STBB2 Datasheet, PDF (13/25 Pages) STMicroelectronics – 800 mA 2.5 MHz, high efficiency dual mode buck-boost DC-DC converter

STBB2
Typical performance characteristics
Figure 13. Efficiency vs. output current (PWM / auto mode)
100
90
80
70
60
50
40
30
20
10
0
1
AM10442v1
V_OUT = 3.4 V
Vin=2.5V PWM mode
Vin=2.5V Auto mode
10
100
I_OUT [mA]
1000
Figure 14. V_IN = 2.4 V, V_OUT = 3.4 V, I_OUT = from 80 mA to 630 mA
V_OUT = 3.4 V
Input voltage 200 mV/div,
DC Offset 2.46
Output Voltage
200 mV/div, AC
Time base 1 msec
Output Current
500 mA/div
Figure 15. V_IN = 4.2 V, V_OUT = 3.4 V, I_OUT = from 80 mA to 1100 mA
V_OUT = 3.4 V
Input voltage
200 mV/div, DC offset 4.2 V
Output Voltage
200 mV/div, AC
Time base 1 msec
Output Current
500 mA/div
DocID022745 Rev 9
13/25