MP28119

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Ultra-small 1.7MHz, 600mA, 1.0V and 1.2V Fixed Out-put Versions, Synchronous Step-Down Converter



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Product Description

The MP28119 is a 1.7MHz constant frequency, current mode, ultra-small PWM step-down converter. The device integrates a main switch and a synchronous rectifier for high efficiency and eliminates the need for an external Schottky diode. It is ideal for powering portable equipment that runs from a single cell Lithium-Ion (Li+) battery. The MP28119 can supply 600mA of load current from a 2.5V to 6V input voltage. The MP28119 offers fixed 1.0V and 1.2V output option and adjustable output option. The MP28119 can run at 100% duty cycle for low dropout applications, and includes an output discharge function to control the discharging of the output capacitor. The MP28119 is available in an ultra-small 2x2 QFN package. 

Programmable

Product Features

  • High Efficiency: Up to 89%
  • 1.7MHz Constant Switching Frequency
  • 600mA Available Load Current
  • 2.5V to 6V Input Voltage Range
  • 100% Duty Cycle in Dropout
  • Current Mode Control
  • Short Circuit Protection
  • Thermal Fault Protection
  • Output Discharge Function
  • <0.1μA Shutdown Current
  • 1.0V and 1.2V Fixed Out-put Versions
  • Ultra-Small 2x2 QFN Package

Parametrics

  • fsw (max) (kHz)1700
  • Vin (min) (V)2.5
  • Vin (max) (V)6
  • Iout (max) (A)0.6
  • Isw Limit (typ) (A)1.6
  • Max Duty Cycle (%)1
  • Vfb (typ) (V)0.6
  • Iq (typ) (mA)0.4
  • Regulated Outputs1
  • Vout (max) (V)6
  • Vout (min) (V)0.6
  • GradeCatalog
  • PackageQFN-8 (2x2)
  • Control ModeCurrent Mode
  • Common FeaturesSynchronous Rectification
  • Special Features100% Duty Cycle, Fixed Output, Output Discharge

Evaluation Kit

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Kit details

The EV28119 evaluation board is designed for low dropout step down converter applications. It implements the MP28119 1.7MHz fixed frequency, current-mode, PWM step-down converter. The device integrates a main switch and a synchronous rectifier for high efficiency without an external Schottky diode. It is ideal for powering portable equipment that runs from a single cell Lithium-Ion (Li+) Battery. It can supply 600mA of load current from a 2.5V to 6V input voltage. The output voltage can be regulated as low as 0.6V. In 100% Duty Cycle Dropout operation, it works with minimum input voltage as low as output voltage. It can output voltage as low as 1V from 6V input due to its very small minimum on-time. Furthermore, with the output discharge function, even at no load, the output voltage falls quickly when disabled.

US$ 25.00 + tax


Reference Materials