The TPS50301-HT is a 6.3-V, 3-A and the TPS50601-SP is a 6.3-V, 6-A synchronous step-down converter, which is optimized for small designs through high efficiency and integrating the high-side and low-side MOSFETs. Further space savings are achieved through current mode control, which reduces component count, and a high switching frequency, reducing the inductor's footprint. The devices are offered in a thermally enhanced 20-pin ceramic, dual in-line flatpack package.
The output voltage startup ramp is controlled by the SS/TR pin which allows operation as either a stand alone power supply or in tracking situations. Power sequencing is also possible by correctly configuring the enable and the open drain power good pins.
Cycle-by-cycle current limiting on the high-side FET protects the device in overload situations and is enhanced by a low-side sourcing current limit which prevents current runaway. There is also a low-side sinking current limit which turns off the low-side MOSFET to prevent excessive reverse current. Thermal shutdown disables the part when die temperature exceeds thermal shutdown temperature.
Peak Efficiency: 95% (VO = 3.3 V)
Split Power Rail: 1.6 to 6.3 V on PVIN
Power Rail: 3 to 6.3 V on VIN
TPS50301-HT: 3 A
Flexible Switching Frequency Options:
100-kHz to 1-MHz Adjustable Internal Oscillator
External Sync Capability: 100 kHz to 1 MHz
Sync Pin can be Configured as a 500-kHz Output for Master/Slave Applications
0.795-V ±1.258% Voltage Reference at 25°C
Monotonic Start-Up into Prebiased Outputs
Adjustable Slow Start and Power Sequencing
Power Good Output Monitor for Undervoltage and Overvoltage