SLVAG34 August   2026 TPS650362-Q1 , TPS65219-Q1 , TPS65224-Q1

 

  1.   1
  2.   Abstract
  3. 1Introduction
  4. 2Causes of PMICs Failing to Resume Operation Due to Slow Voltage Ramp Tests
    1. 2.1 Two Input Undervoltage Lockout (UVLO) Mechanisms of PMICs
    2. 2.2 Repeated PVIN_B1_UVLO Triggers Force the PMIC into WT_PWR_REC State
    3. 2.3 Reasons Why Slow Voltage Ramp Causes the PMIC to Enter WT_PWR_REC State
  5. 3Common Solutions for Wide-Input PMICs
    1. 3.1 Increase the Gap Between PVIN_B1_UVLO Rising and Falling
    2. 3.2 Replace Reverse-Polarity Protection Diode with an Ideal Diode
    3. 3.3 TPS650362-Q1 Can Use Resistive Discharge Instead of Active Discharge
  6. 4Common Solutions for Low-Input PMICs
    1. 4.1 Adjusting Primary BUCK Loop Stability
    2. 4.2 Prevent Primary BUCK from Entering Dropout Mode During Slow Ramp Testing
  7. 5Non-Functional Safety Systems Can Disable/Mask RECOV_CNT_THR to Avoid Entering SAFE/OFF States
  8. 6References
Application Note

How to Resolve the Issue of PMICs Failing to Resume Operation During Slow Voltage Ramp Tests?