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

Infineon Technologies IR3838MTRPBF

Name: IR3838MTRPBF
Brand: Infineon Technologies
SKU: IR3838MTRPBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IR3838MTRPBF

Manufacturer:: Infineon Technologies

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 17-VQFN

Datasheet:: IR3838MTRPBF.pdf

Description:: IC REG BUCK ADJ 10A 17PQFN

Quantity:: RFQ Add To RFQ list

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Inventory:1,536

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Product details

Overview

IR3838MTRPBF from Infineon Technologies is a highly integrated 10A synchronous buck regulator with onboard PWM controller, high- and low-side MOSFETs, bootstrap diode, and internal LDO. It delivers regulated output voltages from 0.6V to 0.9×Vin across 1.5–16V input, supports programmable switching frequency (225–1650 kHz), and features hiccup-mode overcurrent protection, pre-bias startup, and power-good tracking - deployed in data center point-of-load rails.

For engineers reviewing the IR3838MTRPBF datasheet, IR3838MTRPBF pinout, IR3838MTRPBF application, or IR3838MTRPBF equivalent, key selection criteria include its 10A continuous load capability, margining via Vref pin, external synchronization support, and thermal shutdown at 140°C junction temperature.

Technical Context

The IR3838 implements a current-mode control architecture with an integrated error amplifier, digital soft-start clock (168–254 kHz), and adjustable oscillator via RT resistor. Its feedback loop accepts either resistive divider (FB pin) or external reference (Vref) for precision margining, while the tracker input (VP) enables output voltage tracking in multi-rail systems.

Protection logic includes cycle-by-cycle current limiting set by OCSET resistor, thermal shutdown with 20°C hysteresis, UVLO on both EN and VCC pins, and overvoltage detection independent of FB. The PGood output tracks Vref or VP depending on Vref voltage level, ensuring accurate rail status reporting during margining or tracking operation.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Current	10 A continuous - supports high-density server CPU/GPU core rails without external current sharing.
Input Voltage Range	1.5 V to 16 V - compatible with 3.3 V, 5 V, and 12 V intermediate bus architectures.
Output Voltage Range	0.6 V to 0.9×Vin - enables sub-1V core supplies with adaptive headroom for dynamic load steps.
Switching Frequency	225 kHz to 1650 kHz - adjustable via RT resistor; allows optimization of size (inductor/capacitor) vs. efficiency/noise.
Efficiency	Up to 96% at 12 V_IN/1.8 V_OUT/10 A - minimizes thermal load in confined 5 mm × 6 mm PQFN footprint.
Junction Temp Range	−40 °C to +125 °C - qualified for industrial and telecom infrastructure environments.
Package	17-pin Power QFN (5 mm × 6 mm, 0.9 mm height) - thermally enhanced layout with separate PGND and signal GND pins.

Pinout & Package

IR3838MTRPBF uses a thermally optimized 17-pin Power QFN package (5 mm × 6 mm, 0.9 mm height) with exposed thermal pad. Signal and power grounds are physically separated to minimize noise coupling between control circuitry and high-current switching paths.

Pin/Terminal	Circuit Role	Design Meaning
Fb	Inverting input of error amplifier	Connects to output voltage divider; sets regulation point with ±1% typical accuracy at 25°C.
Vref	External reference input	Enables precise output margining (±10%); PGood tracks Vref during margining mode.
Comp	Error amplifier output	Interface for external compensation network (R+C from Comp to Fb) to stabilize control loop.
Rt	Oscillator frequency setting	Resistor to GND sets switching frequency (e.g., 59 kΩ → 250 kHz; 9.53 kΩ → 1.5 MHz).
OCset	Current limit threshold	Resistor from OCset to SW sets peak inductor current limit; supports scalable overcurrent protection.
Pgood	Open-drain power-good indicator	Asserts when output is within ±15% of target; tracks Vref or VP depending on Vref voltage level.
Sync	External clock input	Accepts TTL/CMOS clock up to 1.65 MHz; requires external clock ≥20% above free-running frequency.
Enable	Startup/shutdown control	UVLO thresholds: 1.2 V start / 0.85 V stop; supports input voltage monitoring via resistor divider.

Key Features

Feature	Design Value
Integrated MOSFET drivers + bootstrap diode	Eliminates need for external high-side gate driver and discrete bootstrap diode, reducing BOM count and layout area.
Internal LDO (4.7–5.7 V output)	Provides bias for control circuitry from PVin; bypassable when external 5 V supply is available, improving system efficiency.
Digital soft-start (10 ms delay)	Prevents inrush current during startup; ramp rate fixed at 0.2 mV/μs for predictable output rise time.
Enhanced pre-bias startup	Allows safe startup into pre-charged output capacitors without reverse current flow or output collapse.
Tracking input (VP pin)	Supports coordinated sequencing of multiple rails by referencing VP to another regulator's output or reference.

Applications

Server CPU Core Rail

Network Switch ASIC Supply

Use Scenario: High-current, low-voltage power delivery to multi-core x86 processors in 1U rack servers.

IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering 0.8–1.2 V at up to 10 A with fast transient response.

Use Value: Integrated MOSFETs and 96% peak efficiency reduce board area and thermal management complexity in space-constrained chassis.

