Infineon Technologies TDA21590AUMA1

Overview

TDA21590AUMA1 from Infineon Technologies is a 90 A integrated power-stage IC for synchronous buck DC-DC conversion, featuring co-packaged gate driver, control MOSFET (Q1), synchronous MOSFET (Q2), and active diode structure. It delivers 0.225–5.5 V output across 4.25–16 V input, operates up to 1.5 MHz, and provides on-chip current sensing at 5 µA/A with 8 mV/°C analog temperature reporting - deployed in high-density CPU/GPU VRMs and DDR memory power delivery.

For engineers reviewing the TDA21590AUMA1 datasheet, TDA21590AUMA1 pinout, TDA21590AUMA1 application, or TDA21590AUMA1 equivalent, key selection criteria include its 5 mm × 6 mm PQFN package, tri-state 3.3 V PWM interface, body-braking™ transient support, DEEP SLEEP mode (32 µA), and integrated fault flags for HSS, OCP, BOOT UV, and thermal shutdown.

Technical Context

The TDA21590AUMA1 implements a monolithic synchronous buck power stage with internal MOSFET current sensing and analog temperature monitoring. Its architecture integrates a low-quiescent-current gate driver, active diode structure (low V_SD, minimal Q_rr), and bootstrap capacitor auto-replenishment logic - enabling stable operation at 1.5 MHz switching frequency while minimizing switch-node ringing.

It supports tri-state PWM control (High = Q1 on, Tri-state = both off, Low = Q2 on), features VDRV and VCC supply rails (4.25–5.5 V), and delivers real-time diagnostics via IMON (5 µA/A), TMON (8 mV/°C + 0.6 V offset), and FAULT flag assertion on overtemperature, cycle-by-cycle overcurrent, high-side short, or bootstrap under-voltage.

Key Specifications

Pinout & Package

Package: 43-pin PQFN (5 mm × 6 mm × 0.9 mm), RoHS-compliant, with exposed thermal pad (pins 25–30 VIN, 5/8/9/20–24/37 PGND, 2 AGND).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-current synchronous buck power stage applications.

Compared with ISL99390HRZ-T and TDA21472AUMA1, the TDA21590AUMA1 uniquely combines 90 A capability, on-die active diode, Body-Braking™, and dual-function TMON/FAULT - delivering higher efficiency at light loads, faster transient recovery, and simplified system-level diagnostics in space-constrained VRMs.

Availability

TDA21590AUMA1 is available at Aetrix Electronics and suitable for server CPU core VRMs, AI accelerator GPU power supplies, and DDR5 memory VDDQ regulators requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for TDA21590AUMA1 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 carbide and OptiMOS™ power devices.

The TDA21590AUMA1 belongs to Infineon's OptiMOSTM Power Stage product line, engineered specifically for high-frequency, high-current CPU/GPU/DDR power delivery in datacenter and AI hardware - emphasizing integration, thermal performance, and real-time fault visibility.

FAQ

What is the recommended bootstrap capacitor value and placement for TDA21590AUMA1?

The datasheet specifies a 0.47 µF X7R ceramic capacitor between BOOT (pin 33) and PHASE (pin 32), placed as close as possible to the pins with minimal loop area. For VIN > 13.2 V, a 2 Ω resistor must be added in series with the capacitor to suppress SW ringing and EMI - this is mandatory per layout guidelines and directly impacts gate-drive reliability.

How does the IMON current sense output interface with a controller?

IMON (pin 38) and IMONREF (pin 39) form a differential current-sense output referenced to system ground. A single 1 kΩ resistor between them produces a voltage proportional to output current (5 µA/A × 1 kΩ = 5 mV/A). The controller reads this voltage to implement closed-loop current limiting, phase balancing, or telemetry - no calibration is required due to factory-trimmed gain.

Does TDA21590AUMA1 support multiphase synchronization?

Yes - the TDA21590AUMA1 accepts externally generated tri-state PWM signals and does not generate its own clock. When used with a multiphase controller (e.g., ISL68228, IR35221), it synchronizes seamlessly to the controller's phase clock and PWM timing, enabling interleaved operation across multiple TDA21590AUMA1 units without additional timing circuitry.

What thermal derating applies above 125°C junction temperature?

The device incorporates overtemperature protection (OTP) that triggers thermal shutdown at TJ ≥ 150°C (absolute max), but its recommended operating range is −40°C to +125°C. Above 125°C, output current must be reduced per the thermal resistance data: θ_{JC_PCB} = 1.5 K/W means ~15°C rise per 10 A at typical PCB copper mass - sustained operation above 125°C requires active derating or enhanced cooling to avoid OTP activation.