Moteur de recherche de fiches techniques de composants électroniques |
|
SI-3050N Fiches technique(PDF) 6 Page - Allegro MicroSystems |
|
SI-3050N Fiches technique(HTML) 6 Page - Allegro MicroSystems |
6 / 10 page 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 SI-3018LSA LOW-VOLTAGE, HIGH-CURRENT 1.8 V LINEAR REGULATOR TM 6 APPLICATIONS INFORMATION Thermal protection and heat sinking. Thermal protection circuitry turns off the device should the junction temperature rise above 135 °C. This is intended only to protect the device from failures due to excessive junction temperatures and should not imply that high-temperature operation is permitted. Ambient temperature is affected by air circulation and proximity to other heat-producing components. Normal operation is resumed when the junction temperature is reduced. Output terminals 7 and 8 are the lead frame and substrate of the pass transistor and provide a low thermal-resistance path for heat sinking. In general, the maximum ambient temperature has the most effect on determining the heat sinking that is needed to maintain a safe normal operating junction temperature. The maximum heat sinking thermal resistance (Rθ JA) can be calculated as Rθ JA = (135 – TA) / IO (VI – 1.8) where T A is the maximum ambient temperature in °C, I O is the maximum output (load) current in amperes, and V I is the maximum input voltage in volts. The following graph gives the required copper foil area (soldered to leads 7 and 8) to provide the required thermal resistance. Note that more is always better and both sides of the printed wiring board can be used. ENABLE input. The ENABLE input includes an internal pull- 100 200 300 500 JUNCTION-TO-AMBIENT THERMAL RESISTANCE in °°°°C/W 90 Dwg. GK-031 130 110 120 100 1000 2000 GLASS-EPOXY PRINTED WIRING BOARD down resistor. If this terminal is not connected (open-circuit fault), the device output is turned off. Overcurrent protection. The SI-3018LSA includes an overcurrent protection circuit, which limits the output current at start up. It thus cannot be used with 1) a constant-current load, 2) a power supply with positive and negative to a common load (center-tap type power supply), 3) a series power supply, or 4) a diode or resistor in series with the device ground to raise the output voltage. Input voltage. Including ripple voltage and transients, the minimum input voltage should be greater than the sum of the output voltage and the maximum rated dropout voltage; the maximum input voltage must be less than the absolute maximum rated input voltage (16 V). In most applications, the input voltage (terminal 1, V I) and the supply voltage (terminal 3, V S) are connected together. Output capacitor. A 22 µF tantalum electrolytic capacitor is recommended between the output and ground. Very-low ESR capacitors should not be used. Input capacitor. A 0.1 µF to 10 µF tantalum capacitor is recommended between the input and ground to prevent oscilla- tion. |
Numéro de pièce similaire - SI-3050N |
|
Description similaire - SI-3050N |
|
|
Lien URL |
Politique de confidentialité |
ALLDATASHEET.FR |
ALLDATASHEET vous a-t-il été utile ? [ DONATE ] |
À propos de Alldatasheet | Publicité | Contactez-nous | Politique de confidentialité | Echange de liens | Fabricants 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 |