TMI32120

A high integrated synchronous step-down converter with up to 12A output current capability and input voltage range from 4.5V to 18V. Adopts advance COT control mode and has fast transient response performance that could reduce external component count. Integrates very low RDS(ON) MOSFETs and offers high accurate reference voltage. Offers many selectable functions which supports different application requirements by setting external components flexibly. PFM operation mode provides high efficiency in light load condition and FPWM operation mode has better output voltage regulation accuracy. Selectable switching frequency provides wide application range to trade off efficiency, solution size and cost. Selectable current limit and programmable soft-start time help to control power up inrush current. Robust protections are integrated including cycle-by-cycle current limit, output UVP, input UVLO and OTP functions. Available in QFN3.5x3.5-18 package.

Applications

• Wireless and Networking Infrastructure
• Server, Storage Equipment
• High End Digital Smart TV

Key features

• Input Voltage Range: 4.5V to 18V
• Integrated 9.4mΩ and 4.3mΩ MOSFETs
• 0.6V±1 % Reference Voltage Accuracy
• Output Voltage Adjustable from 0.6V to 5.5V
• Advanced COT Control for Fast Transient Response
• Selectable FPWM or PFM Operation Mode
• Selectable 400kHz, 800kHz and 1.2MHz Switching Frequency
• Selectable Two Level Current Limit Value
• Support Ceramic Output Capacitors
• Programmable Soft-start Time with a Default 1ms Soft-start Time
• Thermal Shutdown
• Output Auto-Discharge in EN Shutdown
• Available in QFN3.5x3.5-18 Package