Features

• Wide input voltage range of 3V to 40V

• Synchronous operation for high efficiency

• Integrated high-side and low-side NMOS devices

• Selectable PFM or PWM mode at light loads

• Internal fixed frequency (500kHz) or adjustable

switching frequency (300kHz to 2MHz)

• Continuous output current up to 1.1A

• Internal or external soft-start

• Power-good and enable functions

• 500mA low dropout linear regulator

• 1.8V to 6V input

• ±1.8 VOUT accuracy ensured over line, load, and

TJ = -40°C to +125°C

• Very low 45mV dropout voltage at VOUT = 2.5V

• Excellent PSRR over wide frequency range

• Programmable output soft-start time

• Very fast transient response

• Current limit protection