Datasheet

LTC3025
4
3025fd
FREQUENCY (Hz)
100
50
60
70
1M
3025 G10
40
30
1k 10k 100k 10M
20
10
0
REJECTION (dB)
V
BIAS
= 3.6V
V
IN
= 1.5V
V
OUT
= 1.2V
I
OUT
= 100mA
C
OUT
= 10µF
C
OUT
= 1µF
FREQUENCY (Hz)
100
50
60
70
1M
3025 G11
40
30
1k 10k 100k 10M
20
10
0
REJECTION (dB)
V
BIAS
= 3.6V
V
IN
= 1.5V
V
OUT
= 1.2V
I
OUT
= 100mA
C
OUT
= 10µF
C
OUT
= 1µF
V
IN
(V)
0
CURRENT LIMIT (mA)
600
800
1000
3
5
3025 G08
400
200
0
12 4
1200
1400
1600
6
V
BIAS
= 3.6V
V
OUT
= 0V
TYPICAL PERFORMANCE CHARACTERISTICS
V
IN
No Load Operating Current V
IN
Shutdown Current Adjust Voltage vs Temperature
SHDN Threshold vs Temperature Current Limit vs V
IN
Voltage
Burst Mode DC/DC Buck Ripple
Rejection
V
IN
Ripple Rejection
vs Frequency
BIAS Ripple Rejection
vs Frequency
V
IN
(V)
0.5
10
125°C
85°C
25°C
–40°C
12
14
4.5
3025 G04
8
6
1.5 2.5 3.5 5.5
4
2
0
I
IN
(µA)
V
BIAS
= 5V
V
OUT
= 0.8V
V
IN
(V)
0.5
5
25°C
–40°C
6
7
4.5
3025 G05
4
3
1.5 2.5 3.5 5.5
2
1
0
I
IN
(µA)
85°C
V
BIAS
= 5V
TEMPERATURE (°C)
–50
395
ADJUST VOLTAGE (mV)
396
398
399
400
405
402
0
50
75
3025 G06
397
403
404
401
–25
25
100
125
V
BIAS
= 3.6V
V
IN
= 1.5V
I
OUT
= 10µA
TEMPERATURE (°C)
–50
0
SHDN THRESHOLD (mV)
100
300
400
500
1000
700
0
50
75
3025 G07
200
800
900
600
–25
25
100
125
V
BIAS
= 2.5V
V
BIAS
= 5V
V
IN
AC
100mV/DIV
V
OUT
AC
10mV/DIV
V
IN
= 1.8V
V
OUT
= 1.5V
C
OUT
= 1µF
I
OUT
= 50mA
10µs/DIV
3025 G09