Monolithic Power Systems Inc. EV9361DJ-00A

Overview

EV9361DJ-00A from Monolithic Power Systems is a fully assembled and tested evaluation board for the MP9361DJ regulated charge pump IC, delivering a fixed 5V output at up to 110mA from 2.8V–5V input, with 30mV ripple, 1MHz (1.3MHz typical) switching frequency, and integrated over-current and short-circuit protection. It targets compact DC-DC conversion in space-constrained portable electronics.

For engineers reviewing the EV9361DJ-00A datasheet, EV9361DJ-00A pinout, EV9361DJ-00A application, or EV9361DJ-00A equivalent, this board enables rapid validation of MP9361DJ's regulated 2× charge pump performance-including soft-start behavior, enable control timing, load transient response, and thermal stability-without component-level layout or BOM sourcing.

Technical Context

The EV9361DJ-00A implements a fixed-ratio, regulated 2× charge pump topology using the MP9361DJ IC in TSOT23-6 packaging. It operates without an inductor, relying on ceramic capacitors (C1/C2 = 2.2µF, C3 = 0.47µF) for charge transfer and output filtering. The board supports external enable control via a logic-level EN pin (1.5V turn-on threshold).

Input voltage range is 2.8V to VOUT (5V), and output regulation is maintained across load currents up to 110mA. Switching frequency is factory-set at 1.3MHz (vs. nominal 1MHz), minimizing EMI while enabling small external capacitor selection. Internal soft-start limits in-rush current during startup and mode transitions.

Key Specifications

Availability

EV9361DJ-00A is available at Aetrix Electronics and suitable for LED backlight evaluation, camera flash circuit validation, and LCD display supply design requiring stable component supply and fast time-to-test capability.

Supply support for EV9361DJ-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 core expertise in DC-DC conversion, LED drivers, and motor control solutions.

The EV9361DJ-00A belongs to MPS's evaluation board product line, designed specifically to accelerate adoption of their regulated charge pump ICs in portable and battery-powered applications where inductor-free, low-noise, compact power conversion is critical.

FAQ

What input voltage range does the EV9361DJ-00A support?

The board accepts 2.8V to 5V DC input, matching the operating range of the MP9361DJ IC. This aligns with discharged states of single-cell lithium batteries and standard 3.3V/5V system rails. Input must be clean and current-limited to avoid triggering over-current protection during startup.

How is the enable function implemented on this board?

The EN pin (JP3 Pin 1) accepts TTL/CMOS logic: ≥1.5V enables the converter; ≤0.4V disables it. No pull-up or pull-down resistors are populated by default, so external control must drive the pin directly. The board includes no level-shifting circuitry-interface voltage must match the MP9361DJ's logic thresholds.

Can the output voltage be adjusted?

No-the MP9361DJ is a fixed 5V output device, and the EV9361DJ-00A has no feedback resistor network or trim option. Output regulation is internal and non-programmable. For adjustable outputs, engineers should evaluate MPQ series or other programmable charge pumps from MPS.

What capacitors are used for charge pumping and output filtering?

C1 and C2 (2.2µF, X5R, 10V, 0805) serve as flying and input capacitors; C3 (0.47µF, X7R, 25V, 0805) is the output filter capacitor. All are surface-mount ceramics selected for low ESR and stable capacitance across temperature and bias voltage.

Does the board include thermal monitoring or over-temperature protection?

No-thermal shutdown is internal to the MP9361DJ IC but not externally monitored or signaled on the board. The TSOT23-6 package relies on PCB copper area for heat dissipation. Users should verify board temperature rise under 110mA load using IR imaging or thermocouple measurement.

Is there a schematic and layout available for reference design reuse?

Yes-the official EV9361DJ-00A Rev. 1.0 documentation includes full schematic (page 2), BOM (page 2), top/bottom PCB layer drawings (page 3), and silk screen layout. These files are published on Monolithic Power Systems' website and may be used for derivative board development under standard license terms.