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

Infineon Technologies IR3828MTRPBF

Name: IR3828MTRPBF
Brand: Infineon Technologies
SKU: IR3828MTRPBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IR3828MTRPBF

Manufacturer:: Infineon Technologies

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: -

Datasheet:: IR3828MTRPBF.pdf

Description:: IC REG BUCK CTRLR PQFN

Quantity:: RFQ Add To RFQ list

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Inventory:1,249

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Product details

Overview

IR3828MTRPBF from Infineon Technologies is a 10A synchronous buck regulator with integrated high- and low-side MOSFETs, PWM controller, bootstrap diode, and LDO. It operates from 1.0V–21V input, delivers 0.6V–0.86×Vin output, supports 300kHz–1.5MHz programmable switching frequency, and features thermally compensated over-current protection with three selectable trip points. Used in server point-of-load power rails.

For engineers reviewing the IR3828MTRPBF datasheet, IR3828MTRPBF pinout, IR3828MTRPBF application, or IR3828MTRPBF equivalent, key selection criteria include its PQFN 4mm×5mm package, monotonic start-up, precision 0.6V±0.6% reference, pre-bias start-up capability, and integrated drivers eliminating external gate drive components.

Technical Context

The IR3828 implements a voltage-mode PWM control architecture with feed-forward line regulation and internal digital soft-start. Its error amplifier uses Fb as inverting input and Comp as compensation node, enabling stable loop design across wide load and line variations.

Switching operation relies on bootstrapped high-side drive (Boot–SW capacitor), separate power ground (PGnd) for MOSFET drivers, and Vsns-based over-voltage monitoring. ILIM pin selects current limit thresholds via floating/Vcc/PGnd connection, while PGood provides open-drain power-good signaling with external pull-up.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Current	10A continuous - supports high-density server and telecom POL rails without external current sharing.
Input Voltage Range	1.0V to 21V - enables single-rail operation from 5V/12V/19V inputs and compatibility with intermediate bus architectures.
Output Voltage Range	0.6V to 0.86×Vin - allows precise core voltage scaling for CPUs/FPGAs while maintaining regulation margin at light loads.
Switching Frequency	300kHz to 1.5MHz - permits optimization of inductor size vs. efficiency trade-off; 600kHz typical for 12V→1.0V conversion.
R_DS(on) Top/Bottom	16.4mΩ / 7.3mΩ (typ) - reduces conduction loss and thermal stress in 10A applications at 125°C junction temperature.
Reference Accuracy	0.6V ±0.6% - ensures ±3.6mV absolute output tolerance critical for sub-1V ASIC core supplies.
Junction Temp Range	−40°C to +125°C - validated for industrial and telecom equipment operating under sustained thermal load.

Pinout & Package

PQFN 4mm × 5mm, 17-pin, exposed thermal pad (PGnd-connected), RoHS-compliant, lead-free finish.

Pin/Terminal	Circuit Role	Design Meaning
1 Fb	Inverting feedback input	Connects to resistor divider output; sets regulated V_OUT with 0.6V reference; determines closed-loop stability.
3 Comp	Error amplifier output	Interface for Type II/III compensation network; directly controls PWM duty cycle based on Fb error.
5 Rt	Frequency programming input	Resistor-to-GND sets free-running f_SW; 100kΩ yields ~600kHz, enabling EMI-aware layout tuning.
6 ILIM	Current limit select	Floating = 10A, tied to Vcc = 12A, tied to PGnd = 8A - configures OCP threshold without external sensing resistors.
7 PGood	Open-drain power-good output	Asserts high after soft-start and V_OUT within ±10%; requires external pull-up to ≤Vcc for sequencing logic.
8 Vsns	OVP and PGood sense	Monitors output rail independently of Fb; triggers fast shutdown if V_OUT exceeds 115% nominal.
9 Vin	LDO input supply	Bias source for internal 5V LDO; must be decoupled with 1.0µF ceramic; shorted to Vcc when external bias used.
10 Vcc/LDO_Out	LDO output / external bias input	Supplies internal circuitry; accepts 4.5–7.5V external rail to bypass LDO and improve efficiency at low PVin.
11 PGnd	Power ground return	Dedicated low-impedance path for high-current MOSFET drivers; must connect to system power plane, not signal GND.
12 SW	Switch node	Drives external inductor; experiences full PVin–V_OUT swing; requires tight layout with minimal loop area.
13 PVin	Main power stage input	High-current input for MOSFET bridge; rated up to 21V DC; requires bulk and high-frequency input capacitance.
14 Boot	High-side gate driver supply	Charged via 100nF capacitor to SW; sustains top-FET gate drive during 100% duty cycle; max 33V rating.
15 Enable	UVLO-capable enable input	Active-high; resistor divider from PVin enables input undervoltage lockout; threshold ≈1.2V.

