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参数资料
| 型号： | LTC3523EUD-2#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 3/16页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK BOOST SYNC ADJ 16QFN |
| 标准包装： | 2,500 |
| 类型： | 降压（降压），升压（升压） |
| 输出类型： | 可调式 |
| 输出数： | 2 |
| 输出电压： | 0.62 V ~ 5.5 V |
| 输入电压： | 1.8 V ~ 5.5 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 2.4MHz |
| 电流 - 输出： | 400mA，600mA |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-WFQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 16-QFN-EP（3x3） |
LTC3523/LTC3523-2
ELECTRICAL CHARACTERISTICS The l denotes the speci?cations which apply over the full operating
temperature range, otherwise speci?cations are at T A = 25°C. V IN1 = V IN2 = V BAT = 2.4V, V OUT = 3.3V, unless otherwise speci?ed.
PARAMETER
MODE Leakage Current
CONDITIONS
V MODE = 5.5V
MIN
TYP
0.01
MAX
1
UNITS
μA
Soft-Start Time
Step-Up Converter
500
μs
Input Voltage Range
l
1.8
5.25
V
Output Voltage Adjust Range
(Note 6)
l
1.8
5.25
V
Feedback Voltage FB1
Feedback Input Current FB1
N-Channel Switch Leakage
P-Channel Switch Leakage
N-Channel Switch On Resistance
P-Channel Switch On Resistance
V FB1 = 1.25V
V SW = 5.5V
V SW = 5.5V, V OUT = 0V
V OUT = 3.3V
V OUT = 5V
V OUT = 3.3V, I SW = 100mA
V OUT = 5V, I SW = 100mA
l
1.16
1.20
0
0.20
0.20
0.36
0.22
0.33
0.31
1.23
50
2
2
V
nA
μA
μA
Ω
Ω
Ω
Ω
Peak Inductor Current
Current Limit Delay to Output
Maximum Duty Cycle
Minimum Duty Cycle
(Note 7)
(Note 6)
V FB = 1V
V FB = 1.5V
l
l
l
600
80
1000
40
87
0
mA
ns
%
%
Step-Down Converter
Input Voltage Range
l
1.8
5.5
V
Output Voltage Range
(Note 6)
l
0.615
5.5
V
Feedback Voltage FB2
Feedback Input Current FB2
Reference Voltage Line Regulation
Output Voltage Line Regulation
Output Voltage Load Regulation
V FB2 = 0.625V
I OUT = 100mA (Notes 5, 6)
I OUT = 100mA, 1.6V < V IN < 5.5V (Note 6)
I OUT = 0mA to 600mA (Note 6)
l
585
600
0
0.04
0.04
1.0
615
50
mV
nA
%/V
%/V
%
Maximum Duty Cycle
100
%
Peak Inductor Current
N-Channel Switch On Resistance
P-Channel Switch On Resistance
SW Leakage
(Note 7)
V IN2 = 2.4V
V IN2 = 2.4V
V SHDN2 = 0V, V SW2 = 0V or 5V, V IN2 = 5.5V
l
400
650
0.33
0.58
0.20
2
mA
Ω
Ω
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 LTC3523/LTC3523-2 are guaranteed to meet performance
speci?cations from 0°C to 85°C. Speci?cations over the –40°C to 85°C
operating temperature range are assured by design, characterization and
correlation with statistical process control.
Note 3: The LTC3523/LTC3523-2 include an overtemperature
shutdown that is intended to protect the device during momentary
overload conditions. Junction temperature will exceed 125°C when the
Note 4: Current is measured into the V OUT pin since the supply is
bootstrapped to the output for the step-up. The current will re?ect to the
input supply by: (V OUT /V IN ) ? Ef?ciency. The outputs are not switching in
sleep.
Note 5: The LTC3523/LTC3523-2 are tested in a propriety test mode that
connects FB2 to the output of the error ampli?er.
Note 6: Speci?cation is guaranteed by design and not 100% tested in
production.
Note 7: Current measurements are performed when the LTC3523/
LTC3523-2 are not switching. The current limit values in operation will be
somewhat higher due to the propagation delay of the comparator.
overtemperature shutdown is active. Continuous operation above the
speci?ed maximum operating junction temperature may impair device
reliability.
3523fb
3
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