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ADP3211A

7-Bit, Programmable, Single-Phase, Synchronous Buck Controller

ON Semiconductor 

ADP3211, ADP3211A

7-Bit, Programmable,

Single-Phase, Synchronous

Buck Controller

The ADP3211 is a highly efficient, single−phase, synchronous

buck switching regulator controller. With its integrated driver, the

ADP3211 is optimized for converting the notebook battery voltage to

the supply voltage required by high performance Intel chipsets. An

internal 7−bit DAC is used to read a VID code directly from the

chip−set or the CPU and to set the GMCH render voltage or the CPU

core voltage to a value within the range of 0 V to 1.5 V.

The ADP3211 uses a multi−mode architecture. It provides

programmable switching frequency that can be optimized for

efficiency depending on the output current requirement. In addition,

the ADP3211 includes a programmable load line slope function to

adjust the output voltage as a function of the load current so that the

core voltage is always optimally positioned for a load transient. The

ADP3211 also provides accurate and reliable current overload

protection and a delayed power−good output. The IC supports

on−the−fly (OTF) output voltage changes requested by the chip−set.

The ADP3211 has a boot voltage of 1.1 V for IMVP−6.5

applications in CPU mode. The ADP3211A has a boot voltage of

1.2 V in CPU mode.

The ADP3211 is specified over the extended commercial temperature

range of −10°C to 100°C and is available in a 32−lead QFN.

Features

• Single−Chip Solution

♦ Fully Compatible with the Intel® IMVP−6.5t CPU and GMCH

Chipset Voltage Regulator Specifications Integrated MOSFET

Drivers

• Input Voltage Range of 3.3 V to 22 V

• ±7 mV Worst−Case Differentially Sensed Core Voltage Error

Overtemperature

• Automatic Power−Saving Modes Maximize Efficiency During

Light Load Operation

• Soft Transient Control Reduces Inrush Current and Audio Noise

• Independent Current Limit and Load Line Setting Inputs for

Additional Design Flexibility

• Built−in Power−Good Masking Supports Voltage Identification

(VID) OTF Transients

• 7−Bit, Digitally Programmable DAC with 0 V to 1.5 V Output

• Short−Circuit Protection

• Current Monitor Output Signal

• This is a Pb−Free Device

• Fully RoHS Compliant

• 32−Lead QFN

Applications

• Notebook Power Supplies for Next Generation Intel Chipsets

• Intel Netbook Atom Processors

http://onsemi.com

1 32

QFN32

MN SUFFIX

CASE 488AM

MARKING DIAGRAM

1

xxxxxx

xxxxxx

AWLYYWW

xxx = Specific Device Code

A = Assembly Location

WL = Wafer Lot

YY = Year

WW = Work Week

PIN ASSIGNMENT

PWRGD 1

IMON

CLKEN

FBRTN

FB

COMP

GPU

ILIM

ADP3211

ADP3211A

(top view)

VCC

BST

DRVH

SW

PVCC

DRVL

PGND

GND

ORDERING INFORMATION

See detailed ordering and shipping information in the package

dimensions section on page 31 of this data sheet.

© Semiconductor Components Industries, LLC, 2009

1

April, 2009 − Rev. 0

Publication Order Number:

ADP3211/D

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