Datasheet

4
LTC1682/LTC1682-3.3/LTC1682-5
Oscillator Frequency vs
Temperature
Operating Current vs V
IN
(No Load)
V
OUT
Transient Response
V
OUT
200µV/DIV
100µs/DIV 1682 G04
C
CPO
= C
OUT
= 4.7µFV
OUT
= 5V
I
OUT
= 10mA T
A
= 25°C
V
IN
= 3V C
FILT
= 1nF
LTC1682-5 Output Noise
(BW = 10Hz to 2.5MHz)
Shutdown to Enable Timing
Min and Max V
CPO
vs V
IN
CPO Output Resistance vs V
IN
Enable to Shutdown Timing
TYPICAL PERFOR A CE CHARACTERISTICS
UW
V
IN
(V)
1.5
R
CPO
(Ω)
35
30
25
20
15
10
5
2.0
2.5 3.0 3.5
1682 G01
4.0 4.5
T
A
= 25°C
C1 = 0.22µF
I
OUT
= 10mA
V
IN
(V)
1.5
V
CPO
(V)
9
8
7
6
5
4
3
2.0
2.5 3.0 3.5
1682 G02
4.0 4.5
V
CPO
= 2(V
IN
)
(A)
(A) THE MAXIMUM GENERATED NO LOAD
CPO VOLTAGE
(B) THE MINIMUM ALLOWABLE CPO VOLTAGE,
AT FULL LOAD, TO ENSURE THAT THE LDO
IS NOT DISABLED
(B)
V
CPO
= 1.45(V
IN
)
T
A
= 25°C
TIME (µs)
050
∆V
OUT
(mV)I
OUT
(mA)
100 200150
250
300
1682 G02
10
5
0
–5
–10
15
10
5
0
T
A
= 25°C
V
IN
= 3V
V
OUT
= 4V
C
OUT
= 10µF
200µs/DIV
SHDN (V)V
OUT
(V)
2
0
4
3
2
1
0
1682 G05
T
A
= 25°C
V
IN
= 3V
V
OUT
= 4V
I
OUT
= 10mA
C
CPO
= C
OUT
= 10µF
1ms/DIV
SHDN (V)V
OUT
(V)
2
0
4
3
2
1
0
1682 G06
NO LOAD
T
A
= 25°C
V
IN
= 3V
V
OUT
= 4V
C
OUT
= 10µF
TEMPERATURE (°C)
–50
565
560
555
550
545
540
535
530
25 75
1682 G07
–25 0
50 100 125
OSCILLATION FREQUENCY (kHz)
V
IN
= 3V
V
IN
(V)
OPERATING CURRENT (µA)
220
200
180
160
140
120
100
80
60
1682 G08
1.5
2.0
2.5 3.0 3.5 4.0 4.5
T
A
= 25°C
LTC1682-3.3
LTC1682-5
LTC1682