illustrate

The TPS51123 is an effective dual-synchronous buck controller for power supply solutions for laptops, targeting cost. It offers LDO of 5 V and 3.3 - V and requires very few external components. The TPS51123 supports high efficiency, fast transient response, and provides a good signal from a combined power supply. The external audio mode is light-load operation, which can be much higher than the traditional forced PWM work efficiency and low noise. The D-D control with adaptive opening time provides easy and fast operation. The device has a supply input range of 5.5 volts to 28 volts and supports output voltages from 2 to 5.5 V TPS51123 is available in a 24-pin QFN package over an ambient temperature range of -40°C to 85°C.

characteristic

• Wide input voltage range: 5.5 V to 28 V
• Output voltage range: 2 V to 5.5 V
• Built-in 100 mAh LDO and switch 5-V/3.3-V
• Built-in 1%2-V reference voltage output
• Audio ™ mode with/without Out is optional
  Light load and PWM only operate
• Internal 1.6 ms voltage servo soft start
• Adaptive on-time control four architectures
  Selectable frequency settings
• 4500 ppm/° China Resources Deputy Secretary General (ON) current sensing
• Built-in output discharge
• Good power output
• Built-in overvoltage protection/UVP/OCP
• Thermal shutdown (non-latching)
• 24-pin QFN (Certified Geotechnical Engineer) package
• apply
  • laptop
  • I/O power supply
  • System power