LSP5502 Datasheet | LITEON

FEATURES 2A Output Current Wide 4.5V to 27V Operating Input Range Integrated 120mΩ Power MOSFET Switches Output Adjustable from 0.925V to 24V Up to 96% Efficiency Programmable Soft-Start Stable with Low ESR Ceramic Output Capacitors Fixed 400KHz Frequency Cycle-by-Cycle Over Current Protection Input Under Voltage Lockout 8-Pin SOP Package GENERAL DESCRIPTION The LSP5502 is a monolithic synchronous buck regulator. The device integrates 120mΩ MOSFETS that provide 2A continuous load current over a wide operating input voltage of 4.5V to 27V. Current mode control provides fast transient response and cycle-by-cycle current limit. An adjustable soft-start prevents inrush current at turn on. In shutdown mode, the supply current drops below 1µA. This device, available in an 8-pin SOP package, provides a very pact system solution with minimal reliance on external ponents. TYPICAL APPLICATION Distributed Power Systems Networking Systems FPGA, DSP, ASIC Power Supplies Green Electronics/ Appliances Notebook puters PIN ASSIGNMENT SOP-8L (TOP View) BS IN SW GND 1 2 3 4 8 7 6 5 SS EN P FB PIN DESCRIPTION Name BS IN SW GND FB P EN SS No. 1 2 3 4 5 6 7 8 Description Bootstrap. This pin acts as the positive rail for the high-side switch’s gate driver. Connect a 0.01u F capacitor between BS and SW. Input Supply. Bypass this pin to G with a low ESR capacitor. See Input Capacitor in the Application Information section. Switch Output. Connect this pin to the switching end of the inductor. Ground. Feedback Input. The voltage at this pin is regulated to 0.925V. Connect to the resistor divider between output and ground to set output voltage. pensation Pin. See Stability pensation in the Application Information section. Enable Input. When higher than 2.5V, this pin turns the IC on. When lower than 1.3V, this pin turns the IC off. Output voltage is discharged when the IC is off. This pin should not be left open. Soft-Start Control Input. SS controls the soft-start period. Connect a...