SNVU851A November   2023  – January 2024

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Top View with Basic External Connections
  5. 2Input, Output Voltages, and Load Current Requirements
  6. 3Jumpers and Connectors
    1. 3.1 Test Points
  7. 4Getting Started
    1. 4.1 GUI
    2. 4.2 GUI Installation and Working with GUI
  8. 5Watchdog Configuration
  9. 6Schematics, Layout and BOM
    1. 6.1 Schematic Diagram
    2. 6.2 PCB Layer Diagram
    3. 6.3 Bill of Materials
  10. 7Revision History

2 Input, Output Voltages, and Load Current Requirements

LP87725-Q1 device works with 3.3 V input supply and supply is internally monitored for undervoltage (UV) and overvoltage (OV) conditions, therefore, keep the input supply voltage within range specified in Table 2-1 to avoid input supply UV/OV detection.

  • If the VBAT/preregulator path is used (default configuration), then the input supply to the device is already regulated to 3.3 V.
  • If an external 3.3 V supply is used, then verify that input supply voltage is always within the recommended voltage range and drop across supply path must be considered.
  • If the EVM is configured to work with USB supply, then regulators must not be loaded.

Table 2-1 lists the input and output voltage for each regulator and the maximum load current requirements. Refer to LP87725-Q1 device data sheet for more information about device electrical characteristics and the features.

Table 2-1 Input and Output Voltages, and Load Current Requirements
Regulator NameInput Supply Voltage at PMIC Supply PinOutput VoltageMaximum Load Current
BUCK13.1 V - 3.49 V1.8 V3.5 A
BUCK23.1 V - 3.49 V1.0 V3.5 A
BUCK33.1 V - 3.49 V1.2 V3.5 A
LDO_LS13.1 V - 3.49 V1.0 V0.6 A
LS23.1 V - 3.49 V3.1 V - 3.49 V0.4 A

If all the regulators are loaded with maximum load current simultaneously, then PMIC and PCB can become hot. Make sure that PMIC junction temperature does not exceed 150 °C.