-
The L4971 is a step down monolithic power switching regulator delivering 1.5A 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 0.25Ω) 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, DIP8 for standard assembly, and SO16W for SMD assembly.特徴
- PROTECTION AGAINST FEEDBACK DISCONNECTION
- INHIBIT FOR ZERO CURRENT CONSUMPTION
- SOFT START FUNCTION
- THERMAL SHUTDOWN
- ZERO LOAD CURRENT OPERATION
- VOLTAGE FEEDFORWARD
- UP TO 1.5A 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-BY PULSE AND HICCUP MODE)
- OUTPUT VOLTAGE ADJUSTABLE FROM 3.3V TO 50V
注目ビデオ
All tools & software
All resources
製品スペック (1)
| Resource title | Latest update | |||
|---|---|---|---|---|
| 19 Sep 2016 |
19 Sep 2016
|
アプリケーションノート (3)
| Resource title | Latest update | |||
|---|---|---|---|---|
| 13 Sep 2018 |
13 Sep 2018
|
|||
| 13 Sep 2018 |
13 Sep 2018
|
|||
| 13 Sep 2018 |
13 Sep 2018
|
技術ノート & 解説 (1)
| Resource title | Latest update | |||
|---|---|---|---|---|
| 20 Jan 2020 |
20 Jan 2020
|
Design Notes & Tips (2)
| Resource title | Latest update | |||
|---|---|---|---|---|
| 16 Jul 2019 |
16 Jul 2019
|
|||
| 16 Jul 2019 |
16 Jul 2019
|
パンフレット (1)
| Resource title | Latest update | |||
|---|---|---|---|---|
| 23 Mar 2020 |
23 Mar 2020
|
EDA Symbols, Footprints and 3D Models
STMicroelectronics - L4971
Speed up your design by downloading all the EDA symbols, footprints and 3D models for your application. You have access to a large number of CAD formats to fit with your design toolchain.
Symbols
Footprints
3D models
品質 & 信頼性
| 製品型番 | Marketing Status | パッケージ | グレード | RoHSコンプライアンスグレード | 材料宣誓書** |
|---|---|---|---|---|---|
| L4971 |
量産中
|
DIP-8 | インダストリアル | Ecopack2 | |
| L4971D |
量産中
|
SO-16W | インダストリアル | Ecopack1 | |
| L4971D013TR |
量産中
|
SO-16W | インダストリアル | Ecopack1 |
(**) st.comで提供している材料宣誓書は、パッケージ･ファミリ内で最も一般的に使用されているパッケージに基づく汎用ドキュメントの場合があります。そのため、特定の製品では100%正確ではない可能性があります。特定の製品情報については、セールスサポートまでお問い合わせください
サンプル & 購入
| 製品型番 | 販売代理店からオーダー | STからオーダー | 製品ステータス | ECCN (US) | ECCN (EU) | 梱包タイプ | パッケージ | 温度（℃） | Country of Origin | Budgetary Price (US$)*/Qty | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 最小 | 最大 | |||||||||||
| L4971 | 5 distributors | Free Sample Buy Direct |
量産中
|
EAR99 | NEC | Tube | DIP-8 | - | - | CHINA | 1.185 / 1k | |
| L4971D | 6 distributors | Buy Direct |
量産中
|
EAR99 | NEC | Tube | SO-16W | - | - | MALAYSIA | 1.354 / 1k | |
| L4971D013TR | 4 distributors | Free Sample Buy Direct |
量産中
|
EAR99 | NEC | Tape And Reel | SO-16W | - | - | MALAYSIA | 1.354 / 1k | |
（*）概算用の希望小売単価（US$）です。現地通貨でのお見積りについては、STのセールス･オフィスまたは販売代理店までお問い合わせください。
