LTC3520IUF-TRPBF データシートの表示（PDF） - Linear Technology
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LTC3520IUF-TRPBF Datasheet PDF : 24 Pages
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LTC3520
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
junction temperature range, otherwise specifications are at TA = 25°C, SVIN = PVIN1 = PVIN2 = PVIN3 = 3.6V, VOUT1 = 3.3V, RT = 54.9k,
unless otherwise noted.
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Feedback Voltage (FB2 Pin)
(Note 4)
l 0.771 0.790 0.809
V
Feedback Input Current (FB2 Pin)
1
50
nA
PMOS Current Limit
(Note 3)
l 0.8
1.25
A
Maximum Duty Cycle
Minimum Duty Cycle
Soft-Start Charging Current
SD2 Input High Voltage
SD2 Input Low Voltage
SD2 Input Current
VFB2 = 0.72V
VFB2 = 0.88V
l 100
%
l
0
%
6
μA
1.4
V
0.4
V
0.01
1
μA
Buck-Boost Converter
Output Voltage
l 2.2
5.25
V
PMOS Switch Resistance
0.20
Ω
NMOS Switch Resistance
0.15
Ω
NMOS Switch Leakage
PMOS Switch Leakage
Feedback Voltage (FB1 Pin)
VSW1A = VSW1B = 5V, SVIN = PVIN1 = PVIN2 = PVIN3 = 5V
0.1
5
μA
VSW1A = VSW1B = 0V, SVIN = PVIN1 = PVIN2 = PVIN3 = 5V
0.1
10
μA
l 0.766 0.782 0.798
V
Feedback Input Current (FB1 Pin)
1
50
nA
Forward Current Limit
(Note 3)
LTC3520E
LTC3520I
l 1.4
2
A
l 1.25 1.85
A
Reverse Current Limit
(Note 3)
560
mA
Burst Mode Operation Current Limit
(Note 3)
325
mA
Error Amplifier Gain
80
dB
Error Amplifier Sink Current
500
μA
Error Amplifier Source Current
14
μA
Maximum Duty Cycle
Boost (% Switch C is On)
Buck (% Switch A is On)
l 70
80
%
100
%
Minimum Duty Cycle
l
0
%
Soft-Start Charging Current
SD1, PWM1 Input High Voltage
SD1, PWM1 Input Low Voltage
SD1, PWM1 Input Current
6
μA
1.4
V
0.4
V
0.01
1
μA
Gain Block
Quiescent Current
AIN Pin Threshold Voltage
AIN Pin Input Bias Current
AOUT Sink Current
AOUT Source Current
AOUT Pin Voltage
Open Loop Gain
VAIN = 0.88V, VSD1 = VSD2 = 0V
VAIN = 0.72V, VAOUT = 1.8V
VAIN = 0.88V, VAOUT = 1.8V
VAIN = 0.72V, IAOUT = 1mA
45
μA
l 0.770 0.786 0.802
V
1
50
nA
17
mA
18
μA
25
150
mV
80
dB
3520fa
3
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