STBB2 Datasheet, PDF (7/25 Pages) STMicroelectronics – 800 mA 2.5 MHz, high efficiency dual mode buck-boost DC-DC converter

STBB2
Pin configuration
Pin name
BP
VSEL
Pin n°
B4
D4
Table 5. Pin description (continued)
Description
Bypass mode selection. When EN is high, connecting this pin to a voltage higher than 1.2
V, the device works in bypass mode. A voltage lower than 0.4 V is required to disable
bypass mode. In bypass mode VIN is shorted to V_OUT through internal switches. Do not
leave this pin floating.
Selection of output voltage for fixed versions (0 V_OUT = 2.9 V / 1 V_OUT = 3.4 V),
(0 V_OUT = 3.0 V / 1 V_OUT = 3.3 V).
This feature is not present in the adjustable version where the VSEL pin must be
connected to VINA. Do not leave this pin floating.
DocID022745 Rev 9
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