FLASH_MEMORY_PROGRAMMER

Published:2009/7/16 22:01:00 Author:Jessie | From:SeekIC

Generating 12V from a 5-V supply for flash memory usually requires a switching regulator and inductor to produce the necessary 30-rnA byte-wide flash. The LTC1262 reduces to just four small capacitors and no inductors the components required for this dc-to-dc conversion function, which generates 30 mA guaranteed output current from a 5-V ±5 percent supply. This surface-mount solution requires less than 0.2 in2. The LTC1262 features a charge-pump-gated oscillator/tripler architecture operating at 300 kHz. The gating of the oscillator regulates the output voltage at 12V.Operating supply current for the LTC1262 is 1 mA maximum, which drops just 10μA max when the device is shut down. Output voltage ramp-up is well behaved, with absolutely no overshoot. The LTC1262 is specified to operate with input voltages down to 4.75 V and up to 5.5V.



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