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April 2012
Rev. 1.2.2
Exar Corporation
www.exar.com
48720 Kato Road, Fremont CA 94538, USA
Tel. +1 510 668-7000 Fax. +1 510 668-7001
GENERAL DESCRIPTION
The XRP7708 and XRP7740 are quad-output
pulse-width modulated (PWM) step-down DC-
DC controllers with a built-in LDO for standby
power and GPIOs. The devices provide a
complete power management solution in one
IC and are fully programmable via an I
2
C
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.
An I
2
C 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.
APPLICATIONS
" Multi Channel Programmable
Power Supplies
" Audio-Video Equipment
" Industrial & Telecom Equipment
" Processors & DSPs Based Equipment
FEATURES
" 4 Channel Step Down Controller
3ohm/1.8ohm driver XRP7740
5ohm/1.8ohm driver XRP7708
Programmable Output Voltage 0.9V-5.1V
Programmable 1.5MHz DPWM Frequency
" 6.5V-20V Single Input Voltage Range
" Up to 6 Reconfigurable GPIO Pins
" Fully Programmable via I2C Interface
" Independent Digital Pulse Width
Modulator (DPWM) channels
" Complete Monitoring and Reporting
" Complete Power Up/Down Sequencing
" Full On Board Protection
OTP, UVLO, OCP and OVP
" Built-in 3.3V/5V LDO
" PowerArchitect" Design Software
" Green/Halogen Free 40-pin TQFN
TYPICAL APPLICATION DIAGRAM
Fig. 1: XRP7708 or XRP7740 Application Diagram
XRP7708
XRP7740
Exposed Pad: AGND
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相关PDF资料
XRP7740ILBTR-F
IC REG 5OUT BCK/LINEAR 40TQFN
ZDS1009TA
IC CURRENT MIRROR SOT223-8
ZXCT1008FTA
IC CURRENT MONITOR 1% SOT23-3
ZXCT1009T8TA
IC CURRENT MONITOR 1% SM8
ZXCT1010E5TA
IC CURRENT MONITOR 1% SOT-23-5
ZXCT1011E5TA
IC CURRENT MONITOR 1% SOT23-5
ZXCT1012DAATA
IC CURRENT MONITOR 2.5% 5TDFN
ZXCT1020E5TA
IC CURRENT MONITOR 1% SOT23-5
相关代理商/技术参数
XRP7740ILB-AAAA-F
制造商:EXAR 制造商全称:EXAR 功能描述:Quad-Output Digital PWM Buck Controller Supporting high current loads
XRP7740ILB-F
功能描述:软开关 PWM 控制器 4Ch Digital Pwr Cntr w/LDO prog. thru I2C
RoHS:否 制造商:Fairchild Semiconductor 输出端数量: 输出电流: 开关频率: 工作电源电压:30 V 电源电流: 最大工作温度:+ 105 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Reel
XRP7740ILBTR-AAAA-F
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XRP77XXEVB-XCM
功能描述:EVAL BOARD W/USB-I2C FOR XRP7704 RoHS:是 类别:编程器，开发系统 >> 评估板 - DC/DC 与 AC/DC（离线）SMPS 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:True Shutdown™ 主要目的:DC/DC，步升 输出及类型:1，非隔离 功率 - 输出:- 输出电压:- 电流 - 输出:1A 输入电压:2.5 V ~ 5.5 V 稳压器拓扑结构:升压 频率 - 开关:3MHz 板类型:完全填充 已供物品:板 已用 IC / 零件:MAX8969
XRP77XXEVB-XPM
功能描述:电源管理IC开发工具 XRP77XXEVB-XPM RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V
XRP9710EVB
制造商:Exar Corporation 功能描述:Evaluation Board for the XRP9710 Series Dual 6 A Programmable Power Module 制造商:Exar Corporation 功能描述:XRP9710 eval
XRP9710EVB-DEMO-1
功能描述:XRP9710 - DC/DC, Step Down 2, Non-Isolated Outputs Evaluation Board 制造商:exar corporation 系列:- 零件状态:有效 主要用途:DC/DC，步降 输出和类型:2，非隔离 功率 - 输出:- 电压 - 输出:1.8V，2.5V 电流 - 输出:6A，6A 电压 - 输入:5.5 V ~ 22 V 稳压器拓扑:降压 频率 - 开关:- 板类型:完全填充 所含物品:板 使用的 IC/零件:XRP9710 标准包装:1