Fs2451 can replace the high-voltage DCDC chip of MPS mp2451 to help the design of smart meter 40v0 5A step-down IC

When designing the power supply circuit of smart meter , You usually need a hypotensive pill DCDC take 12V To 5V Supply power to the later stage . Many manufacturers used to choose mps Of mp2451, However, with the increase of localization and low-cost demand , A cost-effective replacement material is urgently needed . In this paper, the electrical performance parameters 、 Introduction to packaging and application FS2459 Replace MPS2451. The following is the comparison of electrical performance parameters between the two ：

1、 In terms of input and output voltage and current , Oceanwide micro BUCK DCDC FS2451 Have higher input voltage 40V, comparison MP2451, Make sure the chip has enough margin .

2、 In terms of static power consumption ,MP2451 The typical value of quiescent current is 130uA, and FS2451 Better performance , have only 14uA, More suitable for low-power applications ;

3、 FS2451 It belongs to synchronous depressurization DCDC, Compared with asynchronous depressurization DCDC MP2451 for , More efficient ;

4、 In terms of product reliability ,MP2451 Built in multiple protection functions , If it's over current 、 A short circuit 、 Over temperature protection , and FS2451 In addition to the above protection functions , It also has output overvoltage protection , The operating temperature of both （ Temperature saving ） It's all in -40~125℃, Effectively ensure chip reliability .

FS2451 and MP2451 The same package size is SOT23-6, also pin The foot definition is exactly the same , When designing peripheral circuits , because FS2451 It's asynchronous step-down DCDC, and MP2451 Out of sync .