ADP3211A ON Semiconductor, ADP3211A Datasheet

ADP3211A

Manufacturer Part Number

ADP3211A

Description

Synchronous Buck Controller

Manufacturer

ON Semiconductor

Datasheet

1.ADP3211A.pdf (32 pages)

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ADP3211, ADP3211A

7-Bit, Programmable,

Single-Phase, Synchronous

Buck Controller

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.

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.

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

1.2 V in CPU mode.

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

Features

•

Applications

•

April, 2009 − Rev. 0

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

The ADP3211 uses a multi−mode architecture. It provides

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

The ADP3211 is specified over the extended commercial temperature

Overtemperature

Light Load Operation

Additional Design Flexibility

(VID) OTF Transients

Single−Chip Solution

Input Voltage Range of 3.3 V to 22 V

±7 mV Worst−Case Differentially Sensed Core Voltage Error

Automatic Power−Saving Modes Maximize Efficiency During

Soft Transient Control Reduces Inrush Current and Audio Noise

Independent Current Limit and Load Line Setting Inputs for

Built−in Power−Good Masking Supports Voltage Identification

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

Notebook Power Supplies for Next Generation Intel Chipsets

Intel Netbook Atom Processors

♦

Chipset Voltage Regulator Specifications Integrated MOSFET

Drivers

Fully Compatible with the Intel

IMVP−6.5t CPU and GMCH

PWRGD

See detailed ordering and shipping information in the package

dimensions section on page 31 of this data sheet.

CLKEN

FBRTN

COMP

IMON

GPU

ILIM

ORDERING INFORMATION

xxx

WW = Work Week

MARKING DIAGRAM

http://onsemi.com

PIN ASSIGNMENT

= Specific Device Code

= Assembly Location

= Wafer Lot

= Year

AWLYYWW

ADP3211A

(top view)

ADP3211

xxxxxx

Publication Order Number:

CASE 488AM

MN SUFFIX

QFN32

ADP3211/D

VCC

BST

DRVH

PVCC

DRVL

PGND

GND

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