ZHCSCA8A March 2014 – April 2019 TPS65286
PRODUCTION DATA.
The TPS65286 PMIC integrates two independent current-limited, power distribution switches using N-channel MOSFETs for applications where short circuits or heavy capacitive loads will be encountered and provide precision current limit protection and fast protection response to over current. Additional device features include over temperature protection and reverse-voltage protection. The device incorporates an internal charge pump and gate driver circuitry necessary to drive the N-channel MOSFET. The charge pump supplies power to the driver circuit and provides the necessary voltage to pull the gate of the MOSFET above the source. The charge pump operates from the input voltage of power switches as low as 2.5 V. The driver incorporates circuitry that controls the rise and fall times of the output voltage to limit large current and voltage surges and provides built-in soft-start functionality. The TPS65286 device limits output current to a safe level when output load exceeds the current limit threshold. After deglitching time, the device latches off when the load exceeds the current limit threshold. The device asserts the nFAULT1/2 signal during over current or reverse voltage faulty condition.
The TPS65286 PMIC also integrates a synchronous step-down converter with regulated 0.6 V ±1% feedback reference voltage. The synchronous buck converter incorporates 55-mΩ high side power MOSFET and
30-mΩ low side power MOSFETs to achieve high efficiency power conversion. The converter supports an input voltage range from 4.5 V to 28 V. The converter operates in continuous conduction mode (CCM) with peak current mode control for simplified loop compensation. The peak inductor current limit threshold is adjustable to up to 8 A. The switching clock frequency is a fixed 500 kHz. The soft-start time can be adjusted by connecting an external capacitor at the SS terminal or fixed at 1 ms with the SS terminal open.