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XRP7704：Quad-Output Digital PWM Buck Controller
The XRP7704 is a quad-output pulse-width modulated (PWM) step-down DC-DC controller with a built-in LDO for standby power and GPIOs. The device provides a complete power management solution in one IC and is fully programmable via the included I2C serial interface. Independent Digital Pulse Width Modulator (DPWM) channels regulate output voltages and provide all required protection functions such as current limiting and over-voltage protection.
Each output voltage can be programmed from 0.9V to 5.1V without the need of an external voltage divider. The wide range of the programmable DPWM switching frequency (from 300 KHz to 1.5 MHz) enables the user to optimize between efficiency and component size. Input voltage range is from 6.5V to 20V.
I2C bus interface is provided to program the IC as well as to communicate with the host for fault reporting and handling, power rail parameters monitoring, etc.
The device offers a complete solution for soft-start and soft-stop. The start-up delay and ramp of each PWM regulator can be independently controlled. The device can start up a pre-biased PWM channel without causing large negative inductor current.
The Exar Model XRP7704EVB-XCM and XRP7704EVB-XPM (“Evaluation Board”) provides designers with a simple, quick and inexpensive means of evaluating and prototyping new designs using PowerXR devices. This Evaluation Board is designed only for low volume engineering purposes; not production volumes. For production requirements commercial programmers must be used. The Evaluation Board is provided “as is and whereas” and without any warranty as to results, merchantability or purpose. Exar is not responsible for misuse of the Evaluation Board.
技术特性
Four switching buck (step-down) controllers each with internal FET drivers
6.5V to 20V input voltage range – no additional voltage rails required
Output voltages programmable from 0.9V to 5.1V
Up to 6 reconfigurable GPIO pins
Fully programmable via I2C interface
Independent Digital Pulse Width Modulator (DPWM) channels with five coefficient PID control
High Integration: elimination of external circuits and components required for compensation, parameter adjustment and interface
Programmable DPWM frequency range (300 kHz to 1.5 MHz) enables efficiency and component size optimization
Complete power monitoring and reporting
Independently controlled start-up delay and ramp for each regulator, including soft start with a pre-biased load voltage
Independently controlled soft-stop delay and ramp for each regulator with a programmable stop voltage
Over-temperature protection (OTP) and Under Voltage Lockout (UVLO); per-channel over-current protection (OCP) and over-voltage protection (OVP)
Built-in LDO (configurable to 3.3V or 5V) with over-current protection
Non-volatile memory for system configuration
Configuration development tools
数据手册S
XRP7704 Datasheet
应用指南
ANP-31, PowerXR Configuration and Programming
ANP-32, Practical Layout Guidelines for PowerXR Designs
ANP-35, XRP77XX: Extending the MOSFET Gate Drive Conductors
ANP-37, PowerXR EMI Reduction Technique Utilizing Spread-Spectrum Clock Dithering
说明书
Exar Configuration Module (XCM) Evaluation Board Manual
电路图
XRP_7704_std-app-board
XRP_7740_high-current-app-board
过程合格报告
XRP77XX Family Reliability and Qualification Report
软件
XRP7704EVB_XPM_Operators Manual_R1.0.1
Product Change Notification
十月 2010
Material Declarations
四月 2015
产品应用
Computing: Servers, Storage Systems
Consumer: Set-top box (STB), Game Systems
Industrial: ATE, DC-DC converters, Video Processing
Plasma Display Panel (PDP)
Networking and Telecommunications Equipment
规格 参数
Vin Range 6.5V – 20V
Vout Range 0.9V – 5.1V
Gate Drive Pull Up/Down - / -
静态电流(µA) 9mA
Package Type QFN40
Junction Temperature Range -40°C to 125°C
订购型号
器件型号 封装编码 状态
XRP7704ILB-F TQFN40 Active
XRP7704ILBTR-F TQFN40 Active
Other
四月 2015 XRP7704
十月 2010 XRP7740
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