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

Infineon Technologies IR3800AMTRPBF

Name: IR3800AMTRPBF
Brand: Infineon Technologies
SKU: IR3800AMTRPBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IR3800AMTRPBF

Manufacturer:: Infineon Technologies

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 15-PowerVQFN

Datasheet:: IR3800AMTRPBF.pdf

Description:: IC REG BUCK ADJ 14A PQFN

Quantity:: RFQ Add To RFQ list

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Inventory:2,347

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Product details

Overview

IR3800AMTRPBF from Infineon Technologies is a highly integrated synchronous buck regulator with integrated high- and low-side MOSFETs, delivering up to 14A continuous output current, operating at a fixed 300kHz switching frequency, supporting 2.5V–21V input and 0.6V–12V adjustable output voltage, and featuring programmable over-current protection - used in graphics card VRMs and embedded point-of-load systems.

For engineers reviewing the IR3800AMTRPBF datasheet, IR3800AMTRPBF pinout, IR3800AMTRPBF application, or IR3800AMTRPBF equivalent, key selection criteria include its thermally enhanced 5mm×6mm Power QFN package, pre-bias start-up capability, hiccup-mode current limiting, precision 0.6V reference, and dual UVLO thresholds for VCC and VC supplies.

Technical Context

The IR3800AMTRPBF 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 sensing uses R_DS(on) of the internal low-side MOSFET (6.9–8.7mΩ typ), enabling resistorless over-current protection set via OCSet pin. Dual independent UVLO circuits monitor VCC (4.0–4.4V turn-on) and VC (3.1–3.5V turn-on) to ensure safe driver biasing before regulation begins.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	2.5V to 21V - supports wide-input industrial and computing rails including 12V and 19V adapters.
Output Voltage Range	0.6V to 12V - enables core voltage regulation for CPUs, GPUs, and FPGAs down to sub-1V logic domains.
Continuous Output Current	14A - delivers full rated load without external current-sense resistors or heatsink augmentation.
Switching Frequency	300kHz (270–330kHz) - balances efficiency and EMI while allowing compact 1µH inductors and ceramic output capacitors.
Reference Voltage Accuracy	±2.0% (–40°C to +105°C) - ensures stable output under thermal stress in desktop PCs and game consoles.
Thermal Shutdown Threshold	140°C with 20°C hysteresis - provides self-recovery protection during sustained overload or airflow loss.
Soft-Start Current	15–28µA - sets startup time via external capacitor; enables controlled inrush management in multi-rail systems.

Pinout & Package

IR3800AMTRPBF is housed in a thermally enhanced 5mm × 6mm Power QFN package with exposed thermal pad (pin 15 AGnd tied to thermal slug), optimized for PCB copper pour heat dissipation in high-density VRM layouts.

Pin/Terminal	Circuit Role	Design Meaning
1, 9 NC	No-connect terminal	Must remain unconnected; no internal function or routing.
2 FB	Inverting error amplifier input	Connects to output via resistor divider to set regulated voltage using 0.6V internal reference.
3 COMP	Error amplifier output	Drives PWM comparator; external compensation network connects here for loop stability.
4, 5, 15 AGnd	Signal ground reference	Must be connected together and routed separately from PGnd to minimize noise coupling into feedback path.
6 SS/SD	Soft-start / shutdown control	Pull below 0.3V to disable regulator; capacitor to AGnd sets monotonic output ramp time.
7 OCSet	Over-current threshold programming	Resistor from OCSet to SW sets current limit; enables precise trip point without sense resistor.
8 VCC	Bias supply for low-side driver & logic	Requires ≥0.1µF high-frequency ceramic cap to PGnd; UVLO triggers if <4.0V.
10 PGnd	Power ground return	Separate ground plane for MOSFET drivers; must connect directly to power inductor and output capacitor negative.
11 SW	Switch node	Connects to inductor; carries high di/dt; requires tight layout to minimize ringing and EMI.
12 VIN	Main input supply	Accepts 2.5–21V; feeds high-side gate driver via VC bootstrap path and internal LDO for VCC.
13 HG	High-side gate driver output	Drives top MOSFET gate; requires small RC snubber to SW to suppress gate oscillation.
14 VC	High-side driver bootstrap supply	Must be >VIN+5V (up to 28V); requires ≥0.1µF ceramic cap to PGnd; UVLO triggers if <3.1V.

Key Features

Feature	Design Value
Integrated dual MOSFETs	Eliminates external discrete switches and reduces BOM count by 4–6 components in typical 14A POL designs.
Pre-bias start-up	Enables safe startup into pre-charged outputs (e.g., hot-swap or multi-phase sequencing), avoiding reverse current or output collapse.
Hiccup-mode over-current protection	Enters auto-retry shutdown on fault, limiting average power dissipation and preventing thermal runaway during short-circuit events.
Independent VCC and VC UVLO	Ensures both driver stages are fully biased before enabling switching - prevents shoot-through and gate drive failure during brown-out.
Thermally enhanced Power QFN	Exposed thermal pad and optimized die attach enable 14A operation with ≤3.7W total power loss at 12V_IN/1.8V_OUT.

Applications

Graphics Card VRM

Desktop PC Core Regulator

Use Scenario: Delivering stable 0.8–1.3V at up to 14A to GPU cores under dynamic load transients.

IC Role / Device Role / Timing Role: Primary synchronous buck controller with integrated power stage, managing phase alignment and current sharing in multi-phase configurations.

