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R1234D281B中文資料理光數(shù)據(jù)手冊PDF規(guī)格書
R1234D281B規(guī)格書詳情
OUTLINE
The R1234D Series are CMOS-based PWM step-down DC/DC Converters with synchronous rectifier, low supply current.
Each of these ICs consists of an oscillator, a PWM control circuit, a reference voltage unit, an error amplifier, a soft-start circuit, protection circuits, a protection against miss operation under low voltage (UVLO), PWM/VFM alternative circuit, a chip enable circuit, and a driver transistor. A low ripple, high efficiency step-down DC/DC converter can be easily composed of this IC with only a few kinds of external components, or an inductor and capacitors. (As for R1234D001C/D types, divider resistors are also necessary.) In terms of Output Voltage, it is fixed internally in the R1234Dxx1A/B types. While in the R1234D001C/D types, Output Voltage is adjustable with external divider resistors.
FEATURES
? Supply Current ..................................................Typ. 230μA (R1234Dxx1A/C)
Typ. 250μA (R1234Dxx1B/D)
? Standby Current ................................................Typ. 0μA
? Input Voltage Range ........................................ 2.4V to 5.5V (ABSOLUTE MAXIMUM : 6.5V)
? Output Voltage Range.......................................2.2V to 3.3V (R1234Dxx1A/B)
0.8V to VIN (R1234Dxx1C/D)
? Output Voltage Accuracy...................................±2.0 (R1234DxxA/B)
? Oscillator Frequency.........................................Typ. 500kHz (R1234Dxx1A/C)
Typ. 800kHz (R1234Dxx1B/D)
? Built-in Driver ON Resistance ...........................Pch 0.4? ,Nch 0.6? (VIN=3V)
? Control mode switch .........................................MODE pin=”L”: PWN
MODE pin=”H”: VFM
? Efficiency...........................................................Typ. 90
? Package ............................................................SON-8
? Built-in Soft-start Function.................................Typ. 1.5ms
? Latch-type Protection Function .........................Typ. 1.5ms
? Built-in Current Limit Circuit
APPLICATIONS
? Power source for portable equipment.
產(chǎn)品屬性
- 型號：
R1234D281B
- 制造商：
RICOH
- 制造商全稱：
RICOH electronics devices division
- 功能描述：
PWM/VFM Step-Down DC/DC CONVERTER with Synchronous Rectifier
| 供應(yīng)商 | 型號 | 品牌 | 批號 | 封裝 | 庫存 | 備注 | 價格 |
|---|---|---|---|---|---|---|---|
RICOH |
23+ |
TSSOP8 |
12800 |
##公司主營品牌長期供應(yīng)100%原裝現(xiàn)貨可含稅提供技術(shù) |
詢價 | ||
RICOH |
TSSOP8 |
2 |
一級代理,專注軍工、汽車、醫(yī)療、工業(yè)、新能源、電力 |
詢價 | |||
24+ |
5000 |
公司存貨 |
詢價 | ||||
KODENSHI正 |
SMD |
85623 |
只做原裝貨值得信賴 |
詢價 | |||
KODENSHI |
21+ |
SMD |
9866 |
詢價 | |||
RICOH |
589220 |
16余年資質(zhì) 絕對原盒原盤 更多數(shù)量 |
詢價 | ||||
RICOH |
TSSOP8 |
899933 |
集團化配單-有更多數(shù)量-免費送樣-原包裝正品現(xiàn)貨-正規(guī) |
詢價 | |||
KODENSHI |
21+ |
SMD |
5000 |
原裝現(xiàn)貨/假一賠十/支持第三方檢驗 |
詢價 | ||
RICOH |
23+ |
TSSOP8 |
10000 |
原裝正品現(xiàn)貨 |
詢價 | ||
AUK |
24+ |
SMD |
9657 |
絕對原廠原裝,長期優(yōu)勢可定貨 |
詢價 |
