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

Infineon Technologies IR3820MTR1PBF

Name: IR3820MTR1PBF
Brand: Infineon Technologies
SKU: IR3820MTR1PBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IR3820MTR1PBF

Manufacturer:: Infineon Technologies

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 15-PowerVQFN

Datasheet:: IR3820MTR1PBF.pdf

Description:: IC REG BUCK ADJ 12A PQFN

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Product details

Overview

IR3820MTR1PBF from Infineon Technologies is a highly integrated synchronous buck regulator with integrated high- and low-side MOSFETs, delivering up to 12A continuous output current, 0.6V–12V adjustable output voltage, and fixed 600kHz switching frequency. It operates from 2.5V–21V input, features programmable over-current protection, pre-bias startup, and thermal shutdown-designed for DDR memory and graphics card voltage regulation.

For engineers reviewing the IR3820MTR1PBF datasheet, IR3820MTR1PBF pinout, IR3820MTR1PBF application, or IR3820MTR1PBF equivalent, key selection criteria include its 5mm×6mm Power QFN package, dual supply rails (VCC and VC), Vsns-programmable PGood threshold, hiccup-mode current limiting, and R_DS(on) of 6.9mΩ (top/bottom) at 25°C.

Technical Context

The IR3820MTR1PBF implements voltage-mode PWM control with a fixed 600kHz oscillator and internal sawtooth ramp generator. Feedback is taken via FB pin against a precision 0.6V reference, enabling accurate output regulation across temperature (±1.5% over –40°C to +105°C).

Current sensing uses R_DS(on) of the internal low-side MOSFET, eliminating external sense resistors. Protection includes non-latching thermal shutdown at 140°C (20°C hysteresis), UVLO on both VCC (4.4V turn-on) and VC (3.5V turn-on), and programmable hiccup-mode over-current response triggered by OCSet resistor.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	2.5V to 21V - supports wide-input industrial and computing power rails including 12V server distribution and 5V embedded systems.
Output Voltage Range	0.6V to 12V - covers DDR3/DDR4 core (1.2V/1.35V), GPU cores (0.8–1.1V), and peripheral I/O (3.3V/5V).
Continuous Output Current	12A - enables single-regulator point-of-load for high-performance SoCs and GPUs without parallel stages.
Switching Frequency	600kHz (±10%) - allows compact 0.6μH inductors and reduces EMI compared to lower-frequency alternatives.
Reference Voltage Accuracy	±1.5% (–40°C to +105°C) - ensures stable output under thermal stress in dense PCB layouts.
MOSFET R_DS(on)	6.9mΩ (top & bottom, 25°C) - minimizes conduction loss at full load, supporting >90% efficiency at 12A/1.2V.
Thermal Shutdown Threshold	140°C with 20°C hysteresis - provides robust fault recovery in thermally constrained modules without latch-up.

Pinout & Package

IR3820MTR1PBF is housed in a thermally enhanced 15-pin 5mm × 6mm Power QFN package with exposed thermal pad (PGnd-connected). Pin layout supports separate AGnd (signal reference) and PGnd (power return) planes to minimize noise coupling and improve stability.

Pin/Terminal	Circuit Role	Design Meaning
Vsns	Power Good sense input	Connects to external resistor divider to set PGood trip at 0.38V typical; enables precise output monitoring independent of FB loop.
FB	Error amplifier inverting input	Direct connection to output via resistor divider sets regulated voltage; referenced to internal 0.6V bandgap.
COMP	Error amplifier output	Drives PWM comparator; external compensation network (RC) connects here for loop stability tuning.
SS/SD	Soft-start / shutdown control	Capacitor-to-AGnd sets startup time; pulled below 0.3V forces immediate shutdown with gate drivers disabled.
OCSet	Over-current threshold programming	Resistor from OCSet to SW pin sets hiccup current limit; eliminates need for external current-sense resistor.
VCC	Bias supply for logic and low-side driver	Must be ≥4.5V; requires 0.1μF ceramic capacitor to PGnd for noise suppression and gate drive integrity.
VC	High-side driver bootstrap supply	Requires voltage ≥VIN+5V (up to 28V); 0.1μF ceramic cap to PGnd sustains gate charge during high-duty cycles.
PGood	Open-collector status output	Pulled low when output is within ±10% of target; requires external pull-up to VCC for system sequencing.
SW	Switch node	Connects to output inductor; carries high di/dt; must be routed with minimal loop area to reduce EMI.
HG	High-side gate driver output	Drives top MOSFET gate; small capacitor to SW forms bootstrap circuit for high-side operation.

Key Features

Feature	Design Value
Integrated dual MOSFETs	Eliminates discrete FET selection, layout complexity, and gate drive design-reduces BOM count and footprint by >40% vs controller+discrete solution.
Pre-bias startup capability	Enables safe start into pre-charged outputs (e.g., hot-plug DDR modules), preventing reverse current flow and output collapse.
Programmable hiccup over-current protection	Auto-retry behavior limits fault energy and prevents thermal runaway during short-circuit or overload events without requiring system reset.
Separate AGnd and PGnd pins	Isolates sensitive analog feedback paths from high-current power ground returns-improves PSRR and reduces output voltage ripple.
Thermally enhanced Power QFN	Exposed thermal pad soldered to PCB copper pour achieves θ_JA ≈ 35°C/W-enables 12A operation without heatsink in 4-layer boards.

Applications

DDR Memory Regulation

Graphics Card Core Supply

Use Scenario: Regulating 1.2V/1.35V DDR3/DDR4 VDDQ or VDDIO rails in servers and workstations with tight transient response requirements.

IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering tightly regulated, low-noise DC power directly to memory ICs.

