• 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)