 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
AAT2820IXN-5.0-T1 Datasheet(PDF) 9 Page - Advanced Analogic Technologies |
|
||||||||||||||||||||||||||||||
AAT2820IXN-5.0-T1 Datasheet(HTML) 9 Page - Advanced Analogic Technologies |
|
|
9 / 18 page  AAT2820 Triple-Output Charge Pump Regulator 2820.2006.04.1.4 9 Functional Block Diagram Soft Start 2X Charge Pump Charge Pump VREF VREF 1MHz Oscillator Reference Oscillator Over- Temperature Protection Control Logic EN IN EN/PN OUT DVRP DVRN FBP REF FBN GND C+ C- Functional Description 5V Regulated Output The main power supply is a charge pump doubler architecture used to support the high-current demand required by the application. Charge pump regulation is achieved by sensing the output volt- age through an internal resistor divider network. A switch doubling circuit is enabled when the divided output drops below a preset trip point controlled by an internal comparator. The free-running charge pump switching frequency is approximately 1MHz. The charge pump is designed to deliver 150mA of continuous current (loads greater than the maxi- mum load condition may cause permanent dam- age to the device). Dual Charge Pump Regulators The dual charge pump provides low-power regu- lated output voltages from two individual charge pumps. Using a single stage, the first charge pump inverts the supply voltage (VIN) and provides a reg- ulated negative output voltage. The second charge pump doubles VIN and provides a regulated posi- tive output voltage. These outputs use external Schottky diodes and capacitor multiplier stages (as many as required) to regulate up to ±25V. A con- stant switching frequency of 1MHz minimizes the output ripple and capacitor size. Negative Charge Pump Regulator During the first half-cycle, the P-channel MOSFET turns on and the flying capacitor C11 charges to VIN minus a diode drop (Figure 1). During the sec- ond half-cycle, the P-channel MOSFET turns off and the N-channel MOSFET turns on, level shifting C11. This connects C11 in parallel with the output reservoir capacitor C23. If the voltage across C23 minus a diode drop is less than the voltage across C11, current flows from C11 to C23 until the diode turns off. |
Similar Part No. - AAT2820IXN-5.0-T1 |
|
Similar Description - AAT2820IXN-5.0-T1 |
|
|
|
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
