LT3021 LINER [Linear Technology], LT3021 Datasheet - Page 7

• Manufacturer Part Number: LT3021
• Description: 500mA, Low Voltage, Very Low Dropout Linear Regulator
• Manufacturer: LINER [Linear Technology]

TYPICAL PERFOR A CE CHARACTERISTICS
70
60
50
40
30
20
10
0
10
Input Ripple Rejection
V
V
I
L
IN
OUT
= 500mA
= 1.5V + 50mV
= 0.5V
100
FREQUENCY (Hz)
300
250
200
150
100
18
16
14
12
10
50
1k
0
8
6
4
2
0
0.01
RMS
0
No-Load Recovery Threshold
RMS Output Noise vs Load
Current (10Hz to 100kHz)
V
C
OUT
OUT
RIPPLE
10k
= 1.2V
= 4.7µF
0.1
OUTPUT OVERSHOOT (%)
5
C
C
LOAD CURRENT (mA)
OUT
OUT
W
100k
= 4.7µF
= 22µF
3021 G14
10
1
U
1M
15
10
100
90
80
70
60
50
40
30
20
10
0
–50
3021 G20
3021 G19
Input Ripple Rejection
V
V
I
L
IN
OUT
100
= 500mA
20
= 1.5V + 0.5V
–25
= 0.5V
0
TEMPERATURE (°C)
P-P
25
RIPPLE AT 120Hz
500mA/DIV
50
50mV/DIV
V
0.01
75
OUT
I
OUT
0.1
10
1
10
Transient Response
I
V
V
C
Output Noise Spectral Density
OUT
IN
OUT
OUT
100
V
I
C
L
OUT
OUT
= 1.5V
= 500mA
3021 G15
= 50mA TO 500mA
= 1.2V
= 22µF
= 1.2V
= 4.7µF
125
100
LT3021-1.5/LT3021-1.8
FREQUENCY (Hz)
1k
50µs/DIV
LT3021/LT3021-1.2/
–0.5
–1.0
–1.5
–2.0
–2.5
2.5
2.0
1.5
1.0
0.5
0
–50
10k
Load Regulation
∆I
V
V
*LOAD REGULATION NUMBER REFERS
TO CHANGE IN THE 200mV REFERENCE
VOLTAGE
IN
OUT
L
= 1.15V
–25
= 1mA to 500mA
= 0.5V
100k
0
TEMPERATURE (°C)
3021 G21
3021 G18
1M
25
50
75
100
3021 G17
3021fa
7
125