LM25122QPWPTQ1 Description
For use in high-efficiency synchronous boost regulator applications, the LM25122 is a multiphase capable synchronous boost controller. Peak current mode control is the foundation of the control strategy. Inherent line feedforward, cycle-by-cycle current limiting, and simple loop compensation are all provided by current mode control.
Programmable switching frequencies range up to 600 kHz. Two strong Nchannel MOSFET gate drivers with adaptive deadtime control increase efficiency. For greater efficiency under light load situations, a user-selectable diode emulation mode also permits discontinuous mode operation.
LM25122QPWPTQ1 Features
Maximum Input Voltage : 42 V
Min Input Voltage : 3 V (4.5 V for startup)
Output Voltage up to 50 V
Bypass (VOUT = VIN) Operation
1.2 V Reference with ±1.0% Accuracy
Free-Run and Synchronizable Switching to 600 kHz
Peak Current Mode Control
Robust 3 A Integrated Gate Drivers
Adaptive Dead-Time Control
Optional Diode Emulation Mode
Programmable Cycle-by-Cycle Current Limit
Hiccup Mode Overload Protection
Programmable Line UVLO
Programmable Soft-Start
Thermal Shutdown Protection
Low Shutdown Quiescent Current: 9 μA
Programmable Slope Compensation
Programmable Skip Cycle Mode Reduces Standby Power
Allows External VCC Supply
Inductor DCR Current Sensing Capability
Multiphase Capability
Thermally Enhanced 20-Pin HTSSOP
LM25122QPWPTQ1 Applications
12-V, 24-V, and 48-V Power Systems
Automotive Start-Stop
Audio Power Supply
High Current Boost Power Supply
