SLVSHC9 January 2024 TPS56A37
PRODUCTION DATA
Figure 6-1 shows the typical start-up sequence of the device after the enable signal triggers the EN turn-on threshold. After the voltage of internal VCC crosses the UVLO rising threshold, the MODE setting is read. After this process, the MODE is latched and does not change until VIN or EN toggles to restart-up this device. Then after a delay, the internal soft-start function begins to ramp up and Vout ramps up smoothly. When Vout is up to the reference voltage, PGOOD turns to high after a delay.
The MODE pin of TPS56A37 is the internal fixed switching frequency setting pin which TI recommends to connect a 1% 52.3k resistor to AGND.