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