Monolithic Power Systems Inc. EV3416-QH-00B

Overview

EV3416-QH-00B from Monolithic Power Systems is an evaluation board for the MP3416GQH-Z synchronous step-up converter IC, supporting 0.86V–5.5V input, delivering fixed 3.3V output at up to 1.1A switching current, with 9.5μA quiescent current and <0.65μA shutdown current-designed for battery-powered medical devices and remote controls.

For engineers reviewing the EV3416-QH-00B datasheet, EV3416-QH-00B pinout, EV3416-QH-00B application, or EV3416-QH-00B equivalent, this board enables rapid validation of low-I_Q boost performance, output disconnect behavior, pulse-skip mode efficiency, and enable-controlled startup in space-constrained portable systems.

Technical Context

The EV3416-QH-00B implements the MP3416GQH-Z IC in a QFN-8 (1.5mm × 2mm) package, featuring peak-current-mode control, internal synchronous P-channel rectifier, and programmable low-battery detection via LBI/LBO pins. It supports down-mode operation when V_IN > V_OUT.

Board-level design includes a 3.3µH power inductor (MPS MPL-AL5030-3R3), 10µF/22µF ceramic output capacitors, and resistor-divider network (R1=1MΩ, R2=178kΩ) setting V_OUT = 3.3V using 0.504V feedback reference.

Key Specifications

Availability

EV3416-QH-00B is available at Aetrix Electronics and suitable for medical diagnostics, handheld computing, and remote control development requiring stable component supply, verified reference designs, and fast-turn evaluation support.

Supply support for EV3416-QH-00B 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 power management ICs, with over two decades of innovation in DC-DC conversion, motor drivers, and LED lighting controllers.

The MP3416 product line delivers ultra-low-quiescent-current boost converters for energy-sensitive portable electronics, emphasizing shutdown isolation, small-footprint integration, and robust light-load efficiency.

FAQ

What input voltage range does the EV3416-QH-00B support?

The board accepts 0.86V to 5.5V DC input, validated for startup at ≥1.25V. This range supports single-cell lithium (2.5–4.2V), NiMH (0.9–1.4V/cell), and alkaline (0.8–1.6V/cell) sources without external pre-regulation.

Can the output voltage be adjusted, and how?

Yes-V_OUT is set by the R1/R2 resistor divider per V_OUT = V_FB × (1 + R1/R2), where V_FB = 0.504V. With R1 = 1MΩ and R2 = 178kΩ, it delivers 3.3V. Swapping R2 allows adjustment across 1.8V–5.5V per MP3416 specifications.

Does the board demonstrate output disconnect during shutdown?

Yes-the MP3416 IC internally disconnects V_OUT from V_IN when EN is pulled low, reducing leakage to <0.65μA. This is verified on the EV3416-QH-00B via open-circuit V_OUT measurement under shutdown conditions.

What inductor is used, and why is it critical?

The board uses MPS MPL-AL5030-3R3 (3.3µH, 6A I_SAT, 21mΩ DCR). Its low DCR and high saturation current minimize conduction loss and prevent inductor saturation at 1.1A peak switch current, directly enabling full-load efficiency and thermal stability.

Is thermal shutdown implemented, and at what temperature?

Yes-the MP3416 integrates OTP with thermal shutdown triggered at 155°C. On the EV3416-QH-00B, this protects against sustained overload or poor airflow; recovery occurs automatically after cooldown below hysteresis threshold.

How is low-battery detection configured on this board?

LBI and LBO pins are routed to test points. LBI senses input voltage via external resistor divider; LBO asserts open-drain low when V_IN drops below threshold. Default configuration supports user-defined cutoff (e.g., 2.8V for Li-ion depletion warning).