SNVU663A June 2019 – May 2021 LP87524-Q1 , LP87524B-Q1 , LP87524J-Q1 , LP87524P-Q1
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.
| Description | Bit name | LP87524B-Q1 | LP87524J-Q1 | LP87524P-Q1 |
|---|---|---|---|---|
| Output voltage | BUCK0_VSET | 3300 mV | 3300 mV | 1000 mV |
| BUCK1_VSET | 1200 mV | 1200 mV | 1200 mV | |
| BUCK2_VSET | 1800 mV | 1000 mV | 1000 mV | |
| BUCK3_VSET | 2300 mV | 1800 mV | 1800 mV | |
| Peak current limit | ILIM0 | 2.5 A | 2.5 A | 4 A |
| ILIM1 | 2.5 A | 2.5 A | 2.5 A | |
| ILIM2 | 5 A | 5 A | 4 A | |
| ILIM3 | 3.5 A | 3.5 A | 3.5 A | |
| Force PWM mode or auto mode | BUCK0_FPWM | Auto | Auto | Force PWM |
| BUCK1_FPWM | Auto | Auto | Force PWM | |
| BUCK2_FPWM | Force PWM | Force PWM | Force PWM | |
| BUCK3_FPWM | Force PWM | Force PWM | Force PWM | |
| Startup and shutdown delay range | DOUBLE_DELAY, HALF_DELAY | 0 ... 15 ms | 0 ... 15 ms | 0 ... 4.8 ms |
| Buck Startup Delays | BUCK0_STARTUP_DELAY | 5 ms | 5 ms | 0.96 ms |
| BUCK1_STARTUP_DELAY | 5 ms | 5 ms | 2.24 ms | |
| BUCK2_STARTUP_DELAY | 2 ms | 2 ms | 1.6 ms | |
| BUCK3_STARTUP_DELAY | 0 ms | 0 ms | 0 ms | |
| Buck Shutdown Delays | BUCK0_SHUTDOWN_DELAY | 0 ms | 0 ms | 0.32 ms |
| BUCK1_SHUTDOWN_DELAY | 0 ms | 0 ms | 0.32 ms | |
| BUCK2_SHUTDOWN_DELAY | 0 ms | 0 ms | 0.32 ms | |
| BUCK3_SHUTDOWN_DELAY | 1 ms | 1 ms | 0.32 ms | |
| GPIO2/3 Startup Delays | GPIO2_STARTUP_DELAY | 5 ms | 5 ms | 2.88 ms |
| GPIO3_STARTUP_DELAY | 3 ms | 3 ms | 4.16 ms | |
| GPIO2/3 Shutdown Delay | GPIO2_SHUTDOWN_DELAY | 0 ms | 0 ms | 0.32 ms |
| GPIO3_SHUTDOWN_DELAY | 0 ms | 0 ms | 0 ms | |
| GPIO output type | GPIO1_OD | Push-pull | Push-pull | Open drain |
| GPIO2_OD | Open drain | Open drain | Open drain | |
| GPIO3_OD | Open drain | Open drain | Open drain | |
| Input or output in GPIO mode | GPIO1_DIR | Input | Input | Output |
| GPIO2_DIR | Output | Output | Output | |
| GPIO3_DIR | Output | Output | Output | |
| Thermal warning level (125°C or 137°C) | TDIE_WARN_LEVEL | 137°C | 137°C | 125°C |