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RP500X

更新时间： 2024-09-24 03:36:11
品牌 Logo 应用领域
理光 - RICOH 转换器
页数 文件大小 规格书
16页 645K
描述
The RP500X Series are CMOS-based step-down DC/DC Converters with synchronous rectifier.

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RP500x SERIES  
NO.EA-155-070919  
OUTLINE  
The RP500X Series are CMOS-based step-down DC/DC Converters with synchronous rectifier.  
Each of these ICs consists of an oscillator, a switching control circuit, a reference voltage unit, an error  
amplifier, a soft-start circuit, protection circuits, UVLO circuit, switching transistors, and so on. A low ripple, high  
efficiency step-down DC/DC converter can be easily composed of this IC with only an inductor and capacitors. In  
terms of the output voltage, since the feedback resistances are built-in, the voltage is fixed internally.  
50mV(custom-made) step output can be set by laser-trim and 1.5% or 24mV tolerance depending on the output  
voltage is guaranteed.  
Mode alternative circuit works automatically for improving the efficiency. Considering fixed noise  
frequency, PWM fixed control type is also available. As protection circuits, the current limit circuit which limits  
peak current of Lx at each clock cycle, and the latch type protection circuit which works if the term of the  
over-current condition keeps on a certain time exist. The latch-type protection circuit works to latch an internal  
driver with keeping it disable. To release the condition of the protection, after disabling this IC with a chip enable  
circuit, enable it again, or restart this IC with power-on or make the supply voltage at UVLO detector threshold  
level or lower than UVLO.  
Since packages are PLP1820-6, SOT23-6, WLCSP-6 (0.16φ), high density mounting on boards is possible.  
FEATURES  
ꢀOutput Current....................................... Min. 400mA  
ꢀ Input Voltage Range............................. 2.55V to 5.50V  
ꢀOutput Voltage...................................... 1.1V to 3.3V  
ꢀHigh Accuracy Output Voltage ............. ±1.5% (Vout≥1.6V)  
±24mV (Vout<1.6V)  
ꢀOscillator Frequency.............................. Typ. 1.2MHz/3.3MHz(We changed the product name of 3.3MHz  
device.)  
ꢀBuilt-in Soft start Function..................... Typ.0.1ms  
ꢀBuilt-in Lx Peak Current Limit................ Typ. 900mA  
ꢀBuilt-in Latch type Protection................. Typ.1.5ms  
ꢀBuilt-in UVLO Function.......................... Typ. 2.2V  
ꢀTwo choices of Switching Mode............. Automatic PWM/PFM mode change / PWM fixed  
ꢀPackages................................................ PLP1820-6, SOT23-6W, WLCSP-6 (0.16φ)  
APPLICATIONS  
ꢀPower source for portable equipment such as cellular, PDA, DSC, Notebook PC  
ꢀPower source for HDD  
ꢀPower source for Li-ion battery-used equipment  
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RP500Z131A-E2-F RICOH

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 		Switching Regulator, Current-mode, 0.9A, 1440kHz Switching Freq-Max, CMOS, PBGA6, HALOGEN
RP500Z132A-E2 RICOH

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 		Switching Regulator, 0.9A, 1440kHz Switching Freq-Max, CMOS, PBGA6, WLCSP-6
RP500Z132A-E2-F RICOH

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 		Switching Regulator, Current-mode, 0.9A, 1440kHz Switching Freq-Max, CMOS, PBGA6, HALOGEN

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