▪ 7V to 80V input supply range
▪ Up to 300mA output current
▪ IQ = 5.5μA at 80V, at no load conditions, switching
▪ IQ = 4.5μA at 80V at no load and no switching
conditions
▪ RAA211803 is fixed 3.3V VOUT, RAA211805 is
fixed 5V VOUT
▪ Minimum on-time of 75ns
▪ Variable frequency operation, frequency
programmed by external inductor (10μH to 33μH)
▪ Pre-bias, monotonic, and smooth start-up
▪ Protections: Overcurrent (OC) Limit, input
Undervoltage Lockout (UVLO), Over-Temperature
Protection (OTP), output Overvoltage Protection
(OVP)
▪ Accurate EN threshold
▪ Package: TSOT23-5 (2.9mm×1.63mm)