My Inquiry
My Account
Infineon Technologies IR3825MTRPBF
- Part No.:
- IR3825MTRPBF
- Manufacturer:
- Infineon Technologies
- Package:
- -
- Datasheet:
-
IR3825MTRPBF.pdf
- Description:
- IC REG BUCK CTRLR PQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,287
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
IR3825MTRPBF from Infineon Technologies is a 20A 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 programmable switching frequency, and features thermally compensated over-current protection with three selectable trip points. Used in server VR12/VR13 point-of-load power stages.
For engineers reviewing the IR3825MTRPBF datasheet, IR3825MTRPBF pinout, IR3825MTRPBF application, or IR3825MTRPBF equivalent, key selection criteria include its PQFN 5×6 mm package, monotonic pre-bias start-up, precision 0.6V ±0.6% reference, programmable PGood threshold, and ILIM pin-configurable current limit settings for telecom and storage power delivery.
Technical Context
The IR3825 implements a voltage-mode PWM control architecture with feed-forward line regulation and internal digital soft-start. Its error amplifier uses Fb as inverting input and Comp as compensation node, enabling stable loop tuning across wide load transients.
It integrates dual N-channel MOSFET drivers with boot capacitor biasing (Boot–SW), separate PGnd and Gnd planes for noise isolation, and an internal LDO (Vcc/LDO_Out) that can be bypassed by external 5V supply-enabling operation down to 1V PVin when externally biased.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 20 A continuous; supports high-density server PoL rails without external current-sense amplifiers |
| Input Voltage Range | 1.0 V to 21 V PVin; enables single-rail operation from 12 V or 5 V bus, or ultra-low-vin backup scenarios |
| Output Voltage Range | 0.6 V to 0.86×Vin; supports sub-1V CPU core rails and adaptive scaling with input tracking |
| Switching Frequency | 300 kHz to 1.5 MHz; adjustable via Rt-to-GND resistor for EMI optimization or efficiency trade-off |
| Reference Accuracy | 0.6 V ±0.6%; ensures ±3.6 mV absolute output tolerance at 0.6 V setting for DDR memory compliance |
| Junction Temp Range | −40 °C to +125 °C; qualified for industrial and telecom base station ambient conditions |
| Thermal Resistance | θJA = 30 °C/W; requires ≥4 cm² 2-oz copper pour and 200 LFM airflow for full 20 A at 12 V→1 V |
Pinout & Package
PQFN 5 mm × 6 mm, 17-pin exposed-pad package with thermal pad on underside; RoHS-compliant, halogen-free, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 Fb | Inverting feedback input | Connects to output divider; sets regulated Vout with 0.6 V reference; high-impedance node for stability tuning |
| 3 Comp | Error amplifier output | Interface for Type II/III compensation network between Fb and Gnd; determines loop bandwidth and phase margin |
| 5 Rt | Frequency set input | Resistor-to-Gnd defines free-running fSW; 100 kΩ → 600 kHz, 30 kΩ → 1.5 MHz per datasheet curve |
| 6 ILIM | Current limit select | Floating = 25 A, tied to Vcc = 30 A, tied to PGnd = 20 A; configures OCP threshold without external sense resistor |
| 7 PGood | Open-drain status output | Asserts high after soft-start and Vout within ±10%; requires external pull-up to ≤Vcc for sequencing control |
| 8 Vsns | OVP and PGood sense | Monitors output rail directly; triggers shutdown if >115% Vout; enables accurate PGood assertion independent of Fb divider |
| 9 Vin | LDO input | Bias source for internal 5 V LDO; short to Vcc/LDO_Out if external 5 V used; decoupled with 1 µF ceramic |
| 10 Vcc/LDO_Out | LDO output / external bias input | Supplies gate drivers and logic; accepts external 4.5–7.5 V supply to extend low-input operation |
| 11 PGnd | Power ground return | Separate low-impedance path for high-current MOSFET sources; must connect to power plane under thermal pad |
| 12 SW | Switch node | Connects to output inductor; carries full AC ripple current; requires tight layout to minimize EMI and shoot-through risk |
| 13 PVin | Main power input | High-current input for power stage; routed with wide copper and low-inductance path to bulk capacitors |
| 14 Boot | High-side driver supply | Charged via 100 nF capacitor to SW; provides gate drive voltage ≥Vsw+5 V for top FET turn-on |
| 15 Enable | UVLO-enabled enable input | Active-high; resistor-divider from PVin allows programmable undervoltage lockout (e.g., 10.8 V UVLO at 12 V rail) |
Key Features
| Feature | Design Value |
|---|---|
| Integrated MOSFETs + Drivers | Eliminates 4 external FETs and 2 driver ICs; reduces BOM count and layout area by >40% vs discrete buck solutions |
| Three-Setting ILIM Pin | Enables one-part support for 20/25/30 A current limits without changing PCB layout or firmware |
| Monotonic Pre-Bias Start-Up | Prevents reverse current flow into powered loads during hot-insertion; critical for PCIe add-in cards and modular servers |
| Programmable Power Good | Independent Vsns sensing allows PGood assertion accuracy unaffected by Fb divider tolerance or trace resistance |
| Thermally Compensated OCP | Current limit scales with junction temperature to maintain safe SOA across −40°C to +125°C operating range |
Applications
| Server VR12/VR13 Core Rails | Telecom Line Card PoL |
|---|---|
Use Scenario: Delivering 0.8 V @ 18 A to Intel Xeon processors in 1U rack servers with strict transient response requirements. IC Role / Device Role / Timing Role: Primary point-of-load regulator with feed-forward line regulation and 600 kHz switching for balanced efficiency/transient performance. Use Value: Monotonic start-up prevents reverse current into pre-biased CPU VDDQ, while 0.6 V ±0.6% reference meets VR12.5 ±1% output tolerance spec. | Use Scenario: Powering FPGA and SerDes on 3G/4G base station line cards with 12 V backplane input and −40°C to +85°C ambient. IC Role / Device Role / Timing Role: High-efficiency buck converter with extended temperature rating and programmable UVLO for brown-out resilience. Use Value: ILIM pin configuration supports 20 A nominal and 30 A peak loads; thermal shutdown protects against airflow loss in sealed enclosures. |
