Texas Instruments introduces highly-efficient and Low I_Q Buck Converter in 1.5-mm × 2-mm QFN Package

Texas Instruments has introduced the highly-efficient, small, flexible and easy-to-use synchronous step-down DC-DC converter TPS62902. A selectable switching frequency of 2.5 MHz or 1.0 MHz allows the use of small inductors and provides fast transient response. The device supports high V_OUT accuracy of ±1% with DCS-Control topology. The wide input voltage range of 3-V to 17-V supports a variety of nominal inputs, like 12-V supply rails, single-cell or multi-cell Li-Ion, and 5-V or 3.3-V rails.

The TPS62902 can automatically enter power save mode (if auto PFM/PWM is selected) at light loads to maintain high efficiency. Additionally, to provide high efficiency at very small loads, the device has a low typical quiescent current of 4 μA. AEE, if enabled, provides high efficiency across V_IN, V_OUT, and load current. The device includes a S-CONF/MODE input to set the internal/external divider, switching frequency, output voltage discharge, and automatic power save mode or forced PWM operation. The device is available in small 9-pin VQFN package measuring 1.50 mm × 2.00 mm with 0.5-mm pitch.

Features

• High efficiency for wide duty cycle and load range
  • I_Q: 4 μA typical
  • Selectable switching frequency of 2 5 MHz and 1.0 MHz
  • R_DS(ON): 62-mΩ high side, 22-mΩ low side
  • Automatic efficiency enhancement (AEE)
• Small 1.5-mm × 2.0-mm VQFN package with 0.5-mm pitch
• Up to 2-A continuous output current
• ±0.9% feedback voltage accuracy across temp (–40 °C to 150 °C)
• Configurable output voltage options:
  • V_FB external divider: 0.6 V to 5.5 V
  • V_SET internal divider: 16 options between 0.4 V and 5.5 V
• DCS-Control™ topology with 100% mode
• Highly flexible and easy to use
  • Optimized pinout for single-layer routing
  • Precise enable input
  • Forced PWM or auto power save mode
  • Power good output
  • Selectable active output discharge
  • Adjustable soft start and tracking
• No external bootstrap capacitor required

Applications

• Factory automation and control
• Building automation
• Data center and enterprise computing

TPS6290xEVM-069 Evaluation Module.