Use Value: Enables compact, high-efficiency single-phase implementation for mid-tier GPUs without external drivers or sense resistors.

Use Scenario: Regulating CPU V_DD rail in ATX-based motherboards with strict ±3% tolerance and fast transient response.

IC Role / Device Role / Timing Role: Point-of-load regulator with programmable soft-start and power-good signaling for system sequencing.

Use Value: Meets Intel VRD specifications for startup timing and output accuracy while reducing layout area by 35% vs. discrete solutions.

Game Console SoC Supply

Embedded FPGA I/O Bank Regulator

Use Scenario: Powering application processor and memory subsystems in compact, thermally constrained gaming hardware.

IC Role / Device Role / Timing Role: Main SoC core supply with pre-bias start-up to support hot-plug firmware updates and multi-rail coordination.

Use Value: Prevents output voltage disturbance during firmware reflash when other rails remain active, ensuring system-level reliability.

Use Scenario: Generating configurable 1.2–3.3V I/O voltages for Xilinx/Intel FPGAs in industrial control modules.

IC Role / Device Role / Timing Role: Programmable POL regulator with adjustable OC threshold and thermal shutdown for field-deployed reconfigurable logic.

Use Value: Supports multiple I/O standards from one BOM variant, reducing inventory while maintaining safety-critical thermal protection.

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)	Fixed 500kHz frequency; 12A rating; requires external bootstrap capacitor; no VC UVLO monitoring.	Lacks independent VC supply monitoring and hiccup-mode recovery - less robust in unstable adapter environments.	Select when higher switching frequency allows smaller magnetics and board space is more constrained than thermal margin.
TPS546B24RVFR (Texas Instruments)	40A rating; PMBus interface; digital control loop; 3.3V–18V input; requires external MOSFETs.	Supports telemetry and dynamic voltage scaling but adds complexity and cost for non-PMBus systems.	Select when system-level telemetry, adaptive voltage scaling, or >14A scalability are required - not a drop-in replacement.

Compared with MP8765GQ-Z and TPS546B24RVFR, the IR3800AMTRPBF offers optimal balance of integration, thermal resilience, and analog simplicity for fixed-frequency 14A POLs where digital control or ultra-high density are not mandatory.

Availability

IR3800AMTRPBF is available at Aetrix Electronics and suitable for graphics card VRMs, desktop PC core regulators, and embedded FPGA I/O bank supplies requiring stable component supply across long-lifecycle industrial and consumer programs.

Supply support for IR3800AMTRPBF 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 leader specializing in power management, automotive ICs, and industrial control solutions, with global manufacturing and quality certification to ISO/TS 16949 and IATF 16949.

The SupIRBuck™ product line delivers fully integrated DC/DC regulators targeting space-constrained, high-current point-of-load applications in computing, gaming, and embedded systems - emphasizing thermal performance, ease of use, and minimal external component count.

FAQ

What is the minimum recommended output capacitance for stable 14A operation?

The IR3800AMTRPBF requires ≥330µF total ceramic output capacitance (e.g., twelve 22µF/6.3V X5R 0805s) to meet transient response and ripple specs under 14A load steps. Layout must minimize ESL via parallel capacitor placement near PGnd/VIN pins and direct connection to the inductor's SW node.

Can IR3800AMTRPBF operate with input voltage below 4.5V?

Yes - the device supports 2.5V–21V input per absolute maximum ratings and functional specs, but VCC UVLO (4.0V turn-on) and VC UVLO (3.1V turn-on) require auxiliary biasing below ~4.5V input. A dedicated LDO or charge pump is needed to maintain driver functionality at VIN < 4.5V.

How is thermal performance verified in production?

Thermal shutdown threshold (140°C) and hysteresis (20°C) are design-guaranteed per characterization data (PD-60353, Note3) and validated through accelerated life testing and thermal imaging on representative production lots - not 100% tested per unit but statistically assured per AEC-Q100-compliant process controls.

Is AGnd and PGnd separation mandatory in layout?

Yes - AGnd (pins 4, 5, 15) must form a quiet signal ground island isolated from PGnd (pin 10) except at a single-point star connection near the input capacitor. Mixing grounds degrades reference stability and causes 5–10% output voltage error due to PGnd noise coupling into the 0.6V feedback path.

IR3800AMTRPBF 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:: 14A

Frequency - Switching:: 300kHz

Synchronous Rectifier:: Yes

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: PQFN (5x6)

IR3800AMTRPBF FAQ

1.How can I place an order for IR3800AMTRPBF through Aetrix?

Please submit a Request for Quotation (RFQ) for IR3800AMTRPBF 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 IR3800AMTRPBF reliable?

The price and inventory of IR3800AMTRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IR3800AMTRPBF is usually 5 days.

3.What payment methods are accepted for IR3800AMTRPBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IR3800AMTRPBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IR3800AMTRPBF?

IR3800AMTRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IR3800AMTRPBF 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 IR3800AMTRPBF?

For technical support, including IR3800AMTRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IR3800AMTRPBF requirements.

6.How does Aetrix verify that IR3800AMTRPBF is sourced from the original manufacturer or authorized distributors?

All IR3800AMTRPBF 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 IR3800AMTRPBF meets industry standards.

7.What is the process for return or replacement of IR3800AMTRPBF?

All IR3800AMTRPBF units undergo pre-shipment inspection (PSI). If there is an issue with IR3800AMTRPBF, 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 IR3800AMTRPBF part is unused and in its original packaging.

Return procedure for IR3800AMTRPBF:

1.Submit a request within 90 days.

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

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