LTC3520 データシートの表示（PDF） - Linear Technology
部品番号
コンポーネント説明
メーカー
LTC3520 Datasheet PDF : 24 Pages
| |||
LTC3520
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
junction temperature range, otherwise specifications are at TA = 25°C, VIN = 3.6V, VOUT1 = 3.3V, VOUT2 = 1.8V, RT = 54.9k, unless
otherwise noted.
PARAMETER
Propagation Delay
SD3 Input High Voltage
SD3 Input Low Voltage
SD3 Input Current
CONDITIONS
AOUT Falling
MIN TYP MAX UNITS
11
μs
1.4
V
0.4
V
0.01
1
μA
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LTC3520E is guaranteed to meet performance specifications
from 0°C to 85°C. Specifications over the –40°C to 85°C operating
junction temperature range are assured by design, characterization and
correlation with statistical process controls. The LTC3520I is guaranteed
to meet performance specifications over the full –40°C to 125°C operating
junction temperature range.
Note 3: Current measurements are performed when the LTC3520 is not
switching. The current limit values in operation will be somewhat higher
due to the propagation delay of the comparators.
Note 4: The LTC3520 is tested in a proprietary non-switching test mode
that internally connects the FB2 pin to the output of the buck converter
error amplifier.
Note 5: This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature will exceed 125°C when overtemperature protection is active.
Continuous operation above the specified maximum operating junction
temperature may impair device reliability.
TYPICAL PERFORMANCE CHARACTERISTICS (TA = 25°C, unless otherwise specified)
Buck-Boost Efficiency
Lithium-Ion to 3.3V
100
300
VIN = 4.2V
90
80
VIN = 2.7V
PWM MODE
250
70
Burst Mode
OPERATION
200
60
50
150
40
30
20
10
0
1
Burst Mode
OPERATION
100
POWER LOSS
50
L = COILCRAFT
MSS6132-4.7μH
0
10
100
1000
LOAD CURRENT (mA)
3520 G01
Buck Efficiency
Lithium-Ion to 2.7V
100
800
90 Burst Mode OPERATION
700
80
600
70
60
PWM MODE
500
50
400
40
300
30
20
10 L = SUMIDA
CDRH3D16NP-4R7N
0
1
10
Burst Mode
OPERATION
POWER LOSS
100
200
100
0
1000
LOAD CURRENT (mA)
3520 G02
3520fa
4
Share Link: 