ADP3207C データシートの表示（PDF） - ON Semiconductor

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ADP3207C

7-Bit Programmable, Multi-Phase Mobile, CPU Synchronous Buck Controller

ON Semiconductor 

ADP3207C

7-Bit Programmable,

Multi-Phase Mobile, CPU

Synchronous Buck

Controller

The ADP3207C is a high efficiency, multi−phase, synchronous,

buck−switching regulator controller optimized for converting

notebook battery voltage into the core supply voltage required by high

performance Intel processors. The part uses an internal 7−bit

Digital−to−Analog Converter (DAC) to read Voltage Identification

(VID) code directly from the processor that sets the output voltage.

The phase relationship of the output signals can be programmed to

provide 1−, 2−, or 3−phase operation, allowing for the construction of

up to three interleaved buck−switching stages.

The ADP3207C uses a multi−mode architecture to drive the

logic−level PWM outputs at a programmable switching frequency that

can be optimized depending on the output current requirement. The

part switches between multi−phase and single−phase operation to

maximize its effectiveness under all load conditions. In addition, the

ADP3207C includes a programmable slope function to adjust the

output voltage as a function of the load current. As a result, it is always

best positioned for a system transient.

The chip also provides accurate and reliable short−circuit

protection, adjustable current limiting, and a delayed power−good

output that accommodates On−the−Fly (OTF) output voltage changes

requested by the CPU.

The ADP3207C is specified over the extended commercial

temperature range of −10°C to 100°C and is available in a 40−lead

LFCSP.

The ADP3207CF has a soft−start time one tenth of ADP3207C.

There are no other differences between the ADP3207C and

ADP3207CF.

http://onsemi.com

LFCSP40

CASE 932AC

MARKING DIAGRAMS

ADP3207C

AWLYYWWG

ADP3207C

CF

AWLYYWWG

A

= Assembly Location

WL = Wafer Lot

YYWW = Date Code

G

= Pb−Free Package

ORDERING INFORMATION

See detailed ordering and shipping information in the package

dimensions section on page 31 of this data sheet.

Features

• 1−, 2−, or 3−Phase Operation at Up to 750 kHz per Phase

• $7 mV Worst−Case Differential Sensing Error

Overtemperature

• Input Voltage Range of 3.3 V to 22 V

• Interleaved PWM Outputs for Driving External High

Power MOSFET Drivers

• Enhanced PWM FlexModet for Excellent Load

Transient Performance

• Automatic Power−Saving Modes Maximize Efficiency

During Light Load and Deeper Sleep Operation

• Soft Transient Control Reduces Inrush Current and

Audio Noise

• Active Current Balancing Between Output Phases

• Independent Current Limit and Load Line Setting

Inputs for Additional Design Flexibility

• Built−In, Power−Good Masking Supports VID OTF

• 7−Bit Digitally Programmable 0.3 V to 1.5 V Output

• Overload and Short−Circuit Protection Latchoff Delay

• Built−In, Clock Enable Output Delays CPU Clock Until

CPU Supply Voltage Stabilizes

• Current Monitor Output Signals the Total Output Power

of the Buck Converter

• This is a Pb−Free Device

Applications

• Notebook Power Supplies for Next Generation

Intel® Processors

© Semiconductor Components Industries, LLC, 2009

1

December, 2009 − Rev. 0

Publication Order Number:

ADP3207C/D

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