SGMICRO SGM41280A Wide Input Range Boost Converter with Bypass Switch

PublishTime：2020-06-09

The SGM41280A is a wide input range front-end DC/DC synchronous boost converter with a bypass switch designed to efficiently connect a battery voltage source to the power rail of a system. It is typically used in portable applications such as smart phones or tablets. Five preset voltages can be programmed for the output by applying pulse patterns on the VS input pin. The SGM41280A has two main bypass modes (active and passive) to directly connect the load to the VINsource. In the active bypass mode, the direct connection is made through a supplementary bypass switch when VIN is above the programmed VOUT, otherwise a boost converter regulates the load voltage rail at the programmed value. The low input voltage may occur due to the increased load current or battery low charge state. When the input voltage is high, the boost converter is turned off and the input is directly bypassed to the output by the bypass switch, resulting in a very small drop between input and output. In the passive bypass mode, only the top switch of the boost converter is kept on providing the bypass route along with the series input inductor. In this mode, the path resistance is relatively higher, but the device consumes a very small quiescent current (IQ). Most of the internal circuits including the boost and protection blocks are off to minimize power consumption. Therefore, in passive bypass mode, VOUT can drop below programmed value as it follows VIN. The SGM41280A is an enhanced version of the SGM41280, with the passive bypass mode added for improved lower loss performance.This device can be shut down by VS pin to disconnect the output and minimize quiescent current. It is still programmable by VS pin when it is shut down and can go back to the previous bypass mode or to a new setting.The boost runs at 2.5MHz but the frequency drops at light load when converter uses PSM for power-saving. The SGM41280A is available in Green WLCSP-1.27×1.67-12B and TQFN-3×3-16L packages and can operate over -40°C to +85°C ambient temperature range

Brand of Product：	SGMICRO
Part#：	SGM41280A 、 SGM41280AYG/TR 、 SGM41280AYTQ16G/TR 、 WPN252012ER47MT 、 MHCD322512A-R47M-A8S 、 SGM41280 More Part#
Product Category：	Boost Converter with Bypass Switch 、 Wide Input Range Boost Converter with Bypass Switch More
Application：	[ Smart-Phones ][ Tablet PCs ][ Portable Electronic Equipment ][ Brownout Prevention with High Power Loads ] More
Data Type：	Datasheet More
Safety & Environment Standards：	ESD(CDM,1000V) 、 ESD(HBM,4000V) 、 HSF 、 Halogen Free 、 Pb-Free 、 RoHS More
Operating Temperature：	Please see the document for details
Qualification Grade：	More
Qualification Approval：	More
Package：	WLCSP-1.27×1.67-12B;TQFN-3×3-16L
Language：	English Chinese Chinese and English Japanese
Date of Creation：	MARCH 2020
Version Number：	REV. A
Data Encoding：
Data Size：	1.6 MB

Data section preview(2pages)

- The full preview is over. If you want to read the whole 22 page document,please Sign in/Register -

Download

+1 Like
Add to Favorites

Recommend

New Products & Solutions

More>

Technical Resources

More>

All reproduced articles on this site are for the purpose of conveying more information and clearly indicate the source. If media or individuals who do not want to be reproduced can contact us, which will be deleted.

Integrated Circuits