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reference designMP28128

Monolithic Power Systems MP28128

2.5A, 1.5MHz Synchronous Step-Down Converter

Overview

TopologyBuck Converter
Input voltage2.7-6 V
Switching frequency1200-1800 kHz
Output 11.8 V / 2.5 A
IC revision0.92

Description

The MP28128 is a 1.5MHz fixed frequency PWM synchronous step-down regulator with internal compensation. MP28128 operates from a 2.7V to 6V input and generates an adjustable output voltage from 0.8V to 0.9xVIN at up to 2.5A load current.

The MP28128 integrates an 80mΩ high-side switch and a 60mΩ synchronous rectifier for high efficiency without an external Schottky diode. With peak current mode control and internal compensation, the MP28128 basedsolution delivers a very compact footprint with a minimum component count. Fault condition protection includes hiccup short-circuit protection, cycle-by-cycle current limiting and thermal shutdown. Other features includefrequency synchronization input, internal softstart and power good output.

The MP28128 is available in a small 3mm x 3mm 10-lead QFN package.

Features

  • 2.5A Output Current
  • Input Operation Range: 2.7V to 6V
  • 1.5% Output Accuracy
  • Internal Power MOSFET Switches
  • All Ceramic Capacitor Design
  • 1.5MHz Fixed Switching Frequency
  • Internal Soft-Start
  • Frequency Synchronization Input
  • Power Good Output
  • Cycle-by-Cycle Current Limiting
  • Thermal Shutdown
  • 3mm x 3mm 10-lead QFN Package

Typical applications

  • Telecom Equipment
  • µP/ASIC/DSP/FPGA Core and I/O Supplies
  • Point of Load Regulators
  • Printers
  • LCD TVs
  • Network Equipment

More information

Products

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Order Code
Data­sheet
Simu­lation
Downloads
Status
Product series
L(µH)
IRP,40K(A)
ISAT,10%(A)
ISAT,30%(A)
RDC(mΩ)
fres(MHz)
Material
Qty.
SamplesAvailability & Sample
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744310095
SPECWE-HCI SMT Flat Wire High Current Inductor, 0.95 µH, 14.4 A
Simu­lation
Availability
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Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-HCI SMT Flat Wire High Current Inductor
Inductance0.95 µH
Performance Rated Current14.4 A
Saturation Current @ 10%5 A
Saturation Current @ 30%13 A
DC Resistance6.2 mΩ
Self Resonant Frequency90 MHz
MaterialSuperflux 
Packaging Unit1500 
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