| Enterprise Storage Controller Rails | Network Switch ASIC Core Supply |
Use Scenario: Generating 0.95 V @ 16 A for NVMe SSD controllers in all-flash arrays requiring fast load-step response. IC Role / Device Role / Timing Role: Synchronous buck regulator with digital soft-start and enhanced load regulation for <500 ns transient recovery. Use Value: Comp pin enables custom loop compensation to achieve >60° phase margin with low-ESR polymer output caps, reducing output capacitance by 30%. | Use Scenario: Supplying 0.75 V @ 20 A to Broadcom Tomahawk switch ASICs in spine-leaf data center switches. IC Role / Device Role / Timing Role: High-current, high-efficiency PoL regulator with programmable fSW (1.2 MHz) to avoid noise coupling into SerDes lanes. Use Value: PQFN 5×6 mm package fits dense switch PCB layouts; separate PGnd/Gnd minimizes ground bounce affecting adjacent high-speed signals. |
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) | 20 A rated, 2.5–18 V input, fixed 0.6 V ref, no ILIM pin; requires external current-sense resistor | Lacks programmable current limit and pre-bias start-up; less suited for hot-plug server modules | Choose for cost-sensitive telecom PoL where fixed OCP and simpler layout outweigh feature gaps |
| TPS53689TSSR (Texas Instruments) | 25 A, 4.5–24 V input, D-CAP3 control, integrated current sensing, but larger 6×6 mm QFN | Superior transient response and telemetry (I2C/PMBus), but higher BOM cost and footprint | Choose when digital monitoring, multi-phase sync, or tighter output tolerance (<±0.5%) are required |
Compared with MP8765GQ-Z and TPS53689TSSR, IR3825MTRPBF uniquely balances integration (integrated MOSFETs + LDO + bootstrap diode), configurability (3 ILIM settings, programmable fSW), and compact PQFN 5×6 mm size-making it optimal for space-constrained, high-reliability server and storage PoL designs where analog flexibility matters more than digital telemetry.
Availability
IR3825MTRPBF is available at Aetrix Electronics and suitable for server power delivery, telecom line card PoL, and enterprise storage controller rails requiring stable component supply, long-lifecycle availability, and consistent parametric performance across production batches.
Supply support for IR3825MTRPBF 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 SupIRBuck® product line delivers highly integrated, thermally robust DC/DC regulators targeting high-current, low-voltage point-of-load applications in data centers, networking, and storage infrastructure.
FAQ
What is the minimum input voltage supported by IR3825MTRPBF when using external Vcc bias?
When externally biased via Vcc/LDO_Out with a regulated 4.5–7.5 V supply, IR3825MTRPBF supports PVin as low as 1.0 V. In this mode, the internal LDO is disabled, and Vin pin must be shorted to Vcc/LDO_Out. This enables ultra-low-input applications such as battery-backed 1.2 V rails or post-regulation from intermediate bus converters.
How does the ILIM pin configure over-current protection thresholds?
The ILIM pin selects among three factory-trimmed current limits: floating = 20 A, tied to Vcc = 25 A, tied to PGnd = 30 A. These settings correspond to different internal current-sense amplifier gains and are thermally compensated across −40°C to +125°C. No external components are needed-configuration is purely pin-strapping.
Can IR3825MTRPBF operate without an external bootstrap capacitor?
No. A 100 nF ceramic capacitor must be placed between Boot and SW pins to charge the high-side driver bootstrap circuit. Omitting it prevents proper top-FET gate drive, causing failure to regulate or catastrophic shoot-through. The capacitor must be low-ESR, placed adjacent to the IC with minimal loop area.
What is the purpose of the separate PGnd and Gnd pins?
PGnd serves as the dedicated return path for high-current MOSFET sources and driver circuits, while Gnd supplies low-noise reference and control logic. Separating them prevents switching noise from modulating the error amplifier and improves PSRR. Both must connect to the same system ground plane-but via independent low-inductance paths under the thermal pad and signal section respectively.
IR3825MTRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- -
- Output Configuration:
- -
- Topology:
- -
- Output Type:
- -
- Number of Outputs:
- -
- Voltage - Input (Min):
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- -
- Synchronous Rectifier:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
IR3825MTRPBF FAQ
1.How can I place an order for IR3825MTRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for IR3825MTRPBF 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 IR3825MTRPBF reliable?
The price and inventory of IR3825MTRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IR3825MTRPBF is usually 5 days.
3.What payment methods are accepted for IR3825MTRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IR3825MTRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IR3825MTRPBF?
IR3825MTRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IR3825MTRPBF 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 IR3825MTRPBF?
For technical support, including IR3825MTRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IR3825MTRPBF requirements.
6.How does Aetrix verify that IR3825MTRPBF is sourced from the original manufacturer or authorized distributors?
All IR3825MTRPBF 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 IR3825MTRPBF meets industry standards.
7.What is the process for return or replacement of IR3825MTRPBF?
All IR3825MTRPBF units undergo pre-shipment inspection (PSI). If there is an issue with IR3825MTRPBF, 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 IR3825MTRPBF part is unused and in its original packaging.
Return procedure for IR3825MTRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
IR3825MTRPBF Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…
