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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Full Half-Bridge (H Bridge) Drivers

Infineon Technologies IR3553MTRPBF

Name: IR3553MTRPBF
Brand: Infineon Technologies
SKU: IR3553MTRPBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IR3553MTRPBF

Manufacturer:: Infineon Technologies

Category:: Full Half-Bridge (H Bridge) Drivers

Package:: 25-PowerVFQFN

Datasheet:: IR3553MTRPBF.pdf

Description:: IC HALF BRIDGE DRIVER 40A 2PQFN

Quantity:: RFQ Add To RFQ list

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Product details

Overview

IR3553MTRPBF from Infineon Technologies is a 40A integrated PowIRstage® synchronous buck power stage combining gate driver, control MOSFET, synchronous MOSFET, and integrated Schottky diode in a single 4mm × 6mm PQFN package. It delivers peak efficiency of 93.2% at 1.2V output, supports up to 1.0MHz switching, and features integrated current sense amplifier with 32.5 V/V gain for high-accuracy phase current monitoring in CPU/GPU core VRs.

For engineers reviewing the IR3553MTRPBF datasheet, IR3553MTRPBF pinout, IR3553MTRPBF application, or IR3553MTRPBF equivalent, key selection criteria include its DrMOS V4.0 compliance, Body-Braking® transient support, diode-emulation mode for light-load efficiency, and PCB footprint compatibility with IR3550/IR3551 for scalable design reuse.

Technical Context

The IR3553 implements a co-packaged synchronous buck topology with monolithic integration of high-side and low-side MOSFETs, bootstrap gate driver, and precision current-sense amplifier referenced to REFIN. Its internal timing optimization minimizes dead-time loss and enables stable operation up to 1.0MHz under 4.5–15V VIN and 0.25V–(VCC−2.5V) VOUT ranges.

Body-Braking® is implemented via tri-state PWM control (BBRK#-enabled), allowing rapid discharge of output capacitors during load transients. Diode-emulation mode eliminates zero-current detection burden on the controller by internally managing low-side conduction during discontinuous conduction mode.

Key Specifications

Parameter	Value and Actual Design Meaning
Peak Efficiency	93.2% at 1.2V/40A/300kHz - enables minimal thermal derating in dense server VRMs
Output Current	40A DC continuous - supports high-performance CPU/GPU core rails without parallel stages
Switching Frequency	200–1000 kHz - allows compact magnetics and fast transient response in space-constrained designs
Current Sense Gain	32.5 V/V ±2.5 V/V - provides accurate IOUT signal for precise phase current reporting to controller
VIN Range	4.5V to 15V - compatible with standard 12V input bus and intermediate bus architectures
Package	25-pin PQFN, 4mm × 6mm × 0.9mm - enables dual-sided cooling and matches IR3550/IR3551 footprints
DrMOS Compliance	Intel DrMOS V4.0 - ensures interoperability with industry-standard VR12/VR13 controllers

Pinout & Package

IR3553MTRPBF uses a thermally enhanced 25-pin PQFN package (4mm × 6mm × 0.9mm) with exposed thermal pad (pin 13) and dual ground planes (PGND/LGND/TGND) optimized for efficient heat transfer and noise isolation.

Pin/Terminal	Circuit Role	Design Meaning
1, 2 (CSIN−, CSIN+)	Differential current sense inputs	Interface to external shunt or DCR network; referenced to LGND; enable ±450 µV offset accuracy
3 (VCC)	Bias supply for logic and drivers	4.5–7V input; requires ≥0.22µF decoupling to PGND; includes UVLO (3.3–4.1V start)
4, 12, 13 (PGND)	Power ground return	High-current return path for MOSFETs and drivers; connects to thermal pad for θJB = 2.5°C/W
5, 25 (GATEL)	Low-side gate driver outputs	Accessible test points for waveform observation; drive synchronous MOSFET gate directly
6–11 (SW)	Switch node	High dv/dt node connecting control/synchronous MOSFETs; rated for 25V max, 60A peak
14–16 (VIN)	Main input voltage connection	4.5–15V input; requires local 10µF + 0.22µF ceramic decoupling per pin group
17 (BOOST)	Bootstrap capacitor terminal	Charges high-side driver; requires ≥0.22µF cap to SW with minimal trace inductance
18 (PHSFLT#)	Open-drain phase fault indicator	Asserts low on MOSFET short/open or junction temp >160°C; requires external pull-up
19 (PWM)	3.3V logic-level tri-state input	"High" = HS on, "Low" = LS on, "Tri-state" = Body-Braking® or diode emulation activation
20 (BBRK#)	Body-Braking® enable / diode emulation select	Pulled low ≥20ns after VCC UVLO to activate diode emulation; weak internal 3.3V pull-up
21 (LGND)	Signal ground reference	Reference for PWM, REFIN, CSIN+, CSIN−; must be isolated from PGND/TGND in layout
22 (REFIN)	Current sense reference voltage	Defines IOUT offset; range 0.25V to (VCC−2.5V); connect to LGND if current sense unused
23 (IOUT)	Current sense amplifier output	Voltage = V(REFIN) + 32.5×[V(CSIN+)−V(CSIN−)]; floats if current sense disabled
24 (TGND)	Internal thermal/signal ground	Electrically isolated from PGND/LGND; connect to PGND only if current sense not used

