SLVS861F august 2008 – june 2020 TPS40210-Q1 , TPS40211-Q1
PRODUCTION DATA
- 1 Features
- 2 Applications
- 3 Description
- 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
- 7.3.1 Minimum On-Time and Off-Time Considerations
- 7.3.2 Current Sense and Overcurrent
- 7.3.3 Current Sense and Subharmonic Instability
- 7.3.4 Current Sense Filtering
- 7.3.5 Soft Start
- 7.3.6 BP Regulator
- 7.3.7 Shutdown (DIS/ EN Pin)
- 7.3.8 Control Loop Considerations
- 7.3.9 Gate Drive Circuit
- 7.3.10 TPS40211-Q1
- 7.4 Device Functional Modes
-
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 Duty Cycle Estimation
- 8.2.2.2 Inductor Selection
- 8.2.2.3 Rectifier Diode Selection
- 8.2.2.4 Output Capacitor Selection
- 8.2.2.5 Input Capacitor Selection
- 8.2.2.6 Current Sense and Current Limit
- 8.2.2.7 Current Sense Filter
- 8.2.2.8 Switching MOSFET Selection
- 8.2.2.9 Feedback Divider Resistors
- 8.2.2.10 Error Amplifier Compensation
- 8.2.2.11 R-C Oscillator
- 8.2.2.12 Soft-Start Capacitor
- 8.2.2.13 Regulator Bypass
- 8.2.3 Application Curves
- 9 Power Supply Recommendations
- 10Layout
- 11Device and Documentation Support
- 12Mechanical, Packaging, and Orderable Information
6.8 Typical Characteristics
Figure 6-1 Frequency vs Timing Resistance
Figure 6-3 Quiescent Current vs Junction Temperature
Figure 6-5 Reference Voltage Change vs Junction Temperature
Figure 6-7 Undervoltage Lockout Threshold vs Junction Temperature
Figure 6-9 Overcurrent Threshold vs Input Voltage
Figure 6-11 Oscillator Amplitude vs Junction Temperature
Figure 6-13 FB Bias Current vs Junction Temperature
Figure 6-15 Compensation Sink Current vs Junction Temperature
Figure 6-17 Regulator Voltage vs Junction Temperature
Figure 6-19 Current-Sense Amplifier Gain vs Junction Temperature
Figure 6-2 Switching Frequency vs Duty Cycle
Figure 6-4 Shutdown Current vs Junction Temperature
Figure 6-6 Reference Voltage Change vs Input Voltage
Figure 6-8 Overcurrent Threshold vs Junction Temperature
Figure 6-10 Switching Frequency Change vs Junction Temperature
Figure 6-12 Soft-Start Charge and Discharge Resistance vs Junction Temperature
Figure 6-14 Compensation Source Current vs Junction Temperature
Figure 6-16 Valley Voltage Change vs Junction Temperature
Figure 6-18 DIS/
EN Turn-On Threshold vs Junction Temperature