MP2459 0.5A, 480kHz Step-Down Converter TSOT23

MP2459 0.5A, 480kHz Step-Down Converter TSOT23

Key Specifications

Features

• 0.5A Peak Output Current
• 1Ω Internal Power MOSFET
• Stable with Low-ESR Ceramic Output Capacitors
• Up to 90% Efficiency
• 0.1μA Shutdown Mode
• Fixed 480kHz Frequency
• Thermal Shutdown
• Cycle-by-Cycle Over-Current Protection
• Wide 4.5V-to-55V Operating Input Range
• Output Adjustable from 0.81V to 0.95*VIN

Applications

• Power Meters
• Distributed Power Systems
• Battery Chargers
• Pre-Regulator for Linear Regulators

Design Notes

• The step-down topology needs an inductor and output capacitor sized for the ripple at the switching frequency, not just the DC load.
• Keep the input loop short — high di/dt at the switch node sets conducted EMI.
• Power switches are integrated, so the thermal path is the PCB copper under the pad.
• Package TSOT23 — check the land pattern in the datasheet before layout.

Common Questions