Electronic Components Datasheet Search |
|
SP7648 Datasheet(PDF) 3 Page - Sipex Corporation |
|
SP7648 Datasheet(HTML) 3 Page - Sipex Corporation |
3 / 12 page 3 Date: 7/20/05 SP7648 Ultra-low Quiescent Current, High Efficiency Boost Regulator © Copyright 2005 Sipex Corporation PIN DESCRIPTION PIN NUMBER PIN NAME DESCRIPTION 1VBATT Battery Voltage. The startup circuitry is powered by this pin. Battery Voltage is used to calculate switch off time: TOFF = KOFF/ (VOUT - VBATT). When the battery voltage drops below 0.61V the SP7648 goes into an undervoltage lockout mode (UVLO), where the part is shut down. 2 FLASH Reference Control Input. Internal Reference defaults to 0.8V if FLASH = LOW and 0.288V if FLASH = HIGH. 3 NC (Test) No connection. This pin is bonded out for test purposes only and must be left floating in all applications. 4RLIM Current Limit Resistor. By connecting a resistor RLIM from this pin to ground the inductor peak current is set by IPEAK=1600/RLIM. The range for RLIM is 9kΩ (for 180mA) to 1.KΩ (for 1.6A). 5 SHDN Shutdown Not. Tie this pin high to VBATT, for normal operation. Pull this pin to ground to disable all circuitry inside the chip. 6FB Feedback. Connect this pin to GND for fixed +5V operation. Connect this pin to a resistor voltage divider between VOUT and GND for adjustable output operation. 7 GND Ground. Connect to ground plane. 8 PGND Power Ground. The inductor charging current flows out of this pin. 9LX Inductor Switching Node. Connect one terminal of the inductor to the positive terminal of the battery. Connect the second terminal of the inductor to this pin. The inductor charging current flows into LX, through the internal charging N-channel FET, and out the PGND pin. 10 VOUT Output Voltage. The inductor current flows out of this pin during switch off-time. It is also used as the internal regulator voltage supply. Connect this pin to the positive terminal of the output capacitor. |
Similar Part No. - SP7648 |
|
Similar Description - SP7648 |
|
|
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 |