STBB1PUR Datasheet, PDF (11/21 Pages) STMicroelectronics – 1 A, high efficiency single inductor

STBB1XX
Typical performance characteristics
7
Typical performance characteristics
Figure 5.
100
90
80
70
60
50
1
L = 2.2 µH, V_O = 3.3 V, all measurements done with circuit shown in Figure 3 and external
components listed in Table 5.
Efficiency vs. I_OUT in auto mode Figure 6. Efficiency vs. I_OUT in PWM mode
100
90
80
70
60
50
40
V_IN = 3.6 V
V_IN = 2.2 V
V_IN = 5.0 V
10
100
Output Current [mA]
1000
30
20
10
0
1
V_IN = 3.6 V
V_IN = 5.0 V
V_IN = 2.2 V
10
100
Output Current [mA]
1000
Figure 7. Efficiency vs. V_IN, I_OUT = 500 mA
100
90
80
70
V_O = 2.5 V
60
V_O = 5.0 V
V_O = 3.3 V
50
2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50
Input Voltage [V]
Figure 8. PS to PWM transition
800
700
600
500
400
300
200
100
2.1 2.4 2.7 3 3.3 3.6 3.9 4.2 4.5 4.8 5.1 5.4
VIN [V]
Figure 9.
1200
1100
1000
900
800
700
600
500
400
300
200
2
Max I_OUT vs. V_IN
Figure 10. Boost region operation
SW1
3 V/div
SW2
3 V/div
V_O = 2.5 V
V_O = 3.3 V
V_O = 5.0 V
I_L
0.2 A/div
V_O
70 mV/div
AC Coupled
2.5
3
3.5
4
4.5
5
5.5
TIMEBASE: 2 µs/div
Input Voltage
V_IN = 2.5 V V_O = 3.3 V I_O = 50 mA, pulse skipping
Doc ID 15474 Rev 5
11/21