ADP3181

更新时间： 2024-11-29 21:54:15

品牌	Logo	应用领域
亚德诺 - ADI		控制器
页数	文件大小	规格书
24页	564K
描述
5-Bit or 6-Bit Programmable 2-,3-,4-Phase Synchronous Buck Controller

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ADP3181 数据手册

5-Bit or 6-Bit Programmable 2-,3-,4-Phase

Synchronous Buck Controller

ADP3181

FEATURES

FUNCTIONAL BLOCK DIAGRAM

VCC

RAMPADJ RT

Selectable 2-, 3-, or 4-phase operation at up to 1 MHz per

phase

14 13

ADP3181

14.5 mV worst-case mV 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

UVLO

SHUTDOWN

AND BIAS

OSCILLATOR

SET

GND

RESET

PWM1

CMP

DAC + 300mV

RESET

2-/3-/4-PHASE

DRIVER LOGIC

26 PWM2

CMP

CURRENT-

BALANCING

CIRCUIT

CSREF

RESET

PWM3

CMP

DAC – 250mV

RESET

PWM4

CMP

Digitally programmable output can be switched between

VRM 9 (5-bit) and VRD 10 (6-bit) VID codes for

ADP3181JRU. (VRD10 (6-bit) only for ADP3181JRQ)

PWRGD

DELAY

CURRENT

LIMIT

CROWBAR

SW1

SW2

SW3

SW4

Programmable short circuit protection with programmable

latch-off delay

ILIMIT

APPLICATIONS

Desktop PC power supplies for

next-generation Intel processors

CSSUM

CSREF

CURRENT-

LIMITING

CIRCUIT

DELAY

VRM modules

CSCOMP

SOFT

START

COMP

PRECISION

REFERENCE

VID

DAC

FBRTN CPUID

VID4 VID3 VID2 VID1 VID0

Figure 1.

GENERAL DESCRIPTION

The ADP3181 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 6-bit

DAC to read a voltage identification (VID) code directly from

the processor, which is used to set the output voltage. The

CPUID input selects whether the DAC codes match the

VRM 9 or VRD 10 specifications. It 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-, or 4-phase operation,

allowing for the construction of up to four complementary

buck-switching stages.

The ADP3181 also includes programmable no-load offset and

slope functions to adjust the output voltage as a function of the

load current so that it is always optimally positioned for a

system transient. The ADP3181 provides accurate and reliable

short-circuit protection, adjustable current limiting, and a

delayed power good output that accommodates on-the-fly

output voltage changes requested by the CPU.

The device is specified over the commercial temperature range

of 0°C to +85°C and is available in 28-lead QSOP (only VRD10

option) and TSSOP packages.

Rev. A

Information furnished by Analog Devices is believed to be accurate and reliable.

However, no responsibility is assumed by Analog Devices for its use, nor for any

infringements of patents or other rights of third parties that may result from its use.

Specifications subject to change without notice. No license is granted by implication

or otherwise under any patent or patent rights of Analog Devices. Trademarks and

registered trademarks are the property of their respective owners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

Fax: 781.461.3113

www.analog.com

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与ADP3181相关器件

型号	品牌	获取价格	描述	数据表
ADP3181JRQZ-RL	ADI	获取价格	5-Bit or 6-Bit Programmable 2-,3-,4-Phase Synchronous Buck Controller
ADP3181JRQZ-RL	ONSEMI	获取价格	SWITCHING CONTROLLER, 4000kHz SWITCHING FREQ-MAX, PDSO28, LEAD FREE, MO137AF, QSOP-28
ADP3181JRUZ-REEL	ADI	获取价格	5-Bit or 6-Bit Programmable 2-,3-,4-Phase Synchronous Buck Controller
ADP3181JRUZ-REEL	ONSEMI	获取价格	SWITCHING CONTROLLER, 4000kHz SWITCHING FREQ-MAX, PDSO28, LEAD FREE, MO153AE, TSSOP-28
ADP3182	ADI	获取价格	Adjustable Output 1-/2-/3-Phase Synchronous Buck Controller
ADP3182JRQZ-REEL	ADI	获取价格	IC SWITCHING CONTROLLER, 3000 kHz SWITCHING FREQ-MAX, PDSO20, ROHS COMPLIANT, MO-137AD, QS
ADP3182JRQZ-REEL	ROCHESTER	获取价格	SWITCHING CONTROLLER, 3000kHz SWITCHING FREQ-MAX, PDSO20, ROHS COMPLIANT, MO-137AD, QSOP-2
ADP3182JRQZ-RL	ADI	获取价格	Adjustable Output 1-/2-/3-Phase Synchronous Buck Controller
ADP3186	ADI	获取价格	5-Bit Programmable 2-/3-/4-Phase Synchronous Buck Controller
ADP3186JRQZ-REEL	ADI	获取价格	5-Bit Programmable 2-/3-/4-Phase Synchronous Buck Controller

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