Monolithic Power Systems Inc. EV2456-J-00A

Overview

EV2456-J-00A from Monolithic Power Systems is a fully assembled and tested evaluation board for the MP2456GJ step-down DC/DC converter IC, supporting 15–50V input, delivering 12V/0.5A output with fixed 1.2MHz switching frequency, thermal shutdown, and cycle-by-cycle over-current protection in a TSOT23-6 footprint.

For engineers reviewing the EV2456-J-00A datasheet, EV2456-J-00A pinout, EV2456-J-00A application, or EV2456-J-00A equivalent, this board enables rapid validation of MP2456GJ performance in high-input-voltage industrial power metering, battery charger pre-regulation, distributed power systems, and WLED driver designs.

Technical Context

The EV2456-J-00A implements the MP2456GJ's current-mode control architecture to deliver fast transient response and stable regulation across 15–50V input range. It integrates all critical passive components-including 33μH shielded inductor (DM5028330ML), DFLS160 Schottky diode, and low-ESR ceramic capacitors (GRM32DR71C106KA01L, C3225X7S2A475K)-to support full 0.5A load at 12V output.

Board-level design enforces proper layout practices: dedicated ground planes, minimized SW node area, and optimized feedback trace routing to maintain stability with 1.2MHz operation. EN pin logic thresholds (1.35V turn-on / 1.17V turn-off) and FB reference voltage (0.812V) are directly accessible for system integration testing.

Key Specifications

Availability

EV2456-J-00A is available at Aetrix Electronics and suitable for power metering, distributed power systems, and battery charger pre-regulator applications requiring stable component supply, quick-turn evaluation, and validated reference design implementation.

Supply support for EV2456-J-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 design centers in the US, China, and Taiwan, and global manufacturing partnerships.

The MP2456 product line targets high-input-voltage DC/DC conversion in industrial, energy metering, and automotive auxiliary power applications-optimized for reliability, minimal external parts count, and robust thermal performance in TSOT23-6 packaging.

FAQ

What input voltage range does the EV2456-J-00A support?

The EV2456-J-00A supports a 15V to 50V DC input range, verified per test results with VIN = 24V nominal operation. Operation below 15V will not enable startup; above 50V risks damage to the MP2456GJ IC and board components such as the 100V-rated C1 capacitor.

How is the 12V output voltage set and adjusted?

The output voltage is set by the resistor divider R5 (27.4kΩ) and R6 (2kΩ) on the FB pin, referencing the internal 0.812V feedback threshold. VOUT = 0.812V × (1 + R5/R6); replacing R5 allows adjustment-e.g., 15.8kΩ yields 7.5V-while maintaining stability with low-ESR ceramic output capacitors.

Can the EV2456-J-00A be used to evaluate different output voltages?

Yes-the board supports adjustable output via FB resistor changes. The schematic shows R5 and R6 forming the feedback network, and the Quick Start Guide provides the formula VOUT = 0.812V × (1 + R5/R6). No PCB modification is needed; only R5 replacement is required to target other regulated outputs within MP2456GJ's capability.

What is the role of the DFLS160 diode on this board?

The DFLS160 Schottky diode serves as the freewheeling path during the MP2456GJ's off-time in non-synchronous buck operation. Its 60V rating and 1A forward current rating ensure safe recovery under worst-case 50V input transients and 0.5A load, minimizing reverse recovery losses and improving efficiency over standard PN diodes.

Does the board include thermal protection verification?

Yes-thermal shutdown is implemented by the MP2456GJ IC and verified on the EV2456-J-00A. When junction temperature exceeds ~150°C, the device halts switching and auto-restarts after cooldown. Board layout includes thermal relief on U1's exposed pad and copper pours to aid heat dissipation during sustained 0.5A operation.

Is the EN pin compatible with standard logic levels?

Yes-the EN pin accepts 3.3V or 5V CMOS/TTL logic signals. Turn-on occurs when EN ≥ 1.35V (typical), turn-off when EN ≤ 1.17V (typical), with hysteresis ensuring noise immunity. An external pull-up resistor (R1 = 1MΩ) ensures default-enable behavior if left unconnected.