SLVSDV6C November 2017 – November 2019
PRODUCTION DATA.
- 1 Features
- 2 Applications
- 3 Description
- 4 Revision History
- 5 Device Comparison Table
- 6 Pin Configuration and Functions
- 7 Specifications
- 8 Detailed Description
- 9 Application and Implementation
- 10Power Supply Recommendations
- 11Layout
- 12Device and Documentation Support
- 13Mechanical, Packaging, and Orderable Information
8.4.3 Minimum Duty Cycle and 100% Mode Operation
There is no limitation for small duty cycles, since even at very low duty cycles the switching frequency is reduced as needed to always ensure a proper regulation.
If the output voltage level comes close to the input voltage, the device enters 100% mode. While the high-side switch is constantly turned on, the low-side switch is switched off. The difference between VIN and VOUT is determined by the voltage drop across the high-side FET and the dc resistance of the inductor. The minimum VIN that is needed to maintain a specific VOUT value is estimated as:
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Equation 3. 
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