参数资料
| 型号： | AS1359-BTTT-27 |
| 厂商： | ams |
| 文件页数： | 10/17页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 2.7V .3A TSOT23-5 |
| 标准包装： | 1 |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 2.7V |
| 输入电压： | 最高 5.5V |
| 电压 - 压降（标准）： | 0.17V @ 300mA |
| 稳压器数量： | 1 |
| 电流 - 输出： | 300mA（最小） |
| 工作温度： | -40°C ~ 85°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： | 标准包装 |
| 其它名称： | AS1359-BTTT-27DKR |
AS1358 / AS1359
Datasheet - A p p l i c a t i o n I n f o r m a t i o n
9 Application Information
9.1 Dropout Voltage
Dropout is the input to output voltage difference, below which the linear regulator ceases to regulate. At this point, the output voltage change
follows the input voltage change. Dropout voltage may be measured at different currents and, in particular at the regulator maximum one. From
this is obtained the MOSFET maximum series resistance over temperature etc. More generally:
V DROPOUT = I LOAD ? R SERIES
Dropout is probably the most important specification when the regulator is used in a battery application. The dropout performance of the
regulator defines the useful “end of life” of the battery before replacement or re-charge is required.
Figure 19. Graphical Representation of Dropout Voltage
V IN
(EQ 1)
V OUT
Dropout
V IN = V OUT(TYP) + 0.5V
V IN
V OUT
Voltage
V OUT
100mV
V IN
Figure 19 shows the variation of V OUT as V IN is varied for a certain load current. The practical value of dropout is the differential voltage (V OUT -
V IN ) measured at the point where the LDO output voltage has fallen by 100mV below the nominal, fully regulated output value. The nominal
regulated output voltage of the LDO is that obtained when there is 500mV (or greater) input-output voltage differential.
9.2 Efficiency
Low quiescent current and low input-output voltage differential are important in battery applications amongst others, as the regulator efficiency is
directly related to quiescent current and dropout voltage. Efficiency is given by:
V IN ? I Q + I LOAD ?
Where:
I Q = Quiescent current of LDO
V LOAD ? I LOAD
Efficiency = --------------------------------------- ? 100 %
(EQ 2)
www.austriamicrosystems.com
Revision 1.5
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| AS1359-BTTT-27 EB | 制造商:ams 功能描述:Evaluation Board |
| AS1359-BTTT-28 | 功能描述:IC REG LDO 2.8V .3A 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:8V 输入电压:10.5 V ~ 23 V 电压 - 压降（标准）:1.7V @ 40mA 稳压器数量:1 电流 - 输出:100mA（最小值） 电流 - 限制（最小）:- 工作温度:0°C ~ 125°C 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 供应商设备封装:8-SOIC 包装:剪切带 (CT) 产品目录页面:1075 (CN2011-ZH PDF) 其它名称:296-24390-1 |
| AS1359-BTTT-28 EB | 制造商:ams 功能描述:Evaluation Board |
| AS1359-BTTT-285 | 功能描述:IC REG LDO 2.85V .3A TSOT23-5 RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 标准包装:3,000 系列:- 稳压器拓扑结构:正，固定式 输出电压:2.5V 输入电压:2.5 V ~ 5.5 V 电压 - 压降（标准）:- 稳压器数量:1 电流 - 输出:300mA（最小值） 电流 - 限制（最小）:360mA 工作温度:-40°C ~ 85°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:带卷 (TR) |
| AS1359-BTTT-285 EB | 制造商:ams 功能描述:Evaluation Board |
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