JAJSHY1E September 2019 – March 2022 TPS25840-Q1 , TPS25842-Q1
PRODUCTION DATA
The TPS2584x-Q1 is in Active Mode when VEN is above the precision enable threshold, VIN and VCC are above their respective UVLO levels. The simplest way to enable the TPS2584x-Q1 is to connect the EN pin to VIN pin. This connection allows self startup when the input voltage is in the operating range of 3.8 V to 36 V and a UFP detection is made. For details on setting these operating levels, refer to VCC, VCC_UVLO and Enable/UVLO.
In Active Mode, the TPS2584x-Q1 buck regulator operates with Forced Pulse Width Modulation (FPWM), also referred to as Forced Continuous Conduction Mode (FCCM). This operation ensures the buck regulator switching frequency remains constant under all load conditions. FPWM operation provides low output voltage ripple, tight output voltage regulation, and constant switching frequency. Built-in spread-spectrum modulation aids in distributing spectral energy across a narrow band around the switching frequency programmed by the RT/SYNC pin. Under light load conditions the inductor current is allowed to go negative. A negative current limit of IL_NEG is imposed to prevent damage to the regulator's low side FET. During operation the TPS2584x-Q1 synchronized to any valid clock signal on the RT/SYNC input.