XYT3504 Description/概述：
The XYT3504 is PFM step-up DC-DC converter. The XYT3504 can start up by supply voltage as low as 0.8V, and capable of delivering maximum 200mA output current at 3.3V output with 1.8V input voltage. The XYT3504 is available in a Pb-free, space-saving low profile 3-pin SOT23,TO92 or SOT89 package.
XYT3504是PFM升压DC-DC转换器。XYT3504可以通过低至0.8V的电源电压启动，并能够在3.3V的输入电压下提供最大200 mA的输出电流。XYT3504可在一个Pb免费，节省空间的低压3针SOT23 ，TO92或SOT89封装。
XYT3504 Features/特性：
High Efficiency: Up to 97%
Low start-up voltage(load=1mA):0.8V
The converter output voltage can be adjusted from 2.1V to 5.5V (in 0.1V step)
Only Three External Components
Low Quiescent Current: 10μA
Over-Current Protection
Thermal Fault Protection
SOT23-3/SOT89-3/TO92 package
XYT3504 Applications/应用：
Power source for LED
Power source for a single or dual-cell battery-powered equipments
XYT3504 Typlcal Application:
XYT3504 Package/Order Information：
XYT3504 Functional Block Diagram：
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