Datasheet

9
LT1764 Series
1764fb
LT1764-3.3 10Hz to 100kHz
Output Noise
LT1764-3.3 Transient Response
TEMPERATURE (°C)
–50
LOAD REGULATION (mV)
25
1764 G34
–25 0 50
10
5
0
–5
–10
–15
–20
–25
–30
75 100 125
LT1764
LT1764-3.3
LT1764-2.5
LT1764-1.8
∆I
L
= 1mA TO 3A
V
IN
= 2.7V (LT1764)
V
IN
= V
OUT(NOM)
+ 1V
(LT1764-1.8/-2.5/-3.3)
FREQUENCY (Hz)
10
0.01
OUTPUT NOISE SPECTRAL DENSITY (µV/√Hz)
0.1
1
100 1k 10k 100k
1764 G35
LT1764-3.3 LT1764-2.5
LT1764-1.8
LT1764
C
OUT
= 10µF
I
LOAD
= 3A
LOAD CURRENT (A)
10
OUTPUT NOISE (µV
RMS
)
15
25
35
40
0.0001 0.01 0.1 10
1764 G36
5
0.001
1
30
20
0
LT1764-3.3
LT1764-2.5
LT1764-1.8
LT1764
C
OUT
= 10µF
V
OUT
100µV/
DIV
C
OUT
= 10µF 1ms/DIV 1764 G37
I
L
= 3A
TIME (µs)
0
OUTPUT VOLTAGE
DEVIATION (V)
LOAD CURRENT (A)
–0.1
0.1
–0.2
0
0.2
16
1764 G38
1.00
0.50
0.75
0.25
0
462
8
12 14 18
10
20
V
IN
= 4.3V
C
IN
= 3.3µF TANTALUM
C
OUT
= 10µF TANTALUM
LT1764-3.3 Transient Response
TIME (µs)
0
OUTPUT VOLTAGE
DEVIATION (V)
LOAD CURRENT (A)
–0.1
0.1
–0.2
0
0.2
16
1764 G39
2
3
1
0
462
8
12 14 18
10
20
V
IN
= 4.3V
C
IN
= 33µF
C
OUT
= 100µF TANTALUM
+ 10 × 1µF CERAMIC
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Load Regulation
Output Noise Spectral Density
RMS Output Noise vs Load Current
(10Hz to 100kHz)