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| 型号： | IP1827TRPBF |
| 厂商： | International Rectifier |
| 文件页数： | 33/39页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 25A LGA |
| 标准包装： | 2,000 |
| 系列： | iPOWIR™ |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.6 V ~ 12 V |
| 输入电压： | 1.5 V ~ 16 V |
| PWM 型： | 电压模式 |
| 频率 - 开关： | 225kHz ~ 1.65MHz |
| 电流 - 输出： | 25A |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 17-LLGA |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 17-LGA（7.65x7.65） |
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Highly ? Integrated ? 25A Single ‐ input ? Voltage, ?
Synchronous ? Buck ? Regulator ?
iP1827
LAYOUT ? CONSIDERATIONS ?
The ? layout ? is ? very ? important ? when ? designing ? high ?
frequency ? switching ? converters. ? Layout ? will ? affect ? noise ?
pickup ? and ? can ? cause ? a ? good ? design ? to ? perform ? with ? less ?
than ? expected ? results. ?
Make ? all ? the ? connections ? for ? the ? power ? components ? in ??
the ? top ? layer ? with ? wide, ? copper ? filled ? areas ? or ? polygons. ??
In ? general, ? it ? is ? desirable ? to ? make ? proper ? use ? of ? power ?
planes ? and ? polygons ? for ? power ? distribution ? and ? heat ?
dissipation. ?
The ? inductor, ? output ? capacitors ? and ? the ? iP1827 ? should ? be ?
as ? close ? to ? each ? other ? as ? possible. ? This ? helps ? to ? reduce ? the ?
EMI ? radiated ? by ? the ? power ? traces ? due ? to ? the ? high ? switching ?
currents ? through ? them. ?
The ? input ? capacitors ? should ? be ? placed ? as ? close ? as ? possible ?
to ? the ? PGnd ? pad. ? The ? connection ? of ? the ? Vin ? pad ? to ? the ? Vin ?
power ? polygon ? should ? be ? low ? impedance, ? using ? several ?
vias ? in ? parallel. ? The ? layout ? must ? ensure ? minimum ? length ?
ground ? path ? and ? enough ? copper ? for ? input ? and ? output ?
ground ? polygon ? should ? be ? connected ? to ? BiasGnd ? through ??
a ? single ? point ? connection ? using ? a ? 0 ? ohm ? resistor, ? at ? a ?
location ? away ? from ? noise ? sources. ? The ? PGnd ? pad ? (Pin ? 3) ?
should ? be ? connected ? to ? system ? power ? Ground. ?
In ? order ? to ? minimize ? coupling ? switching ? noise ? into ? other ?
layers, ? the ? area ? of ? the ? switch ? node ? copper ? should ? be ? kept ?
small. ? It ? is ? also ? advisable ? to ? keep ? the ? switch ? node ? copper ?
localized ? to ? the ? top ? layer. ?
The ? critical ? bypass ? components ? such ? as ? capacitors ? for ??
Vcc ? should ? be ? close ? to ? their ? respective ? pins. ? It ? is ? important ?
to ? place ? the ? feedback ? components ? including ? feedback ?
resistors ? and ? compensation ? components ? close ? to ? Fb ? and ?
Comp ? pins. ??
A ? pair ? of ? sense ? traces ? running ? very ? close ? to ? each ? other ? and ?
away ? from ? any ? noise ? sources ? should ? be ? used ? to ? implement ?
true ? differential ? remote ? sensing ? of ? the ? voltage. ?
If ? remote ? sense ? is ? not ? used, ? the ? output ? voltage ? sense ? trace ?
used ? for ? feedback ? should ? be ? tapped ? from ? a ? low ? impedance ?
point ? such ? as ? directly ? from ? an ? output ? capacitor. ?
capacitors ? with ? a ? direct ? connection. ?
The ? iPOWiR ? package ? is ? a ? thermally ? enhanced ? package. ?
The ? iP1827 ? has ? a ? local ? power ? ground ? pad ? called ? Bias ? Gnd ?
(pin ? 12) ? for ? bypassing ? Vcc ? or ? PVcc ? supplies. ? The ? analog ? or ?
signal ? ground, ? LGnd, ? is ? used ? as ? a ? separate ? control ? circuit ?
ground ? to ? which ? all ? signals ? are ? referenced. ? The ? analog ??
Enough ? copper ?
& ? minimum ? length ?
ground ? path ? between ?
Input ? and ? Output
All ? bypass ? caps ?
(Marked ? in ? Cyan) ? should ? be ?
placed ? as ? close ? as ? possible
? to ? their ? connecting ? pins
BiasGnd ?
Single ? Point ? Connection ?
of ? AGND ? and ? BiasGnd ?
Resistors ? Rt ? (marked ? in ? Brown) ?
should ? be ? placed ? as ? close ? as ?
possible ? to ? their ? pins
Compensation ? parts ?
Based ? on ? thermal ? performance ? it ? is ? recommended ? to ??
use ? at ? least ? a ? 6 ‐ layers ? PCB. ? Figures ? 25A ‐ f ? illustrate ? the ?
implementation ? of ? the ? layout ? guidelines ? outlined ? above, ?
on ? the ? IRDC1827 ? 6 ? layer ? demoboard.
Optional ? on ? board ??
load ? transient ? circuit: ?
Not ? Critical ?
Switch ? node ? should ?
have ? small ? area ? and ?
should ? be ? localized ?
to ? Top ? layer ?
(Marked ? in ? dark ? blue) ?
should ? be ? placed ? as ? close ? as ?
possible ? to ? the ? Comp ? pin ?
Switch ? node ? should ? have ? small ? area ? and ?
should ? be ? localized ? to ? Top ? layer ??
?
?
Figure ? 35a: ? IRDC1827 ? demoboard ? layout ? considerations ? – ? Top ? Layer
33
March ? 5, ? 2012 ??? | ??? V1.4 ?
97599
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相关代理商/技术参数 |
参数描述 |
|---|---|
| IP1827TRPBF-CUT TAPE | 制造商:IR 功能描述:IP1827 Series Integrated 25 A Single-input Voltage Synchronous Buck Regulator |
| IP1837 | 制造商:IRF 制造商全称:International Rectifier 功能描述:Highly Integrated 35A Singlea??input Voltage, Synchronous Buck Regulator |
| IP1837PBF | 功能描述:电源管理IC开发工具 35A 1.5V to 16V REG iPOWIR 1.5MHz 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 |
| IP1837TRPBF | 功能描述:开关变换器、稳压器与控制器 35A iPOWIR 1.5MHz Pvin 1.5V to 16V REG RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| IP1842 | 制造商:SEME-LAB 制造商全称:Seme LAB 功能描述:CURRENT MODE REGULATING PULSE WIDTH MODULATORS |
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