Key Features

Feature	Design Value
Integrated Schottky diode	Eliminates external body-diode conduction loss during dead time, improving light-load efficiency
Body-Braking® load transient support	Tri-state PWM control rapidly discharges output capacitance, reducing required bulk capacitance by up to 30%
Diode-emulation high-efficiency mode	Internally manages low-side conduction during DCM, removing zero-current detection requirement from controller
Thermally optimized PQFN package	θJB = 2.5°C/W enables >40A operation with passive cooling on 8-layer PCB
DrMOS V4.0 compliance	Guarantees interoperability with Intel VR12/VR13 controllers including phase interleaving and telemetry

Applications

CPU Core Voltage Regulation

GPU Core Power Delivery

Use Scenario: High-current, fast-transient regulation for multi-core x86 server CPUs requiring <1% output voltage deviation under 20A/µs load steps.

IC Role / Device Role / Timing Role: Integrated PowIRstage® providing complete high-side/low-side switching, current sensing, and thermal protection in single-phase VRM stage.

Use Value: 93.2% peak efficiency at 1.2V/40A reduces system power loss by >1.5W per phase versus discrete solutions, lowering thermal design complexity.

Use Scenario: Compact, high-density power delivery for PCIe-based AI accelerators with dynamic power ranging from 5A to 40A across multiple voltage rails.

IC Role / Device Role / Timing Role: Synchronous buck power stage implementing diode-emulation mode to maintain >90% efficiency down to 5% load without controller firmware changes.

Use Value: Tri-state PWM and Body-Braking® reduce output capacitor count by 2–3× compared to conventional DrMOS, saving >15mm² PCB area per phase.

DDR Memory Array Supply

High-Performance FPGA Core Rail

Use Scenario: Low-noise, tightly regulated 1.2V supply for DDR4/DDR5 memory subsystems requiring <±10mV tolerance and <500ns transient recovery.

IC Role / Device Role / Timing Role: Single-phase VRM stage delivering 40A with integrated current sense amplifier enabling real-time per-phase current telemetry to PMBus controller.

Use Value: 32.5 V/V current sense gain and ±450 µV offset enable <±1.5% current measurement accuracy, supporting dynamic phase shedding and thermal balancing.

Use Scenario: Reconfigurable core rail for Xilinx Versal or Intel Agilex FPGAs where power demand shifts between 10A static and 35A burst modes during compute acceleration.

IC Role / Device Role / Timing Role: High-frequency (up to 1.0MHz) PowIRstage® enabling 150nH inductor use, reducing solution size while maintaining <200ns load-step response.

Use Value: Efficient dual-sided cooling and 2.5°C/W θJB allow full 40A rating without heatsink in 6mm-high chassis, simplifying mechanical integration.

Equivalent & Alternatives

The following parts are listed as comparable options for similar integrated power stage applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
IR3551MPBF	50A DC rating, identical 4mm × 6mm footprint, same DrMOS V4.0 interface	Higher current capability suits GPU VRMs with >45A peak demands; slightly higher conduction loss at 40A	Select when scaling from IR3553 to higher-current phases without layout change
IR35203MTRPBF	40A rating, 5mm × 6mm package, supports 3-phase interleaving with integrated telemetry	Includes PMBus interface and digital current/voltage telemetry; larger footprint and higher BOM cost	Select when system-level power monitoring and remote configuration are required

Compared with IR3551MPBF and IR35203MTRPBF, the IR3553MTRPBF offers optimal balance of compact size, 93.2% efficiency at 40A, and cost-effective analog telemetry-making it ideal for space-constrained, high-efficiency single-phase CPU/GPU core VRMs where digital bus overhead is unnecessary.

