JAJSLW7B December 2020 – September 2023 TPS6593-Q1
PRODUCTION DATA
The TPS6593-Q1 includes five synchronous buck converters, of which four can be combined in multi-phase configuration. All of the buck converters support the following features:
When the outputs of these buck converters are combined in multi-phase configuration, it also supports the following features:
There are two modes of operation for the buck converter, depending on the required output current: pulse-width modulation (PWM) and pulse-frequency modulation (PFM). The converter operates in PWM mode at high load currents of approximately 600 mA or higher. Lighter output current loads cause the converter to automatically switch into PFM mode for reduced current consumption. The device avoids pulse skipping and allows easy filtering of the switch noise by external filter components when forced-PWM mode is selected (BUCKn_FPWM = 1). The forced-PWM mode is the recommended mode of operation for the buck converter to achieve better ripple and transient performance. The drawback of this forced-PWM mode is the higher quiescent current at low output current levels.
When operating in PWM mode the phases of a multi-phase regulator are automatically added or shed based on the load current level. The forced multi-phase mode can be enabled for lower ripple at the output.
Figure 8-2 shows a block diagram of a single core.
Figure 8-3 shows the interleaving switching action of the multi-phase converters.