The TPS7H502x and TPS7H503x are a radiation-hardened, current mode, single-ended PWM controller with integrated gate drivers. The TPS7H502x can be utilized in both silicon and gallium nitride (GaN) power semiconductor based converter designs, while TPS7H503x is targeted toward silicon based converters. The controllers integrates several key functions, such as soft-start, enable, and adjustable slope compensation while maintaining a small package size. The controllers also feature a 0.6V ±1% voltage reference tolerance to support highly accurate power converter designs. The TPS7H502x and TPS7H503x can be operated using an external clock through the SYNC pin or by programming the internal oscillator using the RT pin at a frequency determined by the user. The TPS7H502x device is capable of switching at frequencies up to 1MHz, while the TPS7H503x supports up to 500kHz operation. The driver stages for the controllers have a wide input voltage range and supports peak source and sink currents up to 1.2A. The TPS7H502x has a programmable regulator, VLDO, which can also be connected directly to the input of the driver stage (PVIN) to supply well-controlled gate voltage for operation with GaN FETs. The programmable regulator has a voltage range from 4.5V to 5.5V. The TPS7H5020 and TPS7H5030 devices have a maximum duty cycle of 100% while the TPS7H5021 and TPS7H5031 have a 50% maximum duty cycle. The controllers support numerous power converter topologies, including flyback, forward, and boost.