Infineon Technologies BSC0921NDIATMA1

Overview

BSC0921NDIATMA1 from Infineon Technologies is a dual N-channel OptiMOS™ power MOSFET in PG-TISON-8 package, designed for high-efficiency synchronous buck converters. It features 30 V V_DS, 5.0 mΩ (Q1) and 1.6 mΩ (Q2) R_DS(on) at V_GS = 10 V, and logic-level gate drive compatibility down to 4.5 V - enabling direct interfacing with standard microcontroller GPIOs in DC/DC point-of-load applications.

For engineers reviewing the BSC0921NDIATMA1 datasheet, BSC0921NDIATMA1 pinout, BSC0921NDIATMA1 application, or BSC0921NDIATMA1 equivalent, key selection criteria include asymmetric channel optimization (Q1 for high-side switching, Q2 for low-side conduction), thermal resistance asymmetry (R_thJC = 4.5 K/W for Q1, 1.7 K/W for Q2), and integrated body diode performance (V_SD = 0.9 V at 20 A for Q1, 0.56 V at 8 A for Q2).

Technical Context

This dual MOSFET integrates two discrete N-channel silicon power transistors on a single die with shared source terminals and independent gate/drain connections. Q1 is optimized for voltage switching with lower gate charge (Q_g = 5.9–8.9 nC) and higher R_DS(on), while Q2 is optimized for current conduction with ultra-low R_DS(on) (1.6 mΩ max at 10 V) and higher output capacitance (C_oss = 1100–1463 pF).

The device uses Infineon's OptiMOS™ trench process, delivering enhanced figure-of-merit (R_DS(on) × Q_g) for both channels. Its thermal design accommodates asymmetric power dissipation: Q1 has higher junction-to-case resistance (4.5 K/W), reflecting its role in transient-switching loss dominance, whereas Q2's 1.7 K/W R_thJC supports sustained conduction loss handling.

Key Specifications

Pinout & Package

Package: PG-TISON-8 (exposed drain pad, thermally enhanced SO-8 variant). Pin assignment verified per Infineon datasheet Rev. 2.0 (2013-07-30), with pins 1–4 assigned to Q1 and pins 5–8 to Q2, sharing source terminals (pins 4 and 5).

Key Features

Applications

Equivalent & Alternatives

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

Compared with IPB80N04S4-03 and SPW24N60C3, BSC0921NDIATMA1 delivers integrated dual-channel functionality, logic-level compatibility, and optimized FOM for sub-30 V buck converters - reducing component count, layout area, and gate drive complexity in compact, high-efficiency POL applications.

Availability

BSC0921NDIATMA1 is available at Aetrix Electronics and suitable for server VRMs, industrial PLC power supplies, and telecom base station PSUs requiring stable component supply, long-term lifecycle support, and traceable sourcing from authorized channels.

Supply support for BSC0921NDIATMA1 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 security solutions, with global R&D and manufacturing infrastructure.

BSC0921NDIATMA1 belongs to the OptiMOS™ 5 family, engineered specifically for high-frequency, high-efficiency DC/DC conversion in data center, industrial, and communications infrastructure where power density and thermal performance are critical.

FAQ

What is the maximum allowable gate-source voltage for BSC0921NDIATMA1?

The absolute maximum V_GS is ±20 V, as specified in the datasheet's "Maximum ratings" table. Operation beyond this risks irreversible gate oxide damage. Recommended gate drive is 0 V to 10 V for reliable switching; 4.5 V minimum ensures full enhancement of both channels without overvoltage stress.

Can BSC0921NDIATMA1 be used in a half-bridge configuration with external bootstrap circuitry?

Yes - its Q1 channel is rated for high-side operation with V_DS = 30 V and logic-level gate drive. When used in a half-bridge, Q1 serves as the high-side switch controlled by a bootstrap gate driver (e.g., IRS21844), while Q2 operates as the low-side switch with ground-referenced gate drive.

Does BSC0921NDIATMA1 have integrated ESD protection on its gate terminals?

No - the datasheet does not specify on-chip ESD protection structures. External gate resistors (10–100 Ω) and TVS diodes (e.g., PGB1010603) are recommended for handling HBM >2 kV events during PCB handling and system integration.

How does the thermal resistance asymmetry between Q1 and Q2 affect PCB layout?

Q2's lower R_thJC (1.7 K/W vs. Q1's 4.5 K/W) indicates it transfers heat more efficiently to the case - so its drain pad must connect to a larger copper area (≥6 cm²) with multiple thermal vias. Q1's higher R_thJC demands careful attention to junction-to-ambient path, including airflow and adjacent component placement to avoid localized hot spots.