Datasheet

LTC1046
4
1046fb
AMBIENT TEMPERATURE (°C)
–55
26
OSCILLATOR FREQUENCY, f
OSC
(kHz)
30
32
34
36
38
40
25 50 100 125
1046 G11
28
–25 0 75
V
+
= 5V
C
OSC
= 0pF
AMBIENT TEMPERATURE (°C)
0
1
OSCILLATOR FREQUENCY, f
OSC
(kHz)
10
100
1457
1046 G10
23 6
T
A
= 25°C
C
OSC
= 0pF
CCHARA TERIST
ICS
UW
AT
Y
P
I
CA
LPER
F
O
R
C
E
TEST CIRCUIT
Figure 1
Oscillator Frequency as a Oscillator Frequency vs
Function of Supply Voltage Temperature
(Using Test Circuit in Figure 1)
C
OSC
EXTERNAL
OSCILLATOR
C2
10µF
V
OUT
V
+
(5V)
R
L
I
S
I
L
1046 F01
1
2
3
4
8
7
6
5
V
+
OSC
LV
V
OUT
BOOST
CAP
+
GND
CAP
–
LTC1046
C1
10µF
+
+
EXTERNAL CAPACITOR (PIN 7 TO GND), C
OSC
(pF)
1
0.1
OSCILLATOR FREQUENCY, f
OSC
(kHz)
1
10
100
10 100 10000
1046 G09
1000
V
+
= 5V
T
A
= 25°C
PIN 1 = OPEN
PIN 1 = V
+
LOAD CURRENT, I
L
(mA)
0
–2.5
OUTPUT VOLTAGE (V)
–2.0
–1.5
–1.0
–0.5
0.0
0.5
2
4
6
8
1046 G07
10 12 14 16 18 20
1.0
1.5
2.0
2.5
SLOPE = 52Ω
T
A
= 25°C
V
+
= 2V
f
OSC
= 8kHz
C1 = C2 = 10µF
LOAD CURRENT, I
L
(mA)
0
–5
OUTPUT VOLTAGE (V)
–4
–3
–2
–1
0
1
10 20 30 40
1046 G08
50 60 70 80 90 100
2
3
4
5
SLOPE = 27Ω
T
A
= 25°C
V
+
= 5V
f
OSC
= 30kHz
C1 = C2 = 10µF
Output Voltage vs Load Current Output Voltage vs Load Current Oscillator Frequency as a
for V
+
= 2V for V
+
= 5V Function of C
OSC