LT3587_15 Datasheet, PDF (4/24 Pages) Linear Technology – High Voltage Monolithic Inverter and Dual Boost

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
125°C
8
Quiescent Current
When On But Not Switching
vs Input Supply Voltage
3.5
V_VIN = EN/SS1 = EN/SS3 = 3.6V
FB1 = V_FB3 = 1.5V
FB2 = I_FB3 = 0V
3.0
125°C
90°C
V_IN UVLO Voltage vs Temperature
2.20
2.15
90°C
6
2.5
25°C
2.10
25°C
4
–40°C
2.0
–40°C
2.05
2
2.5 3 3.5 4 4.5 5 5.5 6
INPUT VOLTAGE (V)
3587 G01
1.5
2.5 3 3.5 4 4.5 5 5.5 6
INPUT VOLTAGE (V)
3587 G02
2.00
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3587 G03
FB1, V_FB3 and I_FB3 Regulation
Voltage vs Temperature
1.240
V_VIN = 3.6V
R_FB1 = R_VFB3 = 1MΩ
R_IFB3 = 8.06kΩ
1.230 ^{IVOUT1 = 50mA}
I_VOUT3 = 20mA
V_FB3
0.825
0.813
1.220
FB1
1.210
VIFB3
0.800
0.788
FB2 Regulation Voltage
vs Temperature
15
V_VIN = 3.6V
R_FB2 = 1MΩ
10 ^{IVNEG = 100mA}
5
0
–5
1.200
–50 –25
0 25 50 75
TEMPERATURE (°C)
0.775
100 125
3587 G04
–10
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3587 G05
FB1, V_FB3, I_FB3 Bias Current in
Regulation vs Temperature
14.50
106
14.25
I_VFB3
104
14.00
13.75
102
I_FB1
100
13.50
V_VIN = 3.6V
I_IFB3
98
R_FB1 = R_VFB3 =1MΩ
13.25 R_IFB3 =8.06kΩ
96
I_VOUT1 = 50mA
13.00 ^{IVOUT3 = 20mA}
94
–50 –25 0 25 50 75 100 125
TEMPERATURE (°C)
3587 G06
FB2 Bias Current in Regulation
vs Temperature
–7.75
–7.85
V_VIN = 3.6V
R_FB2 =1MΩ
I_VNEG = 100mA
–7.95
–8.05
–8.15
–8.25
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3587 G07
3587fc
4