ZHCSL72B October 2016 – July 2021 TPS57114C-Q1
PRODUCTION DATA
- 1 特性
- 2 應用
- 3 說明
- 4 Revision History
- 5 Pin Configuration and Functions
- 6 Specifications
-
7 Detailed Description
- 7.1 Overview
- 7.2 Functional Block Diagram
- 7.3 Feature Description
- 7.4
Device Functional Modes
- 7.4.1 Adjusting the Output Voltage
- 7.4.2 Enable Functionality and Adjusting Undervoltage Lockout
- 7.4.3 Slow-Start or Tracking Pin
- 7.4.4 Sequencing
- 7.4.5 Constant Switching Frequency and Timing Resistor (RT/CLK Pin)
- 7.4.6 Overcurrent Protection
- 7.4.7 Frequency Shift
- 7.4.8 Reverse Overcurrent Protection
- 7.4.9 Synchronize Using The RT/CLK Pin
- 7.4.10 Power Good (PWRGD Pin)
- 7.4.11 Overvoltage Transient Protection
- 7.4.12 Thermal Shutdown
- 7.4.13 Small-Signal Model for Loop Response
- 7.4.14 Simple Small-Signal Model for Peak-Current Mode Control
- 7.4.15 Small-Signal Model for Frequency Compensation
-
8 Application and Implementation
- 8.1 Application Information
- 8.2
Typical Application
- 8.2.1 Design Requirements
- 8.2.2
Detailed Design Procedure
- 8.2.2.1 Selecting the Switching Frequency
- 8.2.2.2 Output Inductor Selection
- 8.2.2.3 Output Capacitor
- 8.2.2.4 Input Capacitor
- 8.2.2.5 Slow-Start Capacitor
- 8.2.2.6 Bootstrap Capacitor Selection
- 8.2.2.7 Output-Voltage And Feedback-Resistor Selection
- 8.2.2.8 Compensation
- 8.2.2.9 Power-Dissipation Estimate
- 8.2.3 Application Curves
- 9 Power Supply Recommendations
- 10Layout
- 11Device and Documentation Support
- 12Mechanical, Packaging, and Orderable Information
6.6 Typical Characteristics
Figure 6-5 Switching Frequency vs RT Resistance, Low-Frequency Range
| V(VIN) = 3.3 V |
| V(VIN) = 5 V | V(EN) = Threshold – 50 mV | |
| TJ = 25°C |
| TJ = 25°C |
| V(VIN) = 5 V |
| RT = 400 kΩ | V(VIN) = 5 V |
| V(VIN) = 3.3 V |
Figure 6-6 Switching Frequency vs V(VSENSE)
| V(VIN) = 3.3 V |
| V(VIN) = 5 V | V(EN) = Threshold + 50 mV | |
| V(VIN) = 5 V |
| V(VIN) = 3.3 V |
| V(VIN) = 3.3 V |
| V(VIN) = 5 V |
| V(VIN) = 5 V | V(SS/TR) = 0.4 V |