TI TPS54061QDRBRQ1

The TPS54061-Q1 is a 60V, 200mA synchronous step-down dc-dc converter with integrated high-side and low-side MOSFETs. Current-mode control simplifies external compensation and provides flexible component selection. Non-switching supply current is 90μA. Use of the enable pin reduces shutdown current to 1.4μA. To improve light-load efficiency, the low-side MOSFET emulates a diode when inductor current reaches zero. The internal UVLO threshold is set at 4.5V, but can be increased using two resistors on the enable pin. An internal soft-start function controls the output voltage ramp-up during startup. The adjustable switching frequency range enables optimization of efficiency and external component size. Frequency foldback and thermal shutdown protect the device under overload conditions. The TPS54061-Q1 achieves a compact design by integrating the MOSFETs and boot recharge diode, while reducing the IC package size to a small 3mm×3mm thermally enhanced VSON package.

• Qualified for automotive applications
  • AEC-Q100 qualified with the following results:
    • Device temperature grade 1: –40°C to 125°C ambient operating temperature range
    • Device HBM ESD classification level H2
    • Device CDM ESD classification level C3B
• Integrated high-side and low-side MOSFETs
• Diode emulation for light-load efficiency
• Peak current mode control
• 90μA operating quiescent current
• 1.4μA shutdown supply current
• 50KHz to 1.1MHz adjustable switching frequency
• Synchronization to external clock
• 0.8V ±1% voltage reference
• Stable operation with ceramic output capacitors or low-cost aluminum electrolytic capacitors
• Cycle-by-cycle current limiting, overtemperature, OVP, and frequency foldback protection
• 3mm × 3mm package with thermal pad
• –40°C to 150°C operating junction temperature

• Low-power standby or bias voltage supply
• High-efficiency alternative to high-voltage linear regulators