Electronic Components Datasheet Search |
|
MP2905EK Datasheet(PDF) 4 Page - Monolithic Power Systems |
|
MP2905EK Datasheet(HTML) 4 Page - Monolithic Power Systems |
4 / 16 page MP2905- 3V to 28V INPUT, HYSTERETIC SYNCHRONOUS STEP-DOWN CONTROLLER MP2905 Rev. 0.91 www.monolithicpower.com 4 4/18/2011 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2011. All Rights Reserved. PIN FUNCTIONS Pin# Name Description 1 FB Feedback Input. FB senses the output voltage to regulate that voltage. Drive FB with a resistive voltage divider from the output voltage. The feedback reference voltage is 0.59V. See Setting the Output Voltage. 2 SS Soft-start Control Input. SS controls the soft-start period. Connect a capacitor from SS to GND to set the soft-start period. A 0.01uF external capacitor sets the soft-start period to 4ms with an internal 84Kohm resistor. An internal 250nA current sink in hiccup mode gives approximately 10% duty cycle during fault conditions. 3 REF Internal 5V LDO output. Bypass REF to GND with a 4.7uF or greater capacitor. 4 GND Ground. Connect the exposed pad to pin 4 5 LG Low-side Gate-Drive output. Drive the synchronous-rectifier MOSFET. Connect this pin to the gate of the synchronous MOSFET. 6 BST High-Side Gate Drive Boost Input. BST supplies the drive for the high-side N-channel MOSFET switching. Connect a 0.1uF or greater capacitor from SW to BST to power the high side switch. MP2905 contains an internal BST regulator, so external schottky from REF to BST is not necessary. 7 SW Switch Output. SW is the switching node that supplies power to the output. Connect the output LC filter from SW to the output load. Note that a capacitor is required from SW to BST to power the high-side switch. 8 HG High-side gate-drive output. Drive the high-side MOSFET. Connect this pin to the gate of the high-side MOSFET 9 IN Power Input. IN supplies the power to the IC, as well as the step-down converter switches. Drive IN with a 3V to 28V power source. Bypass IN to GND with a suitably large capacitor to eliminate noise on the input to the IC. See Setting the Input Capacitor. 10 ILIM Current-limit threshold Set pin. A appropriate resistor should be connected between this pin and the drain of high-side MOSFET (IN). An internal 50uA current sink sets a voltage drop in the resistor. The voltage drop compares to high-side MOSFET voltage drop (Vds) to set the peak current-limit threshold. |
Similar Part No. - MP2905EK |
|
Similar Description - MP2905EK |
|
|
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 |