General Description

The MIC45116 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 4.75V to 20V without

requiring additional cooling.

The MIC45116-1 uses HyperLight Load® (HLL) which

maintains high efficiency under light load conditions by

transitioning to variable frequency, discontinuousmode

operation. The MIC45116-2 uses Hyper Speed

Control® architecture which enables ultra-fast load

transient response, allowing for a reduction of output

capacitance. The MIC45116 offers 1 output accuracy

that can be adjusted from 0.8V to 85 of the input

(PVIN) with two external resistors. Additional features

include thermal-shutdown protection, adjustable

current limit, and short-circuit protection. The

MIC45116 allows for safe start-up into a pre-biased

output.

Features

• Up to 6A Output Current

• >93 Peak Efficiency

• Output Voltage of 0.8V to 85 of Input with ±1 Accuracy

• Fixed 600 kHz Switching Frequency

• Enable Input and Open-Drain Power Good Output

• HyperLight Load® (MIC45116-1) Improves Light Load Efficiency

• Hyper Speed Control® (MIC45116-2) Architecture Enables Fast Transient Response

• Supports Safe Start-Up 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-Lead 8 mm x 8 mm x 3 mm H3QFN 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