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High-Efficiency, 3A, Step-Down Switching Regulator with Tracking Feature

Smallest, Most Efficient 3A Solution in the Market with Tracking Input

Product Details

Key Features

Simplified Block Diagram

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Key Features

  • Internal 30mΩ (typ) RDS(ON) High-Side and 18mΩ (typ) Low-Side MOSFETs at 5V
  • Continuous 3A Output Current Over Temperature
  • 96% Efficiency with 3.3V Output at 3A
  • ±1% Output Voltage Accuracy Over Load, Line, and Temperature
  • Operates from 2.7V to 5.5V Supply
  • Cycle-by-Cycle Overcurrent Protection
  • Adjustable Output from 0.6V to Up to 0.94 x VIN
  • Factory-Trimmed, 1MHz Switching Frequency
  • Stable with Low-ESR Ceramic Output Capacitors
  • Safe-Startup Into Prebiased Output (Used for Power Tracking)
  • External Reference Input for Tracking During Power-Up/Power-Down
  • Skip-Mode Functionality
  • Enable Input/Power-Good Output
  • Fully Protected Against Overcurrent and Overtemperature
  • Input Undervoltage Lockout

Applications/Uses

  • Distributed Power Systems
  • Notebook Power
  • Portable Devices
  • Preregulators for Linear Regulators

Description

The MAX15088 high-efficiency, current-mode, synchronous step-down switching regulator with integrated power switches delivers up to 3A of output current. The device operates from 2.7V to 5.5V and provides an output voltage from 0.6V up to 94% of the input voltage, making the device ideal for distributed power systems, portable devices, and preregulation applications.

The MAX15088 uses a current-mode control architecture with a high gain transconductance error amplifier. The current-mode control architecture facilitates easy compensation design and ensures cycle-by-cycle current limit with fast response to line and load transients.

The MAX15088 offers selectable skip-mode functionality to reduce current consumption and achieve a higher efficiency at light output load. The low RDS(ON) integrated switches ensure high efficiency at heavy loads while minimizing critical inductances, making the layout design a much simpler task with respect to discrete solutions. Using a simple layout and footprint assures first-pass success in new designs.

The MAX15088 features a 1MHz, factory-trimmed, fixed-frequency PWM mode operation. The high switching frequency, along with the PWM current-mode architecture, allows for a compact, all-ceramic capacitor design.

The MAX15088 offers an external reference input that can be used for tracking the device startup into a PREBIAS output and offers a PGOOD open-drain output that can be used as an interrupt for power sequencing.

The MAX15088 is available in a 9-bump (3 x 3 array), 1.5mm x 1.5mm WLP package and is specified over the -40°C to +85°C temperature range.

Simplified Block Diagram

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .