Infineon Technologies TDA21462AUMA1

Overview

TDA21462AUMA1 from Infineon Technologies is a co-packaged OptiMOS™ power stage integrating synchronous buck gate driver, high-side and low-side MOSFETs, and Schottky diode in a single 5 mm × 6 mm PQFN package. It delivers up to 70 A output current, supports input voltage from 4.25 V to 16 V, operates at switching frequencies up to 1.5 MHz, and provides on-chip 5 mV/A current sensing with temperature compensation for CPU core power delivery in server applications.

For engineers reviewing the TDA21462AUMA1 datasheet, TDA21462AUMA1 pinout, TDA21462AUMA1 application, or TDA21462AUMA1 equivalent, key selection criteria include its integrated current sense accuracy (±0.8 A offset), deep-sleep mode for PS3/PS4 power states, bootstrap auto-replenishment, body-braking transient support, and compatibility with 3.3-V tri-state PWM control interfaces.

Technical Context

The TDA21462AUMA1 implements a synchronous buck topology with internal gate driver logic that enforces anti-shoot-through timing between high-side and low-side MOSFETs. Its phase-fault detection monitors HS FET short conditions via PHASE node monitoring, while cycle-by-cycle over-current protection uses programmable OCSET resistor biasing to set thresholds from fixed 80 A down to lower values.

Current sensing relies on R_DS(on)-based emulation referenced to REFIN (1.1–2.0 V), delivering 5 mV/A output at IOUT with ±0.8 A offset trim. Temperature reporting is analog: TOUT outputs 8 mV/°C + 0.6 V, enabling real-time junction monitoring and thermal shutdown at 150 °C.

Key Specifications

Pinout & Package

Package: 40-pin PQFN (5 mm × 6 mm × 1 mm), RoHS-compliant, exposed thermal pad (Pin 24) for direct PCB thermal coupling.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ISL99390HRZ-T and MP86957DQKT-Z, the TDA21462AUMA1 uniquely integrates temperature-proportional analog output, deep-sleep IQ <0.2 µA, and VOS-based body braking-enabling tighter thermal control, longer battery life in edge systems, and reduced output capacitance in high-transient applications.

Availability

TDA21462AUMA1 is available at Aetrix Electronics and suitable for server CPU core power, AI accelerator GPU supply, and DDR5 memory subsystems requiring stable component supply, long-lifecycle availability, and validated thermal performance under sustained 70-A loads.

Supply support for TDA21462AUMA1 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 MCUs, and RF solutions, with global manufacturing and quality certification to ISO/TS 16949 and IATF 16949.

The TDA21462AUMA1 belongs to Infineon's OptiMOS™ Power Stage product line, engineered specifically for high-efficiency, high-density CPU/GPU/DDR power delivery in datacenter and AI infrastructure where thermal headroom, transient response, and current-sense fidelity are critical.

FAQ

What is the recommended bootstrap capacitor value and placement for TDA21462AUMA1?

A minimum 0.22 µF X7R ceramic capacitor must be placed directly between BOOT and PHASE pins. For VIN > 13.2 V, a 2 Ω resistor must be added in series with the capacitor to limit inrush current. Layout requires shortest possible trace length and direct connection to the thermal pad ground plane to minimize ringing and ensure reliable high-side gate drive.

How does the TDA21462AUMA1 implement body-braking during load transients?

Body-braking is enabled via the VOS pin, which connects to the converter output. When load drops rapidly, the controller drives VOS low, activating internal circuitry that turns on the low-side MOSFET to actively sink inductor current. This prevents output voltage overshoot without requiring external Schottky clamps or complex controller firmware.

Can the TDA21462AUMA1 operate with a 12-V input and 0.8-V output at 1.5-MHz switching frequency?

Yes. The device supports VIN from 4.25 V to 16 V and VOUT from 0.25 V to 5.5 V. At 1.5 MHz, it maintains >90% efficiency at 0.8 V/40 A with appropriate external components (e.g., 0.33 µH inductor, 220 µF total output capacitance), verified in Infineon's reference design RD-TDA21462-1.5MHz.

What is the function of the REFIN pin and how should it be biased?

REFIN serves as the reference voltage for the IOUT current sense amplifier. It must be tied to a stable 1.1–2.0 V source-typically the bias rail from a compatible PWM controller (e.g., ISL68127). No additional decoupling is required, as the internal amplifier is designed to reject noise from standard controller reference outputs.