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参数资料
| 型号： | LT1073CS8#TR |
| 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： | 1 V ~ 30 V |
| 频率 - 开关： | 19kHz |
| 电流 - 输出： | 400mA |
| 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： | 8-SOIC（0.154"，3.90mm 宽） |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 8-SOIC |
LT1073
ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T A = 25 ° C. V IN = 1.5V unless otherwise specified.
SYMBOL
I REV
I LIM
PARAMETER
Reverse Battery Current
Current Limit
CONDITIONS
(Note 5)
220 ? Between I LIM and V IN
MIN
TYP
750
400
MAX
UNITS
mA
mA
Current Limit Temperature Coefficient
–0.3
%/ ° C
I LEAK
V SW2
Switch OFF Leakage Current
Maximum Excursion Below GND
Measured at SW1 Pin
I SW1 ≤ 10 μ A, Switch Off
1
–400
10
–350
μ A
mV
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 point
of the comparator fall within the 202mV to 222mV range.
Note 4: 100k resistor connected between a 5V source and the AO pin.
Note 5: The LT1073 is guaranteed to withstand continuous application of
1.6V applied to the GND and SW2 pins while V IN , I LIM and SW1 pins are
grounded.
Note 3: This specification guarantees that the output voltage of the fixed
versions will always fall within the specified range. The waveform at the
SENSE pin will exhibit a sawtooth shape due to the comparator hysteresis.
TYPICAL PERFOR A CE CHARACTERISTICS
Saturation Voltage Step-Up Mode
Switch ON Voltage Step-Down Mode
(SW2 Pin Grounded)
(SW1 Pin Connected to V IN )
Maximum Switch Current vs R LIM
1.2
1.0
V IN = 1.5V
1.4
1.3
1200
1100
1000
V IN = 3V
L = 82 μ H
0.8
V IN = 1.25V
1.2
900
800
0.6
V IN = 1V
V IN = 5V
1.1
1.0
700
600
0.4
0.2
V IN = 3V
V IN = 2V
0.9
0.8
500
400
300
V IN = 1.5V
200
0
0
0.2
0.4
0.6
0.8
1.0
1.2
0.7
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
100
10
100
1000
I SWITCH (A)
FB Pin Bias Current vs
Temperature
1073 G01
I SWITCH (A)
SET Pin Bias Current vs
Temperature
1073 G02
R LIM ( ? )
“Gain Block” Gain
1073 G03
20
18
16
14
200
175
150
125
1800
1600
1400
1200
V IN = 1.5V
R L = 100k
1000
12
100
800
10
8
6
75
50
25
600
400
200
4
–50 –25
0
25
50
75
100
125
0
–50 –25
0
25
50
75
100
125
0
–50 –25
0
25
50
75
100
125
TEMPERATURE ( ° C)
1073 G04
TEMPERATURE ( ° C)
1073 G05
TEMPERATURE ( ° C)
1073 G06
3
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