LT3587
TYPICAL PERFORMANCE CHARACTERISTICS Specifications are at T = 25°C unless otherwise noted.
A
Quiescent Current
When On But Not Switching
vs Input Supply Voltage
Shutdown Quiescent Current
vs Input Supply Voltage
VIN UVLO Voltage vs Temperature
3.5
3.0
2.5
2.0
1.5
2.20
2.15
2.10
2.05
2.00
10
8
V
= EN/SS1 = EN/SS3 = 3.6V
V
= 3.6V
VIN
VIN
125°C
90°C
FB1 = V
= 1.5V
FB3
= 0V
FB3
EN/SS1 = EN/SS3 = 0V
125°C
FB2 = I
90°C
25°C
25°C
6
–40°C
–40°C
4
2
2.5
3
3.5
4
4.5
5
5.5
6
–50 –25
0
25
50
75 100 125
2.5
3
3.5
4
4.5
5
5.5
6
INPUT VOLTAGE (V)
TEMPERATURE (°C)
INPUT VOLTAGE (V)
3587 G02
3587 G03
3587 G01
FB2 Regulation Voltage
vs Temperature
FB1, VFB3 and IFB3 Regulation
Voltage vs Temperature
15
10
5
1.240
1.230
1.220
1.210
1.200
0.825
V
= 3.6V
= 1MΩ
= 100mA
V
R
R
= 3.6V
= R
VIN
FB2
VIN
FB1
R
I
= 1MΩ
VFB3
= 8.06kΩ
VNEG
IFB3
I
I
= 50mA
= 20mA
VOUT1
VOUT3
0.813
0.800
0.788
0.775
V
FB3
V
IFB3
0
FB1
–5
–10
–50 –25
0
25
50
75 100 125
–50 –25
0
25
50
75 100 125
TEMPERATURE (°C)
TEMPERATURE (°C)
3587 G05
3587 G04
FB2 Bias Current in Regulation
vs Temperature
FB1, VFB3, IFB3 Bias Current in
Regulation vs Temperature
14.50
14.25
14.00
13.75
13.50
13.25
13.00
106
104
102
100
98
–7.75
–7.85
–7.95
–8.05
–8.15
–8.25
V
= 3.6V
VIN
FB2
R
I
=1MΩ
I
= 100mA
VFB3
VNEG
I
FB1
I
IFB3
V
R
R
= 3.6V
VIN
FB1
= R
=1MΩ
VFB3
=8.06kΩ
= 50mA
= 20mA
96
IFB3
I
I
VOUT1
VOUT3
94
–50 –25
0
25
50
75 100 125
–50 –25
0
25
50
75 100 125
TEMPERATURE (°C)
TEMPERATURE (°C)
3587 G06
3587 G07
3587fc
4
Linear [ Linear ]
