Texas Instruments TPSM861253EVM

Overview

TPSM861253EVM from Texas Instruments is a fully assembled and tested evaluation module designed to characterize the TPSM861253 synchronous buck converter module - a fixed 3.3-V, 1-A output, D-CAP3™-controlled DC/DC step-down solution operating from 3.8 V to 17 V input. It supports fast transient response, FCCM light-load operation, and delivers ≤13 mV_PP output ripple at 1 A load with 1.4 MHz switching frequency.

For engineers reviewing the TPSM861253EVM datasheet, TPSM861253EVM board layout, TPSM861253EVM test setup, or TPSM861253EVM performance validation, this module provides direct access to key power-conversion metrics including efficiency (up to 92% at 12 V_IN/3.3 V_OUT), load regulation (±0.4%), line regulation (±0.4%), and startup/shutdown timing under controlled conditions.

Technical Context

The TPSM861253EVM implements the TPSM861253 - a monolithic QFN-packaged buck module integrating high-side and low-side MOSFETs, gate drivers, and D-CAP3™ adaptive on-time control. Its fixed 3.3-V output eliminates external feedback resistors, simplifying design while maintaining fast transient response without external compensation.

Input voltage range is 3.8 V to 17 V; output current capability is 0 A to 1 A continuous; switching frequency is internally set to 1.4 MHz. The board includes dedicated test points (TP1–TP10) for VIN, VOUT, EN, PGOOD, switch node, and loop response measurement - enabling full characterization of stability, ripple, and dynamic behavior.

Key Specifications

Availability

TPSM861253EVM is available at Aetrix Electronics and suitable for power supply validation, DC/DC topology benchmarking, and embedded system integration requiring stable component supply, rapid prototyping support, and traceable evaluation hardware sourcing.

Supply support for TPSM861253EVM 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

Texas Instruments is a global semiconductor company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and communications markets.

The TPSM861253EVM belongs to TI's power management evaluation module portfolio, engineered specifically to accelerate adoption of integrated buck modules by providing production-ready reference designs, validated schematics, and complete PCB layout files.

FAQ

What is the purpose of the TPSM861253EVM?

The TPSM861253EVM is an evaluation module built to demonstrate and validate the performance of the TPSM861253 synchronous buck converter module. It enables engineers to measure efficiency, ripple, transient response, startup/shutdown behavior, and regulation accuracy under real-world conditions - without designing custom hardware. The TPSM861253EVM includes all necessary components, test points, and documentation to support rapid power stage evaluation.

Does the TPSM861253EVM support adjustable output voltage?

No - the TPSM861253EVM is configured for fixed 3.3 V output, matching the TPSM861253 IC's internal feedback network. Unlike the TPSM861252EVM or TPSM861257EVM, it does not include R5/R6 resistor pads for output voltage adjustment. This fixed configuration ensures consistent, repeatable testing of the 3.3 V variant and eliminates tuning variables during characterization.

What input voltage range is validated for the TPSM861253EVM?

The TPSM861253EVM is validated for input voltages from 3.8 V to 17 V, as specified in Table 1-1 of the SLUUCY0A user's guide. Testing at 5 V, 12 V, and 17 V confirms stable operation across common industrial and server supply rails. Input below 3.8 V may prevent startup due to undervoltage lockout in the TPSM861253 IC.

How is the TPSM861253EVM powered and loaded?

The TPSM861253EVM uses terminal blocks J1 (VIN) and J2 (VOUT) for power input and load connection, respectively. A 20-AWG wire pair is recommended for both to minimize voltage drop and ensure accurate measurements up to 1 A. TP1/TP2 monitor input voltage and ground; TP3/TP4 monitor output voltage and ground - enabling oscilloscope probing without soldering.

Can the TPSM861253EVM be used for loop stability analysis?

Yes - the TPSM861253EVM includes TP8, a dedicated test point for loop response measurements, and supports standard injection methods using a network analyzer or Bode 100. The board's layout preserves signal integrity at the feedback node, and its D-CAP3™ control architecture eliminates external compensation components - simplifying stability verification across line and load conditions.