Infineon Technologies TDA38740A0000AUMA1

Overview

TDA38740A0000AUMA1 from Infineon is a fully integrated 40 A synchronous buck regulator with integrated OptiMOS™ power stages, PMBus interface, and fast Constant On-Time (COT) control. It operates from 4.5 V–17 V input, delivers 0.25 V–5.12 V output, supports 400 kHz–2 MHz programmable switching frequency (excluding 1600 kHz), and features monotonic soft-start, pre-bias start-up, and thermally compensated overcurrent protection. Used in server VR13/VR14 point-of-load applications.

For engineers reviewing the TDA38740A0000AUMA1 datasheet, TDA38740A0000AUMA1 pinout, TDA38740A0000AUMA1 application, or TDA38740A0000AUMA1 equivalent, key selection criteria include its 40 A continuous output current rating, PMBus telemetry (voltage/current/temperature/power), digitally programmable load-line, eight-step OCP threshold selection, and 5 mm × 6 mm PQFN package with thermal pad.

Technical Context

This device implements a fast COT control architecture with internal high- and low-side OptiMOS™ MOSFETs, eliminating external gate drivers and bootstrap components. Its PMBus v1.3-compliant interface enables real-time telemetry reporting and configuration via I²C-compatible commands, including 14-write MTP memory for user-defined settings.

The regulator integrates an internal LDO for VCC generation, differential remote sensing for ±0.5% output accuracy, and dual-mode operation (FCCM or diode emulation) selectable via pin strap or PMBus. Overcurrent protection uses thermally compensated valley-current detection with eight discrete trip thresholds (15 A to 45 A).

Key Specifications

Pinout & Package

Package: 5 mm × 6 mm PQFN-37 (exposed thermal pad), RoHS2-compliant, halogen-free, lead-free surface finish.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous buck regulator applications.

Compared with MP8772GQ-0000-Z and ISL91302BHRZ-T7A, TDA38740A0000AUMA1 uniquely combines 40 A integration, full PMBus telemetry, and on-chip load-line tuning-making it optimal for high-density, telemetry-driven server and AI infrastructure where BOM simplification and firmware-controlled power management are critical.

Availability

TDA38740A0000AUMA1 is available at Aetrix Electronics and suitable for server power delivery, AI accelerator point-of-load, and 5G baseband SoC applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TDA38740A0000AUMA1 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 AG is a German semiconductor manufacturer specializing in power management, automotive, and industrial control ICs, with leadership in silicon and SiC power devices.

The TDA38740A belongs to Infineon's OptiMOS™ iPOL family-designed specifically for high-current, digitally managed point-of-load regulation in datacenter and telecom infrastructure where PMBus telemetry, fast transient response, and thermal robustness are mandatory.

FAQ

What is the maximum supported output current and thermal derating behavior?

The TDA38740A0000AUMA1 delivers 40 A continuous output current at T_j ≤ 105 °C with adequate PCB copper (≥2 oz, 4-layer, 400 mm² thermal pad area). Above 105 °C junction temperature, current capability linearly derates to zero at 125 °C, per Figure 10 in the datasheet. Derating is implemented via internal thermal foldback-not shutdown-ensuring graceful degradation under overload.

Does this device require external compensation components?

No. The enhanced Fast COT control architecture is inherently stable with ceramic output capacitors ≥22 µF total (e.g., four 5.6 µF X5R 0805s). No external Type II/III compensation network is needed-reducing BOM count, layout area, and design iteration cycles. Stability is guaranteed across all operating conditions per datasheet Section 14.5.

How is the output voltage programmed-pin-strapped or digital?

TDA38740A0000AUMA1 supports both methods: default factory configuration uses PMBus (VOUT_COMMAND register) for full digital control, while pin-strapping via SM_ADDR/PROG and resistor networks enables fixed-voltage startup without host intervention. The "0000" suffix confirms PMBus-configurable generic part-no pin-strap defaults active at power-on.

Can the device operate with a 3.3 V input supply?

Yes-but only with external VCC bias. In single-supply mode, minimum input is 4.5 V. To operate from 3.0 V–4.5 V, an external 3.3 V or 5 V supply must be connected to the VCC pin (not shown in top-level pin list but defined in Section 14.4), enabling internal LDO operation and gate drive functionality down to 3.0 V input.