ZHCSP18A November 2021 – June 2022 TPS22953-Q1 , TPS22954-Q1
PRODUCTION DATA
- 1 特性
- 2 应用
- 3 说明
- 4 Revision History
- 5 Device Comparison Table
- 6 Pin Configuration and Functions
-
7 Specifications
- 7.1 Absolute Maximum Ratings
- 7.2 ESD Ratings
- Recommended Operating Conditions
- 7.3 Thermal Information
- 7.4 Electrical Characteristics
- 7.5 Electrical Characteristics – VBIAS = 5 V
- 7.6 Electrical Characteristics – VBIAS = 3.3 V
- 7.7 Electrical Characteristics – VBIAS = 2.5 V
- 7.8 Switching Characteristics – CT = 1000 pF
- 7.9 Switching Characteristics – CT = 0 pF
- 7.10 Typical DC Characteristics
- 7.11 Typical Switching Characteristics
- 8 Parameter Measurement Information
-
9 Detailed Description
- 9.1 Overview
- 9.2 Functional Block Diagram
- 9.3
Feature Description
- 9.3.1 On and Off Control (EN Pin)
- 9.3.2 Voltage Monitoring (SNS Pin)
- 9.3.3 Power Good (PG Pin)
- 9.3.4 Supervisor Fault Detection and Automatic Restart
- 9.3.5 Manual Restart
- 9.3.6 Thermal Shutdown
- 9.3.7 Reverse Current Blocking (TPS22953-Q1 Only)
- 9.3.8 Quick Output Discharge (QOD) (TPS22954-Q1 Only)
- 9.3.9 VIN and VBIAS Voltage Range
- 9.3.10 Adjustable Rise Time (CT Pin)
- 9.3.11 Power Sequencing
- 9.4 Device Functional Modes
- 10Application and Implementation
- 11Power Supply Recommendations
- 12Layout
- 13Device and Documentation Support
- 14Mechanical, Packaging, and Orderable Information
10.1.3 Automatic Power Sequencing
The PG pin of the TPS2295x-Q1 allows for automatic sequencing of multiple system rails or loads. The accurate SNS voltage monitoring ensures the first rail is up before the next starts to turn on. This approach provides robust system sequencing and reduces the total inrush current by preventing overlap. Figure 10-1 shows how two rails can be sequenced. There is no limit to the number of rails that can be sequenced in this way.
Figure 10-1 Power Sequencing with PG Control
Schematic