參數(shù)資料
型號(hào)： AS1364-BTDT-AD
廠商： AUSTRIAMICROSYSTEMS AG
元件分類： 基準(zhǔn)電壓源/電流源
英文描述： 1A LDO, Low Noise
文件頁(yè)數(shù)： 11/19頁(yè)
文件大?。?/td> 787K
代理商： AS1364-BTDT-AD
AS1364
Datasheet - Application Information
www.austriamicrosystems.com
Revision 1.8
11 - 19
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:
(EQ 3)
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 18. Graphical Representation of Dropout Voltage
Figure 18
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:
Efficiency =
%
(EQ 4)
Where:
I
Q
= Quiescent current of LDO
V
DROPOUT
I
LOAD
R
SERIES
=
Dropout
Voltage
100mV
V
IN
V
OUT
V
OUT
V
IN
V
OUT
V
IN
= V
OUT(TYP)
+ 0.5V
V
IN
V
V
IN
I
Q
LOAD
I
LOAD
+
------------------------I
100
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AS1364-BTDT-AD EB 制造商:ams 功能描述:Evaluation Board
AS1364-BTDT-AD-1k 功能描述:低壓差控制器 - LDO RoHS:否 制造商:Micrel 最大輸入電壓:5.5 V 輸出電壓:Adjustable 輸出電流:10 mA 負(fù)載調(diào)節(jié): 輸出類型:Adjustable, Fixed 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-23-6
AS1364-TD-18_EK_ST 功能描述:AS1364 1 - Single Channels per IC Positive Fixed Linear Voltage Regulator Evaluation Board 制造商:ams 系列:- 零件狀態(tài):有效 每 IC 通道數(shù):1 - 單 電壓 - 輸出:1.8V 電流 - 輸出:1A 電壓 - 輸入:2 V ~ 5.5 V 穩(wěn)壓器類型:正，固定式 工作溫度:-40°C ~ 85°C 板類型:完全填充 所含物品:板 使用的 IC/零件:AS1364 標(biāo)準(zhǔn)包裝:1
AS1364-TD-45_EK_ST 功能描述:AS1364 1 - Single Channels per IC Positive Fixed Linear Voltage Regulator Evaluation Board 制造商:ams 系列:- 零件狀態(tài):有效 每 IC 通道數(shù):1 - 單 電壓 - 輸出:4.5V 電流 - 輸出:1A 電壓 - 輸入:2 V ~ 5.5 V 穩(wěn)壓器類型:正，固定式 工作溫度:-40°C ~ 85°C 板類型:完全填充 所含物品:板 使用的 IC/零件:AS1364 標(biāo)準(zhǔn)包裝:1
AS1364-TD-AD_EK_ST 功能描述:AS1364 1 - Single Channels per IC Positive Adjustable Linear Voltage Regulator Evaluation Board 制造商:ams 系列:- 零件狀態(tài):有效 每 IC 通道數(shù):1 - 單 電壓 - 輸出:3.3V 電流 - 輸出:1A 電壓 - 輸入:2 V ~ 5.5 V 穩(wěn)壓器類型:正，可調(diào)式 工作溫度:-40°C ~ 85°C 板類型:完全填充 所含物品:板 使用的 IC/零件:AS1364 標(biāo)準(zhǔn)包裝:1
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