• Buck mode: input voltage range 3V to 40V (See “Input

Voltage” for more details)

• Boost mode expands operating input voltage lower than

2.5V (See “Input Voltage” for more details)

• Selectable Forced PWM mode or PFM mode

• 300μA IC quiescent current (PFM, no load); 180μA input

quiescent current (PFM, no load, VOUT tied to AUXVCC)

• Less than 5μA (MAX) shutdown input current (IC disabled)

• Operational topologies

- Synchronous buck

- Non-synchronous buck

- Two-stage boost buck

- Non-inverting single inductor buck boost

• Programmable frequency from 200kHz to 2.2MHz and

frequency synchronization capability

• ±1% tight voltage regulation accuracy

• Reliable overcurrent protection

- Temperature compensated current sense

- Cycle-by-cycle current limiting with frequency foldback

- Hiccup mode for worst case short condition

• 20 Ld 4x4 QFN package

• Pb-free (RoHS compliant)