LT3022 Ver la hoja de datos (PDF) - Linear Technology
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LT3022 Datasheet PDF : 20 Pages
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LT3022/LT3022-1.2
LT3022-1.5/LT3022-1.8
TYPICAL PERFORMANCE CHARACTERISTICS
Input Ripple Rejection
100
90
80
70
60
50
40
30
20
VIN = 1.5V + 0.5VP-P RIPPLE AT 120Hz
VOUT = 0.5V
10 COUT = 10µF
IL = 1A
0
–50 –25 0 25 50 75 100 125
TEMPERATURE (°C)
3022 G23
Line Regulation
0.5
0.3
∆VIN = 1.15V TO 10V
VOUT = 0.2V
0.1 IL = 1mA
–0.1
–0.3
–0.5
–0.7
–0.9
–1.1
–1.3
–1.5
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3022 G24
Load Regulation
1.0
0.8
VIN = 1.15V
VOUT = 0.5V
0.6
∆IL = 1mA TO 1A
LOAD REGULATION NUMBER REFERS
0.4 TO CHANGE IN THE 200mV REFERENCE
VOLTAGE
0.2
0
–0.2
–0.4
–0.6
–0.8
–1.0
–50 –25
0 25 50 75 100 125
TEMPERATURE (°C)
3022 G25
No-Load Recovery Threshold
30
TJ = 25°C
25
20
15
10
5
No-Load Recovery Threshold
12
10
8
IOUT(SINK) = 5mA
6
IOUT(SINK) = 1mA
4
2
Output Noise Spectral Density
10
VOUT = 1.2V
IL = 1A
TJ = 25°C
1
COUT = 10µF
0.1
COUT = 47µF
0.01
0
0
5
10
15
20
OUTPUT OVERSHOOT (%)
3022 G26
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3022 G27
0.001
10
100
1k
10k 100k 1M
FREQUENCY (Hz)
3022 G28
RMS Output Noise vs Load
Current (10Hz to 100kHz)
200
180
VOUT = 1.2V
COUT = 10µF
160 TJ = 25°C
140
120
100
80
60
40
20
0
0.01
0.1
1
10 100 1000
LOAD CURRENT (mA)
3022 G29
Start-Up from Shutdown
VOUT
0.5V/DIV
VSHDN
1V/DIV
RL = 1.2Ω
VIN = 1.5V
VOUT = 1.2V
COUT = 10µF
50µs/DIV
Transient Response
VOUT
50mV/DIV
IOUT
500mA/DIV
3022 G30
VIN = 1.5V
50µs/DIV
VOUT = 1.2V
IOUT = 100mA to 1A
COUT = 22µF
tRISE = tFALL = 100ns
3022 G31
3022fb
9
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