Comprising both switch and latch types, the TLx496x series of Hall sensors from Infineon offers precise switching points, stable operation, and low power consumption. At 1.6 mA, the devices consume 50% less power than comparable products, and the 5-V versions consume just 1.4 mA. by @ Susan Nordyk @ edn.com:
All of the TLx496x series sensors integrate a Hall element, voltage regulator, choppers, oscillator, and output driver, reducing both board space and system costs. The voltage regulator powers the Hall element and active circuits. The chopper ensures that the temperature remains stable and minimizes the effects of process fluctuations.
Hall sensors consume no more than 1.6 mA – [Link]