i want to make a low-power controller with lpc1768fbd100, the expacted power is :active state:4mA
;power-down state:80uA.the only wake up condition is external interrupt.
i built a evaluate model,only has a ldo(tps709) and lpc1768,no external oscillator. power supply is 9V. the chip work frequency is 4.0MHz. i disable all Peripheral clock(except gpio) and bod. now the active power is 3.8mA, but the power down state power is 500uA. DataSheet of 1768 said the power-down state is 30uA. the difference is too far, that is why?
ps.static power of tps709 is 1uA.