LM1770 Datasheet - National Semiconductor

LM1770 SOT-23 Synchronous Buck Controller

The LM1770 is an efficient synchronous buck switching controller in a tiny SOT23 package. The constant on-time control scheme provides a simple design free of compensation components, allowing minimal component count and board space. It also incorporates a unique input feed-forward to maintain a con.

LM1770 Features

* n n n n n n n n Input voltage range of 2.8V to 5.5V 0.8V reference voltage No compensation required Constant frequency across input range Low quiescent current of 400µA Internal soft-start Short circuit protection Tiny SOT-23 package Applications n Simple To Design, High Efficiency Step Down Switch

LM1770_NationalSemiconductor.pdf