Monolithic Power Systems Inc. EV4569-N-00A

Overview

EV4569-N-00A from Monolithic Power Systems is an evaluation board for the MPQ4569GN synchronous step-down converter IC, designed to validate 3.3V/0.3A power delivery from 4.5–75V input in automotive and industrial environments. It integrates high-side/low-side MOSFETs in SOIC-8 EP, delivers 5μA shutdown current, supports programmable soft-start, and features ±1% FB tolerance at room temperature.

For engineers reviewing the EV4569-N-00A datasheet, EV4569-N-00A pinout, EV4569-N-00A application, or EV4569-N-00A equivalent, this board enables rapid validation of high-voltage buck conversion with AEC-Q100 Grade 1 compliance, light-load frequency scaling, and adjustable output voltage via external resistor divider.

Technical Context

The EV4569-N-00A implements a fixed-frequency (typ. 500 kHz) current-mode synchronous buck topology using the MPQ4569GN controller IC. It operates across –40°C to +125°C ambient, supports EN-controlled startup with 1.55V turn-on threshold, and uses internal zener clamping (6.5V) on the EN pin for safe biasing from VIN.

Board-level design includes 33µH shielded inductor (CLF7045T-330M-H), dual 22µF/16V ceramic output capacitors, 4.7µF/100V input bulk caps, and precision feedback resistors (R5 = 510kΩ, R7 = 1.2MΩ) setting VOUT = 3.3V with 1V reference.

Key Specifications

Availability

EV4569-N-00A is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC power supplies, distributed sensor node regulators, and battery-backed telematics systems requiring stable component supply and AEC-Q100-compliant validation hardware.

Supply support for EV4569-N-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, motor drivers, and LED lighting controllers.

The MPQ4569GN product line targets high-input-voltage buck regulation in harsh environments; the EV4569-N-00A evaluation board was developed to accelerate design-in of this AEC-Q100 Grade 1 synchronous converter for automotive and industrial power systems.

FAQ

What input voltage range does the EV4569-N-00A support?

The board accepts 4.5 V to 75 V DC input, enabling direct connection to 12 V, 24 V, and 48 V automotive battery systems-including transient conditions like cold crank (down to 4.5 V) and load dump (up to 75 V). Input filtering uses dual 4.7 µF/100 V X7S ceramics in parallel.

How is output voltage adjusted on this evaluation board?

VOUT is set to 3.3 V by default using R5 = 510 kΩ and R7 = 1.2 MΩ, forming a resistor divider that references the MPQ4569GN's 1.0 V FB pin. To change output voltage, replace R5 per the formula R5 = (VOUT − 1 V) × 1.2 MΩ; R7 remains fixed at 1.2 MΩ.

Does the EV4569-N-00A support enable control, and what are the logic thresholds?

Yes - the EN pin accepts digital control: drive above 1.55 V to enable regulation, below 1.2 V to disable. An internal 3 MΩ pull-down ensures safe shutdown when floating. The EN pin includes a 6.5 V zener clamp, allowing direct connection from VIN via a high-value resistor if no logic signal is available.

What is the purpose of the BIAS pin, and how is it connected?

The BIAS pin supplies internal circuitry with a regulated voltage derived from VOUT. On this board, it is directly tied to the 3.3 V output rail through a 0 Ω jumper (R3), ensuring optimal gate driver performance and efficiency. No external capacitor is required due to integrated bias regulation.

Can the EV4569-N-00A be used for output voltages other than 3.3 V?

Yes - the board supports adjustable output via the FB resistor divider. For non-3.3 V outputs, recalculate R5 using the formula provided in the MPQ4569GN datasheet, and verify inductor saturation current and output capacitor ripple rating. Application Note AN-107 details layout and component selection guidelines for alternate VOUT settings.

Is thermal performance characterized on this evaluation board?

Yes - the board uses SOIC-8 EP packaging with exposed pad soldered to a 2-layer 2 oz copper PCB thermal pad. At 0.3 A output and 12 V input, typical junction temperature rise is <25°C above ambient. Full thermal data, including derating curves vs. airflow and ambient, is provided in the MPQ4569GN datasheet Section 8.2.