PAM2803
Features n LED Power Efficiency: up to 90% n Current Accuracy: ± 5%(V IN=3.6V to 1.8V @V F=3.7V) n Low Start-Up Voltage: 0.9V(I LED=270m A) n Low Hold Voltage:0.75V(I LED=200m A) n 1MHz Switching Frequency n Uses small, Low Profile External ponents n Low RDS(ON) : 100mΩ (TYP.) n Open LED Protection n Over Temperature Protection n Low Profile SOT-23-6 Package n Pb-Free Package
General Descriptio n
The PAM2803 is a set-up DC-DC converter that delivers a regulated output current. The device switches at a 1.0MHz constant frequency, allowing for the use of small value external inductor and ceramic capacitors. The PAM2803 is targeted to be used for driving loads up to 1A from a two-cell alkaline battery. The LED current can be programmed by the external current sense resistor, Rs, connected between the feedback pin (FB) and ground. A low 95m V feedback voltage reduces the power loss in the Rs for better efficiency. With its internal 2A, 100 mΩ NMOS switch, the device can provide high...