Availability

IR3553MTRPBF is available at Aetrix Electronics and suitable for CPU core voltage regulation, GPU power delivery, and DDR memory array supplies requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.

Supply support for IR3553MTRPBF 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 global semiconductor leader specializing in power management, automotive, and industrial control ICs, with deep expertise in silicon and silicon carbide power devices.

The PowIRstage® product line delivers fully integrated, high-efficiency power stages optimized for CPU, GPU, and memory VRMs in servers, workstations, and AI accelerators-prioritizing thermal performance, layout simplicity, and DrMOS interoperability.

FAQ

What is the maximum recommended operating junction temperature for IR3553MTRPBF?

The maximum operating junction temperature is 125°C under continuous DC load conditions. The device incorporates a thermal flag (PHSFLT#) that asserts low when junction temperature exceeds 160°C (rising threshold) and releases at 135°C (falling threshold), providing overtemperature protection with 25°C hysteresis for reliable operation in high-power density environments.

How does the IR3553MTRPBF implement diode-emulation mode?

Diode-emulation mode is activated by pulling BBRK# low for ≥20ns after VCC passes UVLO. Internally, this configures the PWM logic to conduct the synchronous MOSFET during negative inductor current, eliminating reverse recovery losses and removing the need for external zero-current detection circuitry-enabling >90% efficiency at loads below 10% of rated current without controller modification.

Can IR3553MTRPBF be used without the integrated current sense amplifier?

Yes. When current sensing is disabled, CSIN+ and CSIN− must be tied to LGND, REFIN connected to LGND, IOUT left floating, and TGND connected to PGND. The device operates as a standard DrMOS stage with PWM-controlled switching only, retaining all protection features (PHSFLT#, thermal flag, UVLO) and 40A capability without current telemetry.

What is the purpose of the separate LGND and TGND pins?

LGND serves as the reference for analog circuits (current sense amplifier, REFIN, PWM input), while TGND connects internally to power and signal ground of the driver. For optimal current sense accuracy, LGND and TGND must be electrically isolated in PCB layout to prevent noise coupling from high di/dt PGND currents into the sensitive analog front-end-ensuring ±450 µV offset and >60dB PSRR performance.

IR3553MTRPBF Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: PowIRstage®

Package/Case:: 25-PowerVFQFN

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Output Configuration:: Half Bridge

Applications:: Synchronous Buck Converters, Voltage Regulators

Interface:: PWM

Load Type:: Inductive

Technology:: Power MOSFET

Rds On (Typ):: -

Current - Output / Channel:: 40A

Current - Peak Output:: 60A

Voltage - Supply:: 4.5V ~ 7V

Voltage - Load:: 4.5V ~ 15V

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

Grade:: -

Qualification:: -

Features:: Bootstrap Circuit, Diode Emulation, Status Flag

Fault Protection:: Over Temperature, UVLO

Mounting Type:: Surface Mount

Supplier Device Package:: 25-PQFN (4x6)

IR3553MTRPBF FAQ

1.How can I place an order for IR3553MTRPBF through Aetrix?

Please submit a Request for Quotation (RFQ) for IR3553MTRPBF 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 IR3553MTRPBF reliable?

The price and inventory of IR3553MTRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IR3553MTRPBF is usually 5 days.

3.What payment methods are accepted for IR3553MTRPBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IR3553MTRPBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IR3553MTRPBF?

IR3553MTRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IR3553MTRPBF 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 IR3553MTRPBF?

For technical support, including IR3553MTRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IR3553MTRPBF requirements.

6.How does Aetrix verify that IR3553MTRPBF is sourced from the original manufacturer or authorized distributors?

All IR3553MTRPBF 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 IR3553MTRPBF meets industry standards.

7.What is the process for return or replacement of IR3553MTRPBF?

All IR3553MTRPBF units undergo pre-shipment inspection (PSI). If there is an issue with IR3553MTRPBF, 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 IR3553MTRPBF part is unused and in its original packaging.

Return procedure for IR3553MTRPBF:

1.Submit a request within 90 days.

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

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