Monolithic Power Systems Inc. EV2317-J-00A

Overview

EV2317-J-00A from Monolithic Power Systems is a fully assembled evaluation board for the MP2317GJ synchronous step-down converter, configured to deliver 5V/1A output from a 7.5–26V input. It integrates the TSOT23-6 packaged IC with 10μH power inductor, input/output ceramic capacitors, feedback resistors, and supports fixed 600kHz switching in CCM mode.

For engineers reviewing the EV2317-J-00A datasheet, EV2317-J-00A pinout, EV2317-J-00A application, or EV2317-J-00A equivalent, this board enables rapid validation of MP2317-based 5V standby supplies, white goods auxiliary rails, and flat-panel display power stages under real load transients and thermal conditions.

Technical Context

The EV2317-J-00A implements a complete buck converter reference design using the MP2317GJ IC, which integrates 100mΩ high-side and 50mΩ low-side MOSFETs. It operates in continuous conduction mode at 600kHz with internal soft-start and hiccup-mode over-current protection.

Board-level features include optimized PCB layout for EMI suppression, switching-node ringing reduction circuitry, and thermal relief for the TSOT23-6 U1 package. Input ripple is filtered by parallel 0.1μF + 10μF X5R/X7R ceramics; output uses dual 22μF X5R ceramics for transient response.

Key Specifications

Availability

EV2317-J-00A is available at Aetrix Electronics and suitable for white goods auxiliary power, flat-panel TV standby rails, and industrial control system 5V logic supply designs requiring stable component supply and fast prototyping turnaround.

Supply support for EV2317-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 core expertise in DC/DC conversion, LED drivers, and motor control solutions.

The MP2317 product line targets space-constrained, cost-sensitive applications requiring high-efficiency 1A buck regulation from wide-input industrial or consumer supplies, emphasizing minimal external components and robust protection.

FAQ

What input voltage range is supported on the EV2317-J-00A board?

The board accepts 7.5V to 26V DC input, matching the MP2317GJ IC's rated operating range. Operation below 7.5V will cause undervoltage lockout; above 26V risks permanent damage to the integrated MOSFETs and input capacitors.

Can the output voltage be adjusted to 3.3V?

Yes - the board's feedback resistor divider (R2/R3 = 15kΩ each) sets 5V output. To achieve 3.3V, replace R2 with 10.2kΩ and R3 with 20.5kΩ (per MP2317 datasheet VOUT equation), maintaining total resistance near 30kΩ for bias current stability.

Does the board include thermal protection verification?

Yes - thermal shutdown is implemented via the MP2317GJ's internal sensor and verified in EVB test reports (p.3). Board operation halts when junction temperature exceeds ~150°C and resumes after cooldown, confirmed via load-step and ambient temperature sweep tests.

What is the purpose of the 10pF capacitor (C5) on the switching node?

C5 (10pF, C0G) is placed directly at the SW pin to dampen high-frequency ringing caused by parasitic inductance and MOSFET output capacitance. This reduces EMI emissions and prevents false triggering of the internal gate driver comparator.

Is the EV2317-J-00A RoHS-compliant and lead-free?

Yes - all components on the board, including the MP2317GJ IC, Murata capacitors, Yageo resistors, and Wurth inductor, are RoHS-compliant and lead-free per MPS green status documentation and manufacturer part number specifications.

How is over-current protection triggered and recovered?

OCP activates when inductor peak current exceeds ~1.5A (typical threshold), forcing hiccup mode: converter stops switching for ~30ms, then attempts restart. Recovery is automatic and self-limiting - no manual reset required - as confirmed in load transient waveforms (p.3, "OCP Recovery" plot).