5.1 Overview

The TPS65916 device is an integrated power-management integrated circuit (PMIC), available in a 48-pin, 0.5-mm pitch, 7-mm × 7-mm QFN package. It provides five configurable step-down converter rails, with two of the rails having the ability to combine power rails and supply up to 7A of output current in multi-phase mode. The TPS65916 device also provides five external LDO rails. It also comes with a 12-bit GPADC with two external channels, seven configurable GPIOs, two I²C interface channels or one SPI interface channel, PLL for external clock sync and phase delay capability, and programmable power sequencer and control for supporting different processors and applications.

The five step-down converter rails are consisting of five high frequency switch mode converters with integrated FETs. They are capable of synchronizing to an external clock input and supports switching frequency between 1.7 MHz and 2.7 MHz. The SMPS1 and SMPS2 can combine in dual phase configuration to supply up to 7 A. In addition, SMPS1, SMPS2, and SMPS3 support dynamic voltage scaling by a dedicated I²C interface for optimum power savings.

The five LDOs support 0.9 V to 3.3 V output with 50-mV step. The LDOs can be supplied from either a system supply or a pre-regulated 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 TPS65916 device includes a 32-kHz RC oscillator to sequence all resources during power up and power down. An internal LDOVRTC generates the supply for the entire digital circuitry of the device as soon as the VSYS supply is available through the VCCA input.

Configurable GPIOs with multiplexed feature are available on the TPS65916 device. The GPIOs can be configured and used as enable signals for external resources, which can be included into the power-up and power-down sequence. The general-purpose (GP) sigma-delta analog-to-digital converter (ADC) with two external input channels included in this device can be used as thermal or voltage and current monitors.