5.1 Overview

The TPS659037 device is a power-management integrated circuit (PMIC), available in a 169-pin, 0.8-mm pitch, 12-mm × 12-mm nFBGA package. The TPS659037 device provides seven configurable step-down converter rails, with the ability to combine power rails and supply up to 9 A of output current in multi-phase mode. The TPS659037 device has seven LDOs. The device also has a 12-bit GPADC with three external channels, eight configurable GPIOs, two I²C interface channels or one SPI channel, real-time clock module with calendar function, PLL for external clock sync and phase delay capability, and programmable power sequencer and control for supporting different processors and applications.

The seven step-down converter rails are consisting of nine high frequency switch mode converters with integrated FETs. The step-down converter rails are capable of synchronizing to an external clock input and supports switching frequency between 1.7 MHz and 2.7 MHz. The SMPS12 and SMPS45 are dual-phase step-down converters that can combine with the SMPS3 or SMPS7 respectively and become triple-phase converters. In addition, the SMPS12, SMPS45, SMPS6, and SMPS8 support dynamic voltage scaling by a dedicated I²C interface for optimum power savings.

All of the LDOs support a 0.9 to 3.3-V output with 50-mV step. The regulators are fully controllable by the I²C interface and can be supplied from either a system supply or a preregulated supply.

All LDOs and step-down converters can be controlled by the SPI or I²C interface, or by power request signals. In addition, voltage scaling registers allow transitioning the SMPS to different voltages by SPI, I²C, or roof-and-floor control.

The power-up and power-down controller is configurable and programmable through OTP. The TPS659037 device includes a 32-kHz RC oscillator to sequence all resources during power up and power down. In cases where a fast start-up is required, a 16-MHz crystal oscillator is also included to quickly generate a stable 32-kHz for the system. The TPS659037 device also includes an RTC module which provides date, time, calendar, and alarm capability, which is best used when a 16-MHz crystal or an external and high accuracy 32-kHz clock is present.

The TPS659037 device also has eight configurable GPIOs with a multiplexed feature. Three of the GPIOs, together with the REGEN1 pin can be configured and used as enable signals for external resources, which can be included into the power-up and power-down sequence. The TPS659037 device also includes a general-purpose (GP) sigma-delta analog-to-digital converter (ADC) with three external input channels, which can be used as thermal or voltage and current monitors.