Datasheet > XR77128EVB-DEMO-1

XR77128EVB-DEMO-1

更新时间： 2024-01-19 17:03:41

品牌	Logo	应用领域
艾科嘉 - EXAR		/
页数	文件大小	规格书
28页	1934K
描述
Quad Output Digital PWM/PFM

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中文翻译

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数据手册

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XR77128

Quad Output Digital PWM/PFM

Universal PMIC

FEATURES

General Description

 Quad Channel Step-down Controller

 Digital PWM 105kHz-1.23MHz Operation

 Individual Channel Frequency Selection

 Patented digital PFM with Ultrasonic mode

 Patented Over Sampling Feedback

 Programmable 5 coefficient PID control

 Integrated MOSFET Drivers

 Supports DrMOS devices

 4.75V to 5.5V and 5.5V to 25V Input Voltage

 0.6V to 5.5V Output Voltage (higher with exter-

nal feedback resistors)

The XR77128 is a quad channel digital Pulse Width Modulated (PWM)

step down (buck) controller. A wide 4.75V to 5.5V and 5.5V to 25V input

voltage range allows for single supply operation from standard power

rails.

With integrated FET gate drivers, two LDOs for standby power and a

105kHz to 1.23MHz independent channel to channel programmable con-

stant operating frequency, the XR77128 reduces overall component

count, solution footprint and optimizes conversion efficiencies. A select-

able digital Pulse Frequency Mode (PFM) capable of better than 80% effi-

ciency at light current load and low operating current allow for portable

and Energy Star compliant applications. Each XR77128 channel’s output

voltage is individually programmable down to 0.6V with a resolution of

2.5mV, and is configurable for precise soft start and soft stop sequencing,

including delay and ramp control.

 SMBus Compliant I²C Interface

 Full Power Monitoring and Reporting

 3 x 15V Capable PSIO + 2 x GPIOs

 Full Start/Stop Sequencing Support

 Built-in Thermal, Over-Current, UVLO and Out-

The XR77128 operations are fully controlled via a SMBus-compliant I C

put Over-Voltage Protections

interface allowing for advanced local and/or remote reconfiguration, full

performance monitoring and reporting as well as fault handling.

 On Board 5V and LDOOUT Standby LDOs

 On Board Non-Volatile Memory

Built-in independent output Over-Voltage, Over-Temperature, Over-Cur-

rent and Under-Voltage Lockout protections insure safe operation under

abnormal operating conditions.

 Supported by PowerArchitect™ 5.2 or later

APPLICATIONS

 Industrial Control Systems

 Automatic Test Equipment

 Video Surveillance Systems

 Automotive Infotainment

The XR77128 is offered in a RoHS compliant, “green”/halogen free 44-pin

TQFN package.

Ordering Information – back page

Typical Application

1 / 28

exar.com/XR77128

Rev 1A

12 3 4 5 6 7...28

中文翻译

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与XR77128EVB-DEMO-1相关器件

型号	品牌	获取价格	描述	数据表
XR77128EVB-DEMO-1-KITA	EXAR	获取价格	Quad Output Digital PWM/PFM
XR77129	EXAR	获取价格	40V Quad Output Digital PWM/PFM
XR77129ELB-F	EXAR	获取价格	40V Quad Output Digital PWM/PFM
XR77129ELBMTR-F	EXAR	获取价格	Switching Controller, Voltage-mode, 1230kHz Switching Freq-Max, 7 X 7 MM, GREEN, MO-220WKK
XR77129ELBTR-F	EXAR	获取价格	40V Quad Output Digital PWM/PFM
XR77129EVB-DEMO-1	EXAR	获取价格	40V Quad Output Digital PWM/PFM
XR77129EVB-DEMO-1-KITA	EXAR	获取价格	40V Quad Output Digital PWM/PFM
XR79106	EXAR	获取价格	22V, 6A Synchronous Step-Down
XR79106EL-F	EXAR	获取价格	22V, 6A Synchronous Step-Down
XR79106EVB	EXAR	获取价格	22V, 6A Synchronous Step-Down

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