SNVU663A June   2019  – May 2021 LP87524-Q1 , LP87524B-Q1 , LP87524J-Q1 , LP87524P-Q1

 

  1.   Trademarks
  2. 1Introduction
  3. 2Setup
    1. 2.1 SCL/SDA Pins
    2. 2.2 NRST Pin
    3. 2.3 ENx (GPIOx) Pins
    4. 2.4 nINT
  4. 3Configuration
    1. 3.1 Default OTP Configurations
      1. 3.1.1 LP87524B-Q1 OTP Configuration
        1. 3.1.1.1 Startup and Shutdown Sequence
      2. 3.1.2 LP87524J-Q1 OTP Configuration
        1. 3.1.2.1 Startup and Shutdown Sequence
      3. 3.1.3 LP87524P-Q1 OTP Configuration
        1. 3.1.3.1 Startup and Shutdown Sequence
  5. 4References
  6. 5Revision History

3.1 Default OTP Configurations

All LP87524B/J/P-Q1 PMIC resource settings are stored in the form of volatile registers. These settings define, for example, buck output voltages, GPIO functionality, and power-up and power-down sequences. Refer to the datasheet for a full list of the setting registers.

Each device has predefined values stored in OTP which control the default configuration of the device. The tables in this section list the OTP-programmed values for each device.

Table 3-1 summarizes the main differences between the three OTP versions. Table 3-2 shows LP87524B-Q1, Table 3-8 shows LP87524J-Q1 and Table 3-14 shows LP87524P-Q1 settings for BUCK0, BUCK1, BUCK2 and BUCK3. Maximum allowed slew-rate for BUCKx depends on the output capacitance. Refer to the device datasheets for output capacitance boundary conditions.

Table 3-1 Differences between LP87524B/J/P-Q1 devices
DescriptionBit nameLP87524B-Q1LP87524J-Q1LP87524P-Q1
Output voltageBUCK0_VSET3300 mV3300 mV1000 mV
BUCK1_VSET1200 mV1200 mV1200 mV
BUCK2_VSET1800 mV1000 mV1000 mV
BUCK3_VSET2300 mV1800 mV1800 mV
Peak current limitILIM02.5 A2.5 A4 A
ILIM12.5 A2.5 A2.5 A
ILIM25 A5 A4 A
ILIM33.5 A3.5 A3.5 A
Force PWM mode or auto modeBUCK0_FPWMAutoAutoForce PWM
BUCK1_FPWMAutoAutoForce PWM
BUCK2_FPWMForce PWMForce PWMForce PWM
BUCK3_FPWMForce PWMForce PWMForce PWM
Startup and shutdown delay rangeDOUBLE_DELAY, HALF_DELAY0 ... 15 ms0 ... 15 ms0 ... 4.8 ms
Buck Startup DelaysBUCK0_STARTUP_DELAY5 ms5 ms0.96 ms
BUCK1_STARTUP_DELAY5 ms5 ms2.24 ms
BUCK2_STARTUP_DELAY2 ms2 ms1.6 ms
BUCK3_STARTUP_DELAY0 ms0 ms0 ms
Buck Shutdown DelaysBUCK0_SHUTDOWN_DELAY0 ms0 ms0.32 ms
BUCK1_SHUTDOWN_DELAY0 ms0 ms0.32 ms
BUCK2_SHUTDOWN_DELAY0 ms0 ms0.32 ms
BUCK3_SHUTDOWN_DELAY1 ms1 ms0.32 ms
GPIO2/3 Startup DelaysGPIO2_STARTUP_DELAY5 ms5 ms2.88 ms
GPIO3_STARTUP_DELAY3 ms3 ms4.16 ms
GPIO2/3 Shutdown DelayGPIO2_SHUTDOWN_DELAY0 ms0 ms0.32 ms
GPIO3_SHUTDOWN_DELAY0 ms0 ms0 ms
GPIO output typeGPIO1_ODPush-pullPush-pullOpen drain
GPIO2_ODOpen drainOpen drainOpen drain
GPIO3_ODOpen drainOpen drainOpen drain
Input or output in GPIO modeGPIO1_DIRInputInputOutput
GPIO2_DIROutputOutputOutput
GPIO3_DIROutputOutputOutput
Thermal warning level (125°C or 137°C)TDIE_WARN_LEVEL137°C137°C125°C