Details, datasheet, quote on part number: ADP3166JRU-REEL
PartADP3166JRU-REEL
Category
Description5-Bit Programmable 2-, 3-, 4-Phase Synchronous Buck Controller
CompanyAnalog Devices
DatasheetDownload ADP3166JRU-REEL datasheet
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Features, Applications

FEATURES Selectable or 4-Phase Operation to 1 MHz per Phase Differential Sensing Error 1% over Temperature Logic-Level PWM Outputs for Interface to External High Power Drivers Active Current Balancing between All Output Phases Built-in Power Good Blanking Supports On-the-Fly VID Code Changes 5-Bit Digitally Programmable 1.55 V Output Short-Circuit Protection with Programmable Latch-Off Delay Overvoltage Protection Crowbar Logic Output APPLICATIONS Desktop PC Power Supplies Next-Generation AMD Processors VRM Modules GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM

EN 11 UVLO SHUTDOWN AND BIAS OSCILLATOR + GND 19 CROWBAR 6 CSREF 2.1V DAC + 300mV CSREF + DAC 23 SW1 PWRGD 10 DELAY 21 SW3 ILIMIT 15 EN CURRENT LIMIT CIRCUIT SW4 17 CSSUM 16 CSREF 18 CSCOMP SOFT START COMP FB CURRENT BALANCING CIRCUIT +

The is a highly efficient, multiphase, synchronous buck switching regulator controller optimized for converting 12 V main supply into the core supply voltage required by high performance AMD processors. It uses an internal 5-bit DAC to read a voltage identification (VID) code directly from the processor, which is used to set the output voltage between 0.8 V and 1.55 V. The ADP3166 also uses a multimode PWM architecture to drive the logic-level outputs at a programmable switching frequency that can be optimized for VRM size and efficiency. The phase relationship of the output signals can be programmed to provide or 4-phase operation, allowing for the construction up to four complementary buck switching stages. The ADP3166 includes programmable no-load offset and slope functions to adjust the output voltage as a function of the load current so that it is always optimally positioned for a system transient. The ADP3166 also provides accurate and reliable short-circuit protection, adjustable current limiting, and a delayed power good output that accommodates on-the-fly output voltage changes requested by the CPU. ADP3166 is specified over the commercial temperature range to 85C and is available a 28-lead TSSOP package.

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 that may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective companies.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 www.analog.com Fax: 2003 Analog Devices, Inc. All rights reserved.

Parameter ERROR AMPLIFIER Accuracy 0.8 V Output 1.175 V Output 1.55 V Output Line Regulation Input Bias Current FBRTN Current Output Current Gain Bandwidth Product Slew Rate VID INPUTS Input Low Voltage Input High Voltage Input Current Pull-Up Resistance Internal Pull-Up Voltage VID Transition Delay Time2 No CPU Detection Turn-Off Delay Time2 OSCILLATOR Frequency Range2 Frequency Variation VFB IFB IFBRTN IO(ERR) GBW(ERR) Symbol VFB

VID code change to FB change VID code change 11111 to PWM going low fOSC fPHASE VRT VRAMPADJ IRAMPADJ VOS(CSA) IBIAS(CSA) GBWCSA VFB ICSCOMP VSW(X)CM RSW(X) ISW(X)

Output Voltage Timing Resistor Value RAMPADJ Voltage RAMPADJ Input Current Range CURRENT SENSE AMPLIFIER Offset Voltage Input Bias Current Gain Bandwidth Product Slew Rate Input Common-Mode Range Positioning Accuracy Output Voltage Range Output Current CURRENT BALANCE CIRCUIT Common-Mode Range Input Resistance Input Current Input Current Matching CURRENT LIMIT COMPARATOR Output Voltage Normal Mode In Shutdown Output Current, Normal Mode Maximum Output Current Limit Threshold Voltage Current Limit Setting Ratio Latch-Off Delay Threshold Latch-Off Delay Time

CCSCOMP 10 pF CSSUM and CSREF See Test Circuit 3 ICSCOMP 100 A

0.8 V, IILIMIT 2 V, RILIMIT 2 V VCSREF VCSCOMP, RILIMIT 250 k VCL/IILIMIT In current limit RDELAY 250 k, CDELAY 4.7 nF

Parameter SOFT START Output Current, Soft Start Mode Soft Start Delay Time ENABLE INPUT Input Low Voltage Input High Voltage Input Current POWER GOOD COMPARATOR Undervoltage Threshold Overvoltage Threshold Output Low Voltage Off-State Leakage Current Delay Time VID Code Changing VID Code Static CROWBAR COMPARATOR Crowbar Trip Point Crowbar Reset Point Crowbar Response Time Overvoltage to PWM Low Overvoltage to CRWBR High Output Voltage Low Output Voltage High PWM OUTPUTS Output Voltage Low Output Voltage High SUPPLY DC Supply Current UVLO Threshold Voltage UVLO Hysteresis Symbol IDELAY(SS) tDELAY(SS) Conditions During start-up, DELAY 2.8 V RDELAY 250 k, CDELAY 4.7 nF VID Code = 01111 Min 15 Typ 20 350 Max 25 Unit A s

VCROWBAR tCROWBAR VOL(CROWBAR) ICROWBAR(SINK) 100 A VOH(CROWBAR) ICROWBAR(SOURCE) 100 A VOL(PWM) VOH(PWM) ICC VUVLO IPWM(SINK) 400 A IPWM(SOURCE) 400 A

NOTES 1 All limits at temperature extremes are guaranteed via correlation using standard Statistical Quality Control (SQC). 2 Guaranteed by design, not tested in production. Specifications subject to change without notice.


 

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