Product Folder
Order Now
Technical Documents
Tools & Software
Support & Community
Reference Design
LM5122
SNVS954H...
Product Folder
Order Now
Technical Documents
Tools & Software
Support & Community
Reference Design
LM5122
SNVS954H – FEBRUARY 2013 – REVISED JUNE 2017
LM5122 Wide-Input Synchronous Boost Controller With Multiple Phase Capability
1 Features
1 Maximum Input Voltage: 65 V Minimum Input Voltage: 3 V (4.5 V for Start-Up) Output Voltage up to 100 V Bypass (VOUT = VIN) Operation 1.2-V Reference with ±1% Accuracy Free-Run and Synchronizable Switching to 1 MHz 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 Multi-phase Capability Thermally Enhanced 20 or 24-Pin HTSSOP Create a Custom Design Using the LM5122 With
the WEBENCH® Power Designer
2 Applications
12-V, 24-V, and 48-V Power Systems Automotive Start-Stop Audio Power Supply High-Current Boost Power Supply
3 Description
The LM5122 is a multi-phase capable synchronous boost controller intended for high-efficiency synchronous boost
regulator applications. The control method is based upon peak-current-mode control. Current-mode control provides inherent line feed forward, cy...