ZHCSIG5E July 2018 – August 2021 TPS63805 , TPS63806 , TPS63807
PRODUCTION DATA
- 1 特性
- 2 应用
- 3 说明
- 4 Revision History
- 5 说明（续）
- 6 Device Comparison Table
- 7 Pin Configuration and Functions
- 8 Specifications
-
9 Detailed Description
- 9.1 Overview
- 9.2 Functional Block Diagram
- 9.3
Feature Description
- 9.3.1 Control Loop Description
- 9.3.2 Precise Device Enable: Threshold- or Delayed Enable
- 9.3.3 Mode Selection (PFM/PWM)
- 9.3.4 Undervoltage Lockout (UVLO)
- 9.3.5 Soft Start
- 9.3.6 Adjustable Output Voltage
- 9.3.7 Overtemperature Protection - Thermal Shutdown
- 9.3.8 Input Overvoltage - Reverse-Boost Protection (IVP)
- 9.3.9 Output Overvoltage Protection (OVP)
- 9.3.10 Power-Good Indicator
- 9.4 Device Functional Modes
- 10Application and Implementation
- 11Power Supply Recommendations
- 12Layout
- 13Device and Documentation Support
- 14Mechanical, Packaging, and Orderable Information
9.4.1.4 Buck Operation
When VI is greater than VO (and the voltages are not close enough to trigger buck-boost operation), the TPS63805, TPS63806, and TPS63807 operate in buck mode where the buck high-side and low-side switches are active. The boost high-side switch is always turned on and the boost low-side switch is always turned off. This lets the TPS63805, TPS63806, and TPS63807 operate as a classical buck converter.
Figure 9-9 Peak-Current Buck Operation