Datasheet

LTC114 4
3
1144fa
For more information www.linear.com/LTC1144
elecTrical characTerisTics
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: Connecting any input terminal to voltages greater than V
+
or less
than ground may cause destructive latch-up. It is recommended that no
inputs from sources operating from external supplies be applied prior to
power-up of the LTC1144.
Note 3: f
OSC
is tested with C
OSC
= 100pF to minimize the effects of test
fixture capacitance loading. The 0pF frequency is correlated to this 100pF
test point, and is intended to simulate the capacitance at pin 7 when the
device is plugged into a test socket and no external capacitor is used.
SYMBOL PARAMETER CONDITIONS
LTC1144C LTC1144I
UNITSMIN TYP MAX MIN TYP MAX
Supply Voltage Range R
L
= 10k
l
2 18 2 18 V
I
S
Supply Current R
L
= ∞, Pins 1, 6 No Connection,
f
OSC
= 10kHz
l
1.1
1.3
1.1
1.6
mA
mA
SHDN = 0V, R
L
= ∞, Pins 1, 7
No Connection
l
0.008 0.03 0.008 0.035 mA
V
+
= 5V, R
L
= ∞, Pins 1, 6
No Connection, f
OSC
= 4kHz
l
0.10
0.13
0.10
0.15
mA
mA
V
+
= 5V, SHDN = 0V, R
L
= ∞,
Pins 1, 7 No Connection
l
0.002 0.015 0.002 0.018 mA
R
OUT
Output Resistance V
+
= 15V, I
L
= 20mA at 10kHz
l
56 100
120
56 100
140
Ω
Ω
V
+
= 5V, I
L
= 3mA at 4kHz
l
90 250 90 300 Ω
f
OSC
Oscillator Frequency V
+
= 15V (Note 3)
V
+
= 5V
10
4
10
4
kHz
kHz
Power Efficiency R
L
= 2k at 10kHz
l
90 93 90 93 %
Voltage Conversion Efficiency R
L
= ∞
l
97.0 99.9 97.0 99.9 %
Oscillator Sink or Source Current V
+
= 5V (V
OSC
= 0V to 5V)
V
+
= 15V (V
OSC
= 0V to 15V)
0.5
4
0.5
4
µA
µA
The l denotes the specifications which apply over the full operating
temperature range,V
+
= 15V, C
OSC
= 0pF, Test Circuit Figure 1, otherwise specifications are at T
A
= 25°C.
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