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参数资料
| 型号： | LT1111IS8#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 3/16页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK BOOST INV ADJ 8SOIC |
| 标准包装： | 2,500 |
| 类型： | 降压（降压），升压（升压），反相 |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 可调 |
| 输入电压： | 2 V ~ 30 V |
| 频率 - 开关： | 72kHz |
| 电流 - 输出： | 400mA |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 105°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 8-SOIC |
LT1111
ELECTRICAL C HARA C TERISTICS The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T A = 25 ° C.V IN = 3V, Military or Commercial Version
SYMBOL
I FB
I SET
V OL
PARAMETER
Feedback Pin Bias Current
Set Pin Bias Current
Gain Block Output Low
Reference Line Regulation
CONDITIONS
LT1111, V FB = 0V
V SET = V REF
I SINK = 300 μ A, V SET = 1.00V
5V ≤ V IN ≤ 30V
2V ≤ V IN ≤ 5V
q
q
q
q
MIN
TYP
70
70
0.15
0.02
0.20
MAX
120
300
0.4
0.075
0.400
UNITS
nA
nA
V
%/V
%/V
A V
I LIM
Gain Block Gain
Current Limit
R L = 100k (Note 4)
220 ? from I LIM to V IN
q
1000
6000
400
V/V
mA
Current Limit Temperature Coefficient
q
– 0.3
%/ ° C
Switch OFF Leakage Current
Maximum Excursion Below GND
Measured at SW1 Pin, V SW1 = 12V
I SW1 ≤ 10 μ A, Switch OFF
1
– 400
10
– 350
μ A
mV
The q denotes the specifications which apply over the full operating temperature range, otherwise specifications are at T A = 25 ° C.
V IN = 3V, 0 ° C ≤ T A ≤ 70 ° C unless otherwise noted.
LT1111C
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
I Q
Quiescent Current
Switch OFF
q
300
450
μ A
f OSC
Oscillator Frequency
q
54
72
95
kH
DC
t ON
V SAT
Duty Cycle: Step-Up Mode
Step-Down Mode
Switch ON Time: Step-Up Mode
Step-Down Mode
Reference Line Regulation
SW Saturation Voltage, Step-Up Mode
SW Saturation Voltage, Step-Down Mode
Full Load
I LIM Tied to V IN
V OUT = 5V, V IN = 12V
2V ≤ V IN ≤ 5V
V IN = 3V, I SW = 650mA
V IN = 12V, I SW = 650mA
q
q
q
q
q
q
q
43
24
5.0
3.3
50
34
7
5
0.2
0.5
1.1
59
50
9.0
7.8
0.7
0.65
1.50
%
%
μ s
μ s
%/V
V
V
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: This specification guarantees that both the high and low trip points
of the comparator fall within the 1.20V to 1.30V range.
Note 3: The output voltage waveform will exhibit a sawtooth shape due to
the comparator hysteresis. The output voltage on the fixed output versions
will always be within the specified range.
Note 4: 100k resistor connected between a 5V source and the A0 pin.
1111fd
3
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