器件名称: ACT4082A
功能描述: 16V, 1.2A, 1.4MHz Step-Down DC/DC Converter in SOT23-6
文件大小: 425.71KB 共11页
简 介:Active-Semi
FEATURES
Wide 4.5V to 16V Input Voltage Range 1.2A Output Current (12VIN to 5VOUT) Output Adjustable Down to 0.81V 0.3 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
ACT4082A
Rev0, 16-May-08
16V, 1.2A, 1.4MHz Step-Down DC/DC Converter in SOT23-6 GENERAL DESCRIPTION
The ACT4082A is a current-mode step-down DC/DC converter that supplies up to 1.2A into 5V from a 12V input. 1.4MHz 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, the ACT4082A provides a very compact 1.2A power supply for space constrained mobile and consumer applications. The ACT4082A 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 fold-back, hiccup mode, and thermal shutdown. Internal soft-start provides a controlled startup with no overshoot, even at light loads. The ACT4082A is available in a tiny SOT23-6 package and requires very few external components.
APPLICATIONS
TFT LCD Monitors Portable DVDs, Headphon……
