参数资料
| 型号： | LT1185CT |
| 厂商： | Linear Technology |
| 文件页数： | 12/16页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO NEG ADJ 3A TO220 |
| 标准包装： | 50 |
| 稳压器拓扑结构： | 负，可调式 |
| 输出电压： | -2.5 V ~ -25 V |
| 输入电压： | -4.2 V ~ -35 V |
| 电压 - 压降（标准）： | 0.67V @ 3A |
| 稳压器数量： | 1 |
| 电流 - 输出： | 3A |
| 电流 - 限制（最小）： | 可调式 |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 通孔 |
| 封装/外壳： | TO-220-5 成形引线 |
| 供应商设备封装： | TO-220-5 |
| 包装： | 管件 |
LT1185
TYPICAL APPLICATIO S
Low Input Voltage Monitor Tracks Dropout Characteristics
(
)
TRIP POINT FOR V IN = V OUT 1 + R4 ? R7 + I OUT R5 ? R7
DO NOT SUBSTITUTE. OP AMP MUST HAVE COMMON MODE
+
V IN
–
+
C2
2.2 μ F
TANT
R5*
0.01 ?
R3
360k
R4**
1k
V IN
4k
REF
LT1185
GND
FB
R1
2.37k
R2
2.6k
+
+
C1
2.2 μ F V OUT
TANT
*3" #26 WIRE
**R4 DETERMINES TRIP POINT AT I OUT = 0
R6 DETERMINES INCREASE OF TRIP POINT AS I OUT INCREASES
R3 ? R6 R6
FOR VALUES SHOWN, TRIP POINT FOR V IN IS:
V OUT + 0.37V AT I OUT = 0 AND V OUT = 1.18V AT I OUT = 3A
?
RANGE EQUAL TO NEGATIVE SUPPLY
V OUT
–
R6**
1k
R7
27k
OPTIONAL HYSTERESIS
≈ 2M
3
+
LT1006 ? +
– V –
2
4
V
7
LT1185 ? TA05
“LOW” FOR LOW INPUT
OUTPUT SWINGS FROM V IN+ TO V IN–
Time Delayed Start-Up
Delay Time
+
+
4.0
D3
?
R3**
15k
D2
R LIM ***
R1
2.37k
3.5
3.0
V IN
+
C2
2.2 μ F
C3*
Q1**
REF
D1
GND
FB
+
C1
2.2 μ F
TANT
V OUT
2.5
2.0
1.5
–
V IN
LT1185
V OUT
R2
–
1.0
0.5
(
*t = (R3//R LIM )(C3) =
LT1185 ? TA06
ALL DIODES 1N4148
*SEE CHART FOR DELAY TIME VERSUS (C3)(R3//R LIM ) PRODUCT
**FOR LONG DELAY TIMES, REPLACE D2 WITH 2N3906 TRANSISTOR AND USE R3 ONLY FOR
CALCULATING DELAY TIME. R3 CAN INCREASE TO 100k
***I LIM IS ≈ 11k/R LIM , INSTEAD OF 15k, BECAUSE OF VOLTAGE DROP IN D1. TEMPERATURE
COEFFICIENT OF I LIM WILL BE ≈ 0.11%/ ° C, SO ADEQUATE MARGIN MUST BE ALLOWED
0
0
5 10 15 20
INPUT VOLTAGE (V)
R3 ? R LIM
R3 + R LIM
)
25 30
LT1185 ? TA07
(C3)
D3 PROVIDES FAST RESET OF TIMING. INPUT MUST DROP TO A LOW VALUE TO RESET TIMING
FOR COLD OPERATION
?
1185ff
12
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT1185CT#06 | 制造商:Linear Technology 功能描述: |
| LT1185CT#06PBF | 制造商:Linear Technology 功能描述:LDO Regulator Neg/Pos 2.5V to 25V-2.5V to -25V 3A 5-Pin(5+Tab) TO-220 制造商:Linear Technology 功能描述:LDO Regulator Neg/Pos -2.5V to -25V2.5V to 25V 3A 5-Pin(5+Tab) TO-220 制造商:Linear Technology 功能描述:IC REG LDO NEG ADJ 3A TO220-5 |
| LT1185CT#30 | 制造商:Linear Technology 功能描述: |
| LT1185CT#30PBF | 制造商:Linear Technology 功能描述:IC REG LDO NEG ADJ 3A TO220-5 |
| LT1185CT#33PBF | 制造商:Linear Technology 功能描述:IC REG LDO NEG ADJ 3A TO220-5 |
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