SNVAA42 April   2022 LMR33620 , LP5907 , TLV702 , TPS3840 , TPS62260 , TPS65000

 

  1.   Trademarks
  2. 1Introduction
  3. 2Power Solutions
    1. 2.1 Discrete Power
    2. 2.2 Discrete Power with Voltage Supervisor
    3. 2.3 Integrated Power with Camera Module PMIC

2.2 Discrete Power with Voltage Supervisor

An alternative to adding capacitance is implementing a voltage supervisor, for example TI's TPS3840 or TPS3808, as shown in Figure 2-2. The supervisor RESET pin is used to enable and disable the LDO supplying DVDD 1.2 V. This process allows DVDD 1.2 V to power down first without the need for additional capacitors. The increase to the solution size is reduced, but not minimized, and the supervisor still results in a cost increase.

Figure 2-2 Discrete Power Tree with Supervisor