供应ETA3421B可替代PAM2804

ETA3421B 0.7A, 1.5MHz降压恒流，高效率

0.7A, 1.5MHz Step-Down Constant Current, High Efficiency
The ETA3421 is a high-efficiency, DC-to-DC step-down constant current LED driver, capable of delivering up to 0.7A of output current. The device operates from an input voltage range of 3.3V to 5.5V and use 0.1V FB voltage to achieve high efficiency.

Features
Up to 90% Efficiency
5MHz Switching Frequency
1V FB Voltage
True PWM Current Program
Open LED Protection
Short LED Protection
Tiny SOT23-5 Package

Applications
IP CAM
1 Cell Li-Ion Battery Powered Flashlight

应用电路图：