SC2443

更新时间： 2024-10-01 04:05:27

品牌	Logo	应用领域
商升特 - SEMTECH		控制器
页数	文件大小	规格书
20页	1043K
描述
Dual-Phase Single or Two Output Synchronous Step-Down Controller

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SC2443 数据手册

SC2443

Dual-Phase Single or Two Output

Synchronous Step-Down Controller

POWER MANAGEMENT

Description

Features

The SC2443 is a high-frequency dual synchronous step-down

switching power supply controller. It provides out-of-phase

high-current output gate drives to all N-channel MOSFET power

stages. The SC2443 operates in synchronous continuous-con-

duction mode. Both phases are capable of maintaining regula-

tion with sourcing or sinking load currents, making the SC2443

suitable for generating both VDDQ and the tracking VTT for

DDR applications.

u Wide input voltage range: 4.7V to ꢀ6V

u 0.5V feedback voltage for low-voltage outputs

u Programmable frequency up to ꢀ MHz per phase

u 2-Phase synchronous continuous conduction mode for

high eﬃciency step-down converters

u Out-of-phase operation for low input current ripples

u Output source and sink currents

u Fixed frequency peak current-mode control

u 75mV/-ꢀꢀ0mV maximum current sense voltage

u Inductor DCR current-sensing for low-cost applications

u Dual outputs or 2-phase single output operation

u Excellent current sharing between individual phases

u Individual soft-start, overload shutdown and enable

u External reference input for DDR applications

u External synchronization

The SC2443 employs ﬁxed frequency peak current-mode con-

trol for the ease of frequency compensation and fast transient

response.

The dual-phase step-down controllers of the SC2443 can be

used to produce two individually controlled and regulated out-

puts or a single output with shared current in each phase. The

Step-down controllers operate from an input of at least 4.7V

and are capable of regulating outputs as low as 0.5V

u Industrial temperature range

u 4mm X 4mm Xꢀmm 24-lead MLPQ package

Applications

u Telecommunication power supplies

u DDR memory power supplies

u Graphic power supplies

Individual soft-start and overload shutdown timer is included

in each step-down controller. The SC2443 implements hiccup

overload protection. In single output current share conﬁgura-

tion, the master timer controls the soft-start and overload shut-

down functions of both controllers.

u Servers and base stations

Typical Application Circuit

VIN

VOUT1 VP1

VIN

VOUT1 VP1

VP1

VOUT1

VP1

VOUT1

IN1-

GDL1

PVCC

PGND

GDL2

GDH2

BST2

IN1-

GDL1

PVCC

PGND

GDL2

GDH2

BST2

COMP1

SYNC

AGND

REF

COMP1

SYNC

AGND

REF

VIN

SC2443

VOUT2

IN2-

REFIN

VIN

IN2-

Dual Independent Outputs

Single Output With Current Sharing

July 09 2007

ꢀ

12 3 4 5 6 7...20

中文翻译

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与SC2443相关器件

型号	品牌	获取价格	描述	数据表
SC2443_08	SEMTECH	获取价格	Dual-Phase Single or Two Output Synchronous Step-Down Controller
SC2443EVB	SEMTECH	获取价格	Dual-Phase Single or Two Output Synchronous Step-Down Controller
SC2443MLTRT	SEMTECH	获取价格	Dual-Phase Single or Two Output Synchronous Step-Down Controller
SC2446	SEMTECH	获取价格	Dual-Phase Single or Two Output Synchronous Step-Down Controllers
SC2446A	SEMTECH	获取价格	Dual-Phase, Single or Dual Output Synchronous Step-Down Controller
SC2446AEVB	SEMTECH	获取价格	Dual-Phase, Single or Dual Output Synchronous Step-Down Controller
SC2446AITSTRT	SEMTECH	获取价格	Dual-Phase, Single or Dual Output Synchronous Step-Down Controller
SC2446EVB	SEMTECH	获取价格	Dual-Phase Single or Two Output Synchronous Step-Down Controllers
SC2446ITETRT	SEMTECH	获取价格	Dual-Phase Single or Two Output Synchronous Step-Down Controllers
SC2446ITSTR	SEMTECH	获取价格	Dual Switching Controller, Current-mode, 3A, 1000kHz Switching Freq-Max, PDSO28, MO-153-AE

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