Description

The TC1313 combines a 500 mA synchronous buck regulator and 300 mA Low-Dropout Regulator (LDO) to provide a highly integrated solution for devices that require multiple supply voltages. The unique combination of an integrated buck switching regulator and low dropout linear regulator provides the lowest system cost for dual-output voltage applications that require one lower processor core voltage and one higher bias voltage.

Features

• Dual-Output Regulator (500 mA Buck Regulator and 300 mA Low-Dropout Regulator (LDO))

• Total Device Quiescent Current = 57 µA (Typ.)

• 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 Typ. @ 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