描述 Description

Qorvo's ACT4088 is a current-mode step-down DC/DC converter that supplies up to 1.5 A into 5 V from a 12 V input. The 1.4 MHz switching frequency allows the use of tiny external components and internal loop compensation provides simple, stable power supplies with a minimum of external components.
Optimized for use with ceramic input and output capacitors, ACT4088 provides a very compact 1.5 A power supply for space-constrained mobile and consumer applications. The product operates over a wide input voltage range and utilizes current-mode operation to provide excellent line and load transient response while requiring no external compensation components. 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.
ACT4088 is available in a tiny SOT23-6 package and requires very few external components.

特性 Features

? Wide 4.5 to 28 V input voltage range
? 1.5 A output current (12 Vin to 5 Vout)
? Output adjustable down to 0.81 V
? 0.3 Ohm internal power MOSFET
? Up to 92% efficiency
? Stable with low ESR ceramic capacitors
? Fixed 1.4 MHz operating frequency
? Internal soft-start function
? Over-current protection with hiccup mode
? Thermal shutdown

應(yīng)用 Application

? TFT LCD Monitors
? Portable DVD Players, Headphones, MP3 Players, etc.
? Car-Powered or Battery-Powered Equipment
? Set-Top Boxes
? Telecom Power Supplies
? DSL and Cable Modems and Routers