BL8091
COMPONENT SELECTRION
When setting up the BL8091 for different output voltage, please use following recommended component value for the
best performance.
VOUT (V)
8
COUT (F)
22x2
L (H)
22
5
22x2
15
3.3
2.5
1.8
1.2
22x2
22x2
22x2
22x2
10
6.8
4.7
3.3
THERMAL CONSIDERATION
BL8091 is high efficiency Buck converter, which means it consumes very few power when converting the high voltage to
low voltage. However, when output power is very large, like 5V/2A, the output power is as high as 10W, a heat
dissipation path is strongly recommended to be routed on PCB. BL8091 has two different SOP8 package. For the normal
SOP8, the heat is conducted out via Pin 4 (GND), so the heat dissipation route on PCB should be connected to the Pin 4
of the chip. If ESOP8 is selected, the heat dissipation copper area should be exposed and connected to the exposed pad
underneath the chip body.
When output power is larger than 10W, the ESOP8 package is recommended.
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