Microchip Technology, Inc. Voltage Regulators - Linear + Switching TC1303B-ZG0EMF

The TC1303B-ZG0EMF 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 requires only a 1 µF ceramic output capacitor, making it suitable for space-constrained applications. The device includes a power-good output with a 300 ms delay, which can monitor the LDO output, enhancing system reliability. Additional features include independent shutdown for both outputs, undervoltage lockout, output short circuit protection, and overtemperature protection. The operating temperature range is from -40°C to +125°C, making it suitable for various applications, including portable computers, USB-powered devices, and handheld medical instruments.