MAX5056BASA+[2]

Updated: 2026-09-15

Overview

The MAX5056BASA+ is a synchronous step-down DC-DC converter manufactured by Maxim Integrated (now part of Analog Devices). It's designed for applications requiring high efficiency power conversion from a wide input voltage range to lower output voltages. The device integrates both high-side and low-side power MOSFETs, reducing external component count and board space requirements. Housed in an 8-pin SOIC package, the MAX5056BASA+ offers a compact solution for power management in space-constrained applications. Its ability to handle input voltages up to 60V makes it particularly suitable for industrial and automotive applications where voltage fluctuations are common.

Structure and Working Principle

The MAX5056BASA+ utilizes a current-mode PWM control scheme to regulate the output voltage. The integrated circuit includes a power MOSFET driver, oscillator, error amplifier, and protection circuitry. The device operates by switching the input voltage at high frequency (up to 250kHz) and filtering the output through an external LC network. Current-mode control provides inherent cycle-by-cycle current limiting and excellent transient response. The feedback pin allows for adjustable output voltage through an external resistor divider network. The device also features soft-start functionality to prevent inrush current during startup.

Key Features

The MAX5056BASA+ stands out for its wide 4.5V to 60V input voltage range, making it versatile for various power sources. It delivers up to 1.5A of continuous output current with peak efficiencies exceeding 90%. The device offers adjustable switching frequency (100kHz to 250kHz) to optimize efficiency and component size. Additional features include thermal shutdown protection, undervoltage lockout, and a power-good output signal. The integrated synchronous rectification improves efficiency compared to diode-based solutions. The device operates across a -40°C to +125°C temperature range, suitable for harsh environments.

Application Areas

The MAX5056BASA+ finds extensive use in industrial automation systems, particularly for PLCs, motor controllers, and sensor networks. Its wide input range makes it ideal for 24V and 48V industrial power systems. The converter is also popular in telecommunications equipment for powering FPGAs, ASICs, and processors. Other applications include automotive electronics (for infotainment and ADAS systems), test and measurement equipment, and distributed power architectures in server farms. The device's robustness against input voltage transients makes it suitable for applications with unreliable power sources.

Maintenance and Precautions

Proper PCB layout is critical for optimal performance of the MAX5056BASA+. Keep the high-frequency switching loops small and use a solid ground plane. Adequate thermal management is required, especially when operating at high ambient temperatures or near maximum current ratings. Input and output capacitors should be selected based on the application's ripple current requirements. Avoid operating the device near its maximum ratings for extended periods to ensure long-term reliability. Always follow the manufacturer's recommended operating conditions and derating guidelines.

B2B Procurement Guide

When sourcing the MAX5056BASA+, verify the manufacturer's part number to ensure compatibility with your design. Consider ordering evaluation boards for prototype testing. Volume pricing typically starts at quantities of 1,000 units, with lead times varying based on market conditions. For high-reliability applications, request documentation for extended temperature range operation and automotive qualification if needed. Check for counterfeit parts by purchasing through authorized distributors. Consider alternatives like the LM5116 or LT8610 for comparison in your application.