首頁(yè)>R1221N25AD-TR>規(guī)格書(shū)詳情
R1221N25AD-TR中文資料理光數(shù)據(jù)手冊(cè)PDF規(guī)格書(shū)
| 廠商型號(hào) |
R1221N25AD-TR |
| 功能描述 | Step-down DC/DC Converter with Voltage Detector |
| 文件大小 |
218.97 Kbytes |
| 頁(yè)面數(shù)量 |
21 頁(yè) |
| 生產(chǎn)廠商 | RICOH electronics devices division |
| 企業(yè)簡(jiǎn)稱(chēng) |
Ricoh【理光】 |
| 中文名稱(chēng) | 理光集團(tuán)官網(wǎng) |
| 原廠標(biāo)識(shí) |  |
| 數(shù)據(jù)手冊(cè) | |
| 更新時(shí)間 | 2025-1-20 23:00:00 |
R1221N25AD-TR規(guī)格書(shū)詳情
OUTLINE
The R1221N Series are PWM step-down DC/DC Converter controllers embedded with a voltage detector, with low supply current by CMOS process.
Each step-down DC/DC converter in these ICs consists of an oscillator, a PWM control circuit, a reference voltage unit, an error amplifier, a soft-start circuit, a protection circuit, a PWM/VFM alternative circuit, a chip enable circuit, and resistors for voltage detection. A low ripple, high efficiency step-down DC/DC converter can be composed of this IC with only four external components, or a power-transistor, an inductor, a diode and a capacitor.
The output voltage of DC/DC converter can be supervised by the built-in voltage detector.
With a PWM/VFM alternative circuit, when the load current is small, the operation turns into the VFM oscillator from PWM oscillator automatically, therefore the efficiency at small load current is improved.
FEATURES
● Wide Range of Input Voltage · · · · · · · · · · · · · 2.3V to 13.2V
● Built-in Soft-start Function and two choices of Protection Function(Latch-type or Reset-type)
● Two choices of Oscillator Frequency · · · · · · · · · · 300kHz, 500kHz
● High Efficiency · · · · · · · · · · · · · · · · · · · · · · TYP. 90
● Standby Current · · · · · · · · · · · · · · · · · · · · · TYP. 0μA
● Setting Output Voltage · · · · · · · · · · · · · · · · · Stepwise setting with a step of 0.1V in the range of 1.5V to 5.0V
● High Accuracy Output Voltage · · · · · · · · · · · · · · ±2.0
● Setting Detector Threshold Voltage · · · · · · · · · · · Stepwise setting with a step of 0.1V in the range of 1.2V to 4.5V
● High Accuracy Detector Threshold Voltage· · · · · · · ±2.0
● Low Temperature-Drift Coefficient of Output Voltage · TYP. ±100ppm/°C
APPLICATIONS
● Power source for hand-held communication equipment, cameras, video instruments such as VCRs, camcorders.
● Power source for battery-powered equipment.
● Power source for household electrical appliances.
| 供應(yīng)商 | 型號(hào) | 品牌 | 批號(hào) | 封裝 | 庫(kù)存 | 備注 | 價(jià)格 |
|---|---|---|---|---|---|---|---|
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23+ |
NA/ |
3000 |
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詢價(jià) | ||
RICOH(理光) |
23+ |
SOT235 |
7350 |
現(xiàn)貨供應(yīng),當(dāng)天可交貨!免費(fèi)送樣,原廠技術(shù)支持!!! |
詢價(jià) | ||
MICROCHIP |
23+ |
SOT-5 |
12000 |
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詢價(jià) | ||
RICOH/理光 |
22+ |
SOT-23-6 |
100000 |
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詢價(jià) | ||
RICOH/理光 |
24+ |
NA |
990000 |
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詢價(jià) | ||
RICOH |
19+ |
SOT153 |
2378 |
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詢價(jià) | ||
SOT-153 |
23+ |
NA |
15659 |
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詢價(jià) | ||
RICOH |
22+23+ |
New |
34323 |
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詢價(jià) | ||
RICOH/理光 |
589220 |
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詢價(jià) | ||||
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ROHS |
13352 |
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詢價(jià) |
