MAX8550ETI-T

更新时间： 2024-11-26 13:11:07

品牌	Logo	应用领域
美信 - MAXIM		开关电脑信息通信管理双倍数据速率
页数	文件大小	规格书
29页	455K
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数据手册
替代型号

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MAX8550ETI-T 数据手册

19-3173; Rev 2; 9/04

In t e g ra t e d DDR P o w e r-S u p p ly S o lu t io n s fo r

De s k t o p s , No t e b o o k s , a n d Gra p h ic Ca rd s

Ge n e ra l De s c rip t io n

The MAX8550/MAX8551 integrate a synchronous-buck

Fe a t u re s

Buck Controller

♦ Quick-PWM with 100ns Load-Step Response

♦ Up to 95% Efficiency

PWM controller to generate V

, a sourcing and sinking

DDQ

LDO linear regulator to generate V , and a 10mA refer-

ence output buffer to generate V . The buck controller

TTR

♦ 2V to 28V Input Voltage Range

drives two external N-channel MOSFETs to generate out-

put voltages down to 0.7V from a 2V to 28V input with out-

put currents up to 15A. The LDO can sink or source up to

1.5A continuous and 3A peak current. Both the LDO out-

put and the 10mA reference buffer output can be made

to track the REFIN voltage. These features make the

MAX8550/MAX8551 ideally suited for DDR memory appli-

cations in desktops, notebooks, and graphic cards.

♦ 1.8V/2.5V Fixed or 0.7V to 5.5V Adjustable Output

♦ Up to 600kHz Selectable Switching Frequency

♦ Programmable Current Limit with Foldback

Capability

♦ 1.7ms Digital Soft-Start and Independent

Shutdown

♦ Overvoltage/Undervoltage-Protection Option

♦ Power-Good Window Comparator

LDO Section

The PWM controller in the MAX8550/MAX8551 utilizes

Maxim’s proprietary Quick-PWM™ architecture with pro-

grammable switching frequencies of up to 600kHz. This

control scheme handles wide input/output voltage ratios

with ease and provides 100ns response to load tran-

sients while maintaining high efficiency and a relatively

constant switching frequency. The MAX8550 offers fully

programmable UVP/OVP and skip-mode options ideal in

portable applications. Skip mode allows for improved

efficiency at lighter loads. The MAX8551, which is tar-

geted towards desktop and graphic-card applications,

does not offer the pulse-skip feature.

♦ Fully Integrated VTT and VTTR Capability

♦ VTT has 3A Sourcing/Sinking Capability

♦ VTT and VTTR Outputs Track V

/ 2

REFIN

♦ All-Ceramic Output-Capacitor Designs

♦ 1.0V to 2.8V Input Voltage Range

♦ Power-Good Window Comparator

Ord e rin g In fo rm a t io n

The VTT and VTTR outputs track to within 1% of V

/ 2.

PART

TEMP RANGE

-40°C to +85°C

PIN-PACKAGE

REFIN

The high bandwidth of this LDO regulator allows excel-

lent transient response without the need for bulk capac-

itors, thus reducing cost and size.

MAX8550ETI

MAX8550ETI+

MAX8551ETI

28 5mm × 5mm TQFN

The buck controller and LDO regulators are provided with

independent current limits. Adjustable lossless foldback

current limit for the buck regulator is achieved by monitor-

ing the drain-to-source voltage drop of the low-side MOS-

FET. Ad d itiona lly, ove rvolta g e a nd und e rvolta g e

protection mechanisms are built in. Once the overcurrent

condition is removed, the regulator is allowed to enter

soft-start again. This helps minimize power dissipation

during a short-circuit condition. The MAX8550/MAX8551

allow flexible sequencing and standby power manage-

ment using the SHDNA, SHDNB, and STBY inputs.

+Denotes lead-free package.

P in Co n fig u ra t io n

TOP VIEW

TON

21 DL

OVP/UVP

(N.C. FOR

MAX8551)

BST

REF

Both the MAX8550 and MAX8551 are available in a

small 5mm × 5mm, 28-pin thin QFN package.

ILIM

18 DH

MAX8550

MAX8551

POK1

POK2

STBY

Ap p lic a t io n s

DDR I and DDR II Memory Power Supplies

Desktop Computers

OUT

15 FB

Notebooks and Desknotes

Graphic Cards

5mm x 5mm Thin QFN

Game Consoles

RAID

Typical Operating Circuit appears at end of data sheet.

Networking

Quick-PWM is a trademark of Maxim Integrated Products, Inc.

________________________________________________________________ Maxim Integrated Products

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

12 3 4 5 6 7...29

中文翻译

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MAX8550ETI-T 替代型号

型号	品牌	替代类型	描述	数据表
MAX8550ETI	MAXIM	功能相似	Integrated DDR Power-Supply Solutions for Desktops, Notebooks, and Graphic Cards

与MAX8550ETI-T相关器件

型号	品牌	获取价格	描述	数据表
MAX8550EVKIT	MAXIM	获取价格	Evaluation Kit
MAX8550-MAX8551	MAXIM	获取价格	Integrated DDR Power-Supply Solutions for Desktops, Notebooks, and Graphic Cards
MAX8551	MAXIM	获取价格	Evaluation Kit
MAX8551ETI	MAXIM	获取价格	Integrated DDR Power-Supply Solutions for Desktops, Notebooks, and Graphic Cards
MAX8551ETI/GH9	MAXIM	获取价格	Switching Controller, Current-mode, 15A, 600kHz Switching Freq-Max, BICMOS, PQCC28
MAX8551ETI/GH9-T	MAXIM	获取价格	Switching Controller, Current-mode, 15A, 600kHz Switching Freq-Max, BICMOS, PQCC28
MAX8551ETI+	MAXIM	获取价格	暂无描述
MAX8552	MAXIM	获取价格	High-Speed, Wide-Input, Single-Phase MOSFET Driver
MAX8552	ADI	获取价格	高速、宽输入范围、单相MOSFET驱动器
MAX8552ETB	MAXIM	获取价格	High-Speed, Wide-Input, Single-Phase MOSFET Driver

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