SLVS861F
august 2008 – june 2020
TPS40210-Q1
,
TPS40211-Q1
PRODUCTION DATA
1
Features
2
Applications
3
Description
4
4
Revision History
5
Pin Configuration and Functions
Pin Functions
6
Specifications
6.1
Absolute Maximum Ratings
6.2
ESD Ratings
6.3
Recommended Operating Conditions
6.4
Thermal Information
6.5
Electrical Characteristics
6.6
Timing Requirements
6.7
Switching Characteristics
6.8
Typical Characteristics
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
7.4.1
Setting the Oscillator Frequency
7.4.2
Synchronizing the Oscillator
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
10
Layout
10.1
Layout Guidelines
10.2
Layout Example
11
Device and Documentation Support
11.1
Device Support
11.1.1
Third-Party Products Disclaimer
11.2
Documentation Support
11.2.1
Related Documentation
11.3
Related Links
11.4
Receiving Notification of Documentation Updates
11.5
Support Resources
11.6
Trademarks
11.7
Electrostatic Discharge Caution
11.8
Glossary
12
Mechanical, Packaging, and Orderable Information
69
1
Features
Qualified for automotive applications
AEC-Q100 qualified with the following results:
Device temperature grade 1: –40°C to 125°C ambient operating temperature range
Device HBM ESD classification level 2
Device CDM ESD classification level C4B
Functional Safety-Capable
Documentation available to aid functional safety system design
For boost, flyback, SEPIC, LED driver applications
Wide input operating voltage: 4.5 V to 52 V
Adjustable oscillator frequency
Fixed-frequency current-mode control
Internal slope compensation
Integrated low-side driver
Programmable closed-loop soft start
Overcurrent protection
External synchronization capable
Reference voltage: 700 mV (TPS40210-Q1),
260 mV (TPS40211-Q1)
Low-current disable function