TPS54061DRBT

The TPS54061 is a 60V, 200mA synchronous step-down DC-DC converter with integrated high-side and low-side MOSFETs. Current-mode control provides simple external compensation and flexible component selection. Non-switching supply current is 90μA. Using the enable pin reduces shutdown supply current to 1.4μA. To improve efficiency under light-load conditions, the low-side MOSFET acts as a diode when the inductor current reaches 0. UVLO is internally set to 4.5V but can be raised using resistors on the two enable pins. The output voltage startup ramp is controlled by an internal soft-start timer. An adjustable switching frequency range enables high efficiency and optimization of external component size. Frequency foldback and thermal shutdown protect components under overload conditions. The TPS54061 integrates MOSFETs and a bootstrap recharge diode, and minimizes IC package size through a compact 3.00mm×3.00mm thermally enhanced VSON package, enabling small designs.

Applications

• 4mA to 20mA current loop powered sensors
• Low-power standby or bias voltage supply
• Industrial process control, instrumentation, and safety systems
• High-efficiency alternative to high-voltage linear regulators

Key features

• Diode emulation peak current mode control with integrated high-side and low-side MOSFETs for improved light-load efficiency
• 90μA operating quiescent current, 1.4μA shutdown supply current
• Adjustable switching frequency range: 50kHz to 1100kHz
• Synchronizable to external clock
• Internal soft-start
• 0.8V ±1% voltage reference
• Stable operation with ceramic output capacitors or low-cost aluminum electrolytic capacitors
• Cycle-by-cycle current limiting, over-temperature, OVP, and frequency foldback protection
• 3mm×3mm VSON-8 package with thermal pad
• Operating junction temperature range: -40°C to 150°C