 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
SPX1582U5-3-3 Datasheet(PDF) 4 Page - Sipex Corporation |
|
||||||||||||||||||||||||||||||
SPX1582U5-3-3 Datasheet(HTML) 4 Page - Sipex Corporation |
|
|
4 / 7 page  4 Jun 17-06 Rev F SPX1582 3A Ultra Low Dropout Voltage Regulator © 2006 Sipex Corporation The SPX1582 is designed as a high performance and low cost solution for applications requiring a lower dropout than traditional NPN regulators. The SPX1582 uses a separate input voltage VCTRL ( VCTRL ≥ VOUT + 1.3V) to minimize the dropout voltage. This allows the 2.5V power for the load to come from a 3.3V system supply. As an added benefit this will reduce the heat dissipation*, and lower heatsink and cooling fan costs. The SPX1582 can power the 2.5V core voltage for microprocessors such as a PentiumPCTM, P55CTM, AMD5k86TM and K6TM and the IBM PowerPCTM 603EV and 604EV processors. A typical application would use 3.3V for VIN and 5.0V for VCTRL from a motherboard power sup- ply to provide a nominal 2.5V output. Using the sense pin provides a Kelvin measurement of output for reducing resistance-associated errors. Power Up Sequencing The SPX1582 requires a power up sequence in that VIN must be applied before VCTRL to prevent a latchup condition. If this is not possible, then a 10 Ω series resistor should be added to the VCTRL input to prevent the device from entering into latchup if VCTRL is applied before VIN. APPLICATION INFORMATION Adjustable Regulator Design 1.25V reference voltage is being developed be- tween the SENSE pin and the ADJ pin of the SPX1582. Adding two external resistors (see fig 1.) will allow setting the output voltage from 1.25V to 6V. R1 is chosen so that this current is specified at a minimum load current of 10mA. R2 is given by the formula: VOUT = VREF (1+ R2/R1) + IADJ (R2). The current flowing from the ADJ pin is typicaly 50 μA. This ADJ pin contributes to the final VOUT but is usually neglected. Connecting the sense pin to the top of the resistor divider will improve load regulation. Lowering Noise For the fixed voltage device, adding a capacitor at the GND pin will improve transient response. This capacitor is chosen in the range of 1 μF to 0.1 μF and will depend on the amount of output capacitance in the system. |
Similar Part No. - SPX1582U5-3-3 |
|
Similar Description - SPX1582U5-3-3 |
|
|
|
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 |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
