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MIC2127A

Microchip
Part Number MIC2127A
Manufacturer Microchip
Description Synchronous Buck Controller Featuring Adaptive On-Time Control
Published Aug 6, 2019
Detailed Description MIC2127A 75V, Synchronous Buck Controller Featuring Adaptive On-Time Control Features • Hyper Speed Control® Architect...
Datasheet PDF File MIC2127A PDF File

MIC2127A
MIC2127A

Overview
MIC2127A 75V, Synchronous Buck Controller Featuring Adaptive On-Time Control Features • Hyper Speed Control® Architecture Enables: - High Input to Output Voltage Conversion Ratio Capability - Any Capacitor™ Stable - Ultra-Fast Load Transient Response • Wide 4.
5V-75V Input Voltage Range • Adjustable Output Voltage from 0.
6V to 30V • 270 kHz-800 kHz Programmable Switching Fre- quency • Built-In 5V Regulator for Single-Supply Operation • Auxiliary Bootstrap LDO for Improving System Efficiency • Internal Bootstrap Diode • Selectable Light Load Operating Mode • Enable Input and Power Good Output • Programmable Current Limit • Hiccup Mode Short-Circuit Protection • Soft Start, Internal Compensation and Thermal Shutdown • Supports Safe Start-Up into a Prebiased Output Applications • Networking/Telecom Equipment • Base Station, Servers • Distributed Power Systems • Industrial Power Supplies Typical Application 4.
7 μF 10Ÿ 4.
7 μF VIN VDD 100 kŸ VIN 60 kŸ PVDD VDD MIC2127A PG EN VIN 0.
1 μF DH BST 0.
1 μF SW ILIM 1.
3 kŸ DL MODE FREQ AGND FB EXTVDD PGND VOUT 1 μF General Description The MIC2127A is a constant-frequency synchronous buck controller featuring a unique adaptive on-time control architecture.
The MIC2127A operates over an input voltage range from 4.
5V-75V.
The output voltage is adjustable down to 0.
6V with an accuracy of ±1%.
The device operates with programmable switching frequency from 270 kHz-800 kHz.
The MIC2127A features a MODE pin that allows the user to select either Continuous Conduction mode or Hyper Light Load (HLL) mode under light loads.
An auxiliary bootstrap LDO improves the system efficiency by supplying the MIC2127A internal circuit bias power and gate drivers from the output of the converter.
A logic level enable (EN) signal can be used to enable or disable the controller.
The MIC2127A can start-up monotonically into a prebiased output.
The MIC2127A features an open drain power good signal (PG) that signals when the output is in regulation and...


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