 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
SP6652 Datasheet(PDF) 8 Page - Sipex Corporation |
|
||||||||||||||||||||||||||||||
SP6652 Datasheet(HTML) 8 Page - Sipex Corporation |
|
|
8 / 16 page  8 May25-07 RevH SP6652 1A, High Efficiency, Current Mode PWM Buck Regulator © 2007 Sipex Corporation APPLICATIONS INFORMATION VOUT C3 10 µF R FBH R FBL SYNC SD Cc 10nF Rz 4k Ω 4.7 µH L1 R1 10 Ω C2 1 µF C1 10 µF VIN SP6652 1 2 3 4 5 10 9 8 7 6 PGND SGND FB COMP SD LX PVIN SVIN SYNC MODE VIN Complete Application Circuit. The SP6652 PWM buck regulator circuit requires 3 capacitors: 10µF for the PVIN input, 1µF input bypass for the SVIN and 10µF for the output are typically recommended. For the input capacitor, a value even larger than 10µF will help reduce input voltage ripple for applications sensitive to ripple on the battery voltage. See the Typical Per- formance Characteristics section for wave- forms on input and output ripple with 10µF capacitors. All the capacitors should be surface mount ceramic for low lead induc- tance necessary at the 1.4MHz switching frequency of the SP6652 and to obtain low ESR. This also helps improve bypassing on the input pin and ripple on the output. Ceramic capacitors with X5R or X7R tem- perature grade are recommended for most applications. A selection of recommended capacitors is included in Table 1. The 1µF SVIN input capacitor should have a series resistor of about 10Ω value connected from the input to the SVIN pin to form an RC low pass filter to remove high frequency spikes present on the input switching pin COMPONENT SELECTION PVIN. This will keep the SP6652 internal reference and other sensitive circuits noise free and ensure better output regulation. The GND returns for the PVIN capacitor and the output capacitor should be connected directly to the PGND pin, which should con- nect to the thermal pad ground located un- der the SP6652. The GND return for the 1µF SVIN capacitor should be connected to the SGND pin, which should be connected separately to the PGND pin to avoid adding PGND noise to the SP6652 SGND pin. See the Typical SP6652 Circuit Layout for de- tails on the recommended layout. Output Voltage Selection To set the output voltage for the SP6652, a pair of resistors, RF and RI are used as a voltage divider between the output voltage at the output capacitor and the FB pin and GND, as shown in the typical application cir- cuit. The recommended value for the RI re- sistor is 100KΩ to 200KΩ to keep the quies- cent current low, but not have the impedance too high at the FB pin for good regulation. |
Similar Part No. - SP6652_07 |
|
Similar Description - SP6652_07 |
|
|
|
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 |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
