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

Infineon Technologies IR3824MTRPBF

Name: IR3824MTRPBF
Brand: Infineon Technologies
SKU: IR3824MTRPBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IR3824MTRPBF

Manufacturer:: Infineon Technologies

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: -

Datasheet:: IR3824MTRPBF.pdf

Description:: IC REG BUCK CTRLR PQFN

Quantity:: RFQ Add To RFQ list

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Inventory:4,206

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Product details

Overview

IR3824MTRPBF from Infineon Technologies is a 15A 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 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 IR3824MTRPBF datasheet, IR3824MTRPBF pinout, IR3824MTRPBF application, or IR3824MTRPBF equivalent, key selection factors include its integrated power stage (R_DS(on) top = 8.4 mΩ typ, bottom = 3.8 mΩ typ), monotonic pre-bias start-up, programmable PGood threshold, and PQFN 5 mm × 6 mm thermal performance (θ_J–PCB = 2°C/W).

Technical Context

The IR3824 implements a voltage-mode PWM control architecture with feed-forward line regulation and internal digital soft-start. Its error amplifier uses Fb and Comp pins for external loop compensation, while Rt sets switching frequency via resistor-to-ground.

Protection logic includes thermally compensated current limiting (via ILIM pin configuration), over-voltage detection (Vsns), and thermal shutdown. The device supports dual biasing: internal LDO (Vcc/LDO_Out) or external 4.5V–7.5V supply, with Vin and PVin electrically separated for optimal noise isolation.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Current	15 A continuous - supports high-density server and telecom POL rails without external MOSFETs
Input Voltage Range	1.0 V to 21 V - enables single-rail operation from 12 V or 5 V bus, or wide-range industrial inputs
Output Voltage Range	0.6 V to 0.86×Vin - supports sub-1 V core supplies (e.g., 0.85 V @ 12 V input) with ±0.6% reference accuracy
Switching Frequency	0.3 MHz to 1.5 MHz - adjustable via Rt resistor; higher frequencies reduce inductor size but increase switching loss
R_DS(on) Top / Bottom	8.4 mΩ / 3.8 mΩ typ @ 25°C - defines conduction loss at 15 A; bottom FET lower R_DS(on) improves light-load efficiency
Thermal Resistance θ_J–PCB	2 °C/W - enables high-power dissipation with minimal PCB copper area; requires direct thermal pad connection to ground plane
Operating Junction Temp	−40°C to +125°C - validated for sustained operation in enclosed telecom chassis and enterprise storage enclosures

Pinout & Package

PQFN 5 mm × 6 mm, 17-pin package with exposed thermal pad (Pin 11 = PGnd). Requires solder paste stencil design for thermal pad reflow and strict adherence to NC pin floating (Pins 2 & 16).

Pin/Terminal	Circuit Role	Design Meaning
1 Fb	Inverting feedback input	Connects to output via resistor divider; sets regulated V_OUT with 0.6 V reference; critical for loop stability
3 Comp	Error amplifier output	Interface for external RC compensation network between Comp and Fb; determines phase margin and transient response
5 Rt	Frequency set input	Resistor-to-GND sets f_SW; 100 kΩ → ~600 kHz, 30 kΩ → ~1.5 MHz; tolerance directly impacts timing accuracy
6 ILIM	Current limit select	Floating = 15 A, tied to Vcc = 12 A, tied to PGnd = 9 A; enables scalable fault current protection per rail
7 PGood	Open-drain power-good indicator	Asserts after soft-start and V_OUT within ±5%; requires external pull-up to ≤Vcc; used for sequencing in multi-rail systems
10 Vcc/LDO_Out	Bias supply I/O	Supplies internal circuitry; can be driven externally (4.5–7.5 V) to bypass internal LDO when PVin < 7.5 V
12 SW	Power switch node	Connects to output inductor; carries high di/dt; requires tight layout and Kelvin sensing for accurate OVP
14 Boot	High-side gate driver supply	100 nF capacitor to SW provides floating bias for top FET gate drive; critical for reliable high-side turn-on
15 Enable	Logic-level on/off control	Active-high; UVLO implemented via resistor divider from PVin; enables system-level power sequencing
11 PGnd	Power ground return	Dedicated ground for MOSFET drivers; must be routed separately from signal GND to minimize noise coupling into control loop

Key Features

Feature	Design Value
Integrated Power Stage	Eliminates 4 external MOSFETs and gate drivers; reduces BOM count and layout area by >35% vs discrete buck solutions
Monotonic Pre-Bias Start-Up	Enables safe ramp-up into pre-charged outputs (e.g., FPGA cores); prevents reverse current flow during power-on
Three-Setting Over-Current Protection	Configurable trip thresholds (9/12/15 A) allow matching fault tolerance to downstream load requirements without redesign
Enhanced Line Regulation	Feed-forward compensation maintains ±0.5% output regulation across full 1.0–21 V input range, reducing need for post-regulation
Programmable Power Good	Adjustable delay and threshold via external RC on PGood enable precise rail sequencing in multi-voltage systems (e.g., CPU + memory)

Applications

Server Point-of-Load

Telecom Base Station RF Cards

Use Scenario: Delivering 0.85 V @ 12 A to ASICs in 1U rack servers with constrained airflow and high ambient temperature.

IC Role / Device Role / Timing Role: Primary POL regulator managing dynamic load transients up to 4 A/µs; provides stable core voltage under burst-mode CPU workloads.

Use Value: Integrated MOSFETs and 2°C/W θ_J–PCB enable 89% peak efficiency at 12 V_IN/1.0 V_OUT, reducing thermal stress on adjacent components.

