LT3587
TYPICAL PERFORMANCE CHARACTERISTICS
Specifications are at TA = 25°C unless otherwise noted.
Switches Current Limit
Switching Frequency
vs Temperature
vs Temperature
Switches VCESAT vs Current
0.5
0.4
0.3
0.2
0.1
0
1.2
1.20
1.10
1.00
0.90
0.80
V
= 3.6V
SW3
V
= 3.6V
V
= 3.6V
VIN
VIN
VIN
DUTY CYCLE = 60%
1.0
0.8
0.6
0.4
0.2
0
SW2
SW1
SW1
SW2
SW3
0
0.2
0.4
0.6
0.8
1
1.2
–50 –25
0
25
50
75 100 125
–50 –25
0
25
50
75 100 125
SW CURRENT (A)
TEMPERATURE (°C)
TEMPERATURE (°C)
3587 G09
3587 G10
3587 G08
SW1 and SW2 Current Limit
vs EN/SS1 Voltage
SW3 Current Limit
vs EN/SS3 Voltage
Switches Current Limit
vs Duty Cycle
1.6
1.2
0.8
0.4
0
0.5
0.4
0.3
0.2
0.1
0
2.5
2.0
1.5
1.0
0.5
0
V
= 3.6V
V
= 3.6V
VIN
V
= 3.6V
VIN
VIN
SW2
DUTY CYCLE = 60%
SW3
SW2
SW1
SW1
SW3
0.5 0.7 0.9 1.1 1.3 1.5 1.7 1.9 2.1 2.3 2.5
0.5 0.7 0.9 1.1 1.3 1.5 1.7 1.9 2.1 2.3 2.5
0
10 20 30 40 50 60 70 80 90 100
EN/SS1 VOLTAGE (V)
EN/SS3 VOLTAGE (V)
DUTY CYCLE (%)
3587 G12
3587 G13
3587 G11
EN/SS1, EN/SS3 Pull-Up Current
In Shutdown vs Temperature
Output Disconnects On Resistance
Output Disconnects Current Limit
vs Temperature
vs Temperature (RDISC1, RDISC3
)
14
12
10
8
200.0
167.5
135.0
102.5
70
1.50
1.25
1.00
0.75
0.50
V
I
= 3.6V
V
V
= 3.6V
= V = 15V
VOUT3
V
= 3.6V
VIN
VIN
VOUT1
VIN
= 50mA
= 20mA
EN/SS1 = EN/SS3 = 0V
VOUT1
VOUT3
I
I
R
DISC3
VOUT1
R
DISC1
6
I
VOUT3
4
2
–50 –25
0
25
50
75 100 125
–50 –25
0
25
50
75 100 125
–50 –25
0
25
50
75 100 125
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
3587 G14
3587 G15
3587 G16
3587fc
5
Linear [ Linear ]
