参数资料
型号: IR3503MTRPBF
厂商: International Rectifier
文件页数: 9/39页
文件大小: 0K
描述: IC CTRL XPHASE VR11.0/1 32-MLPQ
标准包装: 1
系列: XPhase3™
应用: 处理器
电流 - 电源: 8mA
电源电压: 4.75 V ~ 7.5 V
工作温度: 0°C ~ 100°C
安装类型: 表面贴装
封装/外壳: 32-VFQFN 裸露焊盘
供应商设备封装: 32-MLPQ(5x5)
包装: 标准包装
其它名称: IR3503MTRPBFDKR
IR3503
SYSTEM THEORY OF OPERATION
Description:
The system consists of one control IC and scalable number of phase IC’s depending upon the number of converter
phases. The control IC communicates with the phase ICs using three digital buses, i.e., CLOCK, PHSIN, PHSOUT and
three analog buses, i.e., VDAC, EA, IIN. The digital buses are responsible for switching frequency determination and
accurate phase timing control without any external component. The analog buses are used for PWM control and
current sharing among interleaved phases. The control IC incorporates all the system functions, i.e., VID, CLOCK
signals, error amplifier, fault protections, current monitor, etc. The Phase IC implements the functions required by each
phase of the converter, i.e., the gate drivers, PWM comparator and latch, over-voltage protection, Phase disable
circuit, current sensing and sharing, etc. In addition to these functions, the control IC also implements PSI# (Power
System Indicator) functionality to improve the efficiency of the voltage regulator at light loads.
GATE DRIVE
CONTROL IC
VOLTAGE
PHSOUT
VIN
CLOCK GENERATOR
CLKOUT
CLKIN
CLK Q
PHASE IC
VCC
VCCH
PHSOUT
PHSIN
D
1
2
GATEH
CBST
VOSNS+
VID6 COMPARATOR
VID6
PHSIN
PWM
VID6
VID6
SW
SHIFT
&
VID6 LATCH
VID6
VID6
VID6
OFF
VOUT
NO. OF ACTIVE PHASES MONITOR
PSI
EAIN
VCCL
GATEL
COUT
GND
REMOTE SENSE
VID6
VID6
AMPLIFIER
VO
VDAC
BODY
VID6 VID6
BRAKING
OFF
VID6
PSI# COMPARATOR
&
PGND
PSI
VOSNS-
8 COUNT DELAY
LGND
ILL
VID6
AMPLIFIER
VID6
VDAC
EAOUT
ISHARE
SHARE ADJUST
VID6
SHIFT
PULSE
GENERATION
VID6
SHIFT
VID6
ERROR
AMPLIFIER
RCOMP
RFB1
RFB
VID6
VID6
VID6 +
+
CURRENT
SENSE
VID6
AMPLIFIER
CSIN+
CSIN-
CCS
RCS
FB
RVSETPT
CCOMP
CFB1
RDRP1
DACIN
IVSETPT
IROSC
VSETPT
IMON
CDRP
RDRP
PHSOUT
PHASE IC
VCC
VDAC
CLKIN
CLK Q
VCCH
D
VID6 COMPARATOR
VID6
VDRP
Thermal
Compensation
VDRP
PHSIN
1
2
PWM
VID6
VID6
GATEH
SW
CBST
VID6
AMP
VN
RTHRM
EAIN
&
VID6 LATCH
VID6
VID6
OFF
VCCL
IIN
VID6
GATEL
BODY
VID6
OFF
PGND
VID6VID6
BRAKING
VID6
VID6
PSI# COMPARATOR
&
PSI
PSI#
8 COUNT DELAY
ILL
VID6
AMPLIFIER
VID6
AMPLIFIER
ISHARE
SHARE ADJUST
VID6
VID6
SHIFT
PULSE
GENERATION
VID6
VID6 +
VID6
CURRENT
VID6
SENSE
VID6
SHIFT
CSIN+
CCS
RCS
SHIFT
Page 9 of 39
+
DACIN
Figure 3: System Block Diagram
CSIN-
February 12, 2010
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