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ADP3190JRQZ-RL Datasheet(PDF) 1 Page - Analog Devices |
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ADP3190JRQZ-RL Datasheet(HTML) 1 Page - Analog Devices |
1 / 28 page 6-Bit, Programmable 2-/3-/4-Phase, Synchronous Buck Controller ADP3190 FEATURES Selectable 2-, 3-, or 4-phase operation at up to 1 MHz per phase ±9.5 mV worst-case differential sensing error over temperature Logic-level PWM outputs for interface to external high power drivers PWM Flex-ModeTM architecture for excellent load transient performance Active current balancing between all output phases Built-in power good/crowbar blanking supports on-the-fly VID code changes 6-bit digitally programmable 0.8375 V to 1.6 V output Programmable short circuit protection with programmable latch-off delay APPLICATIONS Desktop PC power supplies for Next-generation Intel® processors VRM modules Games consoles GENERAL DESCRIPTION The ADP3190/ADP3190A1 are highly efficient, multiphase, synchronous buck switching regulator controllers optimized for converting a 5 V or 12 V main supply into the core supply voltage required by high performance Intel processors. They use an internal 6-bit DAC to read a voltage identification (VID) code directly from the processor, which is used to set the output voltage between 0.8375 V and 1.6 V. The devices use a multimode PWM architecture to drive the logic-level outputs at a programmable switching frequency that can be optimized for VR size and efficiency. The phase relationship of the output signals can be programmed to provide 2-, 3-, or 4-phase operation, allowing for the construction of up to four complementary buck switching stages. The ADP3190/ADP3190A also include programmable, no-load offset and slope functions to adjust the output voltage as a function of the load current, so it is always optimally positioned for a system transient. The ADP3190/ADP3190A also provide 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. 1 Protected by U. S. Patent Number 6,683,441; other patents pending. FUNCTIONAL BLOCK DIAGRAM VCC PRECISION REFERENCE SOFT START DELAY UVLO SHUTDOWN AND BIAS OSCILLATOR GND ADP3190 DELAY ILIMIT PWRGD RT RAMPADJ PWM2 PWM3 PWM4 SW1 CSSUM CSCOMP SW2 SW3 SW4 CSREF PWM1 COMP VID DAC DAC +150mV DAC –250mV CSREF EN CURRENT LIMIT CIRCUIT CROWBAR CURRENT LIMIT CMP CMP CURRENT BALANCING CIRCUIT CMP CMP 2-/3-/4-PHASE DRIVER LOGIC EN SET RESET RESET RESET RESET SHUNT REGULATOR (ADP3190 ONLY) 18 20 21 22 23 24 25 26 27 13 14 28 EN 11 19 10 15 12 FBRTN 7 VID4 1 VID3 2 VID2 3 VID1 4 VID0 5 VID5 6 FB 8 9 17 16 Figure 1. The ADP3190 is a replacement for the ADP3188. A built-in shunt regulator allows the part to be connected to the 12 V system supply through a series resistor. The devices are specified over the commercial temperature range of 0°C to +85°C and are available in a 28-lead TSSOP and a 28-lead QSOP. Rev. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2006 Analog Devices, Inc. All rights reserved. |
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