ADP3170JRU Analog Devices, ADP3170JRU Datasheet

ADP3170JRU

Manufacturer Part Number

ADP3170JRU

Description

VRM 8.5 Compatible Single Phase Core Controller

Manufacturer

Analog Devices

Datasheet

1.ADP3170JRU.pdf (16 pages)

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Company:

Meier Automation Equipment Co., Limited

Part Number:

ADP3170JRU

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ADI/亚德诺

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20 000

Company:

Meier Automation Equipment Co., Limited

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ADP3170JRUZ

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20 000

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GENERAL DESCRIPTION

The ADP3170 is a highly efficient output synchronous buck

switching regulator controller optimized for converting a 5 V

main supply into the core supply voltage required by next

generation Intel Celeron processors. The ADP3170 uses an

internal 5-bit DAC to read a voltage identification (VID)

code directly from the processor, which is used to set the

output voltage between 1.05 V and 1.825 V. The ADP3170

uses a current mode, constant off-time architecture to drive two

N-channel MOSFETs at a programmable switching frequency

that can be optimized for regulator size and efficiency.

The ADP3170 also uses a unique supplemental regulation tech-

nique called Analog Devices Optimal Positioning Technology

(ADOPT) to enhance load transient performance. Active

voltage positioning results in a dc/dc converter that meets the

stringent output voltage specifications for high performance

processors, with the minimum number of output capacitors and

smallest footprint. Unlike voltage-mode and standard current-

ADOPT is a trademark of Analog Devices, Inc.

Pentium is a registered trademark of Intel Corporation

mode architectures, active voltage positioning adjusts the output

voltage as a function of the load current so that it is always

optimally positioned for a system transient. The ADP3170 also

provides accurate and reliable short circuit protection and

adjustable current limiting. It also includes an integrated

overvoltage crowbar function to protect the microprocessor

from destruction in case the core supply exceeds the nominal

programmed voltage by more than 20%.

The ADP3170 contains a 1.8 V linear regulator controller that

is designed to drive an external N-channel MOSFET. This linear

regulator can be used to generate auxiliary voltages (such as 1.8 V

standby power) required in most motherboard designs, and has

been designed to provide a high bandwidth load-transient response.

The ADP3170 is specified over the commercial temperature range

of 0 C to 70 C and is available in a 20-lead TSSOP package.

LRDRV

COMP

LRFB

GND

REF

Single Phase Core Controller

1.8V

REFERENCE

AND BIAS

UVLO

FUNCTIONAL BLOCK DIAGRAM

VCC

3.0V

ADP3170

REF

OSCILLATOR

VID3

VRM 8.5 Compatible

REF

VID2

CROWBAR

VID1

DAC

VID

CMP

RESET

VID0

SET

VID25

ADP3170

LOGIC

DAC +20%

DAC –20%

PWM

DRVH

DRVL

PGND

PWRGD

CS–

CS+

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