STBB1-AXX Datasheet, PDF (4/24 Pages) STMicroelectronics – Buck-boost DC-DC converter

List of figures
List of figures
STBB1-AXX
Figure 1: STBB1-AXX block diagram .........................................................................................................5
Figure 2: Pin connection (top view) ............................................................................................................7
Figure 3: Application circuit (adjustable output version) .............................................................................8
Figure 4: Efficiency vs. IOUT in auto mode ..............................................................................................13
Figure 5: Efficiency vs. IOUT in PWM mode ............................................................................................13
Figure 6: Efficiency vs. VIN, IOUT = 500 mA ...........................................................................................13
Figure 7: PS to PWM transition ................................................................................................................13
Figure 8: Max. IOUT vs. VIN.....................................................................................................................14
Figure 9: Boost region operation ..............................................................................................................14
Figure 10: Boost region operation IO=200 mA .........................................................................................14
Figure 11: Buck-boost region operation....................................................................................................14
Figure 12: Buck-boost region operation @ IO=500 mA ...........................................................................14
Figure 13: Buck-boost region operation @ IO=50 mA .............................................................................14
Figure 14: Buck region operation (skipping mode) ...................................................................................15
Figure 15: Buck region operation (PWM mode) .......................................................................................15
Figure 16: Component placement ............................................................................................................18
Figure 17: Top layer routing......................................................................................................................18
Figure 18: Bottom layer routing ................................................................................................................19
Figure 19: DFN10 (3X3 mm) drawings .....................................................................................................20
Figure 20: DFN10 (3X3 mm) recommended footprint ..............................................................................22
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