LT3080 - Adjustable 1.1A Single Resistor Low Dropout Regulator

LT3080
TYPICAL PERFOR A CE CHARACTERISTICS
CONTROL PIN CURRENT (mA)
RIPPLE REJECTION (dB)
25
20
15
10
5
6
0
0
100
90
80
70
60
50
40
30
VCONTROL Pin Currrent
I LOAD = 1.1A
I LOAD = 1mA
U W
Ripple Rejection - Single Supply
V IN = V CONTROL = V OUT (NOMINAL) + 2V
I LOAD = 1.1A
DEVICE IN
CURRENT LIMIT
6 12 18 24 30 36*
INPUT-TO-OUTPUT DIFFERENTIAL (V)
*SEE NOTE 9 IN ELECTRICAL
CHARACTERISTICS TABLE
RIPPLE = 50mV P–P
I LOAD = 100mA
20
10
0
COUT = 2.2μF CERAMIC
10 100 1k 10k 100k 1M
FREQUENCY (Hz)
RIPPLE REJECTION (dB)
80
79
78
77
76
75
74
73
72
71
70
–50
3080 G18
3080 G21
CONTROL PIN CURRENT (mA)
RIPPLE REJECTION (dB)
30
25
20
15
10
5
0
0
V CONTROL Pin Current
V CONTROL – V OUT = 2V
VIN – V OUT = 1V
T J = –50°C
TJ = 125°C
0.2 0.4 0.6 0.8
LOAD CURRENT (A)
Ripple Rejection - Dual Supply
- VCONTROL Pin
Ripple Rejection (120Hz) Noise Spectral Density
SINGLE SUPPLY OPERATION
VIN = V OUT(NOMINAL) + 2V
RIPPLE = 500mVP-P, f=120Hz
ILOAD = 1.1A
CSET = 0.1μF, C OUT = 2.2μF
–25 0 25 50 75 100 125 150
TEMPERATURE (°C)
ERROR AMPLIFIER NOISE SPECTRAL DENSITY (nV/√Hz)
10k
1k
100
10
T J = 25°C
1.0 1.2
3080 G19
100
90
80
70
60
50
ILOAD = 1.1A
ILOAD = 100mA
40
30
20
10
0
VIN = VOUT (NOMINAL) + 1V
VCONTROL = VOUT (NOMINAL) +2V
COUT = 2.2μF CERAMIC
RIPPLE = 50mVP–P
10 100 1k 10k 100k 1M
FREQUENCY (Hz)
3080 G24
3080 G22
OUTPUT VOLTAGE (V)
RIPPLE REJECTION (dB)
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
Residual Output Voltage with
Less Than Minimum Load
0
0
SET PIN = 0V
VIN VOUT
V IN = 10V
1
0.1
10 100 1k
FREQUENCY (Hz)
10k 100k
Ripple Rejection - Dual Supply
- IN Pin
3080 G25
1k
100
10
1.0
R TEST
1k
R TEST (Ω)
REFERENCE CURRENT NOISE SPECTRAL DENSITY (pA/ √Hz)
VIN = 5V
V IN = 20V
2k
3080 G20
100
90
80
70
60
50
40
30
20
VIN = VOUT (NOMINAL) + 1V
VCONTROL = VOUT (NOMINAL) +2V
RIPPLE = 50mVP–P
10
0
COUT = 2.2μF CERAMIC
ILOAD = 1.1A
10 100 1k 10k 100k 1M
FREQUENCY (Hz)
3080 G23
3080f