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参数资料
| 型号： | LT1073CS8-5#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 4/16页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK BST INV 5V .4A 8SOIC |
| 标准包装： | 2,500 |
| 类型： | 降压（降压），升压（升压），反相 |
| 输出类型： | 固定 |
| 输出数： | 1 |
| 输出电压： | 5V |
| 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
TYPICAL PERFOR A CE CHARACTERISTICS
Recommended Minimum
Guaranteed Minimum Output
Supply Current vs Temperature
Inductance Value
Current at 5V vs V IN
150
140
V IN = 1.5V
300
R LIM = 0 V
1000
130
120
110
250
200
100
90
80
70
60
150
100
50
100
FOR V IN > 1.6V A
68 ? RESISTOR
MUST BE CONNECTED
BETWEEN I LIM AND V IN
50
–50 –25
0
25
50
75
100
125
0
1.0 1.5
2.0
2.5 3.0
3.5
4.0
4.5
5.0
10
1.0
1.5
2.0 2.5
3.0
3.5
TEMPERATURE ( ° C)
PI FU CTIO S
1073 G07
INPUT VOLTAGE (V)
1073 G08
V IN (V)
1073 G09
I LIM (Pin 1): Connect this pin to V IN for normal use. Where
lower current limit is desired, connect a resistor between
I LIM and V IN . A 220 ? resistor will limit the switch current
to approximately 400mA.
V IN (Pin 2): Input Supply Voltage
SW1 (Pin 3): Collector of Power Transistor. For step-up
mode connect to inductor/diode. For step-down mode
connect to V IN .
SW2 (Pin 4): Emitter of Power Transistor. For step-up
mode connect to ground. For step-down mode connect to
inductor/diode. This pin must never be allowed to go more
than a Schottky diode drop below ground.
GND (Pin 5): Ground.
AO (Pin 6): Auxiliary Gain Block (GB) Output. Open collec-
tor, can sink 100 μ A.
SET (Pin 7): GB Input. GB is an op amp with positive input
connected to SET pin and negative input connected to
212mV reference.
FB/SENSE (Pin 8): On the LT1073 (adjustable) this pin
goes to the comparator input. On the LT1073-5 and
LT1073-12, this pin goes to the internal application resis-
tor that sets output voltage.
BLOCK DIAGRA S
SET
LT1073-5 and LT1073-12
+
LT1073
A2
A0
SET
+
A2
A0
V IN
–
GAIN BLOCK/ERROR AMP
–
I LIM
SW1
V IN
GAIN BLOCK/ERROR AMP
212mV
REFERENCE
A1
OSCILLATOR
Q1
212mV
I LIM
SW1
DRIVER
REFERENCE
COMPARATOR
SW2
A1
OSCILLATOR
Q1
R2
GND
COMPARATOR
DRIVER
SW2
R1
940k
SENSE
LT1073-5: R1 = 40k
LT1073-12: R2 = 16.3k
FB
1073 BD01
GND
1073 BD02
4
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相关代理商/技术参数 |
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| LT1073CS8PBF | 制造商:Linear Technology 功能描述:LT1073CS8PBF |
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