmable Switching Frequency	225–1650kHz tuning enables optimal trade-off between inductor size, efficiency, and EMI filtering requirements.
Pre-Bias Startup	Allows safe turn-on into pre-charged output capacitors-critical for hot-swap and redundant power systems.
Margining via Vref Pin	Supports ±10% output adjustment for production testing and system validation without hardware changes.
Thermal Shutdown with Hysteresis	Shuts down at 140°C with 20°C hysteresis to prevent cycling; protects against sustained overload or airflow loss.

Applications

Server VRM

Telecom Line Card

Use Scenario: Regulating 1.8V/14A core supply for dual-socket Xeon processors in 1U rack servers.

IC Role / Device Role / Timing Role: Primary point-of-load regulator with fast transient response and accurate voltage setting via Fb divider.

Use Value: Delivers >95% efficiency at full load, reducing board-level heat density and enabling fanless operation in edge deployments.

Use Scenario: Providing 3.3V/10A power to packet processing ASICs on carrier-grade line cards with strict thermal limits.

IC Role / Device Role / Timing Role: Synchronous buck converter with tracking (Vp) input to follow upstream 5V rail during power sequencing.

Use Value: Ensures reliable startup under pre-biased conditions and maintains tight regulation across −40°C to +85°C ambient.

AI Accelerator Module

Industrial PLC CPU Board

Use Scenario: Delivering 0.85V/12A to GPU-like AI inference accelerators requiring dynamic voltage scaling.

IC Role / Device Role / Timing Role: Programmable buck regulator with Vref-based margining for functional safety validation and voltage tolerance testing.

Use Value: Enables ±5% output adjustment during burn-in and field calibration without changing feedback resistors.

Use Scenario: Supplying 1.2V/8A to ARM Cortex-A series CPUs in ruggedized programmable logic controllers.

IC Role / Device Role / Timing Role: High-reliability DC/DC regulator with hiccup-mode OCP and thermal shutdown for unattended operation.

Use Value: Prevents latch-up during short-circuit events and sustains operation up to 125°C junction temperature.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MP2451DT-LF-Z	6A max output, no integrated high-side FET, requires external bootstrap capacitor and gate driver.	Limited to lower-current applications; lacks pre-bias startup and margining capability.	Select when cost sensitivity outweighs integration needs and load < 8A.
TPS544B20RJER	15A rated, supports PMBus interface and digital telemetry; larger 6mm × 6mm QFN package.	Enables real-time monitoring and dynamic configuration; adds firmware dependency and layout complexity.	Select when telemetry, remote margining, or multi-rail coordination is required.

Compared with MP2451DT-LF-Z and TPS544B20RJER, IR3837MTR1PBF offers superior integration (MOSFETs + drivers + LDO + bootstrap diode), smaller footprint (5×6mm), and analog margining simplicity-making it optimal for space-constrained, high-current analog-controlled PoL designs.

Availability

IR3837MTR1PBF is available at Aetrix Electronics and suitable for data center server VRMs, telecom line card power supplies, AI accelerator modules, and industrial PLC CPU boards requiring stable component supply and long-term lifecycle support.

Supply support for IR3837MTR1PBF 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 global manufacturing and quality certification to ISO/TS 16949 and IECQ QC 080000.

The IR3837 belongs to Infineon's SupIRBuck™ family-designed specifically for high-efficiency, high-current point-of-load regulation in space-constrained networking, computing, and telecom infrastructure equipment.

FAQ

What is the recommended input capacitor configuration for IR3837MTR1PBF?

A minimum 10µF ceramic capacitor should be placed between PVin and PGnd close to pins 13 and 11. For best ripple suppression and transient response, combine with bulk capacitance (e.g., 47–100µF tantalum or polymer) near the input connector. Total effective capacitance must meet peak current demand and maintain PVin droop below 1.5V under 14A step load.

How does the Vref pin enable margining, and what external components are required?

Vref accepts an external voltage (0.54–1.2V) to shift the feedback reference, enabling ±10% output margining. A 100nF ceramic capacitor must be connected from Vref to Gnd for noise immunity. When used with tracking (Vp), Vref also defines upper/lower thresholds for the tracker comparator (1.05–1.6V range).

Can IR3837MTR1PBF operate without the internal LDO enabled?

Yes-when a stable 4.5–6.5V external bias is applied to Vcc/LDO_out, the internal LDO is automatically bypassed. In this mode, Vin pin must be left floating, and the external supply must handle all internal circuitry current (up to 50mA). This improves light-load efficiency by eliminating LDO dropout losses.

What is the purpose of the OCset pin, and how is current limit set?

OCset sets the peak inductor current limit via a resistor connected between OCset and SW. Typical values range from 9.53kΩ (77µA IOCSET → ~14A limit at 12V_IN/1.8V_OUT) to 28.7kΩ (24.4µA → ~7A). The relationship is linear: IOCSET = 0.8V / R_OCset, and current limit scales with input/output voltage ratio and inductor DCR.

IR3837MTR1PBF Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: SupIRBuck®

Package/Case:: 17-VQFN

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Function:: Step-Down

Output Configuration:: Positive

Topology:: Buck

Output Type:: Adjustable

Number of Outputs:: 1

Voltage - Input (Min):: 7V

Voltage - Input (Max):: 16V

Voltage - Output (Min/Fixed):: 0.6V

Voltage - Output (Max):: 14.4V

Current - Output:: 14A

Frequency - Switching:: 225kHz ~ 1.65MHz

Synchronous Rectifier:: Yes

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 17-PQFN (5x6)

IR3837MTR1PBF FAQ

1.How can I place an order for IR3837MTR1PBF through Aetrix?

Please submit a Request for Quotation (RFQ) for IR3837MTR1PBF 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 IR3837MTR1PBF reliable?

The price and inventory of IR3837MTR1PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IR3837MTR1PBF is usually 5 days.

3.What payment methods are accepted for IR3837MTR1PBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IR3837MTR1PBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IR3837MTR1PBF?

IR3837MTR1PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IR3837MTR1PBF 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 IR3837MTR1PBF?

For technical support, including IR3837MTR1PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IR3837MTR1PBF requirements.

6.How does Aetrix verify that IR3837MTR1PBF is sourced from the original manufacturer or authorized distributors?

All IR3837MTR1PBF 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 IR3837MTR1PBF meets industry standards.

7.What is the process for return or replacement of IR3837MTR1PBF?

All IR3837MTR1PBF units undergo pre-shipment inspection (PSI). If there is an issue with IR3837MTR1PBF, 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 IR3837MTR1PBF part is unused and in its original packaging.

Return procedure for IR3837MTR1PBF:

1.Submit a request within 90 days.

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

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