ZHCSQT5 July 2022 TPS7A57
PRODUCTION DATA
This device allows the internal charge pump to be disabled for systems that cannot tolerate any switching noise.
When VIN is less than 1.1 V, the BIAS rail is required because this rail sources the current needed by the internal circuitry. The charge pump can be either enabled or disabled. Consider adequate operating headroom requirements from OUT to BIAS if the charge pump is disabled. See the Section 8.1.2 section for more details.
When VIN is greater than or equal to 1.1 V, the CP_EN pin connection determines how the internal circuitry is powered. If CP_EN is connected to GND (CP disabled), the internal circuitry is powered from the BIAS rail; see the Section 8.1.2 section for more details. If CP_EN is connected to the supply (CP enabled), any current required to power the internal circuitry comes from the IN pin. As such, the BIAS pin can be left open.