▪ 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)