peculiarity
双增益转换器（2X，3/2x），效率高达93％。
电感解决方案使用的只有4个小型的陶瓷电容器。
整体解决方案面积
真正意义上的输入输出和输入输出断开。
高达180 mA的输出电流能力（5V）。
可选择4.1V，4.5V或5.0V输出。
预调最大限度地减少输入电流纹波。
1.24 MHz的开关频率，低噪声，低纹波输出电压。
集成过电流和热关机保护。
微小的1.2毫米× 1.6毫米× 0.4毫米间距，12焊球micro SMD封装。
illustrate
The LM2757 is a constant frequency, pre-regulated, switched capacitive charge pump that operates at 1.25 MHz to produce a low-noise regulated output voltage. The device is configurable and can deliver up to 100 mAh 4.1V, 4.5V 110 mAh, or 5V 180mAh. Excellent efficiency, achieving operating benefits is 3/2 or 2 selecting charge pumps based on input and output voltage options without the use of inductors.
The LM2757 exhibits high impedance when the V OUT pin is turned off. This allows the application to use while the LM2757 shuts off the regulated output bus and is driven by another supply.
A perfect fit for space-constrained, battery-powered applications, the LM2757 requires only 4 small, inexpensive ceramic capacitors. The LM2757 is a tiny 1.2 mm × 1.6 mm 12-bump micro SMD device. Built-in soft-start, over-current protection and thermal shutdown are also included in this device.
apply
USB/USB OTG/HDMI power supply
Supercapacitor chargers
Keyboard LED driver
Audio amplifier power supply
Low-current camera flash
Conversion of general-purpose lithium-ion batteries to 5V
Mobile phone SIM card