特点
5V Output Current:
100mA (V
IN
>/= 3V)
3.3V Output Current:
80mA (V
IN
>/= 2.5V)
Ultralow Power: 20μA Quiescent Current
Regulated Output Voltage: 3.3V ±4%, 5V ±4%, ADJ
V
IN
Range: 2V to 5.5V
800kHz Switching Frequency
No Inductors
Very Low Shutdown Current: <2μA
Shutdown Disconnects Load from V
IN
PowerGood/Undervoltage Output
Adjustable Soft-Start Time
Short-Circuit/Thermal Protection
Available in 8-Pin MSOP
典型应用
典型应用
描述
The LTC1751 family operate as Burst Mode? switched capacitor voltage doublers to achieve ultralow quiescent current. They have thermal shutdown capability and can survive a continuous short circuit from V out to GND. The PGOOD pin on the LTC1751-3.3 and LTC1751-5 indicates when the output voltage has reached its final value and if the output has an undervoltage fault condition. The FB pin of the adjustable LTC1751 can be used to program the desired output voltage or current. An optional soft-start capacitor may be used at the SS pin to prevent excessive inrush current during start-up.
The LTC1751 family is available in an 8-pin MSOP package.