Microchip Technology, Inc. Voltage Regulators - Linear + Switching TC1303B-PA0EMF

The TC1303B-PA0EMF is a dual-output voltage regulator that combines a 500 mA synchronous buck regulator and a 300 mA low-dropout (LDO) regulator. It features a power-good output with a 300 ms delay, allowing for effective monitoring of the output voltages. The device operates with a total quiescent current of 65 ¬µA and includes independent shutdown controls for both the buck and LDO outputs. The synchronous buck regulator achieves over 90% efficiency at a fixed frequency of 2.0 MHz under heavy load conditions, transitioning to pulse frequency modulation (PFM) mode at lighter loads to minimize battery drain. The output voltage for the buck regulator is adjustable from 0.8V to 4.5V, with standard fixed output options available. The LDO regulator has a typical dropout voltage of 137 mV at 200 mA and offers standard fixed output voltages of 1.5V, 1.8V, 2.5V, and 3.3V. The TC1303B-PA0EMF is suitable for applications in cellular phones, portable computers, USB-powered devices, and handheld medical instruments. It is available in a compact 10-pin DFN or MSOP package and operates over a junction temperature range of -40¬8C to +125¬8C. Additional protection features include undervoltage lockout, output short circuit protection, and overtemperature protection, making it a robust choice for various electronic designs.