illustrate

The TPS51117 is a cost-effective, POL regulated synchronous buck controller for laptop applications. The controller is specifically designed for D-D mode operation with adaptive on-time, providing ease of use, a small number of external components, and fast transient response. Automatically skip the high-efficiency drop to the milliamp load range, or low-noise PWM operation read-only mode mode selection.

The current detection overcurrent is positive, negative overcurrent is not lost, and the low side of the R DS(ON) detection and temperature compensation are guaranteed. The device receives 5 V (4.5 V to 5.5 V) from another regulated power supply, such as TPS51120 or TPS51020. The converted input can be VBAT or 5 V supply, ranging from 1.

characteristic

• High efficiency, low power consumption, typical shutdown current of 4.5μA
• Fixed frequency emulation on-time control with adjustable range from 100 kHz to 550 kHz
• ð - Mode 100™ - Load step response of ns
• "1% initial reference accuracy
• Output voltage range: 0.75 V to 5.5 V
• Wide input voltage range: 1.8 V to 28 V
• Auto-Skip/PWM-Only operation is available
• Temperature-compensated (4500 ppm/°C) low-side R DS (upper) overcurrent detection
• Negative overcurrent limit
• Integrated boost diode
• Integrated overvoltage protection/UVP and thermal shutdown
• Good power signal
• Internal 1.2 ms voltage soft-start
• Integrated Output Discharge (Softstop)
• apply
  • laptop
  • I/O power supply
  • System power