Datasheet

DocID023280 Rev 3 7/28
ST1S15 Electrical characteristics
Symbol Parameter Test conditions Min. Typ. Max. Unit
V
OUT_Ri
pple
Peak-to-Peak output voltage
ripple
PWM mode, I
OUT
= 150 mA,
V
IN
= 3.6 V, V
OUT
= 1.82 V
10 mV
PFM mode, I
OUT
= 150 mA,
V
IN
= 3.6 V, V
OUT
= 1.82 V
30 mV
I
LKFB
FB pin leakage current V
FB
= 5.5 V 9 µA
V
IN_TR
Line transient response.
Output voltage variation over
nominal DC level.
t
R
= t
F
= 10 µs
Case 1: V
IN
= 2.5 to 3.1 V
Case 2: V
IN
= 3.9 to 4.5 V
I
OUT
= 50 mA, V
OUT
= 1.82 V
±50 mV
I
OUT
= 250 mA, V
OUT
= 1.82 V
I
OUT_TR
Load transient response
t
R
=t
F
=0.1µs.
Case 1: V
IN
=2.5 V
Case 2: V
IN
=3.6 V
Case 3: V
IN
=4.5 V
I
OUT
= 0 to 150 mA,
V
OUT
= 1.82 V
±50
mV
I
OUT
= 50 to 250 mA,
V
OUT
= 1.82 V
±70
I
OUT
= 150 to 400 mA,
V
OUT
= 1.82 V
±70
Logic Inputs
V
IL
Low-level input voltage (EN,
MODE pins)
0.4 V
V
IH
High-level input voltage (EN,
MODE pins)
1.2 V
I
LK-I
Input leakage current (EN, MODE
pins)
V
EN
= V
MODE
= 5.5 V 0.01 1 µA
Power Switches
R
DSON
P-channel MOSFET on-
resistance
300 400
mΩ
N-channel MOSFET on-
resistance
350 450
I
LPEAK
P-channel peak current limit Over input voltage range 900 1000 1200 mA
I
LKG-P
P-channel leakage current V
IN
= 5.5 V, V
EN
= 0 1 µA
I
LKG-N
N-channel leakage current V
SW
= 5.5 V, V
EN
= 0 1 µA
1. Not tested in production. This value is guaranteed by correlation with R
DSON
, peak current limit and operating input voltage.
2. Not tested in production. This parameter is guaranteed by peak current limit.
Table 7. Electrical characteristics (continued)