AST1S31HF Datasheet, PDF (7/33 Pages) STMicroelectronics – Internal soft-start and enable

AST1S31HF
4
Electrical characteristics
Electrical characteristics
T_J = -40 °C to 125 °C, V_IN = 4 V, unless otherwise specified.
Table 4. Electrical characteristics
Symbol
Parameter
Test condition
Values
Unit
Min. Typ. Max.
V_IN
V_INON
V_INOFF
Operating input voltage range
Turn-on V_CC threshold
Turn-off V_CC threshold
R_DSON-P High-side switch on-resistance
R_DSON-N Low-side switch on- resistance
I_LIM Maximum limiting current
Oscillator
I_SW = 300 mA, T_J = 25 °C
I_SW = 300 mA
I_SW = 300 mA, T_J = 25 °C
I_SW = 300 mA
2.8
2.3
1.85
3.6
F_SW Switching frequency
1.75
Dynamic characteristics
V_FB Feedback voltage
I_LOAD = 0 A
0.79
DC characteristics
I_Q
I_QST-BY
Enable
Quiescent current
Duty cycle = 0, no load V_FB = 1.2 V
Total standby quiescent current OFF
Device ON level
1.5
V_EN EN threshold voltage
Device OFF level
I_EN
EN current
Power Good
PG threshold
92
PG PG output voltage low
Isink = 6 mA open drain
PG rise delay
Soft-start
T_SS Soft-start duration
Protection
Thermal shutdown
(1)
T_{SHDN Hystereris}
(1)
2.45
2.0
70
55
2.3
0.8
630
94
170
400
150
20
4
2.6
V
2.15
110
m
140
90
m
110
6.0
A
2.5 MHz
0.81 V
1200 A
1
A
V
0.5
0.1 A
96 %V_FB
400 mV
s
s
°C
1. Guaranteed by design.
DocID026968 Rev 2
7/33
33