Datasheet
DocID023280 Rev 3 9/28
ST1S15 Typical performance characteristics
Figure 7. Supply current vs. input voltage in
PWM mode
Figure 8. Output voltage vs. output current
V
IN
= 2.3 V to 5.5 V, Mode = V
IN
, V
OUT
= 1.82 V, V
EN
= V
IN
V
EN
= V
IN
, Mode = V
IN
, V
OUT
= 1.82 V
1
10
100
2 2.5 3 3.5 4 4.5 5 5.5 6
ISupply [mA]
Input Voltage [V]
T= 85 °C
T= 25 °C
T= 0°C
T= -40 °C
1.79
1.8
1.81
1.82
1.83
1.84
1.85
0 50 100 150 200 250 300 350 400 450 500 550
Output Voltage [V]
Output Current [mA ]
Vin = 2.5 V
Vin = 3.6 V
Vin = 4.5 V
Figure 9. Frequency vs. input voltage Figure 10. Output voltage vs. output current
V
IN
= 2.3 V to 5.5 V, I
OUT
= 10 mA, Mode = V
IN,
V
EN
= V
IN
V
IN
= 3.6 V, I
OUT
= 0 to 500 mA, Mode = GND, V
EN
= V
IN
Figure 11. Mode transition vs. input voltage Figure 12. Mode transition PFM to PWM
V
IN
= Enable, V
OUT
= 1.82 V, Mode = GND
V
IN
= 3.6 V, V
OUT
= 1.82 V, Mode = 0 to 3.6 V, Load = 180 Ω
4.5
5
5.5
6
6.5
7
7.5
22.5 33.5 44.5 55.5 6
Frequency [MHz]
Input Voltage [V]
T= 85 °C
T= 25 °C
T= 0°C
T= - 40°C
1.75
1.77
1.79
1.81
1.83
1.85
1.87
1.89
0 50 100 150 200 250 300 350 400 450 500 550
Output Voltage [V]
Output Current [ mA ]
T= 85 °C
T= 25 °C
T= 0°C
T= - 40°C
0
50
100
150
200
250
2 2.5 3 3.5 4 4.5 5 5.5 6
Output Current [ mA ]
Input Voltage [V]
PFM to PWM
PWM to PFM
V
OUT
V
IN
I
L
Mode