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ADP3293 Datasheet(PDF) 1 Page - ON Semiconductor |
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ADP3293 Datasheet(HTML) 1 Page - ON Semiconductor |
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1 / 30 page  © Semiconductor Components Industries, LLC, 2009 July, 2009 − Rev. 3 1 Publication Order Number: ADP3293/D ADP3293 8-Bit, Programmable 2- to 3-Phase Synchronous Buck Controller The ADP3293 is a highly efficient, multi−phase, synchronous buck switching regulator controller optimized for converting a 12 V main supply voltage into the core supply voltage of high performance Intel processors. It uses an internal 8−bit DAC to read a voltage identification (VID) code directly from the processor, to set the output voltage between 0.5 V and 1.6 V. This device uses a multi−mode control architecture to drive the logic−level PWM outputs. The switching frequency can be programmed according to VR size and efficiency. The chip can provide 2− or 3−phase operation, allowing for the construction of up to four complementary buck switching stages. The ADP3293 also includes programmable no load offset and load line slope setting function that adjusts the output voltage as a function of the load current, optimally positioning it for a system transient. The ADP3293 also provides accurate and reliable short−circuit protection, adjustable current limit, and a delayed power−good output that accommodates On−The−Fly (OTF) output voltage changes requested by the CPU. Features • Selectable 2− or 3−Phase Operation at Up to 1 MHz per Phase • ±7 mV Worse−Case Differential Sensing Error • Logic−Level PWM Outputs for Interface to External High Power Drivers • Fast−Enhanced PWM FlexModet for Excellent Load Transient Performance • TRDET to Improve Load Release • Active Current Balancing Between All Output Phases • Built−In Power−Good/Crowbar Blanking Supports Dynamic VID Code Changes • Digitally Programmable 0.5 V to 1.6 V Output Supports VR11.1 Specification • Programmable Overcurrent Protection with Programmable Latchoff Delay • This is a Pb−Free Device Typical Applications • Desktop PC Power Supplies for: ♦ Next Generation Intel ® Processors ♦ VRM Modules http://onsemi.com PIN ASSIGNMENT Device Package Shipping† ORDERING INFORMATION ADP3293JCPZ−RL LFCSP40 (Pb−Free) 2500/Tape & Reel †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. MARKING DIAGRAM Package Name LFCSP40 CASE Number 932AC ADP3293 = Device Code # = Pb−Free Package YY = Date Code ZZ = Assembly Lot Number CC = Country of Origin ADP3293 #_YYYYYY ZZZZZZZZ CCCCC PIN 1 INDICATOR 1 EN 2 PWRGD 3 FBRTN 4 FB 5 COMP 6 SS 7 DELAY 8 TRDET 9 VRHOT 10 TTSNS 23 SW3 24 SW2 25 SW1 26 ODN 27 NC 28 PWM3 29 PWM2 30 PWM1 22 NC 21 IMON TOP VIEW ADP3293 |
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