Datasheet > XR76203

XR76203

更新时间： 2024-11-26 00:57:15

品牌	Logo	应用领域
艾科嘉 - EXAR		开关
页数	文件大小	规格书
20页	1126K
描述
3A/5A/8A Synchronous Step Down COT Regulator

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中文翻译

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XR76203 数据手册

XR76203/5/8

40V PowerBlox

3A/5A/8A Synchronous Step Down COT Regulator

FEATURES

General Description

 Controller, drivers, bootstrap diode and

MOSFETs integrated in one package

The XR76203, XR76205 and XR76208 are synchronous step-down regu-

lators combining the controller, drivers, bootstrap diode and MOSFETs in

a single package for point-of-load supplies. The XR76203, XR76205 and

XR76208 have load current ratings of 3A, 5A and 8A respectively. A wide

5V to 40V input voltage range allows for single supply operation from

industry standard 24V 10%, 18V-36V, and rectified 18VAC and 24VAC

rails.

 3A, 5A and 8A Step Down Regulators

 Wide 5V to 40V Input Voltage Range

 >0.6V Adjustable Output Voltage

 Proprietary Constant On-Time Control

 No Loop Compensation Required

 Stable Ceramic Output Capacitor Operation

 Programmable 200ns to 2μs On-Time

 Constant 100kHz to 800kHz Frequency

 Selectable CCM or CCM/DCM

 CCM/DCM for high efficiency at light-load

 CCM for constant frequency at light-load

With a proprietary emulated current mode Constant On-Time (COT) con-

trol scheme, the XR76203, XR76205 and XR76208 provide extremely

fast line and load transient response using ceramic output capacitors.

They require no loop compensation, simplifying circuit implementation

and reducing overall component count. The control loop also provides

0.07% load and 0.15% line regulation and maintains constant operating

frequency. A selectable power saving mode allows the user to operate in

discontinuous conduction mode (DCM) at light current loads thereby sig-

nificantly increasing the converter efficiency.

 Programmable Hiccup Current Limit with

Thermal Compensation

 Precision Enable and Power Good flag

 Programmable Soft-start

 30-pin 5x5mm QFN package

A host of protection features, including over-current, over-temperature,

short-circuit and UVLO, helps achieve safe operation under abnormal

operating conditions.

APPLICATIONS

 Distributed Power Architecture

 Point-of-Load Converters

 Power Supply Modules

The XR76203/5/8 are available in a RoHS-compliant, green/halogen-free

space-saving QFN 5x5mm package.

 FPGA, DSP, and Processor Supplies

 Base Stations, Switches/Routers, and Servers

Ordering Information – back page

Typical Application

Line Regulation

3.340

3.330

3.320

V_IN

VIN

PVIN

BST

C_BST

Enable/Mode

EN/MODE

PGOOD

V_OUT

Power Good

3.310

3.300

3.290

3.280

3.270

3.260

C_IN

XR76208

VCC

XR76205

XR76203

R_LIM

C_FF

ILIM

C_OUT

TON

AGND

C_VCC

C_SS

R_ON

PGND

10 15 20 25 30 35 40

V_IN(V)

1 / 20

exar.com/XR76203/5/8

Rev 1A

12 3 4 5 6 7...20

中文翻译

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与XR76203相关器件

型号	品牌	获取价格	描述	数据表
XR76203EL-F	EXAR	获取价格	3A/5A/8A Synchronous Step Down COT Regulator
XR76203ELMTR-F	EXAR	获取价格	Switching Regulator,
XR76203EL-Q	EXAR	获取价格	AEC-Q100 Qualified 40V PowerBlox 3A/5A/8A Synchronous Step Down COT Regulator
XR76203ELTR-F	EXAR	获取价格	Switching Regulator
XR76203ELTR-Q	EXAR	获取价格	AEC-Q100 Qualified 40V PowerBlox 3A/5A/8A Synchronous Step Down COT Regulator
XR76203EVB	EXAR	获取价格	3A/5A/8A Synchronous Step Down COT Regulator
XR76203EVB-Q	EXAR	获取价格	EVAL BOARD FOR XR76203-Q
XR76203-Q	EXAR	获取价格	AEC-Q100 Qualified 40V PowerBlox 3A/5A/8A Synchronous Step Down COT Regulator
XR76205	EXAR	获取价格	3A/5A/8A Synchronous Step Down COT Regulator
XR76205EL-F	EXAR	获取价格	3A/5A/8A Synchronous Step Down COT Regulator

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