Infineon Technologies TDA21201-B7

Overview

TDA21201-B7 from Infineon is an integrated power stage combining a MOSFET driver, high-side and low-side Power MOSFETs, and internal bootstrap circuitry in a single TO-263-7-2 package. It delivers up to 30 A DC output current for 12 V to sub-3.3 V synchronous buck conversion, features 4.8 mΩ low-side and 13.3 mΩ high-side R_DS(on) at T_j = 25 °C, and supports standard 5 V TTL PWM inputs for motherboard VRMs and multi-phase CPU voltage regulators.

For engineers reviewing the TDA21201-B7 datasheet, TDA21201-B7 pinout, TDA21201-B7 application, or TDA21201-B7 equivalent, key selection considerations include its integrated bootstrap elimination, three-state shutdown capability (1.2–1.6 V input window), thermal shutdown at 150 °C, and compatibility with 100–500 kHz PWM controllers in high-density DC/DC power stages.

Technical Context

The TDA21201-B7 implements a fully self-contained synchronous buck power stage with monolithic integration of gate driver logic, high-side and low-side silicon MOSFETs, and internal charge-pump bootstrapping-eliminating external diodes and capacitors. Its input accepts standard 5 V TTL-level PWM signals, where 'Low' enables the low-side FET and 'High' enables the high-side FET, with a dedicated 1.2–1.6 V shutdown window that disables both FETs for zero gate-charge loss during no-load conditions.

Thermal coupling between driver and MOSFETs enables coordinated overtemperature protection at 150 °C, while dual V_CC pins (pins 6 and 7) feed both the driver supply and high-side gate drive, with ∆V_CC monitoring (≥0.45 V for >2 µs) to detect solder joint faults or supply imbalance. The device operates across 9–15 V V_CC, with no abrupt UVLO threshold-gate drive strength and R_DS(on) scale gradually with supply voltage.

Key Specifications

Pinout & Package

Package: TO-263-7-2 (D²PAK), surface-mount, thermally enhanced with exposed tab connected to V_OUT (pin 4).

Key Features

Applications

Equivalent & Alternatives

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

Compared with IR3557M and MP86957, the TDA21201-B7 uniquely combines full bootstrap integration, robust ∆V_CC fault detection, and a standardized three-state input-making it optimal for legacy and new ATX-compliant motherboard VRMs where reliability and drop-in controller compatibility are critical.

Availability

TDA21201-B7 is available at Aetrix Electronics and suitable for server CPU voltage regulators, desktop motherboard VRMs, laptop GPU core supplies, and network switch ASIC rails requiring stable component supply and long-lifecycle support.

Supply support for TDA21201-B7 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 power devices and integrated power systems.

The TDA21201 belongs to Infineon's Integrated Power Stage (IPS) product line, engineered specifically for high-efficiency, high-density DC/DC conversion in computing infrastructure-emphasizing thermal robustness, controller interoperability, and BOM reduction in multi-phase VRMs.

FAQ

What is the function of the dual V_CC pins (6 and 7) on the TDA21201-B7?

Pins 6 and 7 are paralleled V_CC inputs supplying power to both the internal MOSFET driver and the high-side gate charge pump. They are monitored differentially: if ∆V_CC ≥ 0.45 V for >2 µs, the device disables to prevent malfunction from asymmetric supply routing or poor solder joints-this is a hardware-level fault detection feature independent of external circuitry.

Does the TDA21201-B7 require external bootstrap components?

No. The TDA21201-B7 integrates all necessary bootstrap circuitry-including charge pump and level-shifting logic-within the monolithic package. Only three external connections are required: GND (pins 1–3), V_CC (pins 6–7), and IN (pin 5). This eliminates external bootstrap capacitors and diodes, reducing layout complexity and improving reliability.

How does the shutdown mode operate, and what input voltage triggers it?

The TDA21201-B7 enters shutdown when the IN pin (pin 5) is held at 1.2–1.6 V for more than 1.5 µs. In this state, both high-side and low-side MOSFETs turn off completely, eliminating gate drive current and static conduction loss. The shutdown releases automatically when IN transitions to either logic-low (<0.8 V) or logic-high (>2.1 V), restoring normal PWM-controlled operation.

Can the TDA21201-B7 be used in a single-phase 12 V to 5 V converter?

While the TDA21201-B7 is optimized for 12 V to sub-3.3 V conversion (e.g., 1.2 V, 1.8 V), it can operate at 5 V output-but efficiency drops significantly due to increased duty cycle and higher RMS currents in the low-side FET. Its R_DS(on) ratio and thermal design target low-V_OUT applications; for 5 V outputs, discrete or higher-V_OUT-optimized stages are recommended.