Datasheet

Electrical characteristics LDS3985xx
8/22 DocID11039 Rev 8
I
Q
Quiescent current ON
mode: V
INH
= 1.24 V
I
O
= 0 85
µA
I
O
= 0, T
J
= - 40 to 85 °C 150
I
O
= 0 to 300 mA 200
I
O
= 0 to 300 mA, T
J
= - 40 to 85 °C 300
OFF mode: V
INH
= 0.4 V
0.003
T
J
= - 40 to 85 °C 1.5
V
DROP
Dropout voltage
(3)
I
O
= 1 mA 0.4
mV
I
O
= 1 mA, T
J
= -40 to 85 °C 2
I
O
= 150 mA 60
I
O
= 150 mA, T
J
= - 40 to 85 °C 100
I
O
= 300 mA 150
I
O
= 300 mA, T
J
= - 40 to 85 °C 250
I
SC
Short-circuit current R
L
= 0 600 mA
SVR Supply voltage rejection
V
I
= V
O(NOM)
+ 0.25 V ±
V
RIPPLE
= 0.1 V, I
O
= 50 mA
For V
O(NOM)
< 2.5 V,
V
I
= 2.55 V
f = 1 kHz 55
dB
f = 10 kHz 50
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 85 °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 5. LDS3985xx (automotive grade) electrical characteristics (continued)
Symbol Parameter Test conditions Min. Typ. Max. Unit