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PDF AX6641 Data sheet ( Hoja de datos )
| Número de pieza | AX6641 | |
| Descripción | Low Noise LDO Regulator | |
| Fabricantes | AXElite | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AX6641 (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
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AX6641
300mA High PSRR, Low Noise LDO
Regulator
GENERAL DESCRIPTION
The AX6641 is a low dropout, high PSRR, low noise linear regulator with very low
quiescent. The Device includes pass element, error amplifier, band-gap, current-limit and
thermal shutdown circuitry. The characteristics of low dropout voltage and less quiescent
current make it good for some critical current application, for example, some battery
powered devices. The typical quiescent current is approximately 80µA. In the shutdown
mode, the maximum supply current is approximately 2uA. Due to internal flexible design,
result in extensively fixed output voltage versions is 1.2V, 1.5V to 1.8V. Built-in current-limit
and thermal-shutdown functions prevent any fault condition from IC damage.
FEATURES
- Input voltage range : 2.9V~5.5V
- Guaranteed 300mA output current
- Low quiescent current is 80µA (typ.)
- Fixed Output voltage is 1.2V, 1.5V and 1.8V.
- High PSRR=85dB@1KHz
- Fast transient response
- Current limit and thermal shutdown protection
- Available in the 5-Pin Pb-Free TSOT-23 Package
BLOCK DIAGRAM
VIN
2uA
Current
Limit
EN Enable
SThhuetdrmowaln
Error
Amp
-+
Bandgap
BP
VOUT
GND
1/8
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.2 Mar.28, 2011
1 page  
AX6641
PD (MAX) = (TJ (MAX) - TA) / θJA
Where TJ (MAX) is the maximum junction temperature of the die (125°C) and TA is the
maximum ambient temperature. The junction to ambient thermal resistance (θJA) for
SOT-23-5 package at recommended minimum footprint is 250°C/W.
PCB Layout
An input capacitance of ≅ 1μF is required between the AX6641 input pin and ground
(the amount of the capacitance may be increased without limit), this capacitor must be
located a distance of not more than 1cm from the input and return to a clean analog ground.
Input capacitor can filter out the input voltage spike caused by the surge current due to the
inductive effect of the package pin and the printed circuit board’s routing wire. Otherwise, the
actual voltage at the VIN pin may exceed the absolute maximum rating. The output capacitor
also must be located a distance of not more than 1cm from output to a clean analog ground.
Because it can filter out the output spike caused by the surge current due to the inductive
effect of the package pin and the printed circuit board’s routing wire.
5/8
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.2 Mar.28, 2011
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet AX6641.PDF ] | |
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