• 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
• 90-µA Operating Quiescent Current
• 1.4-µA Shutdown Supply Current
• 50-kHz to 1.1-MHz Adjustable Switching Frequency
• Synchronizes to External Clock
• 0.8 V ±1% Voltage Reference
• Stable With Ceramic Output Capacitors or LowCost Aluminum Electrolytic
• Cycle-by-Cycle Current Limit, Thermal, OVP, and Frequency Foldback Protection
• 3-mm x 3-mm, 8-Pin SON Package With Thermal Pad
• –40°C to 150°C Operating Junction Temperature
Applications
• Low-Power Standby or Bias Voltage Supplies
• High-Efficiency Replacement for High-Voltage Linear Regulators
Description
The TPS54061-Q1 device is a 60-V,200-mA. 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. The non-switching supply current is 90 μA.Using the enable pin reduces the shutdown supply current to 1.4 μA.
To increase light-load efficiency,the low-side MOSFET emulates a diode when the inductor current reaches zer0.
The internal undervoltage lockout setting is 4.5 V, but using two resistors on the enable pin can increase the setting. The internal slow-start time controls the output-voltage start-up ramp.
The adjustable switching-frequency range allows optimization of efficiency and external component size. Frequency foldback and thermal shutdown protect the part during an overload condition.
The TPS54061-Q1enables smal designs by integrating the MOSFETs and boot recharge diode, and by minimizing the IC footprint with a small 3-mm ×3-mm thermally-enhanced SON package.
The TPS54061-Q1 is supported in the WEBENCHm Designer at www.ti.com.
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