MAX15108

High-Efficiency, 8A, Current-Mode Synchronous Step-Down Switching Regulator

Smallest (2mm x 2.5mm), 8A, DC-DC Solution with Integrated MOSFETs in the Market

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Description

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The MAX15108 high-efficiency, current-mode, synchronous step-down switching regulator with integrated power switches delivers up to 8A of output current. The regulator operates from 2.7V to 5.5V and provides an output voltage from 0.6V up to 95% of the input voltage, making the device ideal for distributed power systems, portable devices, and preregulation applications.

The IC 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 regulator offers a 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 inductance, making the layout design a much simpler task with respect to discrete solutions. The IC's simple layout and footprint assures first-pass success in new designs.

The regulator 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 IC features a capacitor-programmable soft-start to reduce input inrush current. Internal control circuitry ensures safe-startup into a prebiased output. Power sequencing is controlled with the enable input and power-good output.

The IC is available in a 20-bump (4 x 5 array), 2.5mm x 2mm, WLP package and is fully specified over the -40°C to +85°C temperature range.
 

Data Sheet

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An evaluation kit is available: MAX15108EVKIT

Key Features

  • Continuous 8A Output Current
  • Efficiency up to 96%
  • ±1% Accuracy Over Load, Line, and Temperature
  • Operates from a 2.7V to 5.5V Supply
  • Adjustable Output from 0.6V to 0.95 x VIN
  • Programmable Soft-Start
  • Safe Startup into Prebiased Output
  • External Reference Input
  • 1MHz Switching Frequency
  • Stable with Low-ESR Ceramic Output Capacitors
  • Skip Mode or Forced PWM Mode
  • Enable Input and Power-Good Output for Power-Supply Sequencing
  • Cycle-by-Cycle Overcurrent Protection
  • Fully Protected Features Against Overcurrent and Overtemperature
  • Input Undervoltage Lockout
  • 20-Bump (4 x 5 Array), 2.5mm x 2mm, WLP Package
 

Applications/Uses

  • Base Stations
  • DDR Memory
  • Distributed Power Systems
  • Notebook Power
  • Portable Devices
  • Server Power
   

Key Specifications:

Step-Down Switching Regulators
Part Number VIN
(V)
VIN
(V)
VOUT
(V)
VOUT
(V)
Max. IOUT
(A)
Output Adjust. Method DC-DC Outputs Oper. Freq.
(kHz)
Package/Pins Smallest Available Pckg.
(mm2)
Budgetary Price
min max min max max w/pins See Notes
MAX15108  2.7 5.5 0.6 5.225 8
Dyn. REF In
Resistor
1 1000
WLP/20
5.2 $4.10 @1k
See All Step-Down Switching Regulators (288)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.


Diagram

MAX15108: Typical Operating Circuit
Typical Operating Circuit

More Information

New Product Press Release 2012-03-22 ]

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Information Index

Document Ref.: 19-5917 Rev 1; 2011-10-20
This page last modified: 2012-01-06




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