Texas Instruments LM3263EVM

Overview

LM3263EVM from Texas Instruments is an evaluation module for the LM3263 step-down DC-DC converter, designed to power multimode 2G/3G/4G RF power amplifiers from a single Li-ion cell (2.7V–5.5V input). It supports dynamically programmable output voltage (0.4V–3.6V) via RFFE digital interface and delivers up to 2.5A output current with integrated DSBGA-16 converter U1 (LM3263TM).

For engineers reviewing the LM3263EVM datasheet, LM3263EVM pinout, LM3263EVM application, or LM3263EVM equivalent, this module enables rapid validation of RFFE-controlled PA supply sequencing, VOUT fine-tuning (15 mV/30 mV steps), GUI-based register configuration, and integration with LM8335EVM for USB-hosted RFFE communication.

Technical Context

The LM3263EVM implements a synchronous buck converter topology with internal PFET/NFET switches, optimized for RF PA efficiency across varying output power levels. It interfaces exclusively via the MIPI RFFE standard - using SCLK, SDATA, and VIO pins - and requires external 1.5 µH inductor and 10 µF input/output bulk capacitors per TI SNOU106 design.

Operation relies on dual-voltage domain support: SVDD (analog supply), PVIN (power input), and VIO (RFFE interface reference & enable). Feedback is closed via FB pin connected to output filter capacitor, while ACB and PACB pins provide analog bypass paths critical for RF noise suppression in PA biasing applications.

Key Specifications

Availability

LM3263EVM is available at Aetrix Electronics and suitable for RF front-end development, multimode PA power validation, and RFFE protocol interoperability testing requiring stable component supply and full evaluation infrastructure.

Supply support for LM3263EVM 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 specializing in analog, embedded processing, and connectivity technologies with over 90 years of innovation in power management and RF solutions.

The LM3263EVM belongs to TI's RF Power Management Evaluation Module family, engineered specifically to accelerate development of RFFE-controlled PA supply systems in 4G/LTE and 5G NR mobile infrastructure and handset designs.

FAQ

What is the primary function of the LM3263EVM?

The LM3263EVM is a hardware evaluation platform for the LM3263 DC-DC converter IC, enabling engineers to validate dynamic PA voltage control, RFFE interface timing, and system-level power sequencing. It provides physical access to all LM3263TM pins, onboard filtering components, and standardized ribbon-cable connectivity to the LM8335EVM host interface - making LM3263EVM essential for RF front-end bring-up and compliance testing.

How does the LM3263EVM connect to a host system?

The LM3263EVM connects to a PC via the LM8335EVM using a 20-pin ribbon cable that maps VIO, SCLK, SDATA, and GND signals. The LM8335EVM acts as a USB-to-RFFE bridge, translating PC commands into MIPI RFFE frames. VBATT is supplied externally (2.7V–5.5V), and load is connected via banana jacks - ensuring LM3263EVM operates as a complete, self-contained evaluation node without custom firmware or drivers.

What output voltage resolution does the LM3263EVM support?

The LM3263EVM supports two programmable output voltage resolutions: 30 mV steps (via REGISTER_0, VSET[7:1]) and 15 mV steps (via REGISTER_03h, VSET[7:0]), enabling precise VCC_PA tuning across 0.4V–3.6V. This resolution is implemented directly by the LM3263TM IC on the LM3263EVM board and verified through the LM3263 GUI software - allowing engineers to optimize PA efficiency at specific POUT levels without hardware changes.

Does the LM3263EVM require external components to operate?

No - the LM3263EVM is fully populated with all required passive components: 1.5 µH power inductor (L1), 10 µF input/output bulk capacitors (C4/C5), 4.7 µF and three 1.0 µF decoupling capacitors (C7/C8/C10/C12), plus 3.3 nF ACB capacitor (C3). Only external VBATT (2.7V–5.5V) and a load (PA or resistor) are needed to operate LM3263EVM out-of-box, per TI User's Guide SNOU106.

Can the LM3263EVM be used without the LM8335EVM?

No - the LM3263EVM lacks native USB or UART interface and depends entirely on the LM8335EVM for RFFE command translation and power delivery to VIO. The 20-pin connector on LM3263EVM is designed exclusively for mating with LM8335EVM's ribbon cable; no alternative RFFE master (e.g., baseband processor) is supported on this evaluation module. Thus, LM3263EVM functionality is inseparable from LM8335EVM in the TI evaluation ecosystem.