The TPS50301 is a 6.3-V, 3-A and the TPS50601 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.

Features

Peak Efficiency: 95% (VO = 3.3 V) Integrated 55-mΩ/50-mΩ MOSFETs Split Power Rail: 1.6 V to 6.3 V on PVIN Power Rail: 3 V to 6.3 V on VIN TPS50301-HT: 3 A TPS50601-SP: 6 A TPS50601-SP: SEL Latchup Immune to LET = 85 MeV-cm2/mg TPS50601-SP: Total Dose (TID) tolerance = 100kRad (Si) Flexible Switching Frequency Options: 100-kHz to 1-MHz Adjustable Internal Oscillator External Sync Capability from 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 Pre-Biased Outputs Adjustable Slow Start and Power Sequencing Power Good Output Monitor for Undervoltage and Overvoltage Adjustable Input Undervoltage Lockout For SWIFT Documentation, Visit