LT1965T-1.8(RevA) Ver la hoja de datos (PDF) - Linear Technology
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LT1965T-1.8 Datasheet PDF : 20 Pages
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LT1965 Series
TYPICAL PERFORMANCE CHARACTERISTICS
Ripple Rejection vs Temperature
100
90
80
70
IL = 0.75A
VIN = VOUT(NOMINAL) + 1V + 0.5P-P
RIPPLE AT f = 120Hz
60
–50 –25 0 25 50 75 100 125
TEMPERATURE (°C)
1965 G35
LT1965 Minimum Input Voltage
2.5
2.0
1.5
IL = 500mA
1.0
IL = 1.1A
IL = 100mA
0.5
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1965 G36
Load Regulation
0
–5
LT1965-1.5
LT1965
–10
LT1965-1.8
–15
LT1965-2.5
LT1965-3.3
–20
VIN = VOUT(NOMINAL) + 1V
–25 (LT1965-1.5/-1.8/-2.5/-3.3)
VIN = 2.3V (LT1965)
ΔIL = 1mA TO 1.1A
–30
–50 –25 0 25 50 75
TEMPERATURE (°C)
100 125
1965 G37
Output Noise Spectral Density
1.00
COUT = 10μF
IL = 1.1A
LT1965-2.5
LT1965-3.3
0.10
LT1965-1.8
LT1965-1.5
LT1965
0.01
10
100
1k
10k
FREQUENCY (Hz)
100k
1965 G38
RMS Output Noise vs Load
Current (10Hz to 100kHz)
80
COUT = 10μF
70 IL = 1.1A
LT1965-1.8 10Hz to 100kHz
Output Noise
60
LT1965-3.3
50
LT1965-2.5
VOUT
100μV/DIV
40
LT1965-1.8
30
20
LT1965
10
LT1965-1.5
400μs/DIV
0
0.0001 0.001 0.01 0.1
LOAD CURRENT (A)
1
10
1965 G39
1965 G40
10
LT1965-3.3 Transient Response
100
VOUT = 3.3V
50
0
–50
–100
1.5
1.0
VIN = 4.3V
CIN = 10μF CERAMIC
COUT = 10μF CERAMIC
0.5
0.0
0 10 20 30 40 50 60 70 80
TIME (μs)
1965 G41
LT1965-2.5 SHDN Transient
Response
4.0
3.5
SHDN
3.0
2.5
2.0
1.5
OUTPUT
1.0
0.5
0.0
0 10 20 30 40 50 60 70 80
TIME (μs)
VIN = 3.3V
COUT = 10μF CERAMIC
RL = 2.5k, IL = 1mA FOR VOUT = 2.5V
90 100
1965 G42
1965fa
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