JAJSOZ4A June 2023 – June 2024 TPS6521905
PRODUCTION DATA
The TPS6521905 provides three step-down converters, four LDOs, three general-purpose I/Os and three multi-Function pins. The system can be supplied by a single cell Li-Ion battery, two primary cells or a regulated supply. The device is characterized across a -40°C to +105°C temperature range, which makes the PMIC an excellent choice for various industrial applications.
The I2C interface provides comprehensive features for using TPS6521905. All rails, the GPOs and the GPIO can be enabled or disabled. Voltage thresholds for the undervoltage monitoring can be customized.
The integrated voltage supervisor monitors Buck 1–3 and LDO1–4 for undervoltage. The monitor has two sensitivity settings. A power good signal is provided to report the successful ramp of the power rails and GPIOs. The nRSTOUT pin is pulled low until the device enters ACTIVE state. When powering down from ACTIVE- or STBY-state, nRSTOUT is pulled low again. The nRSTOUT pin has an open-drain output. A fault-pin, nINT, notifies the SoC about faults.
Buck1 step-down converter can supply up to 3.5 A of current, Buck2 and Buck3 can supply up to 2 A each. The default output voltages for each converter can be adjusted through the I2C interface. All three buck-converters feature dynamic voltage scaling. The step-down converters operate in a low power mode at light load or can be forced into PWM operation for noise sensitive applications.
LDO1 and LDO2 support output currents of 400 mA at an output voltage range of 0.6 V to 3.4 V. These LDOs support bypass mode, acting as a load-switch, and allow voltage-changes during operation for applications like SD-card-supply, adjusting the IO-supply of the SD-card from 3.3 V to 1.8 V after initialization.
LDO3 and LDO4 support output currents of 300 mA at an output voltage range of 1.2 V to 3.3 V. These LDOs support load-switch-mode, but not bypass mode.
The I2C-interface, IOs, GPIOs, and multi-function-pins (MFP) allow a seamless interface to a wide range of SoCs.
All configurations of the rails, for example output-voltages, sequencing, are backed up by EEPROM. Please refer to the Technical Reference Manual (TRM) of the chosen configuration.