Microchip Technology, Inc. Voltage Regulators - Linear + Switching TC1303A-Z10EMF

The TC1303A-Z10EMF is a dual-output voltage regulator that combines a 500 mA synchronous buck regulator and a 300 mA low-dropout regulator (LDO) in a compact 10-pin DFN or MSOP package. The buck regulator operates with over 90% efficiency at a fixed frequency of 2.0 MHz under heavy load and features a low output noise design. It automatically transitions from PWM to PFM mode to minimize quiescent current during light load conditions. The LDO has a typical dropout voltage of 137 mV at 200 mA and supports standard fixed output voltages. The device includes a power-good output with a 300 ms delay for processor reset applications and independent shutdown controls for both outputs. Additional protection features include undervoltage lockout, output short circuit protection, and overtemperature protection. The operating junction temperature range is from -40¬8C to +125¬8C, making it suitable for various applications such as cellular phones, portable computers, USB-powered devices, and handheld medical instruments.