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PDF AX6648 Data sheet ( Hoja de datos )
| Número de pieza | AX6648 | |
| Descripción | 100mA Ultra-Low Quiescent Current Low Dropout Regulator | |
| Fabricantes | AXElite | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AX6648 (archivo pdf) en la parte inferior de esta página. Total 10 Páginas | ||
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AX6648
100mA Ultra-Low Quiescent Current
Low Dropout Regulator
GENERAL DESCRIPTION
The AX6648 is a CMOS low dropout voltage (LDO) regulator with ultra-low quiescent
current of 4µA, designed for battery-operated applications. Wide range of output voltages
can be used, ranging from 1.2V to 3.3V.
Other features include current limit protection, thermal shutdown protection and high
output voltage accuracy. The requirement of only 1µF for input and output capacitors makes
it ideal in space-sensitive applications.
The AX6648 is available in space saving 3-pin TSOT-23-3L, 5-pin TSOT-23-5L and
6-pin TDFN-6L packages.
FEATURES
- Ultra-Low Quiescent current at 4µA
- High Output Voltage Accuracy at ±2%
- Low Dropout Voltage of 450mV at 100mA
- Wide Input Operating Voltage Range from 2 to 5.5V
- Current Limit Protection
- Thermal Shutdown Protection
- 1µF Output Capacitor Required for Stability
- Chip Enable Control (AX6648XXBT and AX6648XXZ6 Only)
- RoHS Compliant
- Available in the TSOT-23-3L , TSOT-23-5L and TDFN-6L Packages
BLOCK DIAGRAM
RSEN
VIN
Current
Limit
EN Power
Shutdown
Thermal
Shutdown
PMOS
VOUT
Error
Amp
-+
CF R1
Vref
R2
GND
1/10
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.2 Jan.13, 2011
1 page  
AX6648
Capacitor Selection
The ceramic capacitor is ideal for AX6648 application. The ESR of the output capacitor
affects stability. Larger value of the output capacitor decreases the peak deviations and
improves transient response for larger current changes.
The capacitor types (ceramic, aluminum, and tantalum) have different
characterizations such as voltage and temperature coefficients. All ceramic capacitors are
manufactured with a variety of dielectrics, each with different behavior across temperature
and applications. Common dielectrics used are X5R, X7R and Y5V. It is recommended to
use 1µF to 10µF X5R or X7R dielectric ceramic capacitors because X5E or X7R hold their
capacitance over wide voltage and temperature ranges than other Y5V or Z5U types. The
ESR of output capacitor is very important because it generates a zero to provide phase lead
for loop stability. The input capacitor can reduced peak current and noise at power source.
5/10
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.2 Jan.13, 2011
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet AX6648.PDF ] | |
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