Use Scenario: Powering high-speed SerDes and packet processing ASICs in 10/25/100 GbE switches.

IC Role / Device Role / Timing Role: Synchronous buck converter supplying 1.0 V or 1.2 V core rails with tight regulation and sequencing support.

Use Value: VP pin enables tracking with I/O supply; PGood output ensures correct power-up order before ASIC initialization.

Data Center GPU Memory Rail

Telecom Baseband Processor Supply

Use Scenario: Delivering stable 0.9 V to GDDR6 memory interfaces on AI accelerator cards.

IC Role / Device Role / Timing Role: High-efficiency buck regulator operating at 1 MHz to minimize inductor size while maintaining ripple <15 mV.

Use Value: Programmable frequency and small 5×6 mm footprint enable dense placement near memory stacks with minimal PCB real estate.

Use Scenario: Powering multi-core baseband processors in 4G/5G remote radio units requiring −40°C to +85°C operation.

IC Role / Device Role / Timing Role: Robust PoL regulator with thermal shutdown (140°C) and wide input range (3.3–12 V) for variable front-end supplies.

Use Value: Pre-bias startup and hiccup-mode OCP ensure reliable operation during hot-swap events and short-circuit faults in field-deployed equipment.

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	6 A max output, fixed 2 MHz switching, no Vref margining or VP tracking pin	Suitable for lower-current, cost-sensitive embedded applications; lacks advanced sequencing features	Select when 6 A suffices and margining/tracking is unnecessary; smaller 3×3 mm QFN package
TPS546B24RVFR	15 A output, PMBus interface, digital control, 3.3–18 V input, larger 6×6 mm VQFN	Required for telemetry, dynamic voltage scaling, and firmware-configurable protection in high-end servers	Select when digital configurability, higher current, or telemetry is needed; not pin-compatible

Compared with MP2451DT-LF-Z and TPS546B24RVFR, IR3838MTRPBF offers balanced integration-10 A analog control with margining, tracking, and robust protection-without digital overhead or excessive footprint, making it optimal for analog-centric, high-reliability PoL designs.

Availability

IR3838MTRPBF is available at Aetrix Electronics and suitable for data center power delivery, telecom infrastructure, and distributed point-of-load applications requiring stable component supply, extended temperature operation, and high-efficiency DC/DC conversion.

Supply support for IR3838MTRPBF 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 leadership in silicon and GaN-based power solutions.

The SupIRBuck™ product line delivers fully integrated, high-current synchronous buck regulators targeting space-constrained, high-efficiency point-of-load applications in networking, computing, and telecom infrastructure.

FAQ

What is the minimum recommended output capacitance for stable operation at 10 A?

The IR3838MTRPBF datasheet specifies stability with ≥220 µF total output capacitance using low-ESR ceramic or polymer capacitors. For 10 A loads, a typical design uses four 100 µF/6.3 V X5R ceramics in parallel (400 µF total) with ≤5 mΩ combined ESR to meet transient response and ripple requirements under full load step conditions.

Can the internal LDO be disabled and powered externally?

Yes - the internal LDO can be bypassed by applying a regulated 4.5–6.5 V supply directly to the VCC/LDO_out pin and leaving the VIN pin floating. This reduces power loss in the LDO stage and improves overall efficiency when an external bias rail is available, as confirmed in the Recommended Operating Conditions table.

How does the OCSET pin determine current limit threshold?

The OCSET pin senses voltage drop across a sense resistor connected between OCSET and SW. At 25°C, 24.4 µA flows into OCSET when Fs = 500 kHz; the resulting voltage sets the peak inductor current limit. For example, a 10 kΩ resistor yields ~244 mV threshold, corresponding to ~10 A with typical R_DS(on) and inductor DCR values.

Is the IR3838MTRPBF RoHS-compliant and lead-free?

Yes - IR3838MTRPBF is lead-free, halogen-free, and RoHS-compliant per EU Directive 2011/65/EU. It meets JEDEC moisture sensitivity level MSL2 at 260°C and carries the "PbF" suffix in its marking, confirming compliance with environmental and assembly standards for modern SMT reflow processes.

IR3838MTRPBF 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:: 10A

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)

IR3838MTRPBF FAQ

1.How can I place an order for IR3838MTRPBF through Aetrix?

Please submit a Request for Quotation (RFQ) for IR3838MTRPBF 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 IR3838MTRPBF reliable?

The price and inventory of IR3838MTRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IR3838MTRPBF is usually 5 days.

3.What payment methods are accepted for IR3838MTRPBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IR3838MTRPBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IR3838MTRPBF?

IR3838MTRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IR3838MTRPBF 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 IR3838MTRPBF?

For technical support, including IR3838MTRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IR3838MTRPBF requirements.

6.How does Aetrix verify that IR3838MTRPBF is sourced from the original manufacturer or authorized distributors?

All IR3838MTRPBF 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 IR3838MTRPBF meets industry standards.

7.What is the process for return or replacement of IR3838MTRPBF?

All IR3838MTRPBF units undergo pre-shipment inspection (PSI). If there is an issue with IR3838MTRPBF, 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 IR3838MTRPBF part is unused and in its original packaging.

Return procedure for IR3838MTRPBF:

1.Submit a request within 90 days.

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

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