Microchip Technology, Inc. Voltage Regulators - Linear + Switching TC1303A-ZI0EMFTR

The TC1303A-ZI0EMFTR is a dual-output voltage regulator from Lingto Electronic Limited, featuring a 500 mA synchronous buck regulator and a 300 mA low-dropout regulator (LDO). The buck regulator operates with over 90% efficiency at a fixed frequency of 2.0 MHz under heavy load and transitions to pulse frequency modulation (PFM) mode at lighter loads to minimize quiescent current, which is typically 65 µA. The LDO has a low dropout voltage of 137 mV at 200 mA and supports standard fixed output voltages of 1.5V, 1.8V, 2.5V, and 3.3V. The device includes a power-good output with a 300 ms delay for processor reset applications and features independent shutdown controls for both outputs. It is available in a compact 10-pin DFN or MSOP package and operates over a junction temperature range of -40°C to +125°C. Additional protection features include undervoltage lockout, output short circuit protection, and overtemperature protection, making it suitable for applications in cellular phones, portable computers, USB-powered devices, and handheld medical instruments.