 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| AT1604 5-Bit Synchronous-Rectifier PWM Controller Features Drives two N-channel MOSFETs Operates from +5V and +12V input Simple single-loop control -Voltage-mode PWM control Fast transient response - High-bandwidth error amplifier - Full 0% to 100% duty ratio Excellent output voltage regulation - 1% over line voltage and temperature TTL-compatible 5 bit digital-to-analog output voltage selection - Wide range 1.3VDc to 3.5VDC - 0.1V binary steps from 2.1VDC to 3.5VDC - 0.05V binary steps from 1.3VDC to 2.05VDC Power-good output voltage monitor Over-voltage and over-current fault monitors -Does not require extra current sensing element Small converter size -Constant frequency operation -200 kHz free-running oscillator programmable from 50 kHz to over 1 MHz General Description The AT1604 provides complete control and protection for a DC-DC converter optimized for high-performance microprocessor applications. It is designed to drive two N-channel MOSFETs in a synchronous-rectified buck topology. The AT1604 integrates all of the control, output adjustment, monitoring and protection functions into a single package. The AT1604 includes a fully-TTL compatible 5-bit digital-to-analog converter (DAC) that adjusts the output voltage from 2.1VDC to 3.5VDC in 0.1V increments and from 1.3VDC to 2.1VDC in 0.05V steps. The precision reference and voltage-mode regulator hold the selected output voltage to within 1% over temperature and line voltage variations. The AT1604 provides simple, single feedback loop, voltage-mode control with fast transient response. It includes a 200kHz free-running triangle-wave oscillator that is adjustable from below 50kHz to over 1MHz. The error amplifier features a 12MHz gain-bandwidth product and 6V/s slew rate which enable high converter bandwidth for fast transient performance. The resulting PWM duty ratio ranges from 0% to 100%. The AT1604 monitors the output voltage with a window comparator that tracks the DAC output and issues a Power Good signal when the output is within 10% of the targeted value. The AT1604 protects against over-current conditions by inhibiting PWM operation. Built-in over-voltage protection triggers an external SCR to crowbar the input supply. The AT1604 monitors the current by using the rDS(on) of the upper MOSFET, which eliminates the need for a current sensing resistor. Applications Power supply for PentiumTM, PentiumTM Pro, PowerPCTM and AlphaTM Microprocessors High-power 5V to 3.xV DC-DC regulators Low-voltage distributed power supplies 2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C. Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: service@aimtron.com.tw Preview the document, detail datasheet contact to our service department. AT1604 5-Bit Synchronous-Rectifier PWM Controller Block Diagram Pin Configuration AT1604 (20-Pin SOIC) 2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C. Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: service@aimtron.com.tw Preview the document, detail datasheet contact to our service department. |
Price & Availability of AT1604
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |