It looks to me like the LPC11u35 has a bootloader in ROM, and only needs a pin tied low (ok, and a second pin to select USB or serial) to execute boot code after reset. See section 20.4 of the User Manual. Other options that use fuses on an AVR are either handled via normal programmable registers (ie the external clock oscillator, JTAG functions) or by programming some magic flash locations (code protection.)