SLVSCO4D July 2015 – February 2019 TPS65917-Q1
The TPS65917-Q1 device is an integrated power management integrated circuits (PMIC), available in a 48-pin, 0.5-mm pitch, 7-mm × 7-mm QFN package. It is designed specifically for automotive applications. It has five configurable step-down converter rails, with two of these SMPSs capable of combining power rails and supply up to 7 A of output current in multi-phase mode. These step-down converters can be synchronized to an external clock between 1.7 MHz to 2.7 MHz, or an internal fallback clock at 2.2 MHz. The TPS65917-Q1 device also has five external LDOs which can be supplied from the system supply or a pre-regulated supply. Two of these LDOs can be configured in bypass mode. One of the five LDOs also provides low noise output.
The TPS65917-Q1 device also come with a 12-bit GPADC with two external channels, seven configurable GPIOs, two I2C interface channels or one SPI interface channel, a PLL for external clock sync and phase delay capability, and a programmable power sequencer and control for supporting different processors and applications.
As TPS65917-Q1 device is a highly integrated PMIC device, it is very important that customers should take necessary actions to ensure the PMIC is operating under the recommended operating conditions to ensure desired performance from the device. Additional cooling strategies may be necessary to maintain the junction temperature below maximum limit allowed for the device. To minimize the interferences when turning on a power rail while the device is in operation, optimal PCB layout and grounding strategy are essential and are recommended in Section 6.3. In addition, customer may take steps such as turning on additional rails only when the systems is operating in light load condition.
Details on how to use this device as a power management device for a application processor are described throughout this device specification. The following sections provides the typical application use case with the recommended external components and layout guidelines. A design checklist for the TPS65917-Q1 device is also available on which provides application design guidance and cross checks.