MPS > DC/DC (Step-Down) Synchronous Switcher > MP28115  

Product

MP28115 

Product Info

4A, 1.5MHz Synchronous Step-Down Converter

Description

The MP28115 is an internally compensated 1.5MHz fixed frequency PWM synchronous step-down regulator. MP28115 operates from a 2.7V to 6V input and generates an adjustable output voltage from 0.8V to 0.9xVIN at up to 4A load current. The MP28115 integrates a 60mΩ 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 MP28115 based solution achieves minimum footprint and component count. Fault condition protection includes Hiccup short-circuit protection, cycle-by-cycle current limiting and thermal shutdown. Other features include frequency synchronization input, internal soft-start and power good output. The MP28115 is available in a small 3x3mm 10-lead QFN package.

Features

• 4A Output Current
• Input Operation Range: 2.7V to 6V
• 1.5% Output Accuracy
• 60mΩ Internal Power MOSFET Switches
• All Ceramic Capacitor Design
• Up to 95% Efficiency
• 1.5MHz Fixed Switching Frequency
• Internal Soft‑Start
• Frequency Synchronization Input
• Power Good Output
• Cycle-by-Cycle Current Limiting
• Hiccup Short Circuit Protection
• Thermal Shutdown
• 3x3mm 10-Lead QFN Package

Typical Application

 

Efficiency Curve

 

Vin (Min) (V)

2.7 

Vin (Max) (V)

Iout (Max) (A)

Isw Limit (Typ) (A)

6.5 

Iq (Typ) (mA)

0.75 

Vfb (V)

0.8 

Freq 1 (kHz)

1500 

Freq 2 (kHz)

 

Soft Start

Internal 

Package 1

QFN10 

Package 2

 

Datasheet Download

Click here to download datasheet 

Eval Board Download

EV28115DQ-00B
EV28115DQ-00C
EV28115DQ-01C

App Note

 

Buy

Click here to buy 

Notes

 
©2010 Monolithic Power Systems, Inc. All Rights Reserved