Texas Instruments 1.8V 8A 3.3/5Vin ISR, SMD, S-Tab Voltage regulator P/N: PT6526B. Description: These power modules are a series of high performance, 8-A rated, Integrated Switching Regulators (ISRs), housed in a low cost 14-Pin SIP (Single In-line Package). Operating from either a 3.3V or 5V standard power bus, the PT6520 series produces a high-output, low-voltage power source for the industry+s latest high-speed, microprocessors, ASICs, & DSPs. This allows for the easy integration of these new low-voltage ICs into existing 3.3V or 5V systems without re-designing the power supply. The PT6520 series features an output On/Off standby pin and output shortcircuit protection.