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R1221N25AD中文資料理光數(shù)據(jù)手冊PDF規(guī)格書
R1221N25AD規(guī)格書詳情
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 | 庫存 | 備注 | 價(jià)格 |
|---|---|---|---|---|---|---|---|
RICOH/理光 |
01+ |
SOT-153 |
3000 |
一級(jí)代理,專注軍工、汽車、醫(yī)療、工業(yè)、新能源、電力 |
詢價(jià) | ||
MICROCHIP |
23+ |
SOT-5 |
12000 |
全新原裝假一賠十 |
詢價(jià) | ||
RICOH/理光 |
22+ |
SOT-23-6 |
100000 |
代理渠道/只做原裝/可含稅 |
詢價(jià) | ||
RICOH/理光 |
24+ |
NA |
990000 |
明嘉萊只做原裝正品現(xiàn)貨 |
詢價(jià) | ||
RICOH/理光 |
23+ |
SOT153 |
8500 |
只做原裝正品假一賠十為客戶做到零風(fēng)險(xiǎn)!! |
詢價(jià) | ||
RICOH |
23+ |
SOT23-6 |
7750 |
全新原裝優(yōu)勢 |
詢價(jià) | ||
RICOH |
19+ |
SOT153 |
2378 |
原裝 |
詢價(jià) | ||
RICOH |
ROHS |
13352 |
一級(jí)代理 原裝正品假一罰十價(jià)格優(yōu)勢長期供貨 |
詢價(jià) | |||
SOT-153 |
23+ |
NA |
15659 |
振宏微專業(yè)只做正品,假一罰百! |
詢價(jià) | ||
RICOH |
22+23+ |
New |
34323 |
絕對原裝正品現(xiàn)貨,全新深圳原裝進(jìn)口現(xiàn)貨 |
詢價(jià) |
