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ADP3190 Dataheets PDF



Part Number ADP3190
Manufacturers Analog Devices
Logo Analog Devices
Description 6-Bit Programmable 2/3/4-Phase Synchronous Buck Controller
Datasheet ADP3190 DatasheetADP3190 Datasheet (PDF)

www.DataSheet4U.com 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 d.

  ADP3190   ADP3190



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www.DataSheet4U.com 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 FUNCTIONAL BLOCK DIAGRAM VCC 28 RAMPADJ 14 RT 13 SHUNT REGULATOR (ADP3190 ONLY) OSCILLATOR EN 11 GND 19 DAC +150mV CSREF CURRENT BALANCING CIRCUIT UVLO SHUTDOWN AND BIAS SET CMP RESET EN 27 PWM1 CMP RESET 2-/3-/4-PHASE DRIVER LOGIC 26 PWM2 CMP RESET 25 PWM3 DAC –250mV CMP PWRGD 10 DELAY RESET CURRENT LIMIT 24 PWM4 CROWBAR APPLICATIONS 23 SW1 SW2 SW3 SW4 CSSUM CSREF Desktop PC power supplies for Next-generation Intel® processors VRM modules Games consoles 22 ILIMIT 15 21 20 EN CURRENT LIMIT CIRCUIT 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. DELAY 12 17 16 18 CSCOMP SOFT START 8 FB COMP 9 PRECISION REFERENCE VID DAC 05384-001 ADP3190 7 1 2 3 4 5 6 FBRTN VID4 VID3 VID2 VID1 VID0 VID5 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. 1 Protected by U. S. Patent Number 6,683,441; other patents pending. 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 that may result from its use. Specifications subject to change without notice. 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 owners. 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. ADP3190 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 General Description ......................................................................... 1 Functional Block Diagram .............................................................. 1 Specifications..................................................................................... 3 Absolute Maximum Ratings............................................................ 5 ESD Caution.................................................................................. 5 Pin Configuration and Function Descriptions............................. 6 Typical Performance Characteristics and Test Circuits............... 7 Theory of Operation ........................................................................ 8 Startup Sequence .......................................................................... 8 Master Clock Frequency.............................................................. 8 Output Voltage Differential Sensing .......................................... 8 Output Current Sensing .............................................................. 8 Active Impedance Control Mode............................................... 9 Current-Control Mode and Thermal Balance.......................... 9 Voltage Control .


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