TC1303B
Overview
The TC1303/TC1304 combines a 500 mA synchronous buck regulator and 300 mA Low-Dropout Regulator (LDO) with a power-good monitor 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.
- Dual-Output Regulator (500 mA Buck Regulator and 300 mA Low-Dropout Regulator)
- Power-Good Output with 300 ms Delay
- Total Device Quiescent Current = 65 µA, Typ.
- Independent Shutdown for Buck and LDO Outputs (TC1303)
- 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)
- Power-Good Function: - Monitors Buck Output Function (TC1303A) - Monitors LDO Output Function (TC1303B) - Monitors Both Buck and LDO Output Functions (TC1303C and TC1304) - 300 ms Delay Used for Processor Reset
- Sequenced Startup and Shutdown (TC1304)
- Small 10-pin 3X3 DFN or MSOP Package Options
