LTC3520 Linear Technology, LTC3520 Datasheet - Page 3

• Manufacturer Part Number: LTC3520
• Description: Synchronous 1A Buck-Boost and 600mA Buck Converters
• Manufacturer: Linear Technology

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ELECTRICAL CHARACTERISTICS
PARAMETER
Feedback Voltage (FB2 Pin)
Feedback Input Current (FB2 Pin)
PMOS Current Limit
Maximum Duty Cycle
Minimum Duty Cycle
Soft-Start Charging Current
⎯ S ⎯ D ⎯ 2 Input High Voltage
⎯ S ⎯ D ⎯ 2 Input Low Voltage
⎯ S ⎯ D ⎯ 2 Input Current
Buck-Boost Converter
Output Voltage
PMOS Switch Resistance
NMOS Switch Resistance
NMOS Switch Leakage
PMOS Switch Leakage
Feedback Voltage (FB1 Pin)
Feedback Input Current (FB1 Pin)
Forward Current Limit
Reverse Current Limit
Burst Mode Operation Current Limit
Error Amplifi er Gain
Error Amplifi er Sink Current
Error Amplifi er Source Current
Maximum Duty Cycle
Minimum Duty Cycle
Soft-Start Charging Current
⎯ S ⎯ D ⎯ 1 , PWM1 Input High Voltage
⎯ S ⎯ D ⎯ 1 , PWM1 Input Low Voltage
⎯ S ⎯ D ⎯ 1 , PWM1 Input Current
Gain Block
Quiescent Current
A
A
A
A
A
Open Loop Gain
temperature range, otherwise specifi cations are at T
otherwise noted.
IN
IN
OUT
OUT
OUT
Pin Threshold Voltage
Pin Input Bias Current
Sink Current
Source Current
Pin Voltage
CONDITIONS
(Note 4)
(Note 3)
V
V
V
V
(Note 3)
(Note 3)
(Note 3)
Boost (% Switch C is On)
Buck (% Switch A is On)
V
V
V
V
FB2
FB2
SW1A
SW1A
AIN
AIN
AIN
AIN
= 0.88V, V
= 0.72V, V
= 0.88V, V
= 0.72V, I
= 0.72V
= 0.88V
= V
= V
A
SW1B
SW1B
= 25°C, S
AOUT
AOUT
AOUT
⎯ S ⎯ D ⎯ 1
= 5V, S
= 0V, S
The
= V
= 1mA
= 1.8V
= 1.8V
●
⎯ S ⎯ D ⎯ 2
VIN
VIN
VIN
denotes the specifi cations which apply over the full operating
= P
= P
= 0V
= P
VIN1
VIN1
VIN1
= P
= P
= P
VIN2
VIN2
VIN2
= P
= P
= P
VIN3
VIN3
VIN3
= 5V
= 5V
= 3.6V, V
●
●
●
●
●
●
●
●
●
●
OUT1
0.771
0.766
0.770
MIN
100
100
0.8
1.4
2.2
1.4
1.4
70
= 3.3V, R
0.790
0.782
0.786
1.25
0.01
0.20
0.15
0.01
TYP
560
325
500
0.1
0.1
80
14
80
45
17
18
25
80
1
6
1
2
6
1
T
= 54.9k, unless
LTC3520
0.809
0.798
0.802
MAX
5.25
150
0.4
0.4
50
10
50
50
0
1
5
0
1
UNITS
3
3520f
mA
mA
mA
mV
nA
µA
µA
µA
µA
nA
dB
µA
µA
µA
µA
µA
nA
µA
dB
%
%
%
%
%
Ω
Ω
V
A
V
V
V
V
A
V
V
V