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参数资料
| 型号： | LT1176CSW#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 3/8页 |
| 文件大小： | 0K |
| 描述： | IC REG MULTI CONFIG ADJ 20SOIC |
| 标准包装： | 1,000 |
| 类型： | 降压（降压），反相，回扫 |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 2.2 V ~ 29.8 V |
| 输入电压： | 8 V ~ 35 V |
| 频率 - 开关： | 100kHz |
| 电流 - 输出： | 1A |
| 同步整流器： | 无 |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-SOIC（0.295"，7.50mm 宽） |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 20-SOIC |
LT1176/LT1176-5
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications ar e at T A = 25°C. T J = 25°C, V IN 25V, unless otherwise noted.
PARAMETER
Switch ON Voltage (Note 2)
Switch OFF Leakage
Supply Current (Note 3)
Minimum Supply Voltage
CONDITIONS
I SW = 0.2A
I SW = 1A
V IN = 25V, V SW = 0
V IN = V MAX , V SW = 0 (Note 8)
V FB = 2.5V, V IN ≤ 35V
V SHDN = 0.1V (Device Shutdown) (Note 9)
Normal Mode
Startup Mode (Note 4)
l
l
l
l
l
l
MIN
TYP
7.5
140.0
7.3
3.5
MAX
1.1
1.4
150
250
10
300
8.0
4.8
UNITS
V
V
μA
μA
mA
μA
V
V
Switch Current Limit (Note 5)
Maximum Duty Cycle
Switching Frequency
Switching Frequency Line Regulation
I LIM Open
R LIM = 10k (Note 6)
R LIM = 7k (Note 6)
V FB = 0V Through 2k (Note 5) (LT1176)
V SENSE = 0V (Note 5) (LT1176-5)
8V ≤ V IN ≤ V MAX (Note 8)
l
l
l
l
1.2
85
90
85
1.7
1.2
0.8
90
100
20
20
0.03
2.2
110
120
0.1
A
A
A
%
kHz
kHz
kHz
kHz
%/V
Error Amplifier Voltage Gain (Note 10)
1V ≤ V C ≤ 4V
2000
V/V
Error Amplifier Transconductance (Note 10)
3700
5000
8000
μmho
Error Amplifier Source and Sink Current
Feedback Pin Bias Current (LT1176)
Source (V FB = 2V or V SENSE = 4V)
Sink (V FB = 2.5V or V SENSE = 5.5V)
V FB = V REF
l
100.0
0.7
140
1.0
0.5
225.0
1.6
2
μA
mA
μA
Reference Voltage (LT1176)
Reference Voltage Tolerance (LT1176)
Sense Voltage (LT1176-5)
Sense Voltage Tolerance (LT1176-5)
Sense Pin Divider Resistance (LT1176-5)
Output Voltage Line Regulation
V C Voltage at 0% Duty Cycle
V C = 2V
V REF (Nominal) = 2.21V
All Conditions of Input Voltage, Output Voltage,
Temperature and Load Current
V C = 2V
V OUT (Nominal) = 5V
All Conditions of Input Voltage,
Temperature and Load Current
8V ≤ V IN ≤ V MAX (Note 8)
Overtemperature
l
l
l
l
l
l
2.155
4.85
3
2.21
±0.5
±1.0
5
±0.5
±0.1
5
0.005
1.5
–4.0
2.265
±2
±3
5.15
±2
±3
8
0.02
V
%
%
V
%
%
kΩ
%/V
V
mV/°C
Multiplier Reference Voltage
24
V
Shutdown Pin Current
Shutdown Thresholds
Status Window
Status High Level
V SHDN = 5V
V SHDN ≤ V THRESHOLD ( @ 2.5V)
Switch Duty Cycle = 0
Fully Shutdown
As a Percent of Output Voltage
I STATUS = 10μA Sourcing
l
l
l
l
l
5
2.2
0.1
±4
3.5
10
2.45
0.30
±5
4.5
20
50
2.7
0.5
±6
5.0
μA
μA
V
V
%
V
11765fb
3
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