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

Infineon Technologies IR3802AMTR1PBF

Name: IR3802AMTR1PBF
Brand: Infineon Technologies
SKU: IR3802AMTR1PBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IR3802AMTR1PBF

Manufacturer:: Infineon Technologies

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 15-PowerVQFN

Datasheet:: IR3802AMTR1PBF.pdf

Description:: IC REG BUCK ADJ 6A PQFN

Quantity:: RFQ Add To RFQ list

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Inventory:2,141

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Product details

Overview

IR3802AMTR1PBF from Infineon Technologies is a highly integrated synchronous buck regulator with integrated high- and low-side MOSFETs, delivering up to 6A continuous output current, 0.6V to 12V adjustable output voltage, and fixed 300kHz switching frequency. It operates from 2.5V–21V input, features precision 0.6V reference, hiccup-mode over-current protection, and pre-bias start-up-designed for point-of-load regulation in graphics cards and embedded computing power rails.

For engineers reviewing the IR3802AMTR1PBF datasheet, IR3802AMTR1PBF pinout, IR3802AMTR1PBF application, or IR3802AMTR1PBF equivalent, key selection criteria include its thermally enhanced 5mm×6mm Power QFN package, programmable OCSet threshold, AGnd/PGnd separation for noise immunity, and VC biasing requirement above VIN+5V.

Technical Context

The IR3802AMTR1PBF implements voltage-mode PWM control with a fixed 300kHz oscillator and internal sawtooth ramp generator, eliminating external timing components. Its error amplifier compares FB voltage against a 0.6V reference, driving gate drivers via trailing-edge modulation.

Current limiting uses R_DS(on)-based sensing of the low-side MOSFET (18–23mΩ typ), enabling resistor-free protection. Under-voltage lockout monitors both VCC (4.0–4.4V turn-on) and VC (3.1–3.5V turn-on), while thermal shutdown activates at 140°C with 20°C hysteresis and auto-restart.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	2.5V to 21V - supports wide-input industrial and computing supplies including 12V and 19V rails.
Output Voltage Range	0.6V to 12V - enables core voltage regulation down to sub-1V for modern processors and FPGAs.
Continuous Output Current	6A - sustained delivery under thermal limits with external inductor and PCB copper area design.
Switching Frequency	300kHz (270–330kHz) - balances efficiency and EMI while allowing compact 2.2μH inductors.
Reference Voltage Accuracy	±2.0% (−40°C to +105°C) - ensures stable output setpoint across temperature for reliable system operation.
Thermal Shutdown Threshold	140°C with 20°C hysteresis - protects internal MOSFETs and die during overload or poor heatsinking.
Soft-Start Current	15–28μA - sets startup time via external capacitor on SS pin without requiring dedicated controller logic.

Pinout & Package

IR3802AMTR1PBF is housed in a thermally enhanced 15-pin Power QFN package measuring 5mm × 6mm, with exposed thermal pad (EP) on underside for direct PCB thermal coupling. AGnd pins (4, 5, 15) must be connected together and routed to a clean signal ground plane; PGnd (10) is isolated for power return path integrity.

Pin/Terminal	Circuit Role	Design Meaning
1, 9 NC	No-connect	Not internally bonded; must remain unconnected per datasheet.
2 FB	Inverting feedback input	Connects to output divider; regulates output by comparing against 0.6V internal reference.
3 COMP	Error amplifier output	Drives PWM comparator; external compensation network sets loop stability.
4, 5, 15 AGnd	Analog ground reference	Common return for reference, error amp, and soft-start circuitry; must tie to quiet ground plane.
6 SS/SD	Soft-start/shutdown control	Pull below 0.25V to disable; capacitor to AGnd sets ramp rate for controlled VOUT rise.
7 OCSet	Over-current threshold set	Resistor to SW pin programs current limit; enables scalable protection without sense resistor.
8 VCC	Bias supply for low-side driver	Must be ≥4.5V; requires ≥0.1μF ceramic cap to PGnd for stable gate drive.
10 PGnd	Power ground return	Isolated return path for MOSFET drivers; connects to power plane near SW and inductor.
11 SW	Switch node	Connects to inductor; carries high di/dt; requires short, low-inductance layout.
12 VIN	Main input supply	Accepts 2.5–21V; decoupling caps required close to pin for transient response.
13 HG	High-side gate driver output	Drives top MOSFET gate; requires small RC snubber to SW for ringing suppression.
14 VC	Bootstrap supply for high-side driver	Must exceed VIN by ≥5V; requires ≥0.1μF ceramic cap to PGnd for charge reservoir.

Key Features

Feature	Design Value
Integrated dual MOSFETs	18–23mΩ R_DS(on) top/bottom switches eliminate external FETs and reduce BOM count and footprint.
Pre-bias start-up	Enables safe startup into pre-charged outputs without output voltage collapse or oscillation.
Hiccup-mode over-current protection	Shuts down on fault, waits for recovery, then retries-prevents thermal runaway during sustained overload.
Separated AGnd and PGnd	Minimizes noise coupling between analog control circuitry and high-current power paths.
Programmable soft-start	Adjustable ramp time via external capacitor avoids inrush current and stabilizes multi-rail sequencing.

Applications

Graphics Card VRM

Embedded Computing PSU

Use Scenario: Regulating GPU core voltage (e.g., 0.8–1.2V @ 4–6A) on PCIe add-in cards with tight space constraints.

IC Role / Device Role / Timing Role: Primary synchronous buck controller with integrated power stages, managing transient response and thermal load.

