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Home > Products > Discrete Semiconductor Products > Transistors > FETs, MOSFETs > FETs, MOSFETs

Infineon Technologies IRLR7821TRLPBF

Name: IRLR7821TRLPBF
Brand: Infineon Technologies
SKU: IRLR7821TRLPBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IRLR7821TRLPBF

Manufacturer:: Infineon Technologies

Category:: FETs, MOSFETs

Package:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Datasheet:: IRLR7821TRLPBF.pdf

Description:: MOSFET N-CH 30V 65A DPAK

Quantity:: RFQ Add To RFQ list

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Product details

Overview

IRLR7821TRLPBF from Infineon Technologies is a 30V, 7.5 mΩ (typ), 65A N-channel enhancement-mode HEXFET Power MOSFET in D-Pak (TO-252) package, optimized for high-frequency synchronous buck converters in CPU core power delivery and telecom DC-DC modules with 4.5V gate drive capability.

For engineers reviewing the IRLR7821TRLPBF datasheet, IRLR7821TRLPBF pinout, IRLR7821TRLPBF application, or IRLR7821TRLPBF equivalent, key selection criteria include R_DS(on) at 4.5V V_GS, total gate charge (10 nC typ), avalanche energy rating (230 mJ), body diode reverse recovery charge (15–23 nC), and thermal resistance R_θJC (2.0°C/W).

Technical Context

This MOSFET employs planar silicon HEXFET architecture with fully characterized unclamped inductive switching (UIS) capability and tightly specified gate threshold voltage (1.0–2.3 V). Its low Q_gd/Q_gs1 ratio minimizes C_dv/dt turn-on risk in high-dV/dt synchronous rectifier nodes.

Designed for hard-switched topologies, it delivers stable R_DS(on) up to 175°C junction temperature and supports fast switching with t_r = 4.2 ns and t_f = 3.2 ns at V_DD = 15 V, I_D = 12 A, and R_G = 0.01 Ω - critical for minimizing conduction and switching losses in sub-1 MHz converter designs.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	30 V - maximum blocking voltage compatible with 24 V input rails and transient overvoltage margin in telecom/industrial DC-DC stages
R_DS(on) @ 4.5 V	7.5 mΩ (typ) - enables <1 W conduction loss at 40 A RMS in CPU VRMs using 4.5 V gate drive from controller ICs
Q_g	10 nC (typ) - determines gate driver current requirement and switching speed; enables efficient 500 kHz–1 MHz operation
E_AS	230 mJ - specifies single-pulse avalanche robustness during load dump or short-circuit events without failure
R_θJC	2.0 °C/W - allows direct heatsinking to PCB copper or external heatsink; supports >65 A continuous current at T_C = 100°C
Q_rr	15–23 nC - quantifies body diode reverse recovery loss transferred to high-side FET; impacts efficiency and EMI in synchronous rectification
C_iss	1030 pF - influences gate drive loop stability and Miller effect; requires careful layout to avoid oscillation at high dV/dt

Pinout & Package

IRLR7821TRLPBF uses the standard D-Pak (TO-252AA) surface-mount package with exposed drain pad for thermal and electrical connection. The package features three leads: Gate (G), Drain (D), and Source (S), with Drain electrically connected to the tab.

Pin/Terminal	Circuit Role	Design Meaning
G	Gate control terminal	Receives PWM signal from controller; low input capacitance (C_iss = 1030 pF) reduces driver loading
D	Drain (high-side switch node)	Connected to PCB thermal pad; carries full load current and sees full input-to-output voltage swing
S	Source (power ground reference)	Provides return path for load current; used as reference for gate drive and current sensing in low-side configuration

Key Features

Feature	Design Value
Ultra-low R_DS(on) at 4.5 V	7.5 mΩ typ - eliminates need for gate boosters in 5 V logic-level systems, simplifying VRM design
Fully characterized avalanche	230 mJ single-pulse E_AS - ensures reliable operation under inductive switching stress without derating
Low Q_gd/Q_gs1 ratio	2.5 nC / 2.0 nC = 1.25 - suppresses C_dv/dt induced turn-on in synchronous rectifier position
Optimized body diode	Q_rr = 15–23 nC, t_rr = 26–38 ns - reduces cross-conduction loss and EMI in high-frequency buck converters

Applications

Server CPU Voltage Regulator

Telecom 48 V Input DC-DC Converter

Use Scenario: High-current, multi-phase buck converter supplying 0.8–1.5 V to modern x86 processors with dynamic load steps up to 300 A/µs.

IC Role / Device Role: Low-side synchronous rectifier MOSFET handling continuous 65 A and pulsed 260 A source current via integrated body diode.

Use Value: 7.5 mΩ R_DS(on) at 4.5 V enables >92% efficiency at 100 A output while maintaining <40°C case rise on 2 oz copper.

Use Scenario: Isolated forward or active-clamp forward converter with secondary-side synchronous rectification for 12 V or 5 V outputs from 48 V telecom rectified bus.

IC Role / Device Role: Secondary-side power switch operating at 300–500 kHz, subjected to 48 V–60 V drain swings and fast body diode commutation.

Use Value: 230 mJ E_AS and 26–38 ns t_rr ensure robustness against transformer leakage spikes and reduce snubber losses.

Industrial PLC Power Module

Automotive ADAS Domain Controller Supply

Use Scenario: Non-isolated buck converter powering FPGA, DSP, and I/O interfaces in programmable logic controllers with wide ambient temperature range (−40°C to +85°C).

IC Role / Device Role: Primary power switch in 24 V input → 3.3 V/5 V/12 V multi-rail supply, rated for 100% load at T_C = 100°C.

