LT1965
TYPICAL PERFORMANCE CHARACTERISTICS
Reverse Output Current
Reverse Output Current
Ripple Rejection vs Frequency
6
5
90
80
70
60
50
40
30
20
10
0
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0
T
= 25°C
IN
J
V
V
= 0V
IN
OUT
V
= 0V
= 1.2V
CURRENT FLOWS INTO
OUTPUT PIN
ꢀ
V
= V
OUT
ADJ
4
3
2
1
0
I
= 0.75A
OUT
L
C
= 10μF CERAMIC
V
= V
IN
OUT(NOMINAL)
+ 1V + 50mV
RIPPLE
RMS
0
2
4
6
8
10
10
100
1k
10k
100k
1M
–50 –25
0
25
50
75 100 125
OUTPUT VOLTAGE (V)
FREQUENCY (Hz)
TEMPERATURE (°C)
1965 G16
1965 G18
1965 G17
Ripple Rejection vs Temperature
Minimum Input Voltage
Load Regulation
100
90
2.5
2.0
1.5
1.0
0.5
0
0
–2
V
= 2.3V
IN
L
ΔI = 1mA TO 1.1A
–4
I
I
= 1.1A
L
= 500mA
L
–6
80
–8
I
L
= 100mA
–10
–12
–14
–16
70
60
I
= 0.75A
L
V
= V
+ 1V + 0.5
IN
OUT(NOMINAL) P-P
RIPPLE AT f = 120Hz
–50 –25 25
TEMPERATURE (°C)
0
50
75 100 125
–50 –25
0
25
50
75 100 125
–50 –25
0
25
50
75 100 125
TEMPERATURE (°C)
TEMPERATURE (°C)
1965 G19
1965 G20
1965 G21
RMS Output Noise vs Load
Current (10Hz to 100kHz)
1.8V 10Hz to 100kHz
Output Noise
Output Noise Spectral Density
1.00
0.10
0.01
80
70
60
50
40
30
20
10
0
C
I
= 10μF
C
I
= 10μF
OUT
L
C
I
= 10μF
OUT
L
OUT
L
= 1.1A
= 1.1A
= 1.1A
V
V
V
= 3.3V
= 2.5V
= 1.8V
OUT
OUT
OUT
V
OUT
V
V
= 3.3V
= 1.2V
V
OUT
OUT
OUT
= 2.5V
100μV/DIV
V
= 1.8V
OUT
V
= 1.5V
OUT
V
= 1.2V
OUT
1
1965 G24
400μs/DIV
V
= 1.5V
0.1
OUT
10
100
1k
FREQUENCY (Hz)
10k
100k
0.0001 0.001
0.01
10
LOAD CURRENT (A)
1965 G22
1965 G23
1965f
6
Linear [ Linear ]
