SDAA263 June   2026 TPS55289 , TPS55289-Q1 , TPS552892-Q1

1.   1
2.   Abstract
3.   Trademarks
4. 1E-latch System Introduction
   1. 1.1 Supercapacitor Characteristic
   2. 1.2 Typical Block Diagram of E-latch System
5. 2 Supercapacitor Charging with Buck-boost Converter Based on CC/CV Control
   1. 2.1 Advantages of CC/CV Regulators for Supercapacitor Charging
   2. 2.2 Buck-Boost Dual-Loop With CC/CV
   3. 2.3 Output Current Monitoring
6. 3Design Process
   1. 3.1 TPS5528x Family Part Selection
      1. 3.1.1 Current Capability
      2. 3.1.2 I2C Version and Non-I2C Version
      3. 3.1.3 Part Selection
   2. 3.2 Charge Voltage and Charge Current Setting
7. 4Experimental Results
8. 5Summary
9. 6References