Use Value: R_θJC = 2.0°C/W and 175°C max T_J allow full-rated current without forced air, reducing system cooling cost.

Use Scenario: Compact 12 V input → 1.0 V/1.8 V core supply for radar processing SoCs in automotive ADAS domain controllers with ASIL-B functional safety requirements.

IC Role / Device Role: Low-side FET in multiphase VRM delivering up to 120 A with tight voltage regulation and fast transient response.

Use Value: Tight V_GS(th) distribution (1.0–2.3 V) and low ∆V_GS(th)/°C (−5.3 mV/°C) ensure predictable turn-on timing across automotive temperature range.

Equivalent & Alternatives

The following parts are listed as comparable options for similar N-channel power MOSFET applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
IRLR3915TRLPBF	R_DS(on) = 12 mΩ @ 4.5 V; Q_g = 14 nC; V_DS = 30 V	Higher conduction loss; suitable only for ≤40 A loads at same frequency	Select when lower gate charge sensitivity or higher avalanche margin is required over R_DS(on)
SI7850DP-T1-GE3	R_DS(on) = 6.2 mΩ @ 4.5 V; Q_g = 12.5 nC; SO-8 package; no exposed drain pad	Limited thermal performance (R_θJA ≈ 62°C/W); unsuitable for >35 A continuous	Prefer for space-constrained, lower-current designs where PCB area is more critical than thermal headroom

Compared with IRLR3915TRLPBF and SI7850DP-T1-GE3, IRLR7821TRLPBF offers the optimal balance of low R_DS(on), moderate Q_g, and superior thermal dissipation in D-Pak - making it the preferred choice for high-current, thermally constrained synchronous buck stages above 50 A.

Availability

IRLR7821TRLPBF is available at Aetrix Electronics and suitable for server CPU voltage regulators, telecom 48 V DC-DC converters, and industrial PLC power modules requiring stable component supply and long-term production continuity.

Supply support for IRLR7821TRLPBF 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 electronics, and industrial control ICs and discrete devices.

The HEXFET Power MOSFET product line targets high-efficiency, high-reliability power conversion in computing, telecom, and industrial applications - emphasizing low R_DS(on), fast switching, and rugged avalanche performance.

FAQ

Is IRLR7821TRLPBF lead-free and RoHS-compliant?

Yes, IRLR7821TRLPBF is lead-free and RoHS-compliant per EU Directive 2011/65/EU. The "PbF" suffix in its original part number (IRLR7821PbF) explicitly denotes lead-free termination, and Infineon confirms full compliance with JEDEC J-STD-609A Class 3 marking standards and halogen-free material content.

Can IRLR7821TRLPBF be used as a high-side switch?

No - IRLR7821TRLPBF is an N-channel MOSFET requiring gate voltage ≥ V_DS + V_GS(th) for full enhancement. It lacks integrated bootstrap circuitry or level-shifting capability. For high-side switching in buck or half-bridge topologies, a dedicated high-side driver or P-channel alternative (e.g., IRLR7833) is required.

What is the maximum recommended PCB copper area for thermal relief?

Infineon recommends a minimum 400 mm² (20 mm × 20 mm) 2-oz copper pour connected directly to the exposed drain pad via ≥6 thermal vias (0.3 mm diameter, filled or plated) to achieve the rated R_θJC = 2.0°C/W. Smaller pads increase R_θJA significantly - e.g., 100 mm² raises R_θJA to ~75°C/W.

Does IRLR7821TRLPBF require gate resistors for stability?

Yes - a series gate resistor (typically 2.2–10 Ω) is required to dampen ringing caused by L_g–C_iss resonance and prevent spurious turn-on due to high dV/dt. Layout best practices include minimizing gate loop area and routing the gate trace away from high-dV/dt drain paths to avoid coupling.

IRLR7821TRLPBF Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: HEXFET®

Package/Case:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 30 V

Current - Continuous Drain (Id) @ 25°C:: 65A (Tc)

Drive Voltage (Max Rds On, Min Rds On):: 4.5V, 10V

Rds On (Max) @ Id, Vgs:: 10mOhm @ 15A, 10V

Vgs(th) (Max) @ Id:: 1V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 14 nC @ 4.5 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 1030 pF @ 15 V

FET Feature:: -

Power Dissipation (Max):: 75W (Tc)

Operating Temperature:: -55°C ~ 175°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: TO-252AA (DPAK)

IRLR7821TRLPBF FAQ

1.How can I place an order for IRLR7821TRLPBF through Aetrix?

Please submit a Request for Quotation (RFQ) for IRLR7821TRLPBF 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 IRLR7821TRLPBF reliable?

The price and inventory of IRLR7821TRLPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IRLR7821TRLPBF is usually 5 days.

3.What payment methods are accepted for IRLR7821TRLPBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IRLR7821TRLPBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IRLR7821TRLPBF?

IRLR7821TRLPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IRLR7821TRLPBF 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 IRLR7821TRLPBF?

For technical support, including IRLR7821TRLPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IRLR7821TRLPBF requirements.

6.How does Aetrix verify that IRLR7821TRLPBF is sourced from the original manufacturer or authorized distributors?

All IRLR7821TRLPBF 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 IRLR7821TRLPBF meets industry standards.

7.What is the process for return or replacement of IRLR7821TRLPBF?

All IRLR7821TRLPBF units undergo pre-shipment inspection (PSI). If there is an issue with IRLR7821TRLPBF, 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 IRLR7821TRLPBF part is unused and in its original packaging.

Return procedure for IRLR7821TRLPBF:

1.Submit a request within 90 days.

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

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