Key Features

Feature	Design Value
Integrated MOSFET drivers + bootstrap diode	Eliminates need for external gate drivers and discrete bootstrap diodes, reducing BOM count and PCB footprint by ≥4 components.
Thermally compensated over-current protection	Adjusts current limit threshold with junction temperature to maintain consistent fault response across −40°C to +125°C ambient.
Enhanced pre-bias start-up	Allows safe turn-on into pre-charged output capacitors without reverse current flow or output voltage overshoot.
Monotonic start-up	Guarantees output voltage ramps only upward during soft-start, preventing glitches in downstream logic powered from same rail.
Programmable power-good output	Configurable delay and accuracy via external RC on Vsns; supports multi-rail sequencing in complex systems.

Applications

Server CPU Core Supply

Telecom Baseband Processor Rail

Use Scenario: Delivering 0.85V/8A to dual-core Xeon processor in 1U rack server with strict ripple and transient response requirements.

IC Role / Device Role / Timing Role: Primary point-of-load regulator managing dynamic load steps up to 4A/µs; regulates via voltage-mode PWM with feed-forward compensation.

Use Value: Integrated 16.4mΩ/7.3mΩ MOSFETs achieve >90% efficiency at 12V input, minimizing thermal load in constrained airflow environments.

Use Scenario: Powering 1.2V/6A FPGA fabric in LTE baseband unit requiring clean, low-noise supply with sequencing coordination.

IC Role / Device Role / Timing Role: Secondary POL regulator synchronized to system clock; PGood output triggers FPGA configuration after stable V_OUT.

Use Value: Monotonic start-up and pre-bias capability prevent configuration failure when hot-plugging daughterboards with charged outputs.

Enterprise SSD Controller Rail

Network Switch ASIC Core Supply

Use Scenario: Generating 0.9V/5A for NVMe SSD controller IC with tight ±2% output tolerance and <10mV p-p ripple.

IC Role / Device Role / Timing Role: High-accuracy buck converter using 0.6V±0.6% internal reference and Fb divider; Comp pin enables custom loop compensation.

Use Value: Precision reference and feed-forward line regulation ensure output stays within spec across 5V–19V intermediate bus variation.

Use Scenario: Supplying 0.75V/10A to 10G Ethernet switch ASIC with rapid load transients from packet buffering activity.

IC Role / Device Role / Timing Role: High-current POL regulator with 300kHz–1.5MHz f_SW programmability; ILIM pin set to 12A for transient headroom.

Use Value: Three selectable current limits allow over-current response tuning without redesigning current-sense circuitry.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MP8765GQ-Z (Monolithic Power)	6A rated, smaller 3mm×3mm QFN, no integrated bootstrap diode, requires external bootstrap cap routing.	Lower current capacity; lacks pre-bias start-up and monotonic ramp; suitable for cost-sensitive mid-range networking.	Select when board space is critical and full 10A capability is unnecessary; verify external bootstrap implementation.
TPS546D24RUKR (TI)	10A, PMBus-enabled, 4mm×4mm QFN, supports digital telemetry and adaptive voltage scaling.	Requires I²C interface and firmware integration; adds telemetry but increases system complexity.	Select when remote monitoring, dynamic voltage scaling, or multi-rail coordination via PMBus is required.

