参数资料
型号: LT1176CN8#PBF
厂商: Linear Technology
文件页数: 3/8页
文件大小: 0K
描述: IC REG BUCK INV FLYBACK ADJ 8DIP
标准包装: 50
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:
工作温度: 0°C ~ 70°C
安装类型: 通孔
封装/外壳: 8-DIP(0.300",7.62mm)
包装: 管件
供应商设备封装: 8-PDIP
产品目录页面: 1326 (CN2011-ZH PDF)
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
%
%
%/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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