Datasheet > SC2440ATETRT

SC2440ATETRT

更新时间： 2024-10-02 01:12:19

品牌	Logo	应用领域
商升特 - SEMTECH		/
页数	文件大小	规格书
28页	4105K
描述
Dual 30V Step-Down Switching Regulator with 2A Switches

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中文翻译

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SC2440ATETRT 数据手册

SC2440A

Dual 30V Step-Down Switching

Regulator with 2A Switches

POWER MANAGEMENT

Features

Description



Wide Input Voltage Range: 2.8V to 30V

Two Integrated 2A Switches

Up to 2.5MHz per Channel Programmable Constant

Switching Frequency

Out of Phase Switching Reduces Input Ripple

Both Switching Regulators share a single Input Filter-

ing Capacitor, Reducing Cost

The SC2440A is a constant frequency dual current-mode

step-down regulator with integrated 30V switches. It pro-

duces two independent outputs from a common input

power supply. Channel switching frequency can be pro-

grammed up to 2.5MHz. The two regulators switch in

opposite phase, reducing input ripple current. As a result,

a smaller input filtering capacitor can be used.



External Synchronization

Cycle-by-Cycle Current-limiting

Current-mode PWM control simplifies loop compensa-

tion. Cycle-by-cycle current limiting and hiccup overload

protection reduce power dissipation during overload. The

SC2440A is output short-circuit robust.

Independent Soft-Start/Enable Pins

Independent Hiccup Overload Protection

Power Good Indicators Ease Output Sequencing

Low Shutdown Current

Thermally Enhanced ꢀ6-pin TSSOP Lead Free Pack-

age

Separate soft-start/enable pins allow independent con-

trol of each channel. Output power good indicators ease

output sequencing. The SC2440A can be synchronized to

an external clock. This eases noise filtering by eliminating

beat frequencies and confining switching noise to a nar-

row band.



Fully WEEE and RoHS Compliant

Applications



XDSL and Cable Modems

Point of Load Applications

Security Cameras

Typical Application Circuit

100k

FB1

PG OO D1

BST1

9.31k

CO M P1

680pF

1N4148

0.1µF

3.3µH

O UT1

SS1

SW 1

3.3V/1.8A

22nF

23.3k

V_IN

10µF

UPS120

SYNC

RO SC

12V ± 10%

10k

C15

13.3k

4.7µF

SC2440A

C10

SS2

22nF

UPS120

CO M P2

O UT2

14.0k

SW 2

470pF

4.4µH

5V/1.8A

40.2k

0.1µF

G ND

BST2

10µF

1N4148

FB2 PG OO D2

10k

100k

L1: Sumida C R43

L2: Falco D04012

C1, C3: M urata G RM 21BR60J106K

C15: M urata G RM 21BR61E475K

Figure 1.

1.3MHz 12V to 5V and 3.3V Step-down

Converter

Revision 2.4

ꢀ

12 3 4 5 6 7...28

中文翻译

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与SC2440ATETRT相关器件

型号	品牌	获取价格	描述	数据表
SC2440EVB	SEMTECH	获取价格	2.5 MHz Dual Switching Regulator with Integrated 2A Switches
SC2440TETRT	SEMTECH	获取价格	2.5 MHz Dual Switching Regulator with Integrated 2A Switches
SC2441	SEMTECH	获取价格	Very Low Input Voltage 2-Phase Synchronous Step-down Controllers with Step-up Converter
SC2441A	SEMTECH	获取价格	1.8V to 20V Input 2-Phase Synchronous Step-down Controllers with Step-up Converter
SC2441A_09	SEMTECH	获取价格	1.8V to 20V Input 2-Phase Synchronous Step-down Controllers with Step-up Converter
SC2441AEVB	SEMTECH	获取价格	1.8V to 20V Input 2-Phase Synchronous Step-down Controllers with Step-up Converter
SC2441ATETRT	SEMTECH	获取价格	1.8V to 20V Input 2-Phase Synchronous Step-down Controllers with Step-up Converter
SC2441EVB	SEMTECH	获取价格	Very Low Input Voltage 2-Phase Synchronous Step-down Controllers with Step-up Converter
SC2441ITSTRT	SEMTECH	获取价格	Very Low Input Voltage 2-Phase Synchronous Step-down Controllers with Step-up Converter
SC2442	SEMTECH	获取价格	High Performance Wide Input Range Dual Synchronous Buck Controller

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