TC1303A-ZS0EUNTR

The TC1303A 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. The 500 mA synchronous buck regulator switches at a fixed frequency of 2.0 MHz when the load is heavy, providing a low noise, small-size solution. When the load on the buck output is reduced to light levels, it changes operation to a Pulse Frequency Modulation (PFM) mode to minimize quiescent current draw from the battery. No intervention is necessary for smooth transition from one mode to another. The LDO provides a 300 mA auxiliary output that requires a single 1 µF ceramic output capacitor, minimizing board area and cost. The typical dropout voltage for the LDO output is 137 mV for a 200 mA load. For the TC1303A, the power-good output is based on the regulation of the buck regulator output, the LDO output or the combination of both. The TC1303A features start-up and shutdown output sequencing. The TC1303A is available in either the 10-pin DFN or MSOP package. Additional protection features include: UVLO, overtemperature and overcurrent protection on both outputs.

• 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, Typical
• 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 Typical @ 200 mA - Standard Fixed-Output Voltages (1.5V, 1.8V, 2.5V, 3.3V)
• Power-Good Function: - Monitors Buck Output Function (TC1303A)
• 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<