Infineon Technologies TDA21201-S7

Overview

TDA21201-S7 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-220-7-230 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 R_DS(on) at 25 °C, 13.3 mΩ high-side R_DS(on), and supports standard 5 V TTL PWM inputs for motherboard VRMs.

For engineers reviewing the TDA21201-S7 datasheet, TDA21201-S7 pinout, TDA21201-S7 application, or TDA21201-S7 equivalent, key selection criteria include its integrated bootstrap capability, three-state shutdown input (1.2–1.6 V), thermal shutdown at 150 °C, ±0.45 V ΔV_CC fault detection, and compatibility with multi-phase PWM controllers without external gate drive components.

Technical Context

The TDA21201-S7 implements a fully self-contained synchronous buck power stage using Infineon's multi-chip assembly technology. Its driver integrates dead-time control, shoot-through protection, and internal charge pump for high-side gate drive-eliminating external bootstrap diodes and capacitors. The dual MOSFETs are co-optimized for minimal conduction and switching losses at 12 V input and ≤3.3 V output.

It operates across 9–15 V V_CC, accepts 100–500 kHz PWM signals, and provides precise timing: t_d(ON) = 110–150 ns, t_d(OFF) = 70–100 ns, t_r/t_f = 10–30 ns. Shutdown is triggered by holding the IN pin at 1.2–1.6 V for >1.5 µs, reducing quiescent current to 10–22 mA while disabling both FETs.

Key Specifications

Pinout & Package

Package: TO-220-7-230 (7-pin through-hole, tab-connected to V_OUT). Thermal resistance: R_thJC = 1.9 K/W, R_thJA = 62.5 K/W (leaded).

Key Features

Applications

Equivalent & Alternatives

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

Compared with IR35201 and MP86957, the TDA21201-S7 offers superior analog reliability features - including three-state shutdown, ΔV_CC monitoring, and monolithic thermal shutdown - making it optimal for cost-sensitive, high-reliability motherboard and server VRMs where discrete component count and fault coverage are critical.

Availability

TDA21201-S7 is available at Aetrix Electronics and suitable for server CPU VRMs, desktop motherboard multi-phase regulators, GPU core power delivery, and AI accelerator board auxiliary rails requiring stable component supply and long-term industrial lifecycle support.

Supply support for TDA21201-S7 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-based power semiconductors and integrated power stages.

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

FAQ

What is the function of the dual V_CC pins (pins 6 and 7) on the TDA21201-S7?

Pins 6 and 7 are paralleled V_CC supply inputs that provide redundant 12 V power to the internal driver and MOSFETs. They enable current sharing and reduce trace impedance in the power loop. Critically, the device monitors the voltage difference (ΔV_CC) between them - triggering shutdown if ≥0.45 V persists for >2 µs, protecting against solder joint failures or open traces.

Does the TDA21201-S7 require external bootstrap components for high-side gate drive?

No. The TDA21201-S7 integrates a complete bootstrap charge pump and level-shifting circuitry internally. Only GND (pins 1–3), V_CC (pins 6–7), and the PWM signal (pin 5) need external connection. This eliminates discrete bootstrap diodes and capacitors, reducing layout sensitivity and component count in VRM designs.

How does the three-state input (IN pin) operate in shutdown mode?

The IN pin interprets voltages below 0.8 V as "Low" (enabling low-side FET), above 2.1 V as "High" (enabling high-side FET), and 1.2–1.6 V held for >1.5 µs as "Shutdown" - turning off both MOSFETs and reducing supply current to 10–22 mA. This mode eliminates gate charge cycling during idle, lowering no-load losses without requiring external logic.

What thermal metrics define the TDA21201-S7's cooling requirements in TO-220-7-230 package?

The TO-220-7-230 package has R_thJC = 1.9 K/W (junction-to-case) and R_thJA = 62.5 K/W (junction-to-ambient, leaded). For 30 A operation, thermal design must ensure case temperature stays below 115 °C to maintain 150 °C max junction temperature. Mounting the tab (pin 4) to a copper pour ≥6 cm² significantly improves heat dissipation in PCB layouts.