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ADP3152AR Datasheet(PDF) 1 Page - Analog Devices |
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ADP3152AR Datasheet(HTML) 1 Page - Analog Devices |
1 / 12 page REV. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. a ADP3152 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 World Wide Web Site: http://www.analog.com Fax: 781/326-8703 © Analog Devices, Inc., 1998 5-Bit Programmable Synchronous Switching Regulator Controller for Pentium® II Processor FEATURES 5-Bit Digitally Programmable 1.8 V to 3.5 V Output Voltage Dual N-Channel Synchronous Driver Total Output Accuracy 1% (0 C to 70 C) High Efficiency Current-Mode Operation Short Circuit Protection Power Good Output Integrated Overvoltage Protection Crowbar 16-Lead SOIC Package VRM 8.2 Compatible APPLICATIONS Desktop PC Power Supply for: Pentium II Processor Pentium Pro Processor Pentium Processor AMD–K6 Processor VRM Modules GENERAL DESCRIPTION The ADP3152 is a highly efficient synchronous switching regu- lator controller optimized for Pentium II Processor applications where 5 V is stepped down to a digitally controlled output volt- age between 1.8 V and 3.5 V. Using a 5-bit DAC to read a voltage identification (VID) code directly from the processor, the ADP3152 uses a current mode constant off-time architec- ture to generate its precise output voltage. The ADP3152 drives two N-channel MOSFETS in a synchro- nous rectified buck converter, at a maximum switching fre- quency of 250 kHz. Using the recommended loop compensation and guidelines, the ADP3152 provides a dc/dc converter that meets Intel’s stringent transient specifications with a minimum number of output capacitors and smallest footprint. Additionally, the current mode architecture also provides guaranteed short circuit protection and adjustable current limiting. VCC SD DRIVE1 SENSE+ SENSE– DRIVE2 PGND VID0–VID4 AGND CT CMP VCC +12V 1 F 22 F R1 R2 150pF 5-BIT CODE IRL3103 VIN +5V + CIN 10BQ015 L 2.5 H IRL3103 + CO VO 1.8V–3.5V 14A RSENSE 6.7m 1nF ADP3152 CCOMP Figure 1. Typical Application Pentium is a registered trademark of Intel Corporation. All other trademarks are the property of their respective holders. |
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