PS3240 SOT23-5 DC-DC 5V2A同步降压芯片

PS3240是一种高效的单片同步降压调节器，使用恒定频率，电流模式架构。该设备有一个可调的版本。无负载的供电电流为40uA，停机时降至<1uA。2.5V到5.5V的输入电压范围使PS3240非常适合于单个锂离子电池供电的应用。100%的占空比提供了较低的退出操作，延长了便携式系统的电池寿命。PWM/PFM模式操作为噪声敏感的应用提供了非常低的输出纹波电压。开关频率内部设置为1.2MHz，允许使用小型表面安装电感器和电容器。0.6V的反馈参考电压很容易支持低输出电压。产品特点

高效率：高达96%

2.5V至5.5V的输入电压范围

1.2MHz恒频运行

没有肖特基二极管需要低退出操作： 100%的占空比

光负荷下的PFM模式，高效

过温保护低静止电流：40μA

短路保护

涌入电流限制和软启动

2A连续输出电流，SOT23-5

General DescriptionThe PS3240 is a high-efficiency monolithic synchronous buck regulator using a constant frequency, current modearchitecture. The device is available in an adjustable version. Supply current with no load is 40uA and drops to<1uA in shutdown. The 2.5V to5.5V input voltage range makes the PS3240 ideally suited for single Li-Ion batterypowered applications. 100% duty cycle provides low dropout operation, extending battery life in portable systems.PWM/PFM mode operation provides very low output ripple voltage for noise sensitive applications.Switching frequency is internally set at 1.2MHz, allowing the use of small surface mount inductors and capacitors.Low output voltages are easily supported with the 0.6V feedback reference voltage.The PS3240 is offered in a low profile (1mm) 5-pin, thin SOT package, and is available in an adjustable version.

Features • High Efficiency: Up to 96% • 2.5V to 5.5V Input Voltage Range • 1.2MHz Constant Frequency Operation • No Schottky Diode Required • Low Dropout Operation: 100% Duty Cycle • PFM Mode for High Efficiency in Light Load.