4
FN9235.1
March 11, 2008
LDO Soft-start Ramp Rate t
SSR
Slope of linear portion of LDO output voltage ramp during start-up 30 60 µs/V
EN PIN CHARACTERISTICS
Input Low Voltage V
IL
-0.3 0.4 V
Input High Voltage V
IH
1.4 V
IN
+ 0.3 V
Input Leakage Current I
IL
, I
IH
0.1 µA
Pin Capacitance C
PIN
Informative 5 pF
NOTES:
6. VOx = 0.98*VOx(NOM); Valid for VOx greater than 1.85V
7. Parts are 100% tested at +25°C. 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; V
IN
= (V
O
+0.5V) to 6.5V with a minimum V
IN
of 2.3V; C
IN
= 1µF; C
O
= 1µF (Continued)
PARAMETER SYMBOL TEST CONDITIONS
MIN
(Note 7 TYP
MAX
(Note 7) UNITS
Typical Performance Curves
FIGURE 1. OUTPUT VOLTAGE vs INPUT VOLTAGE
(3.3V OUTPUT)
FIGURE 2. OUTPUT VOLTAGE CHANGE (%) vs INPUT
VOLTAGE (3.3V OUTPUT)
FIGURE 3. OUTPUT VOLTAGE vs LOAD CURRENT
FIGURE 4. OUTPUT VOLTAGE vs TEMPERATURE
OUTPUT VOLTAGE, VO (%)
INPUT VOLTAGE (V)
-0.6
-0.2
0.2
0.6
-0.8
3.8 4.2 6.25.8
6.63.4 4.6 5.0 5.4
-0.4
0.0
0.4
0.8
V
O
= 3.3V
+85°C
-40°C
+25°C
I
LOAD
= 0mA
OUTPUT VOLTAGE CHANGE (%)
INPUT VOLTAGE (V)
VO = 3.3V
I
O
= 0mA
I
O
= 75mA
I
O
= 150mA
+25°C
0.2
0.1
0.0
-0.1
-0.2
-0.3
-0.4
3.3 3.8 4.3 4.8 5.3 5.8 6.3
LOAD CURRENT - I
O
(mA)
OUTPUT VOLTAGE CHANGE (%)
+85°C
-40°C
+25°C
1.0
0.8
0.6
0.4
0.2
0.0
-0.2
-0.4
-0.6
-0.8
-1.0
0 25 50 75 100 125 150 175
V
IN
= 3.8V
V
O
= 3.3V
0.04
0.06
-0.06
-0.10
-25 0 25 85-40
TEMPERATURE (°C)
OUTPUT VOLTAGE (%)
-0.02
0.00
0.02
0.08
0.10
-0.04
-0.08
55
V
IN
= 3.8V
V
O
= 3.3V
I
O
= 0mA
I
O
= 75mA
I
O
= 150mA
ISL9008
