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参数资料
| 型号： | LT1173CS8#TR |
| 厂商： | Linear Technology |
| 文件页数： | 4/16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： | 1.25 V ~ 50 V |
| 输入电压： | 2 V ~ 30 V |
| 频率 - 开关： | 23kHz |
| 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 |
LT1173
TYPICAL PERFOR A CE C HARA C TERISTICS
120
Quiescent Current vs Temperature
V IN = 3V
50
40
Supply Current vs Switch Current
26.0
25.5
25.0
Oscillator Frequency
110
30
V IN = 5V
24.5
24.0
100
20
10
V IN = 2V
23.5
23.0
22.5
90
0
22.0
–50
–25
0
25
50
75
100
125
0
200
400
600
800
1000
0
5
10
15
20
25
30
TEMPERATURE (°C)
PI FU C TI
S
LT1173 ?TPC06
SWITCH CURRENT (mA)
LT1173 ?TPC07
V IN (V)
LT1173 ? TPC08
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.
BLOCK D I AGRA S
LT1173
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
1.245V reference.
FB/SENSE (Pin 8): On the LT1173 (adjustable) this pin
goes to the comparator input. On the LT1173-5 and
LT1173-12, this pin goes to the internal application resis-
tor that sets output voltage.
LT1173-5, -12
SET
SET
A2
AO
V IN
A2
AO
V IN
GAIN BLOCK/
GAIN BLOCK/
ERROR AMP
I LIM
SW1
ERROR AMP
I LIM
SW1
1.245V
1.245V
REFERENCE
A1
OSCILLATOR
REFERENCE
A1
OSCILLATOR
DRIVER
GND
FB
COMPARATOR
DRIVER
SW2
LT1173 ? BD01
GND
R1
R2
753k ?
COMPARATOR
SENSE
LT1173-5: R1 = 250k ?
LT1173-12: R1 = 87.4k ?
SW2
LT1173 ? BD02
4
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PDF描述 |
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| LT1111CS8-5#TRPBF | IC REG BUCK BST INV 5V .4A 8SOIC |
| LT1111CS8-5#TR | IC REG BUCK BST INV 5V .4A 8SOIC |
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| MAX6869UK23D1S+T | IC MPU SUPERVISOR SOT23-5 |
| MAX6869UK22D6S+T | IC MPU SUPERVISOR SOT23-5 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LT11743 | 制造商:LINEAR 制造商全称:LINEAR 功能描述:High Efficiency Step-Down Switching Regulator Controllers |
| LT1175 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Micropower Low Dropout Regulators with Shutdown |
| LT1175_05 | 制造商:LINER 制造商全称:Linear Technology 功能描述:500mA Negative Low Dropout Micropower Regulator |
| LT1175_10 | 制造商:LINER 制造商全称:Linear Technology 功能描述:500mA Negative Low Dropout Micropower Regulator |
| LT1175-5 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Precision Micropower RMS-to-DC Converter |
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