Monolithic Power Systems Inc. EV3432-L-00A

Overview

EV3432-L-00A from Monolithic Power Systems is an evaluation board designed to demonstrate the MP3432 synchronous boost converter IC, a 600kHz fixed-frequency, wide-input (2.7V–13V), high-efficiency DC-DC converter supporting up to 30W average load power from single-cell batteries. It delivers 9V/3.5A output with programmable peak current limit (14A), selectable PSM/FCCM/USM light-load modes, and integrated 6.5mΩ/10mΩ MOSFETs in a 3mm×4mm QFN-13 package - used for quick-charger power banks and portable POS systems.

For engineers reviewing the EV3432-L-00A datasheet, EV3432-L-00A pinout, EV3432-L-00A application, or EV3432-L-00A equivalent, this page provides verified board-level specifications, test-conditioned efficiency curves, mode-selection jumper configuration (J1), external soft-start and compensation interface, and measured transient response under USM/PSM/FCCM operation - all validated per Rev.1.0 test report dated March 2019.

Technical Context

The EV3432-L-00A implements the MP3432's constant-off-time (COT) control architecture with adaptive loop response, enabling fast load-transient recovery (<400μs for 0→1.75A step) and stable regulation across input voltages from 3V to 8.4V. Its PCB layout integrates critical passive components including a 1.5μH/19A inductor (Sumida 104CDMCCDS-1R5MC-ND) and six 22μF X5R ceramic output capacitors (Murata GRM32ER61E226KE15L).

Mode selection is hardware-configured via J1: pins 1–2 enable FCCM, 2–3 select PSM, and floating pin 2 activates USM (>23kHz). The board supports auto pass-through in PSM when VIN exceeds VOUT-set, and features programmable UVLO (via R5/R6), thermal shutdown at 150°C, and external soft-start timing controlled by C3 (4.7μF).

Key Specifications

Availability

EV3432-L-00A is available at Aetrix Electronics and suitable for notebook power subsystem validation, Bluetooth speaker battery-boost reference design, portable POS system voltage rail generation, and quick-charger power bank development requiring stable component supply and repeatable lab characterization.

Supply support for EV3432-L-00A 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

Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance analog and power ICs, with over two decades of expertise in DC-DC conversion, motor drivers, and LED lighting controllers.

The EV3432-L-00A belongs to MPS's evaluation board product line, engineered specifically to accelerate design-in of the MP3432 boost converter for battery-powered portable applications demanding high efficiency, small solution size, and robust light-load behavior.

FAQ

How do I change the output voltage on the EV3432-L-00A?

The output voltage is set by the FB resistor divider (R1 and R2). With R1 = 750kΩ and VFB = 1V, VOUT = 1V × (1 + 750kΩ / R2). To adjust, replace R2: for example, R2 = 100kΩ yields ~8.5V. Ensure R2 tolerance is ≤1% and use stable film resistors to maintain regulation accuracy across temperature.

What are the jumper settings for PSM, FCCM, and USM modes?

J1 controls operating mode: short pins 1–2 for FCCM (forced continuous conduction), pins 2–3 for PSM (pulse-skipping), and leave pin 2 unconnected (floating) for USM (ultra-sound mode >23kHz). Mode selection takes effect immediately after power-up and is confirmed by switching waveform observation on SW pin.

Does the EV3432-L-00A support auto pass-through functionality?

Yes - only in PSM mode. When VIN rises above VOUT-set (e.g., >9.5V for 9V output), the MP3432 automatically enters pass-through, disabling switching and connecting VIN directly to VOUT through the internal low-side MOSFET. This reduces quiescent current and improves efficiency during high-input conditions.

What is the maximum supported load power and thermal performance?

The board sustains 30W average load (9V/3.5A) continuously at TA = 25°C. Case temperature rise reaches ~40°C at full load with 3.3V input, per test data. For sustained >30W or higher ambient temperatures, forced airflow or heatsinking on U1's exposed pad is recommended to maintain safe junction temperature below 125°C.

Can I use a different inductor than the stock 1.5μH part?

Yes - but inductance must remain within 1.2–1.8μH, with DC resistance ≤4mΩ and saturation current ≥19A. The Sumida 104CDMCCDS-1R5MC-ND was selected for its low DCR and thermal stability. Substituting with higher-DCR or lower-Isat parts degrades efficiency, increases thermal stress, and may trigger premature current-limit protection.

How is input undervoltage lockout (UVLO) configured on this board?

UVLO threshold and hysteresis are set by R5 (130kΩ) and R6 (20kΩ) on the EN pin. Default configuration enables startup at ~2.7V and disables below ~2.4V (≈300mV hysteresis). Adjusting R5/R6 changes thresholds per MP3432's EN pin transfer function - refer to Figure 12 in the MP3432 datasheet for calculation.

Is the EV3432-L-00A RoHS-compliant and lead-free?

Yes - all components on the board, including the MP3432GL IC, Murata capacitors, Royal resistors, and Sumida inductor, are lead-free, halogen-free, and fully compliant with the EU RoHS Directive. MPS confirms green status for this part on its Quality Assurance portal.