| ??? 08/12/04 16:03 Read: times |
#75847 - RE: Voltage regulation for 3V devices Responding to: ???'s previous message |
Erik Malund said:
my 'grab bag' swelection is a switcher PT6302 for the 5V followed by a LDO LM2937-3.3 for the 3.3V. You can have many combinations of the same kind, meaning a step down DC/DC converter followed by an LDO. One good choice for a step down DC/DC is Maxim's MAX1626/MAX1627. As for LDOs again Maxim's MAX1793, MAX8869 and MAX687,688,689. All the above can give 1A without problems, but if you search you can find solutions that fit your needs better than the chips mentioned. To name a few Linear Tech, Texas Instruments, Fairchild, ST and National have excellent products considering power supply. Only one question: What about an LDO for the 5V followed by another LDO for the 3,3V? I haven't seen such a configuration. The most usual is a step down DC/DC followed by an LDO, as Erik mentioned... George |
