ISL9000A
7
FN6391.3
October 15, 2015
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DEVICE START-UP CHARACTERISTICS
Device Enable Time t
EN
Time from assertion of the ENx pin to when the output voltage
reaches 95% of the VOx(NOM)
250 500 µs
LDO Soft-Start Ramp Rate t
SSR
Slope of linear portion of LDO output voltage ramp during start-up 30 60 µs/V
EN1, EN2 PIN CHARACTERISTICS
Input Low Voltage V
IL
-0.3 0.5 V
Input High Voltage V
IH
1.4 VIN
+
0.3
V
Input Leakage Current I
IL
, I
IH
0.1 µA
Pin Capacitance C
PIN
Informative 5 pF
POR1, POR2 PIN CHARACTERISTICS
POR1, POR2 Thresholds V
POR+
As a percentage of nominal output voltage 91 94 97 %
V
POR-
87 90 93 %
POR1
Delay t
P1LH
1.0 2.0 3.0 ms
t
P1HL
25 µs
POR2
Delay t
P2LH
C
POR
= 0.01µF 100 200 300 ms
t
P2HL
25 µs
POR1
, POR2 Pin Output Low
Voltage
V
OL
@ I
OL
= 1.0mA 0.2 V
POR1
, POR2 Pin Internal
Pull-Up Resistance
R
POR
78 100 180 k
NOTES:
6. Limits established by characterization and are not production tested.
7. VOx = 0.98*VOx(NOM); Valid for VOx greater than 1.85V.
8. Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise specified. Temperature limits established by characterization
and are not production tested.
Electrical Specifications Unless otherwise noted, all parameters are guaranteed over the operational supply voltage and temperature
range of the device as follows: T
A
= -40°C to +85°C; VIN = (V
O
+ 0.5V) to 6.5V with a minimum VIN of 2.3V; C
IN
= 1µF; C
O
= 1µF; C
BYP
= 0.01µF;
C
POR
= 0.01µF. Boldface limits apply over the operating temperature range, -40°C to +85°C. (Continued)
PARAMETER SYMBOL TEST CONDITIONS
MIN
(Note 8) TYP
MAX
(Note 8) UNITS
V
POR+
V
POR+
V
POR-
<t
P1HL
t
P2LH
t
P1LH
t
P1HL
t
P2HL
<t
P2HL
VO1
VO2
POR1
POR2
EN2
t
EN
V
POR-
FIGURE 2. TIMING PARAMETER DEFINITION
EN1