Use Value: Pre-bias startup avoids bus contention during memory module insertion; 0.6V reference accuracy ensures JEDEC-compliant voltage tolerance.

Use Scenario: Providing dynamic core voltage (0.8–1.1V) to GPU ASICs in gaming PCs and AI accelerators with rapid load steps up to 10A/μs.

IC Role / Device Role / Timing Role: High-current POL regulator with fast transient response enabled by voltage-mode control and low R_DS(on).

Use Value: 600kHz switching and integrated FETs reduce output capacitance needs by 30% vs 300kHz controllers, saving board space.

Server Point-of-Load

Embedded System CPU Core Supply

Use Scenario: Distributed 1.8V or 3.3V regulation for ASICs, FPGAs, or PCIe switches in 1U rack-mounted servers with strict thermal budgets.

IC Role / Device Role / Timing Role: Standalone buck converter replacing multi-chip solutions in space-constrained VRMs.

Use Value: 5mm×6mm QFN package fits between BGA pads; thermal pad enables direct heat transfer to inner ground plane.

Use Scenario: Powering ARM-based SoC cores (e.g., NXP i.MX8, TI Sitara) in industrial HMIs and edge gateways requiring reliable cold-start operation.

IC Role / Device Role / Timing Role: Main processor core supply with programmable soft-start and UVLO for robust boot sequencing.

Use Value: Dual UVLO (VCC and VC) prevents partial operation; hiccup mode maintains system visibility during faults.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MP2315DJ-LF-Z	6A rated, 2.5–36V input, no VC rail, single bias supply	Lacks dual-supply architecture and hiccup-mode OCP; limited to ≤6A loads	Choose for cost-sensitive, lower-current designs where thermal headroom is ample and VC bootstrap complexity is undesirable.
TPS544B20RJER	15A rated, 4.5–18V input, PMBus interface, digital control	Includes telemetry, margining, and fault logging-adds firmware overhead and layout complexity	Choose when system-level monitoring, dynamic voltage scaling, or compliance with PMBus standards is required.

Compared with MP2315DJ-LF-Z and TPS544B20RJER, the IR3820MTR1PBF delivers optimal balance of integration, thermal performance, and analog simplicity for 12A analog POLs-offering higher current density than the MP2315 and lower design overhead than the TPS544B20's digital stack.

Availability

IR3820MTR1PBF is available at Aetrix Electronics and suitable for DDR memory regulation, graphics card core supplies, and server point-of-load applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for IR3820MTR1PBF 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 silicon carbide power devices.

The IR3820 belongs to Infineon's SupIRBuck™ family-engineered for high-efficiency, space-constrained DC/DC conversion in computing and communications infrastructure where integration, thermal performance, and reliability are critical.

FAQ

What is the minimum recommended output capacitance for stable 12A operation?

For 12A operation at 600kHz, Infineon recommends ≥600μF total output capacitance using low-ESR polymer or MLCC+electrolytic combinations. Layout must minimize loop inductance, and the thermal pad must be fully soldered to a ≥4cm² internal ground plane to maintain <15°C junction rise at full load.

Can IR3820MTR1PBF operate with only VCC powered and VC floating?

No. VC must be supplied at ≥VIN+5V (minimum 3.5V) for high-side gate drive. If VC is unpowered or below UVLO threshold (2.85V), the high-side MOSFET remains off and the device cannot regulate-output collapses regardless of VCC status. Both supplies are mandatory for operation.

How is the over-current threshold calculated from the OCSet resistor value?

The OCSet pin draws 20μA (typical) when active. With OCSet tied to SW through resistor R_OC, current limit I_LIM = 0.02 × R_OC (in ohms). For example, R_OC = 100kΩ yields ~2A limit; R_OC = 600kΩ yields ~12A. Full equation and derating curves are in Section 6 of PD-60329.

Does the IR3820MTR1PBF support forced PWM or power-save mode?

No. The IR3820MTR1PBF operates exclusively in fixed-frequency voltage-mode PWM. It does not feature pulse-skipping, diode emulation, or discontinuous conduction mode-ensuring predictable EMI profile and consistent transient response across all load conditions from 0A to 12A.

IR3820MTR1PBF Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: SupIRBuck®

Package/Case:: 15-PowerVQFN

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):: 2.5V

Voltage - Input (Max):: 21V

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

Voltage - Output (Max):: 12V

Current - Output:: 12A

Frequency - Switching:: 600kHz

Synchronous Rectifier:: Yes

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: PQFN (5x6)

IR3820MTR1PBF FAQ

1.How can I place an order for IR3820MTR1PBF through Aetrix?

Please submit a Request for Quotation (RFQ) for IR3820MTR1PBF 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 IR3820MTR1PBF reliable?

The price and inventory of IR3820MTR1PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IR3820MTR1PBF is usually 5 days.

3.What payment methods are accepted for IR3820MTR1PBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IR3820MTR1PBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IR3820MTR1PBF?

IR3820MTR1PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IR3820MTR1PBF 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 IR3820MTR1PBF?

For technical support, including IR3820MTR1PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IR3820MTR1PBF requirements.

6.How does Aetrix verify that IR3820MTR1PBF is sourced from the original manufacturer or authorized distributors?

All IR3820MTR1PBF 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 IR3820MTR1PBF meets industry standards.

7.What is the process for return or replacement of IR3820MTR1PBF?

All IR3820MTR1PBF units undergo pre-shipment inspection (PSI). If there is an issue with IR3820MTR1PBF, 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 IR3820MTR1PBF part is unused and in its original packaging.

Return procedure for IR3820MTR1PBF:

1.Submit a request within 90 days.

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

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