1 Features

• Integrated High-Side and Low-Side MOSFET

• Peak Current Mode Control

• Diode Emulation for Improved Light-Load

Efficiency

• 89 μA (typical) Operating Quiescent Current

• 100-kHz to 400-kHz Adjustable Switching

Frequency

• Synchronizes to External Clock

• Internal Slow-Start

• 0.8 V ±2% Voltage Reference

• Stable with Ceramic Output Capacitors or Low-

Cost Aluminum Electrolytic

• Cycle-by-Cycle Current Limit, Thermal and

Frequency Foldback Protection

• MSOP-8 and 3mm × 3mm VSON-8 Packages

2 Applications

• Low-Power Standby or Bias Voltage Supplies

• 4-20 mA Current-Loop Powered Sensors

• Industrial Process Control, Metering, and Security

Systems

• High Voltage Linear Regulator Replacement

3 Description

The TPS54062 device is a 60-V, 50-mA, synchronous

step-down 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 89 μA.

Using the enable pin, shutdown supply current is

reduced to 1.7 μA.

Undervoltage lockout is internally set at 4.5 V, but

can be increased using the accurate enable pin

threshold. The output voltage start-up ramp is

controlled by the internal slow-start time.

Adjustable switching frequency range allows

efficiency and external component size to be

optimized. Frequency foldback and thermal shutdown

protects the part during an overload condition.