Use Value: Eliminates discrete driver + MOSFET stage, reducing solution size by >30% while maintaining ±2% output accuracy across temperature.

Use Scenario: Providing stable 3.3V or 5V rail for ARM-based industrial controllers with variable load profiles.

IC Role / Device Role / Timing Role: Point-of-load regulator with hiccup protection and pre-bias capability for hot-swap-capable systems.

Use Value: Enables reliable cold-start into pre-charged backplane rails and survives brownout events via dual UVLO monitoring.

Desktop PC Memory Rail

Set-Top Box SoC Supply

Use Scenario: Delivering DDR4/DDR5 VDDQ (1.2V/1.1V) with fast load-step response and low ripple.

IC Role / Device Role / Timing Role: High-efficiency DC/DC converter operating at 300kHz to minimize EMI near sensitive RF sections.

Use Value: Achieves >92% peak efficiency at 6A with 2.2μH inductor, reducing heat sink requirements in dense chassis layouts.

Use Scenario: Powering video processing SoCs requiring clean 1.0V core and 1.8V I/O rails in thermally constrained enclosures.

IC Role / Device Role / Timing Role: Compact, self-contained buck regulator with thermal shutdown and programmable OCSet for field reliability.

Use Value: Prevents catastrophic failure during cable short or ESD event via automatic hiccup recovery and 140°C thermal cutoff.

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)	4A rated, 2.5–18V input, 0.6–5.5V output, 500kHz switching, no VC bootstrap pin	Lacks VC biasing architecture; unsuitable for >12V input or high-side gate drive above VIN+5V	Choose for lower-current, cost-sensitive designs where 300kHz EMI profile and VC flexibility are not required.
TPS546B24RVFT (TI)	10A rated, 3–20V input, 0.5–5.5V output, PMBus interface, 350kHz–2MHz programmable frequency	Includes digital telemetry and margining; requires external MOSFETs and more complex layout	Choose when remote monitoring, dynamic voltage scaling, or higher current headroom is needed-accepts larger footprint and BOM cost.

Compared with MP8765GQ-Z and TPS546B24RVFT, the IR3802AMTR1PBF uniquely balances 6A capability, integrated power stage, VC bootstrap support for high-VIN operation, and minimal external component count-making it optimal for space-constrained, analog-controlled PoL applications where digital interface adds no value.

Availability

IR3802AMTR1PBF is available at Aetrix Electronics and suitable for graphics card VRMs, embedded computing PSUs, and set-top box SoC supplies requiring stable component supply, RoHS-compliant packaging, and long-term production continuity.

Supply support for IR3802AMTR1PBF 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 synchronous buck regulators targeting high-density, high-efficiency point-of-load conversion for computing, consumer, and industrial applications-emphasizing thermal performance, protection robustness, and ease of implementation.

FAQ

What is the minimum recommended output capacitance for stable operation at 6A?

The IR3802AMTR1PBF requires ≥220μF total output capacitance using low-ESR ceramic or polymer capacitors, distributed near the FB and PGnd pins. Layout must minimize loop inductance between SW, PGnd, and output caps to prevent instability and overshoot during 4A/μs load transients.

Can the IR3802AMTR1PBF operate with VIN = 3.3V?

Yes-VIN can be as low as 2.5V, but output voltage must be ≤0.8×VIN per datasheet. At 3.3V input, maximum regulated output is 2.64V. Also verify VCC and VC UVLO thresholds are met: VCC ≥4.0V and VC ≥3.1V require external biasing if VIN < 4.5V.

How is the hiccup current limit threshold set?

The hiccup threshold is set by connecting a resistor between OCSet (Pin 7) and SW (Pin 11). A 10kΩ resistor yields ~20μA OCSET current, corresponding to ~6A limit with typical R_DS(on); exact value depends on MOSFET conduction resistance and temperature.

Is the thermal pad (EP) electrically connected to any internal node?

No-the exposed thermal pad is internally connected only to PGnd (Pin 10). It must be soldered to a dedicated PGnd copper pour with ≥4 thermal vias (0.3mm diameter) to inner ground layers to achieve specified θ_JA = 15°C/W and sustain 6A continuous operation.

IR3802AMTR1PBF 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:: 6A

Frequency - Switching:: 300kHz

Synchronous Rectifier:: Yes

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: PQFN (5x6)

IR3802AMTR1PBF FAQ

1.How can I place an order for IR3802AMTR1PBF through Aetrix?

Please submit a Request for Quotation (RFQ) for IR3802AMTR1PBF 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 IR3802AMTR1PBF reliable?

The price and inventory of IR3802AMTR1PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IR3802AMTR1PBF is usually 5 days.

3.What payment methods are accepted for IR3802AMTR1PBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IR3802AMTR1PBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IR3802AMTR1PBF?

IR3802AMTR1PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IR3802AMTR1PBF 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 IR3802AMTR1PBF?

For technical support, including IR3802AMTR1PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IR3802AMTR1PBF requirements.

6.How does Aetrix verify that IR3802AMTR1PBF is sourced from the original manufacturer or authorized distributors?

All IR3802AMTR1PBF 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 IR3802AMTR1PBF meets industry standards.

7.What is the process for return or replacement of IR3802AMTR1PBF?

All IR3802AMTR1PBF units undergo pre-shipment inspection (PSI). If there is an issue with IR3802AMTR1PBF, 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 IR3802AMTR1PBF part is unused and in its original packaging.

Return procedure for IR3802AMTR1PBF:

1.Submit a request within 90 days.

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

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