Datasheet

LTC3025-1/LTC3025-2/
LTC3025-3/LTC3025-4
6
30251234ff
Typical perForMance characTerisTics
Transient Response
250mA
10mA
I
OUT
V
OUT
AC
10mV/DIV
V
IN
= 1.5V
V
OUT
= 1.2V
V
BIAS
= 3.6V
C
OUT
= 1µF
100µs/DIV
30251234 G13
V
IN
to V
OUT
Dropout Voltage
vs V
IN
(25°C) LTC3025-1
(T
A
= 25°C unless otherwise noted)
V
IN
to V
OUT
Dropout Voltage
vs V
IN
(90°C) LTC3025-1
V
IN
(V)
1
0
DROPOUT (V)
0.025
0.075
0.100
0.125
0.300
0.175
2
3
3.5
30251234 G14
0.050
0.200
0.225
0.250
0.275
0.150
1.5
2.5
4
4.5
V
ADJ
= 0.385
I
OUT
= 500mA
T
A
= 25°C
BIAS = 2.7V
BIAS = 3V
BIAS = 3.3V
BIAS = 3.8V
BIAS = 5V
V
IN
(V)
1
0
DROPOUT (V)
0.025
0.075
0.100
0.125
0.300
0.175
2
3
3.5
30251234 G15
0.050
0.200
0.225
0.250
0.275
0.150
1.5
2.5
4
4.5
V
ADJ
= 0.385
I
OUT
= 500mA
T
A
= 90°C
BIAS = 2.7V
BIAS = 3.8V
BIAS = 5V
BIAS = 3V
BIAS = 3.3V
V
IN
Ripple Rejection
vs Frequency
BIAS Ripple Rejection
vs Frequency
3MHz V
IN
Supply Rejection
FREQUENCY (Hz)
100
50
60
70
1M
30251234 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
30251234 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)
1.2
0
REJECTION (dB)
5
15
20
25
50
35
1.6
2.0
2.2
30251234 G12
10
40
45
30
1.4
1.8
2.4
2.6
V
BIAS
= 3.6V
V
OUT
= 1.2V
I
OUT
= 100mA
I
OUT
= 300mA
C
OUT
= 1µF
C
OUT
= 10µF