ZHCSQT5 数据表 | 德州仪器 TI.com.cn

ZHCSQT5 July 2022 TPS7A57

PRODUCTION DATA

The device regulates to the nominal output voltage when the following conditions are met:

The input voltage is greater than the nominal output voltage plus the dropout voltage (V_OUT(nom) + V_DO)
The bias voltage is greater than the nominal output voltage plus the OUT-to-BIAS dropout voltage (V_OUT(nom) + V_DO(BIAS)) if the charge pump is disabled or if the input voltage is less than 1.1 V
The output current is less than the current limit (I_OUT < I_LIM)
The device junction temperature is less than the thermal shutdown temperature (T_J < T_SD(shutdown))
The voltage on the EN pin has previously exceeded the V_IH(EN) threshold voltage and has not yet decreased to less than the enable falling threshold

Table 7-1 summarizes all valid modes of operation and shows what rail is sourcing the internal biasing current.

Table 7-1 Valid Modes of Operation

V_IN RANGE	V_OUT RANGE	V_BIAS RANGE	CP MODE	RAIL SOURCING BIASING CURRENT
< 1.1 V	≥ 0.5 V, ≤ V_IN – V_DO	3 V to 11 V	On	BIAS
< 1.1 V	≥ 0.5 V, ≤ V_IN – V_DO	Max (V_OUT + 2.1 V, 2.8 V) to 11 V	Off	BIAS
≥ 1.1 V, < 2 V	≥ 0.5 V, ≤ V_IN – V_DO≥ 0.5 V, ≤ V_IN – V_DO	Not present	On	IN
		3 V to 11 V	On	BIAS
		Max (V_OUT + 2.1 V, 2.8 V) to 11 V	Off	BIAS
≥ 2 V	≥ 0.5 V, ≤ V_IN – V_DO	Not required, does not source current even if present	On	IN
≥ 2 V	≥ 0.5 V, ≤ V_IN – V_DO	Max (V_OUT + 2.1 V, 2.8 V) to 11 V	Off	BIAS