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| 型号： | LT8582IDKD#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 3/36页 |
| 文件大小： | 0K |
| 描述： | IC REG MULTI CONFIG ADJ 3A 24DFN |
| 标准包装： | 2,500 |
| 类型： | 升压（升压），反相，回扫，Sepic |
| 输出类型： | 可调式 |
| 输出数： | 2 |
| 输出电压： | 最高 42V |
| 输入电压： | 2.5 V ~ 22 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 200kHz ~ 2.5MHz |
| 电流 - 输出： | 3A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-WFDFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 24-DFN（7x4） |
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LT8582
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T A = 25°C. V IN = 5V, V SHDN = V IN , unless otherwise noted (Note 2). Specifications
are identical for both channels unless noted otherwise.
PARAMETER
Minimum Input Voltage V IN
V IN Overvoltage Lockout
CONDITIONS
l
MIN
22.2
TYP
2.3
24.5
MAX
2.5
27
UNITS
V
V
Positive Feedback Voltage
Negative Feedback Voltage
l
l
1.185
2
1.204
7
1.220
16
V
mV
Positive FBX Pin Bias Current
Negative FBX Pin Bias Current
V FBX = Positive Feedback Voltage, Current into Pin
V FBX = Negative Feedback Voltage, Current out of Pin
l
l
81
81
83.3
83.3
85
85.5
μA
μA
Error Amp Transconductance
Error Amp Voltage Gain
ΔI = 10μA
280
80
μmhos
V/V
Quiescent Current
Quiescent Current in Shutdown
Reference Line Regulation
V SHDN = 2.5V, Not Switching
V SHDN = 0
2.5V ≤ V IN ≤ 20V
2.1
0
0.01
2.5
1
0.05
mA
μA
%/V
Switching Frequency, f OSC
R T = 31.6kΩ
R T = 407kΩ
l
l
2.125
170
2.5
200
2.875
230
MHz
kHz
Switching Frequency in Foldback
Compared to Normal f OSC
1/6
ratio
Switching Frequency Range
Free-Running or Synchronizing
l
200
2500
kHz
SYNC High Level for Sync
SYNC Low Level for Sync
l
l
1.3
0.4
V
V
SYNC Clock Pulse Duty Cycle
Recommended Min SYNC Ratio f SYNC /f OSC
Minimum Off-Time
Minimum On-Time
V SYNC = 0V to 2V
20
3/4
45
55
80
%
ratio
ns
ns
SWA Current Limit
SWA FAULT Current Limit
Minimum Duty Cycle
Maximum Duty Cycle
Minimum Duty Cycle
Maximum Duty Cycle
l
l
l
l
1.8
1.3
2.2
1.6
2.4
1.8
2.8
2.3
3
2.5
3.5
3.0
A
A
A
A
SW Current Sharing, I SWB /I SWA
SWA and SWB Tied Together
0.79
A/A
SWA + SWB Current Limit
SWA + SWB FAULT Current Limit
Minimum Duty Cycle, I SWB /I SWA = 0.79
Maximum Duty Cycle, I SWB /I SWA = 0.79
Minimum Duty Cycle, I SWB /I SWA = 0.79
Maximum Duty Cycle, I SWB /I SWA = 0.79
l
l
l
l
3.3
2.3
4
2.8
4.3
4.1
5
4
5.4
4.5
6.3
5.4
A
A
A
A
Switch V CESAT
I SWA + I SWB = 2.75A
270
mV
SWA Leakage Current
SWB Leakage Current
V SWA = 5V, V SHDN = 0
V SWB = 5V, V SHDN = 0
0.01
0.01
1
1
μA
μA
SS Charge Current
SS Discharge Current
SS High Detection Voltage
SS Low Detection Voltage
SHDN Minimum Input Voltage High
SHDN Input Voltage Low
V SS = 30mV, Current Flows out of SS Pin
Part in FAULT, V SS = 2.1V, Current Flows into SS Pin
Part in FAULT
Part Exiting FAULT
Active Mode, SHDN Rising
Active Mode, SHDN Falling
Shutdown Mode
l
l
l
l
l
l
l
5.7
5.7
1.65
15
1.26
1.21
8.8
8.8
1.84
55
1.31
1.27
11.7
11.7
2
100
1.4
1.35
0.3
μA
μA
V
mV
V
V
V
8582f
3
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