Datasheet

DocID11039 Rev 8 7/22
LDS3985xx Electrical characteristics
I
O(PK)
Peak output current V
O
≥ V
O(NOM)
- 5% 300 550 mA
V
INH
Inhibit input logic low
V
I
= 2.5 V to 6 V, T
J
= - 40 to 125 °C
0.4
V
Inhibit input logic high 1.4
I
INH
Inhibit input current V
INH
= 0.4 V, V
I
= 6 V ±1 nA
eN Output noise voltage B
W
= 10 Hz to 100 kHz, C
O
= 2.2 µF 30 µV
RMS
t
ON
Turn-on time
(4)
C
BYP
= 33 nF 240 µs
T
SHDN
Thermal shutdown
(5)
160 °C
C
O
Output capacitor
Capacitance 2.2 22 µF
ESR 5 5000 mΩ
1. For V
O(NOM)
< 2 V, V
I
= 2.5 V.
2. For V
O(NOM)
= 1.25 V, V
I
= 2.5 V.
3. Dropout voltage is the input-to-output voltage difference at which the output voltage is 100 mV below its nominal value. This
specification does not apply to input voltages below 2.5 V.
4. Turn-on time is time measured between the enable input just exceeding V
INH
high value and the output voltage just
reaching 95% of its nominal value.
5. Typical thermal protection hysteresis is 20 °C.
Table 4. LDS3985xx electrical characteristics (continued)
Symbol Parameter Test conditions Min. Typ. Max. Unit
Table 5. LDS3985xx (automotive grade) electrical characteristics
Symbol Parameter Test conditions Min. Typ. Max. Unit
V
I
Operating input voltage 2.5 6 V
V
O
Output voltage < 2.5 V
I
O
= 1 mA -50 50
mV
T
J
= - 40 to 85 °C -75 75
V
O
Output voltage ≥ 2.5 V
I
O
= 1 mA -2 2 %
V
O(NO
M)
T
J
= - 40 to 85 °C -3 3
ΔV
O
Line regulation
(1)
V
I
= V
O(NOM)
+ 0.5 to 6 V,
T
J
= - 40 to 85 °C
-0.1 0.1
%/V
V
O
= 4.7 to 5 V -0.19 0.19
ΔV
O
Load regulation
I
O
= 1 mA to 300 mA, V
O
≤ 2.5 V
T
J
= - 40 to 85 °C
0.005 0.01 %/mA
ΔV
O
Load regulation
I
O
= 1 mA to 300 mA, V
O
≥ 2.5 V
T
J
= - 40 to 85 °C
0.0008 0.004 %/mA
ΔV
O
Output AC line regulation
(2)
V
I
= V
O(NOM)
+ 1 V, I
O
= 300 mA,
t
R
= t
F
= 30 µs
5mV
PP