General Description
The MIC2133 is a constant on-time, dual phase,
synchronous buck controller featuring a unique adaptive
on-time control architecture with HyperLight Load and
phase shedding features enabled. The MIC2133 operates
over an input supply range from 8V to 75V. The output
voltage is adjustable down to 0.6V with an ensured
accuracy of ±1% at the FBS pin. The device operates
with programmable switching frequency from 100 kHz to
1 MHz per phase.
The Hyper Speed Control architecture supports an ultrafast
transient response under medium to heavy loads.
The soft start is also programmable externally with a
capacitor, thus, enabling safe start-ups into heavy loads.
The MIC2133 has a remote sense amplifier for accurate
output voltage control.
MIC2133 offers a full suite of protection features to
ensure protection of the IC during Fault conditions.
These include undervoltage lockout to ensure proper
operation, programmable soft start to reduce inrush current,
overvoltage discharge, Hiccup mode short-circuit
protection and thermal shutdown.
MIC2133 is available in a 5 mm x 5 mm, 32-pin VQFN
package with a -40°C to +125°C operating junction
temperature range.

Features
• Input Voltage Range: 8V to 75V
• Input Down to 2V when VDD = 5V from External
Supply
• Adjustable Output Voltage from 0.6V to 28V
• Adaptive Constant On-Time Control:
- High Delta V operation
- Any Capacitor™ stable
• 0.6V Internal Reference with ±1% Accuracy
• Ripple Injection from Third Node Allows Greater
than 50% Duty Cycles
• HyperLight Load® and Automatic Phase Shedding
• Ability to Interface with External MCU
• Accurate Current Balancing Between Phases
• Accurate 180° Phasing of Outputs
• 100 kHz to 1 MHz Switching Frequency per Phase
• High-Voltage Internal 5V LDO for Single-Supply
Operation
• Secondary LDO to Improve System Efficiency
• Supports Start-up to Pre-Bias Output
• Remote Sense Amplifier for Tight Output Regulation
• Droop Feature to Support Adaptive Voltage
Positioning (AVP) for Improved Load
Transient Response
• Precision Enable Function for Low Standby Current
• External Programmable Soft Start to Reduce
Inrush Current
• Lossless RDSON Current Sensing with NTC
Temperature Compensation or Resistor Sensing
Method
• Programmable Current Limit and Hiccup Mode
Short-Circuit Protection
• Thermal Shutdown with Hysteresis
• -40°C to +125°C Junction Temperature Range
• Compact Size 5 mm x 5 mm, 32-Pin VQFN
Package
• AEC-Q100 Qualified (VAO Suffix)

Applications
• Distributed Power Systems
• Communications/Networking Infrastructure
• Printers, Scanners, Graphic and Video Cards
• FPGA, CPU, Memory, GPU Core Supplies
• Automotive POL