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| 型号： | LTC1844ES5-2.8#TRMPBF |
| 厂商： | Linear Technology |
| 文件页数： | 11/12页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 2.8V .15A TSOT23-5 |
| 产品培训模块： | More Information on LDOs |
| 标准包装： | 1 |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 2.8V |
| 输入电压： | 最高 6.5V |
| 电压 - 压降（标准）： | 0.105V @ 150mA |
| 稳压器数量： | 1 |
| 电流 - 输出： | 150mA（最小值） |
| 电流 - 限制（最小）： | 160mA |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-23-5 细型，TSOT-23-5 |
| 供应商设备封装： | TSOT-23-5 |
| 包装： | 剪切带 (CT) |
| 其它名称： | LTC1844ES5-2.8#TRMPBFCT |
LTC1844 Series
APPLICATIO N S I N FOR M ATIO N
In circuits where a backup battery is required, several
different input/output conditions can occur. The output
voltage may be held up externally while the input is either
pulled to ground, pulled to some intermediate voltage or
left open circuit. The LTC1844 features reverse current
protection to limit current draw from any supplementary
power source at the output. When V IN is pulled to ground
or is left open circuit, I IN and I OUT are less than 0.1 μ A for
V OUT = 0V to 7V.
When V IN is held constant and V OUT varied, current flow
will follow the curves shown in Figure 7. With V OUT held
below V OUT(NOM) , the LTC1844 will be in current limit
trying to pull V OUT up. With V OUT held between V OUT(NOM)
and V IN , I IN will be at the normal quiescent current level
and I OUT will be 1 μ A to 2 μ A. As V OUT is pulled above V IN ,
I OUT temporarily increases to 30 μ A until the reverse cur-
rent protection circuitry activates and reduces I OUT to less
than 10 μ A.
Alternatively, when V OUT is held constant and V IN varied,
current flow will follow Figure 8’s curves. I OUT will be less
than 10 μ A at all times except for a brief spike just below
2.7V before the reverse current protection circuitry
activates.
50
45
40
35
30
25
20
IN CURRENT
LIMIT BELOW
2.8V
LTC1844-2.8
T J = 25 ° C
V IN = 3.3V
CURRENT FLOWS
INTO PINS
100
90
80
70
60
50
40
LTC1844-2.8
T J = 25 ° C
V OUT = 2.7V
CURRENT FLOW
INTO PINS
IN CURRENT
LIMIT ABOVE
2.7V
15
10
5
I OUT
I IN
30
20
10
I IN
I OUT
0
0
0
1
2
3
4
5
6
7
0
0.5
1.0
1.5 2.0
2.5
3.0
OUTPUT VOLTAGE (V)
1844 F07
Figure 7. Reverse Current vs Output Voltage
INPUT VOLTAGE (V)
1844 F08
Figure 8. Reverse Current vs Input Voltage
1844fa
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC1844ES5-3.3#PBF | 制造商:Linear Technology 功能描述:LDO Regulator Pos 3.3V 0.15A 5-Pin TSOT-23 制造商:Linear Technology 功能描述:DP-LINREG, CUT TAPE 3.3V, Micropower, Low Noise VLDO Regulator |
| LTC1844ES5-3.3#TR | 功能描述:IC REG LDO 3.3V .15A TSOT23-5 RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 标准包装:1 系列:- 稳压器拓扑结构:正，固定式 输出电压:3.3V 输入电压:2.5 V ~ 5.5 V 电压 - 压降（标准）:0.1V @ 200mA 稳压器数量:2 电流 - 输出:300mA 电流 - 限制（最小）:350mA 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-UFQFN 供应商设备封装:8-MLPQ-UT（1.5x1.5） 包装:剪切带 (CT) 产品目录页面:1358 (CN2011-ZH PDF) 其它名称:SC560HULCT |
| LTC1844ES5-3.3#TRM | 功能描述:IC REG LDO 3.3V .15A TSOT23-5 RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 标准包装:1 系列:- 稳压器拓扑结构:正，固定式 输出电压:3.3V 输入电压:2.5 V ~ 5.5 V 电压 - 压降（标准）:0.1V @ 200mA 稳压器数量:2 电流 - 输出:300mA 电流 - 限制（最小）:350mA 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-UFQFN 供应商设备封装:8-MLPQ-UT（1.5x1.5） 包装:剪切带 (CT) 产品目录页面:1358 (CN2011-ZH PDF) 其它名称:SC560HULCT |
| LTC1844ES5-3.3#TRMPBF | 功能描述:IC REG LDO 3.3V .15A TSOT23-5 RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 产品培训模块:MIC5365/66 Ultra-small LDO Regulators 标准包装:1 系列:- 稳压器拓扑结构:正，固定式 输出电压:3V 输入电压:最高 5.5V 电压 - 压降（标准）:0.155V @ 150mA 稳压器数量:1 电流 - 输出:150mA 电流 - 限制（最小）:200mA 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:4-UDFN 裸露焊盘，4-TMLF? 供应商设备封装:4-TMLF?（1x1） 包装:Digi-Reel® 其它名称:576-3192-6 |
| LTC1844ES5-3.3#TRPBF | 功能描述:IC REG LDO 3.3V .15A TSOT23-5 RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 标准包装:1 系列:- 稳压器拓扑结构:正，固定式 输出电压:3.3V 输入电压:2.5 V ~ 5.5 V 电压 - 压降（标准）:0.1V @ 200mA 稳压器数量:2 电流 - 输出:300mA 电流 - 限制（最小）:350mA 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-UFQFN 供应商设备封装:8-MLPQ-UT（1.5x1.5） 包装:剪切带 (CT) 产品目录页面:1358 (CN2011-ZH PDF) 其它名称:SC560HULCT |
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