參數(shù)資料
型號： XRP7740ILBTR-F
廠商： Exar Corporation
文件頁數(shù)： 11/28頁
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
標準包裝： 3,000
系列： PowerXR
拓撲： 降壓（降壓）同步（4），線性（LDO）（1）
功能： 任何功能
輸出數(shù)： 5
頻率 - 開關： 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 驅動器： 無
帶監(jiān)控器： 無
帶序列發(fā)生器： 是
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
供應商設備封裝： 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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?2012 Exar Corporation
11/28
Rev. 1.2.2
FEATURES AND BENEFITS
General DPWM Benefits:
"   Eliminate temperature and time variations associated
with passive components in:
 Output set point
 Feedback compensation
 Frequency set point
 Under voltage lock out
 Input voltage measurement
 Gate drive dead time
"   Tighter   parameter   tolerances   including   operating
frequency set point
"   Easy configuration and re-configuration for different
Vout, Iout, Cout, and Inductor selection by simply
changing internal PID coefficients. No need to change
external passives for a new output specification.
"   Higher integration: Many external circuits can be
handled by monitoring or modifying internal registers
"   Selectable   DPWM   frequency   and   Controller   Clock
Frequency
Other Benefits:
"   A single voltage is needed for regulation [no External
LDO required].
"   I
2
C interface allows:
 Communication with a System Controller or other
Power Management devices for optimized system
function
 Access to modify or read internal registers that
control or monitor:
 Output Current
 Input and Output Voltage
 Soft-Start/Soft-Stop Time
 Power Good
 Part Temperature
 Enable/Disable Outputs
 Over Current
 Over Voltage
 Temperature Faults
 Adjusting fault limits and disabling/enabling
faults
"   6 Configurable GPIO pins, (4 if I
2
C is in use). Pins can
be configured in several ways:
 Fault reporting (including OCP, OVP, Temperature,
Soft-Start in progress, Power Good)
 Allows a Logic Level interface with other non-digital
ICs or as logic inputs to other devices
 Possible to configure as traditional enable pin for
all 4 outputs
 2 GPIOs can be dedicated to the I
2
C Interface as
required by the customers design
"   Frequency and Synchronization Capability
 Selectable switching frequency between 300kHz and
1.5MHz
 Each output can be programmed to any one of 4
possible phases
 Both internal clock and DPWM clock can be
synchronized to external sources
 Master, Slave and Stand-alone Configurations
are possible
"   Internal MOSFET Drivers
 Internal FET drivers for each Channel: 3?1.8?for
XRP7740 and 5?1.8?for XRP7708
 Built-In Automatic Dead-time adjustment
 30ns Rise and Fall times
 Soft-start into a pre-biased load and Soft-stop with
programmable endpoint voltage
"   PowerArchitect" Design and Configuration Software:
 In its simplest form only VIN, VOUT, and Iout for
each channel is required.
 The software calculates configuration register
content based upon customer requirements. PID
coefficients for correct loop response (for automatic
or customized designs) can be generated and sent
to the device.
 Configurations can be saved and/or recalled
 GPIOs can be configured easily and intuitively
 Synchronization configuration can be adjusted
 Interface can be used for real-time debugging and
optimization
"   Customizing XRP7708/40 with customer parameters
 Once a configuration is finalized it can be sent to
EXAR and can reside in pre-programmed parts that
customers can order with an individual part number.
 Allows parts to be used without I
2
C interface
System Benefits:
"   Reliability is enhanced via communication with the
system controller which can obtain real time data on
an output voltage, input voltage and current.
"   System   processors    can    communicate    with    the
XRP7708/40   directly    to   obtain    data    or    make
adjustments to react to circuit conditions
"   A system process or could also be configured to log
and analyze operating history, perform diagnostics and
if required, take the supply off-line after making other
system adjustments.
"   If customer field service is a possibility for your end
product,   parameter   reporting   and   history   would
provide additional capabilities for troubleshooting or
aid in future system upgrades.
 
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