SNVU596A October   2018  – July 2025 LP87521-Q1 , LP87522-Q1 , LP87523-Q1 , LP87524-Q1 , LP87525-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Setup
    1. 2.1 SCL/SDA Pins
    2. 2.2 NRST Pin
    3. 2.3 ENx (GPIOx) Pins
    4. 2.4 nINT
  6. 3Configuration
    1. 3.1 Configuration Sequence
    2. 3.2 Default OTP Configurations
    3. 3.3 Recommended Order of Configuring Registers Through I2C
      1. 3.3.1 Voltage Settings
      2. 3.3.2 Other Regulator Settings
      3. 3.3.3 GPO Settings
      4. 3.3.4 Clock Sync Functions
      5. 3.3.5 PGOOD Settings
      6. 3.3.6 Interrupt Settings
      7. 3.3.7 Startup and Shutdown Sequence
      8. 3.3.8 Set ENx Pin Control Bits
      9. 3.3.9 Set EN_BUCKx Bits
  7. 4Revision History

3.3.1 Voltage Settings

The default voltage settings for the bucks are OTP-dependent. Refer to the device TRM for the default values. Change the default voltage settings by writing to the respective fields listed below. To see how the values of these registers correspond to different voltages, see the device-specific data sheet. Depending on phase configuration, only master buck voltage needs to be set.

  • BUCK0_VSET field in BUCK0_VOUT register
  • BUCK1_VSET field in BUCK1_VOUT register
  • BUCK2_VSET field in BUCK2_VOUT register
  • BUCK3_VSET field in BUCK3_VOUT register