MIC2127A
75V, Synchronous Buck Controller Featuring Adaptive
On-Time Control
Features General Description Hyper Speed ControlВ® Architecture Enables:
-High Input to Output Voltage Conversion
Ratio Capability
-Any Capacitorв„ў 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 Frequency 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 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 В±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 …