Product Descriptions
The ADP31891 is a highly efficient, multiphase, synchronous buck switching regulator controller optimized for converting a 12 V main supply into the core supply voltage required by high performance Intel processors. It uses an internal 8-bit DAC to read a voltage identification (VID) code directly from the processor, which is used to set the output voltage between 0.5 V and 1.6 V.
This device uses 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-, 4-, or 5-phase operation, allowing for the construction of up to five complementary buck switching stages.
The ADP3189 also includes programmable no load offset and slope functions to adjust the output voltage as a function of the load current, optimally positioning it for a system transient. The ADP3189 also provides accurate and reliable short-circuit protection, adjustable current limiting, and a delayed powergood output that accommodates on-the-fly output voltage changes requested by the CPU.
The ADP3189 is specified over the extended commercial temperature range of 0°C to 85°C and is available in a 40-lead LFCSP.
Product Features
Selectable 2-, 3-, 4-, or 5-phase operation at up to 1 MHz per phase
±7.7 mV worst-case differential sensing error over temperature
Logic-level PWM outputs for interface to external high power drivers
Active current balancing between all output phases
Built-in power-good/crowbar blanking supports on-the-fly VID code changes
Digitally programmable 0.5 V to 1.6 V output supports both VR10.x and VR11 specifications
Programmable short-circuit protection with programmable latch-off delay
Product Applications
Desktop PC power supplies for
Next generation Intel® processors
VRM modules
Product Specifications
Attribute | Attribute value |
ANSM-Part# | ANSM-ADP3189JCPZ-RL |
Category | Integrated Circuits (ICs) |
Power Management (PMIC) | |
Special Purpose Regulators | |
Manufacturer | Analog Devices Inc. |
Series | - |
Packaging | Bulk |
Part Status | Obsolete |
Applications | Controller, Intel VR10, VR11 |
Voltage - Input | 12V |
Number of Outputs | 4 |
Voltage - Output | 0.5V ~ 1.6V |
Operating Temperature | 0°C ~ 85°C |
Mounting Type | Surface Mount |
Package / Case | 40-VFQFN Exposed Pad, CSP |
Supplier Device Package | 40-LFCSP (6x6) |
Base Product Number | ADP3189 |
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