Texas Instruments LM2735YMYEVAL

Overview

LM2735YMYEVAL from Texas Instruments is an evaluation board for the LM2735Y 520kHz boost DC-DC converter in 8-pin MSOP-PowerPAD package, configured to deliver 12V at up to 500mA from a 3V–5.5V input. It implements a two-layer PCB with dedicated ground plane, integrated feedback divider (R1=10.2kΩ, R2=86.6kΩ), and uses Coilcraft DO3316P-223 (22µH) and STPS120M Schottky diode.

For engineers reviewing the LM2735YMYEVAL datasheet, LM2735YMYEVAL pinout, LM2735YMYEVAL application, or LM2735YMYEVAL equivalent, this page provides verified schematic topology, measured efficiency vs. load data at 12V output, thermal layout guidance for PowerPAD grounding, and BOM-sourced component specifications including TDK C2012X5R0J226M (22µF/6.3V) and C3216X5R1E106M (10µF/25V) capacitors.

Technical Context

The LM2735YMYEVAL implements a fixed-frequency current-mode boost regulator reference design using the LM2735Y IC. It supports 3V–5.5V input, delivers regulated 12V output, and sustains 500mA continuous load with peak switch current limited to 2.1A. The board uses external compensation (C5 = 330pF) and a precision resistor divider (R1/R2) for output voltage setting.

Thermal performance relies on the MSOP-PowerPAD package's exposed DAP connected via 4–6 vias to the bottom-layer ground plane. Pin assignments follow TI's standard 8-pin MSOP-PowerPAD layout: SW (pin 7), PGND (pin 2), AGND (pin 6), EN (pin 4), and FB (pin 5) - with two NC pins (1 & 8) and dedicated power/signal ground separation.

Key Specifications

Availability

LM2735YMYEVAL is available at Aetrix Electronics and suitable for DC-DC reference design validation, power stage characterization, and boost converter training applications requiring stable component supply and documented thermal layout practices.

Supply support for LM2735YMYEVAL 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 delivering analog and embedded processing solutions, with leadership in power management ICs and evaluation platforms.

The LM2735YMYEVAL belongs to TI's DC-DC evaluation board product line, designed to accelerate development of high-efficiency boost converters for portable and space-constrained applications.

FAQ

What is the primary function of the LM2735YMYEVAL evaluation board?

The LM2735YMYEVAL evaluation board demonstrates the LM2735Y 520kHz boost converter in an 8-pin MSOP-PowerPAD package. It converts 3V–5.5V input to a regulated 12V output at up to 500mA, using a documented two-layer PCB layout with ground-plane routing, validated component selection, and measured efficiency curves. The LM2735YMYEVAL enables rapid prototyping and performance verification without custom design.

Does the LM2735YMYEVAL support adjustable output voltage?

No, the LM2735YMYEVAL is configured for fixed 12V output using R1=10.2kΩ and R2=86.6kΩ in the feedback network. While the underlying LM2735Y IC supports adjustable output via external resistors, this specific board implements only the 12V configuration per AN-1668. Modifying R1/R2 changes the output, but requires recalculating compensation and verifying stability - the LM2735YMYEVAL itself ships with fixed 12V calibration.

What thermal design features does the LM2735YMYEVAL incorporate?

The LM2735YMYEVAL uses the MSOP-PowerPAD package's exposed DAP (Die Attach Pad) connected via 4–6 vias directly to the bottom-layer ground plane. This structure lowers thermal resistance and improves power dissipation during 500mA operation. Layout guidelines emphasize tight placement of PGND (pin 2) and output capacitor ground, and proximity of the feedback bottom resistor to AGND (pin 6) - all implemented and verified on the LM2735YMYEVAL board.

Which components on the LM2735YMYEVAL are critical for EMI performance?

Critical EMI components on the LM2735YMYEVAL include the STPS120M Schottky catch diode (low forward voltage, fast recovery), the TDK C2012X5R0J226M 22µF/6.3V input capacitor (low-ESR X5R ceramic), and the Coilcraft DO3316P-223 inductor (shielded construction). Their placement - especially minimizing SW-to-GND loop area and routing VIN/CIN close to PGND - is optimized per the board's documented layout to suppress conducted and radiated noise.

Can the LM2735YMYEVAL be used with input voltages outside 3V–5.5V?

No - the LM2735YMYEVAL is validated only for 3V–5.5V input per its design and the LM2735Y IC's absolute maximum ratings. Operating outside this range risks violating the IC's VIN specification (max 6V), compromising regulation, or damaging components like the 6.3V-rated input capacitor. The LM2735YMYEVAL schematic and BOM are optimized for this window; use beyond it requires redesign and revalidation.