Infineon Technologies TDM3883XUMA1

Overview

TDM3883XUMA1 from Infineon Technologies is a fully integrated 3 A synchronous buck DC-DC voltage regulator module with embedded 0.82 µH inductor, operating from 4.5 V to 14 V input and delivering 0.5 V to 5.0 V output with ±1.0% reference accuracy, 800 kHz fixed switching frequency, and 10 µA shutdown current. It serves as a point-of-load (POL) power solution in space-constrained server and telecom applications.

For engineers reviewing the TDM3883XUMA1 datasheet, TDM3883XUMA1 pinout, TDM3883XUMA1 application, or TDM3883XUMA1 equivalent, key selection criteria include its integrated inductor, Enhanced Stability IPOL engine eliminating external compensation, FCCM/DEM mode control via En/FCCM pin, and thermally compensated over-current protection with three user-selectable thresholds.

Technical Context

The TDM3883XUMA1 implements an adaptive on-time PWM controller with pseudo-constant 800 kHz switching, enabling fast transient response without loop compensation. Its IPOL architecture integrates MOSFETs, driver, LDO bias generator, and 0.82 µH inductor in a single PG-LGA-15 package.

It supports dual operation modes: Forced Continuous Conduction Mode (FCCM) for low-noise applications and Diode Emulation Mode (DEM) for light-load efficiency, with pre-bias startup, soft-start ramp (0.2 mV/µs), and open-drain Power Good signaling referenced to FB voltage thresholds (80–95% of VFB).

Key Specifications

Pinout & Package

Package: PG-LGA-15-1, 2.7 mm × 3.1 mm × 2.3 mm micro-module with exposed thermal pad. Pin numbering follows transparent top-view layout per Figure 3 of Infineon's TDM3883 datasheet (V2.2, 2022-07-11).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS543B20RTWR and MIC45112YMT-TZ, the TDM3883XUMA1 uniquely combines 3 A capability, 4.5–14 V input, integrated 0.82 µH inductor, and industrial temperature qualification in a 2.7 × 3.1 mm footprint-making it optimal for compute and infrastructure POL where size, integration, and ruggedness are co-prioritized.

Availability

TDM3883XUMA1 is available at Aetrix Electronics and suitable for server and computing, communications infrastructure, and industrial PLC applications requiring stable component supply, long-term lifecycle support, and RoHS6-compliant manufacturing.

Supply support for TDM3883XUMA1 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 global R&D and manufacturing infrastructure.

The TDM3883 belongs to Infineon's IPOL (Integrated POL) product line, designed specifically for high-density, low-profile point-of-load regulation in datacenter, telecom, and industrial systems where board space and thermal performance are critical constraints.

FAQ

What is the recommended input capacitor configuration for TDM3883XUMA1?

A minimum 22 µF X5R/X7R ceramic capacitor rated ≥16 V must be placed within 2 mm of PVin and PGND pins. A second 1 µF capacitor should be added adjacent to the BOOST–SW path. Total effective capacitance must exceed 30 µF with ESR <10 mΩ to ensure stable operation across 4.5–14 V input range and suppress high-frequency ringing.

How does the OCSET pin configure over-current protection thresholds?

OCSET supports three discrete OCP levels: grounding selects 4.0–5.5 A, floating selects 3.2–4.3 A, and connecting to Vcc selects 2.3–3.2 A. These thresholds are thermally compensated and apply across –40 °C to +125 °C. The setting is latched during startup and remains active until power cycle.

Can TDM3883XUMA1 operate without an external feedback resistor divider?

No. The FB pin requires a resistor divider between Vout and AGND to set output voltage using the internal 0.5 V reference. For example, 0.5 V output uses direct connection; 1.2 V output requires R1 = 14.7 kΩ and R2 = 10 kΩ. The Vo pin must be shorted to Vout for proper on-time calibration and transient response.

Is the PG (Power Good) signal asserted before or after soft-start completion?

PG is asserted only after soft-start completes and FB voltage reaches 90% of target (upper threshold), then remains high as long as FB stays between 80% and 95% of target. It deasserts within 5 µs if output drops below lower threshold, providing precise rail monitoring for system sequencing without external supervision circuits.