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High-Efficiency, 3A, Current-Mode Synchronous, Step-Down Switching Regulator

Smallest 3A Solution Saves Board Space While Offering Excellent Efficiency

Product Details

Key Features

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 2.7
VIN (V) (max) 5.5
VOUT1 (V) (min) 0.6
VOUT1 (V) (max) 5
IOUT1 (A) (max) 3
Switch Type Internal
Output Adjust. Method Dyn. REF In
Resistor
Synchronous Switching? Yes
Power Good Signal Yes
# DC-DC Outputs 1
Switching Frequency (kHz) 1000
Design Tools EE-Sim
Package/Pins WLP HC/9
Budgetary
Price (See Notes)
0.84
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Simplified Block Diagram

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Parameters

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 2.7
VIN (V) (max) 5.5
VOUT1 (V) (min) 0.6
VOUT1 (V) (max) 5
IOUT1 (A) (max) 3
Switch Type Internal
Output Adjust. Method Dyn. REF In
Resistor
Synchronous Switching? Yes
Power Good Signal Yes
# DC-DC Outputs 1
Switching Frequency (kHz) 1000
Design Tools generateDesignEESIMUrl('http://maxim.transim.com/pwm2/designreq/Index?partId=1927', '')
Package/Pins WLP HC/9
Budgetary
Price (See Notes)
0.84

Key Features

  • Internal 30mΩ (typ) RDS(ON) High-Side and 18mΩ (typ) Low-Side MOSFETs at 5V
  • Continuous 3A Output Current Over Temperature
  • 95% 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
  • Programmable Soft-Start
  • Factory-Trimmed, 1MHz Switching Frequency
  • Stable with Low-ESR Ceramic Output Capacitors
  • Safe-Startup Into Prebiased Output
  • External Reference Input
  • Skip-Mode Functionality
  • Enable Input/Power-Good Output
  • Fully Protected Against Overcurrent and Overtemperature
  • Input Undervoltage Lockout

Applications/Uses

  • Distributed Power Systems
  • IP Phones
  • Notebook Power
  • Portable Devices
  • Preregulators for Linear Regulators
  • Server Power

Description

The MAX15058 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 MAX15058 utilizes 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 MAX15058 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. Utilizing a simple layout and footprint assures first-pass success in new designs.

The MAX15058 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 MAX15058 offers a capacitor-programmable soft-start reducing inrush current, startup into PREBIAS operations, and a PGOOD open-drain output that can be used as an interrupt and for power sequencing.

The MAX15058 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

MAX15058: Typical Operating Circuit MAX15058: Typical Operating Circuit Zoom icon

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 .