STBB2 Datasheet, PDF (10/25 Pages) STMicroelectronics – 800 mA 2.5 MHz, high efficiency dual mode buck-boost DC-DC converter

Typical performance characteristics
6
Typical performance characteristics
STBB2
Maximum output
current
vs. input voltage
Table 7. Table of graphs
Efficiency
vs. output current (power save enabled, V_IN = 2.5 V, 3.6 V, 4.5 V/V_OUT = 3.4 V)
vs. output current (power save disabled, V_OUT = 2.5 V, 3.6 V, 4.5 V/
V_OUT = 3.4 V)
vs. output current (power save enabled, V_IN = 2.5 V, 3.6 V, 4.5 V/V_OUT = 2.9 V)
vs. output current (power save disabled, V_OUT = 2.5 V, 3.6 V, 4.5 V/
V_OUT = 2.9 V)
vs. input voltage power save enabled, V_OUT = 3.4 V, I_OUT = (10; 50; 150; 500;
800 mA)
vs. input voltage power save disabled, V_OUT = 3.4 V, I_OUT = (10; 500; 1000;
2000 mA)
vs. output current (PWM/Auto mode)
Waveforms
Load transient response V_IN < V_OUT
Load transient response V_IN > V_OUT
Line transient response (V_OUT = 3.3 V, I_OUT = 1500 mA)
Startup after enable (V_OUT = 3.3 V, V_IN = 2.4 V, I_OUT = 300 mA)
Startup after enable (V_OUT = 3.3 V, V_IN = 4.2 V, I_OUT = 300 mA)
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
Figure 10
Figure 12
Figure 13
Figure 14
Figure 15
Figure 16
Figure 17
Figure 18
Figure 6. Maximum output current vs. input voltage
2200
AM10444v1
2000
1800
1600
1400
1200
1000
800
600
400
VOUT = 2.9 V
200
VOUT = 3.4 V
0
2
2.5
3
3.5
4
4.5
5
5.5
V_IN [V]
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DocID022745 Rev 9