Microchip Technology TC1313-PP0EMF

Description
The TC1313 is a dual-output regulator that combines a 500 mA synchronous buck regulator and a 300 mA low-dropout regulator (LDO). It provides a highly integrated solution for devices requiring multiple supply voltages. The buck regulator operates at a fixed frequency of 2.0 MHz under heavy load, providing low noise and a small size. It automatically transitions to PFM mode under light load to minimize quiescent current draw. The LDO requires a single 1 μF ceramic output capacitor and has a typical dropout voltage of 137 mV at 200 mA load. The TC1313 is available in 10-pin DFN or MSOP packages and operates over a junction temperature range of -40°C to 125°C.

Features
500 mA synchronous buck regulator
300 mA low-dropout regulator (LDO)
Total device quiescent current: 57 μA (typical)
Independent shutdown for buck and LDO outputs
Both outputs internally compensated
Synchronous buck regulator:
Over 90% typical efficiency
2.0 MHz fixed-frequency PWM (heavy load)
Low output noise
Automatic PWM-to-PFM mode transition
Adjustable (0.8V to 4.5V) and standard fixed-output voltages (0.8V, 1.2V, 1.5V, 1.8V, 2.5V, 3.3V)
Low-dropout regulator:
Low-dropout voltage = 137 mV typical @ 200 mA
Standard fixed-output voltages (1.5V, 1.8V, 2.5V, 3.3V)
Small 10-pin 3x3 DFN or MSOP package options
Operating junction temperature range: -40°C to 125°C
Undervoltage lockout (UVLO)
Output short circuit protection
Overtemperature protection

Applications
Cellular phones
Portable computers
USB-powered devices
Handheld medical instruments
Organizers and PDAs