ETA3421 Datasheet | ETA

DESCRIPTION FEATURES 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. 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 ponents, such as ceramic input and output caps, can also be small due to higher switching frequency. The incorporated 20-100KHz true PWMDimming feature by EN pin can be used to digitally program the LED current. Internal soft-start control circuitry reduces inrush current. Short and open LED protection improves design reliability. ETA3421 is housed in a tiny SOT23-5 package. - Up to 90% Efficiency - 1.5MHz Switching Frequency - 0.1V 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 TYPICAL APPLICATION 4 VIN SW 3 10u F OFF ON 1 EN EN or PWM Dimming FB 5 2.2u H IR LED Rs 10u F ILED(A)=0.1/RS(Ω) ORDERING INFORMATION PART No. ETA3421S2F PACKAGE SOT23-5 TOP MARK Pcs/Reel IZ | YW .etasolution. ETA3421 Rev 1.4 Empower, Transcend, Achieve! PIN CONFIGURATION Top...