MIC2207YML EV: 1.8V @ 3A, 2.7 ~ 5.5V in, Buck

Summary

The Micrel MIC2207 is a high efficiency PWM Buck (step-down) regulator that provides up to 3A of output current. The MIC2207 operates at 2MHz and has proprietary internal compensation that allows a closed loop bandwidth of over 200 kHz.

The low on resistance internal p-channel MOSFET of the MIC2207 allows efficiencies over 94% and reduces external component count and eliminates the need for an expensive current sense resistor.

The MIC2207 operates from 2.7V to 5.5V input and the output can be adjusted down to 1V. The devices can operate with a maximum duty cycle of 100% for use in low-dropout conditions.

The MIC2207 evaluation board requires an input power source that is able to deliver greater than 2.7V at over 3A. The output load can either be an active or passive source.

Specifications

Manufacturer	Microchip Technology
Category	AC/DC and DC/DC Conversion
Sub-Category	DC/DC SMPS - Single Output
Eval Board Part Number	576-4528-ND
Eval Board Supplier	Microchip Technology
Eval Board	Board not Stocked
Topology	Step Down
Outputs and Type	1 Non-Isolated
Voltage Out: Factory Set	1.8 V
Current Out	3 A
Voltage In	2.7 ~ 5.5 V
Efficiency @ Conditions	>89%, 3V in, 1.8V @ 0.1 ~ 0.75 A >85%, 4.5V in, 1.8V @ 0.3 ~ 1.1 A >83%, 5.5V in, 1.8V @ 0.35 ~ 1.5 A
Voltage Out Range	1 ~ 2.5 V
Features	Current Limit (Adj. or Fixed) PFM or PWM Power Good Output Shutdown, Enable, Standby Thermal Protection
Switching Frequency	2 MHz
Standby Current [Typical]	2 µA
Quiescent Current [Typical]	570 µA
Component Count + Extras	11 + 6
Internal Switch	Yes
Design Author	Microchip Technology
Application / Target Market	Memory Back-up Networking Point of Load (PoL) Set-Top Boxes Telecom
Standby Current [Maximum]	10 µA
Quiescent Current [Maximum]	900 µA
Main I.C. Base Part	MIC2207YML
Date Created By Author	2006-05
Date Added To Library	2015-02