3.3V to 1.8V and 0.9V step-down DC-DC converter

Key Features

• 3.3V to 1.8V with 200mA maximum load current step-down DC-DC
• 3.3V to 0.9V with 300mA maximum load current step-down DC-DC
• Peak-current mode control with ramp compensation
• Pulse frequency modulation (PFM) mode for improved efficiency at small load currents.
• Over temperature protection (OVLO), input under voltage protection (UVLO)
• Over output voltage protection
• Softstart to avoid inrush current
• Audio avoidance to keep PFM switching out of audio frequency range
• 2.5V to 3.8V input range
• Outputs programmability (±5%)
• Programmable current limit
• Bandgap reference with <2% accuracy and <0.5mV/V supply rejection
• EMI reduction modes with FMCW/Pseudo-random modulation
• 90.5% efficiency at 180mA for 0.9V DC-DC
• 95.1% efficiency at 120mA for 1.8V DC-DC
• 28nm TSMC CMOS technology

Block Diagram

Technical Specifications