參數(shù)資料
型號(hào): XRP7740ILBTR-F
廠商: Exar Corporation
文件頁(yè)數(shù): 1/28頁(yè)
文件大?。?/td> 1610K
描述: IC REG 5OUT BCK/LINEAR 40TQFN
產(chǎn)品變化通告: Packing Change 15/Oct/2010
標(biāo)準(zhǔn)包裝: 3,000
系列: PowerXR
拓?fù)洌?/td> 降壓(降壓)同步(4),線性(LDO)(1)
功能: 任何功能
輸出數(shù): 5
頻率 - 開(kāi)關(guān): 1.5MHz
電壓/電流 - 輸出 1: 控制器
電壓/電流 - 輸出 2: 控制器
電壓/電流 - 輸出 3: 控制器
帶 LED 驅(qū)動(dòng)器: 無(wú)
帶監(jiān)控器: 無(wú)
帶序列發(fā)生器:
電源電壓: 6.5 V ~ 20 V
工作溫度: -40°C ~ 125°C
安裝類型: 表面貼裝
封裝/外殼: 40-WFQFN 裸露焊盤(pán)
供應(yīng)商設(shè)備封裝: 40-TQFN(6x6)
包裝: 帶卷 (TR)
配用: 1016-1352-ND - EVAL BOARD FOR XRP7740
1016-1344-ND - IN-SOCKET PROG BRD VIA USB/GUI
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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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