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LT3028 Datasheet(PDF) 8 Page - Linear Technology

Part # LT3028
Description  Dual 100mA/500mA Low Dropout, Low Noise, Micropower Regulators with Independent Inputs
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT3028 Datasheet(HTML) 8 Page - Linear Technology

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8
LT3028
3028f
Channel-to-Channel Isolation
Output 2 Load Regulation
TYPICAL PERFOR A CE CHARACTERISTICS
TEMPERATURE (°C)
–50
0
–1
–2
–3
–4
–5
–6
–7
–8
–9
–10
050
75
3028 G35
–25
25
100
125
∆IL = 1mA TO 100mA
Output Noise Spectral Density
Output Noise Spectral Density
RMS Output Noise
vs Bypass Capacitor
Output 2
RMS Output Noise vs Load
Current (10Hz to 100kHz)
LOAD CURRENT (mA)
0.01
160
140
120
100
80
60
40
20
0
0.1
1
100
10
3028 G40
VOUT2 SET FOR 5V
VOUT2 SET FOR 5V
VOUT2 =VADJ2
VOUT2 =VADJ2
COUT2 = 10µF
TJ = 25°C
CBYP = 0
CBYP = 0.01µF
Output 1
RMS Output Noise vs Load
Current (10Hz to 100kHz)
Output 1 Load Regulation
TEMPERATURE (°C)
–50
100
3028 G36
050
–25
25
75
125
5
0
–5
–10
∆IL = 1mA TO 500mA
FREQUENCY (kHz)
0.01
1
10
100
3028 G37
0.1
10
1
0.1
0.01
VOUT SET FOR 5V
VOUT =VADJ
COUT = 10µF
CBYP = 0
IL = FULL LOAD
TJ = 25°C
FREQUENCY (kHz)
0.01
1
10
100
3028 G38
0.1
10
1
0.1
0.01
VOUT SET FOR 5V
VOUT =VADJ
COUT = 10µF
IL = FULL LOAD
TJ = 25°C
CBYP = 1000pF
CBYP = 100pF
CBYP = 0.01µF
LOAD CURRENT (mA)
0.01
160
140
120
100
80
60
40
20
0
0.1
1
3028 G41
10
100
1000
COUT1 = 10µF
TJ = 25°C
VOUT1 SET FOR 5V
VOUT1 SET FOR 5V
VOUT1 = VADJ1
VOUT1 = VADJ1
CBYP = 0
CBYP = 0.01µF
FREQUENCY (Hz)
10
40
50
60
70
80
100
1k
1M
10k
100k
3028 G34
30
20
10
0
90
100
CHANNEL 2
GIVEN CHANNEL IS TESTED
WITH 50mVRMS SIGNAL ON
OPPOSING CHANNEL, BOTH
CHANNELS DELIVERING FULL
CURRENT
TJ = 25°C
CHANNEL 1
CBYP (pF)
10
80
100
120
140
100
1000
10000
3028 G39
60
40
20
0
OUTPUT 2
OUTPUT 2
VOUT = 5V
VOUT = 1.22V
OUTPUT 1
OUTPUT 1
COUT = 10µF
IL = FULL LOAD
fBW = 10Hz TO 100kHz
TJ = 25°C
VOUT1
20mV/DIV
VOUT2
20mV/DIV
COUT1 = 22µF50µs/DIV
3028 G50
COUT2 = 10µF
CBYP1 = CBYP2 = 0.01µF
∆IL1 = 50mA TO 500mA
∆IL2 = 10mA TO 100mA
VIN = 6V, VOUT1 = VOUT2 = 5V
Channel-to-Channel Isolation


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