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ADP3152

Analog Devices
Part Number ADP3152
Manufacturer Analog Devices
Description 5-Bit Programmable Synchronous Switching Regulator Controller
Published Mar 23, 2005
Detailed Description a FEATURES 5-Bit Digitally Programmable 1.8 V to 3.5 V Output Voltage Dual N-Channel Synchronous Driver Total Output Acc...
Datasheet PDF File ADP3152 PDF File

ADP3152
ADP3152

Overview
a 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 VCC +12V 22␮F 1␮F VCC R1 SD CMP R2 CCOMP 150pF AGND SENSE+ CT DRIVE1 5-Bit Programmable Synchronous Switching Regulator Controller for Pentium® II Processor ADP3152 GENERAL DESCRIPTION The ADP3152 is a highly efficient synchronous switching regulator controller optimized for Pentium II Processor applications where 5 V is stepped down to a digitally controlled output voltage 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 architecture to generate its precise output voltage.
The ADP3152 drives two N-channel MOSFETS in a synchronous rectified buck converter, at a maximum switching frequency 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.
VIN +5V + CIN ADP3152 IRL3103 L 2.
5␮H RSENSE 6.
7m⍀ + CO VO 1.
8V–3.
5V 14A 1nF SENSE– DRIVE2 IRL3103 PGND VID0–VID4 10BQ015 5-BIT CODE Figure 1.
Typical Application Pentium is a registered trademark of Intel Corporation.
All other trademarks are the property of their respective holders.
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 pate...


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