Datasheet

LT1117/LT1117-2.85
LT1117-3.3/LT1117-5
5
1117fd
TYPICAL PERFORMANCE CHARACTERISTICS
LT1117 Ripple Rejection
LT1117 Ripple Rejection
vs Current Temperature Stability
Adjust Pin Current
LT1117-2.85
Load Transient Response
LT1117-5
Load Transient Response
FREQUENCY (Hz)
20
RIPPLE REJECTION (dB)
40
60
80
100
10 1k 10k 100k
1117 G04
0
100
90
70
50
30
10
C
ADJ
= 200µF AT f < 60Hz
C
ADJ
= 25µF AT f > 60Hz
I
OUT
= 0.5A
(V
IN
– V
OUT)
≥ V
DROPOUT
V
RIPPLE
≤ 3V
P-P
V
RIPPLE
≤
0.5V
P-P
(V
IN
– V
OUT)
≥ 3V
OUTPUT CURRENT (A)
0
0
RIPPLE REJECTION (dB)
20
30
50
80
100
0.2 0.4 0.6 0.8
1117 G05
10
40
60
70
90
V
OUT
= 5V
C
ADJ
= 25µF
C
OUT
= 25µF
V
RIPPLE
≤ 3V
P-P
f
RIPPLE
= 120Hz
f
RIPPLE
= 20kHz
V
RIPPLE
≤ 0.5V
P-P
TEMPERATURE (°C)
–50
–2.0
OUTPUT VOLTAGE CHANGE (%)
–1.0
0
2.0
0 50 100 150
1117 G06
1.0
–25 25 75 125
TEMPERATURE (°C)
–50
0
ADJUST PIN CURRENT (µA)
20
50
100
0 50 100 150
1117 G07
80
–25 25 75 125
10
30
40
60
70
90
TIME (µs)
0
–0.5
LOAD CURRENT
(A)
0.3
20 50 70 100
1117 G08
0.1
10 30 60 80
0
0.5
–0.2
0
0.2
–0.1
40 90
OUTPUT VOLTAGE
DEVIATION (V)
C
IN
= 10µF
C
OUT
= 10µF TANTALUM
V
IN
= 4.25V
PRELOAD = 0.1A
TIME (µs)
0
–0.5
LOAD CURRENT
(A)
0.3
20 50 70 100
1117 G09
0.1
10 30 60 80
0
0.5
–0.2
0
0.2
–0.1
40 90
OUTPUT VOLTAGE
DEVIATION (V)
C
IN
= 10µF
C
OUT
= 10µF TANTALUM
V
IN
= 6.5V
PRELOAD = 0.1A
LT1117-2.85
Line Transient Response
LT1117-5
Line Transient Response
TIME (µs)
0
3.25
INPUT VOLTAGE
(V)
60
40 100 140 200
1117 G10
20
20 60 120 160
4.25
5.25
–40
0
40
–20
80 180
OUTPUT VOLTAGE
DEVIATION (mV)
C
IN
= 1µF
C
OUT
= 10µF TANTALUM
I
OUT
= 0.1A
TIME (µs)
0
5.50
INPUT VOLTAGE
(V)
60
40 100 140 200
1117 G11
20
20 60 120 160
6.50
7.50
–40
0
40
–20
80 180
OUTPUT VOLTAGE
DEVIATION (mV)
C
IN
= 1µF
C
OUT
= 10µF TANTALUM
I
OUT
= 0.1A