Maybe a 3.3 regulator is not rentable for your ap because of the low powerconsumption.. search on the TI site and sample some regs that are there for battery powered aps..
for example the REG1117 you can take a 3.3vols version or a adjustable one..
max 800ma max
i copy:
APPLICATIONS
SCSI-2 ACTIVE TERMINATION
HAND-HELD DATA COLLECTION DEVICES
HIGH EFFICIENCY LINEAR REGULATORS
BATTERY-POWERED INSTRUMENTATION
BATTERY MANAGEMENT CIRCUITS FOR
NOTEBOOK AND PALMTOP PCs
CORE VOLTAGE SUPPLY: FPGA, PLD, DSP,
CPU
this is your number: REG1117F-3.3
downside is 4,8volts minimum input.. but it last for ages on batteries
Tks