Use Scenario: Powering GaN PA bias rails and FPGA I/O banks in outdoor macro base stations operating at −40°C to +85°C ambient.

IC Role / Device Role / Timing Role: Dual-function regulator supplying both analog bias (1.8 V) and digital core (0.95 V) with independent sequencing via PGood and Enable.

Use Value: Pre-bias start-up and −40°C to +125°C junction rating ensure reliable cold-start in unheated enclosures without derating.

Enterprise Storage Backplanes

Network Switch Line Cards

Use Scenario: Generating 1.2 V @ 10 A for NVMe SSD controllers on high-density backplanes with shared 12 V distribution.

IC Role / Device Role / Timing Role: High-efficiency POL converter with fast transient response; monitors input UVLO via Enable divider to prevent brownout-induced data corruption.

Use Value: 0.3–1.5 MHz frequency programming allows optimizing for EMI compliance (e.g., 850 kHz avoids AM band) while maintaining 87% efficiency at full load.

Use Scenario: Supplying 1.0 V @ 15 A to multi-core network processors in modular line cards with strict board space limits.

IC Role / Device Role / Timing Role: Single-chip solution replacing controller + dual MOSFETs + drivers; supports daisy-chained PGood for hot-swap sequencing.

Use Value: Three ILIM settings allow tuning fault current to match processor TDP profiles-e.g., 12 A for idle, 15 A for turbo burst-reducing false trips.

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 (Monolithic Power)	3A max output, no integrated high-side FET; requires external MOSFETs and bootstrap cap	Limited to low-power applications (<5 W); lacks pre-bias start-up and programmable PGood	Only suitable for cost-sensitive, low-current auxiliary rails where integration is secondary
TPS546D24RQFPR (Texas Instruments)	15A, PMBus-enabled, 4-mm × 3-mm QFN; supports digital telemetry and adaptive voltage scaling	Requires firmware integration and PMBus host; higher BOM cost and design complexity	Preferred for systems needing real-time telemetry, dynamic voltage scaling, or multi-phase coordination

Compared with MP2451DT-LF-Z and TPS546D24RQFPR, the IR3824MTRPBF offers the optimal balance of integration, thermal performance, and analog configurability-enabling rapid deployment in high-current analog POL designs without digital infrastructure overhead.

Availability

IR3824MTRPBF is available at Aetrix Electronics and suitable for server power delivery, telecom base station POL, and enterprise storage backplane applications requiring stable component supply and long-term industrial lifecycle support.

Supply support for IR3824MTRPBF 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 SiC power devices.

The SupIRBuck® product line delivers highly integrated DC/DC regulators targeting high-efficiency, space-constrained point-of-load applications in datacenter, telecom, and networking infrastructure.

FAQ

What is the minimum input voltage required for reliable operation with internal LDO biasing?

The IR3824MTRPBF requires ≥7.5 V on Vin to maintain internal LDO regulation. Below this, the LDO enters dropout mode, increasing quiescent current and potentially degrading reference accuracy. For inputs <7.5 V, connect an external 4.5–7.5 V supply to Vcc/LDO_Out and short Vin to that node per datasheet Section 5.2 Note 6.

How does the ILIM pin configuration affect over-current response time?

ILIM pin state selects the current-limit threshold (9/12/15 A) but does not alter response latency-the thermally compensated current limit triggers within 200 ns regardless of setting. Response time is fixed by internal comparator propagation delay and is independent of trip level selection.

Can the IR3824MTRPBF safely start into a pre-biased output without external circuitry?

Yes. The IR3824MTRPBF implements monotonic pre-bias start-up: it holds the high-side FET off until the output voltage decays below the target setpoint, then ramps up using controlled gate drive. No external diodes, resistors, or controllers are needed to prevent reverse current or output overshoot.

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

PGnd (Pin 11) must be connected directly to the power ground plane under the thermal pad with multiple vias; Gnd (Pins 4 & 17) should route separately to the signal ground plane. A split ground plane with a single bridge near the IC ensures low-noise reference while containing high di/dt return currents away from sensitive analog nodes.

IR3824MTRPBF Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: -

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

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Output Configuration:: -

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Voltage - Input (Min):: -

Voltage - Input (Max):: -

Voltage - Output (Min/Fixed):: -

Voltage - Output (Max):: -

Current - Output:: -

Frequency - Switching:: -

Synchronous Rectifier:: -

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IR3824MTRPBF FAQ

1.How can I place an order for IR3824MTRPBF through Aetrix?

Please submit a Request for Quotation (RFQ) for IR3824MTRPBF 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 IR3824MTRPBF reliable?

The price and inventory of IR3824MTRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IR3824MTRPBF is usually 5 days.

3.What payment methods are accepted for IR3824MTRPBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IR3824MTRPBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IR3824MTRPBF?

IR3824MTRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IR3824MTRPBF 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 IR3824MTRPBF?

For technical support, including IR3824MTRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IR3824MTRPBF requirements.

6.How does Aetrix verify that IR3824MTRPBF is sourced from the original manufacturer or authorized distributors?

All IR3824MTRPBF 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 IR3824MTRPBF meets industry standards.

7.What is the process for return or replacement of IR3824MTRPBF?

All IR3824MTRPBF units undergo pre-shipment inspection (PSI). If there is an issue with IR3824MTRPBF, 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 IR3824MTRPBF part is unused and in its original packaging.

Return procedure for IR3824MTRPBF:

1.Submit a request within 90 days.

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

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