MCP1602T-120I/MS

The MCP1602T-120I/MS from Microchip Technology is a highly efficient, fully integrated 500 mA synchronous buck regulator. It features a fixed output voltage of 1.2V and is designed for applications requiring a stable power supply from batteries or distributed systems.

This regulator operates within an input voltage range of 2.7V to 5.5V, making it suitable for 1-cell Li-Ion or 2-cell/3-cell NiMH/NiCd battery-powered devices. It boasts a typical efficiency of over 90% and a low quiescent current of 45 µA, minimizing power consumption. The device operates at a 2.0 MHz fixed-frequency PWM mode under heavy loads, providing a low-noise, low-output ripple solution. At lighter loads, it automatically transitions to a PFM mode to conserve battery power.

Key features include over 90% typical efficiency, output current up to 500 mA, and a power-good output with a 262 ms delay. Protection features include undervoltage lockout (UVLO), overtemperature protection, and overcurrent protection. The MCP1602T-120I/MS is available in a space-saving 8-MSOP package, suitable for surface mounting.

Applications for this buck regulator include cellular telephones, portable computers, organizers/PDAs, USB-powered devices, digital cameras, and other portable equipment requiring efficient voltage regulation.