参数资料
型号: IR3500MTRPBF
厂商: International Rectifier
文件页数: 19/47页
文件大小: 0K
描述: IC XPHASE3 CONTROLLER 32-MLPQ
产品变化通告: (EP) Parts Discontinuation 25/May/2012
标准包装: 1
系列: XPhase3™
应用: 处理器
电流 - 电源: 6.5mA
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
产品目录页面: 1383 (CN2011-ZH PDF)
其它名称: IR3500MTRPBFDKR
IR3500
Control IC
VDAC
VDAC
Phase IC
Error
Amplifier
VSETPT
RSETPT
ISHARE
VDAC
3k
Current Sense
Amplif ier
CSIN+
CSIN-
EAOUT
IVSETPT
FB
VDRP
RFB
Amplifier
VDRP
RDRP
Phase IC
Current Sense
-
+
IIN
VO
ISHARE
VDAC
3k
Amplif ier
CSIN+
CSIN-
Remote
Sense
Amplifier
VOSEN+
VOSEN-
Figure 9 - Adaptive voltage positioning
Control IC
VDAC
VDAC
RSETPT
VSETPT
Error
Amplifier
IVSETPT
EAOUT
RFB
Remote
Sense
Amplifier
VDRP
Amplifier
-
+
FB
VDRP
IIN
VO
VOSEN+
VOSEN-
RFB1
RDRP
Rt
Figure 10 - Temperature compensation of inductor DCR
Remote Voltage Sensing
VOSEN+ and VOSEN- are used for remote sensing and connected directly to the load. The remote sense
differential amplifier with high speed, low input offset and low input bias current ensures accurate voltage sensing
and fast transient response.
Start-up Sequence
The IR3500 has a programmable soft-start function to limit the surge current during the converter start-up. A
capacitor connected between the SS/DEL and LGND pins controls soft start timing, over-current protection delay
and hiccup mode timing. A charge current of 52.5uA and discharge current of 4uA control the up slope and down
slope of the voltage at the SS/DEL pin respectively.
Page 19 of 47
May 18, 2009
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