LNBH29 datasheet(13/31 Pages) STMICROELECTRONICS

13 / 31 page

DocID023065 Rev 3

13/31

LNBH29

Typical application circuits

Table 5. Typical application circuit bill of material

Component

Notes

R1 (RSEL)

SMD resistor. Refer to IMAX current limit selection resistor values (Table 9).

> 25 V electrolytic capacitor, 100 µF or higher is suitable.

> 25 V ceramic capacitor, 10 µF or higher is suitable.

With COMP=0, > 25 V electrolytic capacitor, 100 µF or higher is suitable.

With COMP=1, > 35 V ceramic capacitor, 22 µF (or 2 x 10 µF) or higher is suitable.

From 470 nF to 2.2 µF ceramic capacitor. Higher values allow lower DC-DC noise.

From 100 nF to 220 nF ceramic capacitor. Higher values allow lower DC-DC noise.

C4, C6

220 nF ceramic capacitors.

100 nF or higher is suitable.

STPS130A or similar Schottky diode.

BAT54, BAT43, 1N5818, or any low power Schottky diode with IF(AV) > 0.2 A, VRRM

> 25 V, VF < 0.5 V. To be placed as close as possible to VOUT pin.

1N4001-07, S1A-S1M, or any similar general purpose rectifier.

With COMP=0, use 10 µH inductor with Isat>Ipeak where Ipeak is the boost converter

peak current.

With COMP=1 and C2 = 22 µF, use 6.8 µH inductor with Isat>Ipeak where Ipeak is the

boost converter peak current.

LNBH29 数据表(PDF) 13 Page - STMicroelectronics