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