FEATURES
z 2A Output Current Wide 4.5V to 28V Operating Input Range z Integrated Power MOSFET switches z Output Adjustable from 0.925V to 0.8Vin z Up to 96% Efficiency z Programmable Soft-Start z Stable with Low ESR Ceramic Output Capacitors z Fixed 340KHZ Frequency z Cycle-by-Cycle Over Current Protection z Short Circuit Protection z Input Under Voltage Lockout z Package： SOP-8L HT3420 2A 28V Synchronous Buck Converter GENERAL DESCRIPTION
Current mode control provides fast transient response and cycleby-cycle current limit. An adjustable softstart prevents inrush current at turn on. APPLICATIONS
z Distributed Power Systems z Networking Systems z FPGA, DSP, ASIC Power Supplies z Green Electronics/ Appliances z Notebook Computers Typical Application Circuit 1 of 15 Ordering Information HT3420 Pin Assignments Pin Descriptions Pin Number 1 2 3 4 5 6 Name BS VIN SW GND FB COMP 7 EN 8 SS BS 1 VIN 2 SW 3 GND 4 SOP-8L (TOP View) 8 SS 7 EN 6 COMP 5 FB DESCRIPTION
Bootstrap. This pin acts as the positive rail for the high-side switch’s gate driver.
HOTCHIP
