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MIC2155

Microchip
Part Number MIC2155
Manufacturer Microchip
Published Nov 9, 2019
Description Two-Phase Single-Output PWM Synchronous Buck Controller
Detailed Description MIC2155 Two-Phase Single-Output PWM Synchronous Buck Control IC
Datasheet PDF File MIC2155 PDF File

MIC2155
MIC2155


Overview
MIC2155 Two-Phase Single-Output PWM Synchronous Buck Control IC Features • Synchronous Buck Control IC with Outputs Switching 180 Degrees Out of Phase • Remote Sensing with Internal Differential Amplifier • 4.
5V-to-14.
5V Input Voltage Range • Adjustable Output Voltages down to 0.
7V • 1% Output Voltage Accuracy • Starts up into a Pre-biased Output • 500 kHz PWM Operation • Adaptive Gate Drive allows Efficiencies of over 95% • Adjustable Current Limit with no Sense Resistor • Senses Low-Side MOSFET Current • Internal Drivers allow 25A per Phase • Power Good Output allows Simple Sequencing • Dual Enable Pins with Micro-Power Shutdown and UVLO • Programmable Soft-Start Pin • Output Overvoltage Protection • Works with Ceramic Output Capacitors • Multi-Input Supply Capability • Single-Output High-Current Capability with Master/Slave Current Sharing • External Synchronization • Small Footprint 32-Pin 5 mm × 5 mm VQFN • Junction Temperature Range of –40°C to +125°C General Description The MIC2155 is a two-phase, single-output synchronous buck control IC that features small size, high efficiency, and a high level of flexibility.
The IC implements a 500 kHz Voltage mode PWM control with the outputs switching 180 degrees out of phase.
The result of the out-of-phase operation is 1 MHz (or 600 kHz) input ripple with ripple current cancellation, minimizing the required input filter capacitance.
A 1% output voltage tolerance allows the maximum level of system performance.
Internal drivers with adaptive gate drive allow the highest efficiency with the minimum external components.
Two independent enable pins and a power good output are provided, allowing a high level of control and sequencing capability.
The MIC2155 has an operating junction temperature ranging from –40°C to +125°C.
Data sheets and support documentation can be found on the Microchip website at www.
microchip.
com.
Applications • Multi-Output Power Supplies with Sequencing • DSP, FPGA, CPU and ASIC Power Supplies • ...


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