Compared with MP8765GQ-Z and TPS546D24RUKR, the IR3828MTRPBF offers higher integration (integrated bootstrap diode, LDO, drivers), simpler analog configuration, and proven robustness in high-reliability server/telecom deployments without digital overhead.

Availability

IR3828MTRPBF is available at Aetrix Electronics and suitable for server power delivery, telecom baseband processing, and enterprise storage applications requiring stable component supply, long-term lifecycle support, and qualified automotive-grade reliability screening.

Supply support for IR3828MTRPBF 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 electronics, and industrial control ICs, with global manufacturing and quality certification to ISO/TS 16949 and IECQ QC 080000.

The SupIRBuck® product line targets high-efficiency, high-density DC/DC conversion for datacenter, networking, and communications infrastructure, emphasizing integration, thermal performance, and system-level protection.

FAQ

What is the minimum input voltage required for reliable operation of IR3828MTRPBF?

The IR3828MTRPBF supports a minimum PVin of 1.0V when externally biased via Vcc/LDO_Out, but for self-biased operation using the internal LDO, Vin must be ≥5V per datasheet Section 5.2. Below 5V, the internal LDO enters dropout, degrading regulation accuracy and current capability. At 1.0V–4.9V, an external 4.5–7.5V bias must be applied to Vcc/LDO_Out, and Vin must be shorted to that rail.

How does the ILIM pin configure the over-current protection threshold?

The ILIM pin selects one of three fixed current-limit thresholds: floating = 10A, connected to Vcc = 12A, connected to PGnd = 8A. This is implemented via internal resistor ladder and comparator circuitry-no external sensing resistor is needed. The setting affects both hiccup-mode OCP response time and peak current during startup and load transients.

Can IR3828MTRPBF operate with a pre-charged output capacitor?

Yes-the IR3828MTRPBF features enhanced pre-bias start-up that safely enables the regulator into an already charged output rail. During enable, it monitors Vsns and delays high-side FET turn-on until the output voltage falls below the target, preventing reverse current flow and avoiding output voltage collapse or overshoot.

What is the recommended layout practice for the PGnd and Gnd pins?

PGnd (Pin 11) must be connected directly to the main power ground plane with low-inductance, wide copper pour, separate from signal Gnd (Pins 4 and 17). Signal Gnd serves only the control circuitry and reference; mixing PGnd and Gnd paths causes noise coupling into the error amplifier and instability. A dedicated thermal pad under the package should also connect to PGnd.

IR3828MTRPBF Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

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Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

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IR3828MTRPBF FAQ

1.How can I place an order for IR3828MTRPBF through Aetrix?

Please submit a Request for Quotation (RFQ) for IR3828MTRPBF 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 IR3828MTRPBF reliable?

The price and inventory of IR3828MTRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IR3828MTRPBF is usually 5 days.

3.What payment methods are accepted for IR3828MTRPBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IR3828MTRPBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IR3828MTRPBF?

IR3828MTRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IR3828MTRPBF 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 IR3828MTRPBF?

For technical support, including IR3828MTRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IR3828MTRPBF requirements.

6.How does Aetrix verify that IR3828MTRPBF is sourced from the original manufacturer or authorized distributors?

All IR3828MTRPBF 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 IR3828MTRPBF meets industry standards.

7.What is the process for return or replacement of IR3828MTRPBF?

All IR3828MTRPBF units undergo pre-shipment inspection (PSI). If there is an issue with IR3828MTRPBF, 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 IR3828MTRPBF part is unused and in its original packaging.

Return procedure for IR3828MTRPBF:

1.Submit a request within 90 days.

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

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