General Description

MIC45205 is a synchronous step-down regulator

module, featuring a unique adaptive ON-time control

architecture. The module incorporates a DC/DC

controller, power MOSFETs, bootstrap diode, bootstrap

capacitor, and an inductor in a single package;

simplifying the design and layout process for the end

user.

This highly integrated solution expedites system

design and improves product time-to-market. The

internal MOSFETs and inductor are optimized to

achieve high efficiency at a low output voltage. The fully

optimized design can deliver up to 6A current under a

wide input voltage range of 4.5V to 26V, without

requiring additional cooling.

The MIC45205-1 uses Microchip’s HyperLight Load?

(HLL) and the MIC45205-2 uses Microchip’s Hyper

Speed Control? architecture that enables ultra-fast

load transient response, allowing for a reduction of

output capacitance.

The MIC45205 offers 1 output accuracy that can be

adjusted from 0.8V to 0.85 x VIN with two external

resistors. Additional features include thermal shutdown

protection, input undervoltage lockout, adjustable

current-limit, and short-circuit protection. The

MIC45205 allows for safe start-up into a pre-biased output.

特性 Features

? No Compensation Required

? Up to 6A Output Current

? >93 Peak Efficiency

? Output Voltage: 0.8V to 0.85 x VIN with ±1

Accuracy

? Adjustable Switching Frequency from 200 kHz to

600 kHz

? Enable Input and Open-Drain Power Good Output

? HyperLight Load (MIC45205-1) Improves Light

Load Efficiency

? Hyper Speed Control (MIC45205-2) Architecture

Enables Fast Transient Response

? Supports Safe Startup into Pre-Biased Output

? –40°C to +125°C Junction Temperature Range

? Thermal Shutdown Protection

? Short-Circuit Protection with Hiccup Mode

? Adjustable Current-Limit

? Available in 52-pin 8 mm × 8 mm × 3 mm B1QFN Package

Applications

? High Power Density Point-of-Load Conversion

? Servers, Routers, Networking, and Base Stations

? FPGAs, DSP, and Low-Voltage ASIC Power

Supplies

? Industrial and Medical Equipment