ACT4088 Datasheet | Qorvo

Features - Wide 4.5V to 28V Input Voltage Range - 1.5A Output Current (12VIN to 5VOUT) - Output Adjustable Down to 0.81V - 0.3Ω Internal Power MOSFET - Up to 92% Efficiency - Stable with Low ESR Ceramic Output Capacitors - Fixed 1.4MHz Operating Frequency - Internal Soft-Start Function - Over Current Protection with Hiccup-Mode - Thermal Shutdown - Available in a SOT23-6 Package APPLICATIONS - TFT LCD Monitors - Portable DVD, Headphones, MP3 Players, etc. - Car-Powered or Battery-Powered Equipment - Set-Top Boxes - Tele Power Supplies - DSL and Cable Modems and Routers TYPICAL APPLICATION CIRCUIT 28V, 1.5A, 1.4MHz Step-Down DC/DC Converter in SOT23-6 GENERAL DESCRIPTION The ACT4088 is a current-mode step-down DC/DC converter that supplies up to 1.5A into 5V from a 12V input. 1.4MHz switching frequency allows the use of tiny external ponents, and internal loop pensation provides simple, stable power supplies with a minimum of external ponents. Optimized for use with ceramic input and output capacitors, the ACT4088 provides a very pact 1.5A power supply for space constrained mobile and consumer applications. The ACT4088 operates over a wide input voltage range and utilizes current-mode operation to provide excellent line and load transient response while requiring no external pensation ponents. Fault protection includes cycle-by-cycle current limiting, frequency foldback, hiccup mode, and thermal shutdown. Internal soft-start provides a controlled startup with no overshoot, even at light loads. The ACT4088 is available in a tiny SOT23-6 package and requires very few external ponents. 4.5V to 28V ON OFF SW EN FB...