1A 1.5MHz降压转换器--AT7170/AT7170E

一 概述 

The AT7170/AT7170E is a high-efficiency,DC-to-DC step-down switching regulator, capable of delivering up to 1A of output current. The devices operate from an input voltage range of 2.6V to 5.5V and provide output voltages from 0.6V to VIN,making the AT7170/AT7170E ideal for low voltage power conversions. Running at a fixed frequency of 1.5MHz allows the use of small inductance value and low DCR inductors, thereby achieving higher efficiencies. Other external components, such as ceramic input and output caps, can also be small due to higher switching frequency, while maintaining exceptional low noise output voltages. Built-in EMI reduction circuitry makes this converter ideal power supply for RF applications. Internal soft-start control circuitry reduces inrush current. Short-circuit and thermal-overload protection improves design reliability.
AT7170/AT7170E is housed in a tiny SOT25 &TDFN2×2-6L package.

二 特性

2.6V to 5.5V input voltage range
Output Adjustable from 0.6V to VIN
280/200m? Internal Power MOSFET Switch
Stable with Low ESR Output Ceramic Capacitors
Up to 95% Efficiency
Less than 1µA Shutdown Current
1.5Mhz Switching Frequency
Thermal Shutdown Protection
Current limit and short circuit protections.
Available in SOT-25 & TDFN2×2-6L Pb-Free Package
Build-in soft start function

三 应用

MIDs, Tablet PC
Set Top Boxes
USB ports/Hubs
Hot Swaps
Cellphones

四 封装

五 应用电路图