Electronic Components Datasheet Search |
|
AME8818 Datasheet(PDF) 8 Page - AMETHERM Circuit Protection Thermistors |
|
AME8818 Datasheet(HTML) 8 Page - AMETHERM Circuit Protection Thermistors |
8 / 14 page AME AME8818 Low Dropout 300mA CMOS Regulator 8 Rev.A.01 n Detailed Description n Circuit Limit n Shutdown Mode n Capacitor Selection and Regulator Stability n Thermal-Overload Protection n PSRR and Operation from sources Other than Batteries Thermal-overload protection limits total power dissipation in the AME8818. When the junction temperature arrive T J = 160oC approximately, the thermal sensor signals the shut- down logic, turning off the pass transistor and allowing the IC to cool. Use a 1 µF capacitor on the AME8818 input and a 1 µF capacitor on the OUT. Larger input capacitor val- ues and lower ESR provide better supply noise rejec- tion and line transient response. To reduce output noise and improve load transient voltage dips, use larger output capacitors up to 4.7 µF. For stable op- eration over the full temperature range with load cur- rents up to 300mA, input and output capacitors should be a minimum of 1 µF by X7R. Note that some ceramic dielectrics large capacitance and ESR variation with temperature. With dielectrics such as Z5U and Y5V, it may be necessary to use 2.2 µF or more for up to 300mA load current to ensure stability at temperatures below -10oC. With X7R or X5R dielectrics, 1 µF is sufficient at all operating tem- peratures. These regulators are optimized for ceramic capacitors. Tantalum capacitors are not recommended. Bypass capacitor can be in between 0.1 µF~0.001µF. A larger capacitor improves AC ripple rejection, but also make the output come up slowly. The AME8818 is low-dropout, low quiescent-current linear regulator designed primarily for battery-powered applications. It is available with present output voltage ranging from 1.2V to 4.5V, and can supply loads up to 300mA. The AME8818 has enable-control-pin. Drive EN low to shut- down OUT. Drive EN to shutdown the entire chip, reducing supply current to 5 µA. Connected EN to logic-high or IN for normal operation. The AME8818 contains current limiters which monitor and control the pass transistor's Gate voltage, limiting the guar- anteed maximum output current to 330mA minimum. The output can be shorted to ground for an indefinite time without damaging the part. The AME8818 is designed to deliver low-dropout voltage and low quiescent currents in battery-powered system. Power-supply rejection ratio is 60dB (Typ.) at 1KHz. When operating from sources other than betteries, PSRR and transient response can be im- proved by increasing input, output and bypass capacitors(see PSRR vs Frequency Curve). |
Similar Part No. - AME8818 |
|
Similar Description - AME8818 |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.NET |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |