LT1764-1.8 LINER [Linear Technology], LT1764-1.8 Datasheet - Page 8

• Manufacturer Part Number: LT1764-1.8
• Description: 3A, Fast Transient Response, Low Noise,LDO Regulators
• Manufacturer: LINER [Linear Technology]

TYPICAL PERFOR A CE CHARACTERISTICS
LT1764 Series
100 V/DIV
8
–10
–15
–20
–25
–30
80
70
60
50
40
30
20
10
–5
10
0
V
5
0
– 50
OUT
10
Ripple Rejection
Load Regulation
I
V
L
V
V
(LT1764-1.8/-2.5/-3.3)
IN
IN
IN
I
= 1.5A
LT1764-3.3 10Hz to 100kHz
Output Noise
L
C
I
L
– 25
= V
OUT
= 1mA TO 3A
= 2.7V (LT1764)
= V
= 3A
+ 50mV
100
OUT(NOM)
OUT(NOM)
= 10 F
0
TEMPERATURE ( C)
RMS
FREQUENCY (Hz)
LT1764-1.8
+ 1V
1k
+ 1V
RIPPLE
25
1ms/DIV
LT1764-2.5
50
10k
LT1764
LT1764-3.3
C
TANTALUM
OUT
C
TANTALUM +
75
OUT
CERAMIC
10 1 F
W
= 10 F
100k
= 100 F
100
1764 G31
1764 G34
U
1764 G37
125
1M
0.01
0.1
75
70
65
60
55
50
–0.1
–0.2
1.00
0.75
0.50
0.25
0.2
0.1
1
–50 –25
10
0
0
Output Noise Spectral Density
Ripple Rejection
C
I
LT1764-3.3 Transient Response
0
LT1764-3.3
LOAD
OUT
LT1764
2
= 10 F
= 3A
100
4
0
TEMPERATURE ( C)
FREQUENCY (Hz)
6
25
8
TIME ( s)
LT1764-2.5
LT1764-1.8
1k
V
C
C
IN
IN
OUT
I
V
+ 0.5V
AT f = 120Hz
10
L
50
IN
= 1.5A
= 4.3V
= 3.3 F TANTALUM
= V
= 10 F TANTALUM
12 14
P-P
OUT(NOM)
75
10k
RIPPLE
100
16
+ 1V
1764 G32
1764 G35
18
1764 G38
125
100k
20
–0.1
–0.2
3.0
2.5
1.0
2.0
1.5
0.5
40
35
30
25
20
15
10
0.0001
0.2
0.1
5
0
0
–50
0
3
2
1
0
RMS Output Noise vs Load Current
(10Hz to 100kHz)
LT1764 Minimum Input Voltage
C
0
LT1764-3.3 Transient Response
OUT
–25
2
= 10 F
0.001
4
I
L
0
= 500mA
LOAD CURRENT (A)
TEMPERATURE ( C)
6
0.01
V
C
C
IN
IN
OUT
25
8
TIME ( s)
= 4.3V
= 33 F
= 100 F TANTALUM
LT1764-3.3
LT1764-2.5
LT1764-1.8
10
+ 10 1 F CERAMIC
50
LT1764
0.1
12 14
I
75
L
I
I
= 100mA
L
L
= 3A
= 1.5A
1
16
100
1764 G33
1764 G36
18
1764 G39
1764fa
125
10
20