参数资料
型号: IP1827TRPBF
厂商: International Rectifier
文件页数: 5/39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:
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)
PIN ? DESCRIPTIONS ?
Highly ? Integrated ? 25A Single ‐ input ? Voltage, ?
Synchronous ? Buck ? Regulator ?
iP1827
PIN #
1 ?
2 ?
3 ?
4 ?
5 ?
6 ?
7 ?
8 ?
9 ?
10 ?
11 ?
12 ?
13 ?
14 ?
15 ?
16 ?
17 ?
PIN NAME
VIN ?
SW ?
PGND ?
PVCC ?
SS ?
LGND ?
VOSM ?
VOSP ?
RT ?
VCC ?
OCSET ?
BIASGND ?
PGD ?
EN ?
VOSO ?
COMP ?
FB ?
PIN DESCRIPTION
Input ? voltage ? for ? power ? stage. ? Bypass ? capacitors ? between ? VIN ? and ? PGND ? should ? be ? connected ? very ?
close ? to ? this ? pin ? and ? PGND ? (pin ? 3). ?
Switch ? node. ? This ? pin ? is ? connected ? to ? the ? output ? inductor. ?
Power ? ground. ? This ? pin ? should ? be ? connected ? to ? the ? system’s ? power ? ground ? plane. ? Bypass ?
capacitors ? between ? VIN ? and ? PGND ? should ? be ? connected ? very ? close ? to ? VIN ? pin ? (pin ? 1) ? and ? this ? pin. ?
Output ? of ? internal ? charge ? pump. ? Connect ? a ? 4.7uF ? to ? 10uF ? capacitor ? from ? this ? pin ? to ? local ? bias ? PGND ?
(pin ? 12), ? very ? close ? to ? the ? pins. ? External ? 5V ? may ? also ? be ? connected ? to ? this ? pin ? for ? operation ? from ? 5V ?
bias. ?
Soft ? start; ? a ? capacitor ? from ? SS ? and ? LGND ? sets ? the ? startup ? timing. ?
Signal ? ground ? for ? internal ? reference ? and ? control ? circuitry. ?
Remote ? Sense ? Amplifier ? input. ? Connect ? to ? ground ? at ? the ? load. ?
Remote ? Sense ? Amplifier ? input. ? Connect ? to ? output ? at ? the ? load. ?
Use ? an ? external ? resistor ? from ? this ? pin ? to ? GND ? to ? set ? the ? switching ? frequency, ? very ? close ? to ? the ? pin. ?
Input ? bias ? voltage ? for ? internal ? IC. ? This ? also ? powers ? the ? charge ? pump ? circuit ? in ? the ? IC. ? Connect ? a ?
10uF ? capacitor ? from ? this ? pin ? to ? local ? bias ? PGND ? (pin ? 12), ? very ? close ? to ? the ? pins. ? For ? 5V ? bias ?
operation, ? this ? pin ? should ? be ? tied ? to ? ground. ?
Current ? Limit ? setpoint. ? A ? resistor ? may ? be ? connected ? from ? this ? pin ? to ? SW ? pin ? to ? set ? thresholds ? lower ?
than ? those ? allowed ? by ? maximum ? current ? rating ? of ? the ? device. ?
This ? pin ? serves ? as ? a ? ground ? for ? the ? MOSFET ? drivers. ? It ? should ? be ? connected ? to ? the ? negative ? terminal ?
of ? the ? bias ? voltage ? at ? the ? VCC ? and/or ? PVCC ? capacitors. ?
Power ? Good ? status ? pin. ? Output ? is ? open ? collector. ? Connect ? a ? pull ? up ? resistor ? from ? this ? pin ? to ? VCC. ?
Enable ? pin ? to ? turn ? on ? and ? off ? the ? IC. ?
Remote ? Sense ? Amplifier ? Output; ? also ? forms ? an ? input ? to ? the ? power ? good ? comparator ? and ?
overvoltage ? comparator. ?
Output ? of ? error ? amplifier. ? An ? external ? resistor ? and ? capacitor ? network ? is ? typically ? connected ? from ?
this ? pin ? to ? FB ? to ? provide ? loop ? compensation. ?
Inverting ? input ? to ? the ? error ? amplifier. ? This ? pin ? is ? connected ? directly ? to ? the ? output ? of ? the ? regulator ?
or ? to ? the ? output ? of ? the ? remote ? sense ? amplifier, ? via ? resistor ? divider ? to ? set ? the ? output ? voltage ? and ?
provide ? feedback ? to ? the ? error ? amplifier. ?
?
?
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5
March ? 5, ? 2012 ??? | ??? V1.4 ?
97599
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