L4978數(shù)據(jù)手冊(cè)集成電路（IC）的穩(wěn)壓器-DC-DC開(kāi)關(guān)穩(wěn)壓器規(guī)格書(shū)PDF
| 廠商型號(hào) |
L4978 |
| 參數(shù)屬性 | L4978 封裝/外殼為8-DIP（0.300"，7.62mm）；包裝為卷帶（TR）剪切帶（CT）Digi-Reel? 得捷定制卷帶；類(lèi)別為集成電路（IC）的穩(wěn)壓器-DC-DC開(kāi)關(guān)穩(wěn)壓器；產(chǎn)品描述：IC REG BUCK ADJUSTABLE 2A 8DIP |
| 功能描述 | 降壓 |
| 封裝外殼 | 8-DIP（0.300"，7.62mm） |
| 制造商 | ST STMicroelectronics |
| 中文名稱(chēng) | 意法半導(dǎo)體 意法半導(dǎo)體集團(tuán) |
| 數(shù)據(jù)手冊(cè) | |
| 更新時(shí)間 | 2025-8-18 17:18:00 |
| 人工找貨 | L4978價(jià)格和庫(kù)存，歡迎聯(lián)系客服免費(fèi)人工找貨 |
L4978規(guī)格書(shū)詳情
描述 Description
The L4978 is a step down monolithic power switching regulator delivering 2A at a voltage between 3.3V and 50V (selected by a simple external divider). Realized in BCD mixed technology, the device uses an internal power D-MOS transistor (with a typical Rdson of 0.25?) to obtain very high efficency and high switching speed.
A switching frequency up to 300KHz is achievable (the maximum power dissipation of the packages must be observed). A wide input voltage range between 8V to 55V and output voltages regulated from 3.3V to 50V cover the majority of today’s applications. Features of this new generations of DC-DC converter include pulse-by-pulse current limit, hiccup mode for short circuit protection, voltage feedforward regulation, soft-start, protection against feedback loop disconnection, inhibit for zero current consumption and thermal shutdown.
The device is available in plastic dual in line, DIP-8 for standard assembly, and SO16W for SMD assembly.
特性 Features
? PROTECTION AGAINST FEEDBACK DISCONNECTION
? INHIBIT FOR ZERO CURRENT CONSUMPTION
? SOFT START FUNCTION
? THERMAL SHUTDOWN
? ZERO LOAD CURRENT OPERATION
? VOLTAGE FEEDFORWARD
? UP TO 2A STEP DOWN CONVERTER
? PRECISE 3.3V (±1%) INTERNAL REFERENCE VOLTAGE
? OPERATING INPUT VOLTAGE FROM 8V TO 55V
? SWITCHING FREQUENCY ADJUSTABLE UP TO 300KHz
? INTERNAL CURRENT LIMITING (PULSE-BYPULSE AND HICCUP MODE)
? OUTPUT VOLTAGE ADJUSTABLE FROM 3.3V TO 50V
簡(jiǎn)介
L4978屬于集成電路（IC）的穩(wěn)壓器-DC-DC開(kāi)關(guān)穩(wěn)壓器。由制造生產(chǎn)的L4978穩(wěn)壓器 - DC-DC 開(kāi)關(guān)穩(wěn)壓器DC-DC 開(kāi)關(guān)穩(wěn)壓器 PMIC（電源管理集成電路）產(chǎn)品族中的產(chǎn)品是元器件級(jí)設(shè)備，用于需要穩(wěn)定 DC 輸入電壓和/或?qū)⑵滢D(zhuǎn)換為不同幅度的輸出電壓的應(yīng)用。這些器件與稱(chēng)為“控制器”P(pán)MIC 的類(lèi)似產(chǎn)品的區(qū)別在于集成了主開(kāi)關(guān)元件，設(shè)備提供的電力會(huì)通過(guò)該元件。
技術(shù)參數(shù)
更多- 制造商編號(hào)
：L4978
- 生產(chǎn)廠家
：ST
- Marketing Status
：Active
- Package
：DIP-8
- Grade
：Industrial
- Input Voltage_min(V)
：8
- Input Voltage_max(V)
：55
- Regulated Output Voltage_min(V)
：3.3
- Regulated Output Voltage_max(V)
：50
- Output Current-Max_nom(A)
：2
- Synchronous rectification
：No
- Quiescent current_typ(mA)
：2.7
- Regulator Switching frequency_typ(kHz)
：300
- Inhibit Pin
：true
- Soft-start
：Yes
- Oscillator Switching frequency_min(Internal)(kHz)
：100
- Oscillator Switching frequency_max(Internal)(kHz)
：300
| 供應(yīng)商 | 型號(hào) | 品牌 | 批號(hào) | 封裝 | 庫(kù)存 | 備注 | 價(jià)格 |
|---|---|---|---|---|---|---|---|
ST/意法 |
2023+ |
DIP8-CN |
6895 |
原廠全新正品旗艦店優(yōu)勢(shì)現(xiàn)貨 |
詢(xún)價(jià) | ||
ST |
24+ |
DIP-8 |
6980 |
原裝現(xiàn)貨,可開(kāi)13%稅票 |
詢(xún)價(jià) | ||
ST/意法半導(dǎo)體 |
21+ |
DIP-8 |
10000 |
全新原裝現(xiàn)貨 |
詢(xún)價(jià) | ||
ST |
25+ |
DIP8 |
518000 |
明嘉萊只做原裝正品現(xiàn)貨 |
詢(xún)價(jià) | ||
ST/意法 |
21+ |
DIP8 |
5000 |
百域芯優(yōu)勢(shì) 實(shí)單必成 可開(kāi)13點(diǎn)增值稅發(fā)票 |
詢(xún)價(jià) | ||
STM |
24+ |
原廠原封 |
900 |
只做原裝 |
詢(xún)價(jià) | ||
STMicroelectronics |
24+ |
8-DIP |
66800 |
原廠授權(quán)一級(jí)代理,專(zhuān)注汽車(chē)、醫(yī)療、工業(yè)、新能源！ |
詢(xún)價(jià) | ||
ST |
24+ |
DIP8 |
8000 |
原裝，正品 |
詢(xún)價(jià) | ||
ST/意法半導(dǎo)體 |
24+ |
DIP-8 |
6000 |
全新原裝深圳倉(cāng)庫(kù)現(xiàn)貨有單必成 |
詢(xún)價(jià) | ||
ST/意法 |
25+ |
DIP8 |
996880 |
只做原裝,歡迎來(lái)電資詢(xún) |
詢(xún)價(jià) |
