Electronic Components Datasheet Search |
|
XRP29302AETBTR-L Datasheet(PDF) 6 Page - Exar Corporation |
|
XRP29302AETBTR-L Datasheet(HTML) 6 Page - Exar Corporation |
6 / 9 page X XR RP P2 29 93 30 02 2 3 3A A L Lo ow w D Dr ro op po ou utt V Vo olltta ag ge e R Re eg gu ulla atto or r © 2014 Exar Corporation 6/9 Rev. 1.4.0 THEORY OF OPERATION The XRP29302 incorporates protection against over-current faults, reversed load insertion, over temperature operation, and positive and negative transient voltage. THERMAL CONSIDERATIONS Although the XRP29302 offers limiting circuitry for overload conditions, it is still necessary to insure that the maximum junction temperature is not exceeded in the application. Heat will flow through the lowest resistance path, the junction-to-case path. In order to insure the best thermal flow of the component, proper mounting is required. TO-220 DESIGN EXAMPLE: Assume that VIN = 10V, VOUT = 5V, IOUT = 1.5A, TA = 50°C, θHA= 1°C/W, θCH= 2°C/W, and θJC= 3C°/W, where: TA = ambient temperature, θHA= heatsink to ambient thermal resistance θCH= case to heatsink thermal resistance θJC = junction to case thermal resistance The power calculated under these conditions is: 7.5 And the junction temperature is calculated as or 50 7.5 1 2 3 95°" Reliable operation is insured. CAPACITOR REQUIREMENTS The output capacitor is needed to insure stability and minimize the output noise. The value of the capacitor varies with the load. However, a minimum value of 10µF aluminum capacitor will guarantee stability over all load conditions. A tantalum capacitor is recommended if a faster load transient response is needed. If the power source has high AC impedance, a 0.1µF ceramic capacitor between input & ground is recommended. MINIMUM LOAD CURRENT To ensure a proper behavior of the regulator under light load, a minimum load of 5mA for XRP29302 is required. ADJUSTABLE REGULATOR DESIGN The XRP29302 is an adjustable regulator that can be programmed to any value between 1.25V and 16V using 2 external resistors, R1 and R2. The relationship between the resistors and the output voltage is: #$ #% &1.240 1( ENABLE INPUT The XRP29302 has an Enable function that switches the regulator on and off. Their thresholds are TTL compatible. When the regulator is active, approximately 20 µA flows through the Enable pin. TYPICAL APPLICATION CIRCUITS Figure 1 represents the typical implementation for an adjustable output regulator. The values of R1 and R2 set the output voltage value as follows: )*+ &1 #$ #%( A minimum value of 10kohms is recommended for R2 with a range between 10kΩ and 47kΩ. |
Similar Part No. - XRP29302AETBTR-L |
|
Similar Description - XRP29302AETBTR-L |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.COM |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | 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 |