DCDC降压转换器， 不需肖特基二极管，电路超简单，2MHZ, 高达40V输入, 几乎是最简单的降压电路。

型号： BL9341 ，

 是上海贝尔大厂出品的，出货是几万K的，品质相当不错。已经大量在电表，电力，工业，仪表等等领域使用。

2MHZ开关频率，可以使用更小的电感，纹波更小，成本优势明显，节能PCB空间。特别适合模拟信号采样应用要求低纹波的场合。建议配合使用固体铝电解电容或是钽电容，效果更佳！

4.7-40V输入电压，0.6A输出电流，输出电压可调。

 DCDC降压转换器， 不需肖特基二极管，电路超简单，我见过最简单的降压电路。 

转换效率超高，

 带短路、热、欠压、过压等保护。

封装规格：SOT-23-6

DC-DC芯片/ BL9341 

采购连接：http://www.szlcsc.com/product/details_94372.html

数据手册：BL9341_V1.1_low cost.pdf 

Anyone test the quiescent current of BL9341? How low can it go?

The datasheet says 50uA (0.05mA) doesn't sound right.

The TI TPS54160 can only achieve 160uA (0.16mA), which is the best I have tested in real life. The full product idle current with MCU, CAN transceiver sleep current, RS485 transceiver sleep current, I can measured around 0.39~0.51mA with a 14.2V DC input. And this has to thank the 0.16mA on the TI SMPS IC TPS54160.

Other vendor MPS, claims the best quiescent is about 120uA (0.12mA), which is close to TI's performance.

50uA quiescent current? How true can it be?

>还是用34063这个

more detail?

>LMR1206/LMR1203 

Cannot find any information about it.

>焊好之后上电就炸，

what cause the ic damaged?

>MP2494DN-LF-Z, 频率 - 开关：100kHz

Are you sure it can be used to replace a 2Mhz smps IC?