參數(shù)資料
型號(hào)： AS1367-BTDT-45
廠商： AUSTRIAMICROSYSTEMS AG
元件分類： 基準(zhǔn)電壓源/電流源
英文描述： Adaptive LDO
文件頁(yè)數(shù)： 10/19頁(yè)
文件大?。?/td> 460K
代理商： AS1367-BTDT-45
www.austriamcrosystems.com
Revision 1.4
10 - 19
AS1367
Datasheet - Application Information
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 maximumone. From
this is obtained the MOSFET maximumseries resistance over temperature etc. More generally:
(EQ 1)
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 17. Graphical Representation of Dropout Voltage
Figure 17
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 nomnal, fully regulated output value. The nomnal
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 2)
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
相關(guān)PDF資料
PDF描述
AS1369-BWLT-18 200mA Micro-Sized; Package Type: CS-WLP(1x1)-4; Output Range: 1.8V
AS1369-BWLT-15 200mA Micro-Sized
AS1369-BWLT-25 200mA Micro-Sized; Package Type: CS-WLP(1x1)-4; Output Range: 2.5V
AS1369-BWLT-28 200mA Micro-Sized; Package Type: CS-WLP(1x1)-4; Output Range: 2,8V
AS1369-BWLT-33 200mA Micro-Sized; Package Type: CS-WLP(1x1)-4; Output Range: 3.3V
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AS1369 制造商:AMSCO 制造商全稱:austriamicrosystems AG 功能描述:200mA Ultra-Compact Low Dropout Regulator
AS1369_04 制造商:AMSCO 制造商全稱:austriamicrosystems AG 功能描述:200mA Ultra-Compact Low Dropout Regulator
AS1369-12 EB 制造商:AMS 功能描述:BOARD EVAL FOR AS1369-12
AS1369-12-EB 制造商:ams 功能描述:AS1369 Evaluation Board
AS1369-13 EB 制造商:AMS 功能描述:BOARD EVAL FOR AS1369-13
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