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The L6983 is an easy to use synchronous monolithic step-down regulator capable of delivering up to 3 A DC to the load. The wide input voltage range makes the device suitable for a broad range of applications. The L6983 is based on a peak current mode architecture and is packaged in a QFN16 3x3 with internal compensation thus minimizing design complexity and size.
The L6983 is available both in low consumption mode (LCM) and low noise mode (LNM) versions. LCM maximizes the efficiency at light-load with controlled output voltage ripple so the device is suitable for battery-powered applications. LNM makes the switching frequency constant and minimizes the output voltage ripple for light load operations, meeting the specification for low noise sensitive applications. The L6983 allows the switching frequency to be selected in the 200 Hz - 2.2 MHz range with optional spread spectrum for improved EMC.
The EN pin provides enable/disable function. The typical shutdown current is 2 µA when disabled. As soon as the EN pin is pulled up, the device is enabled and the internal 1.3 ms soft-start takes place. The L6983 features Power Good open collector that monitors the FB voltage. Pulse-by-pulse current sensing on both power elements implements an effective constant current protection and thermal shutdown prevents thermal run-away.主な特徴
- 3.5 V to 38 V operating input voltage
- Output voltage from 0.85 V to VIN
- 3.3 V and 5 V fixed output voltage versions
- 3 A DC output current
- 17 μA operating quiescent current
- Internal compensation network
- Two different versions: LCM for high efficiency at light loads and LNM for noise sensitive applications
- 2 μA shutdown current
- Internal soft-start
- 有効にする
- Overvoltage protection
- Output voltage sequencing
- Thermal protection
- 200 kHz to 2.2 MHz programmable switching frequency. Stable with low ESR capacitor
- Optional spread spectrum for improved EMC
- Power Good
- Synchronization to external clock for LNM devices
- QFN16 package
サンプル & 購入
| 製品型番 | パッケージ | 梱包タイプ | 製品ステータス | 概算価格（USS） | 数量 | ECCN (US) | Country of Origin | 販売代理店からオーダー | STからオーダー |
|---|---|---|---|---|---|---|---|---|---|
| L6983C33QTR | QFPN 3X3X0.80 16L PITCH 0.50 | Tape And Reel | アクティブ | 1.5 | 1000 | EAR99 | - | 販売代理店に在庫がない場合は、STのセールスオフィスまでお問い合わせください | |
| L6983CQTR | QFPN 3X3X0.80 16L PITCH 0.50 | Tape And Reel | アクティブ | 1.5 | 1000 | EAR99 | - | 販売代理店に在庫がない場合は、STのセールスオフィスまでお問い合わせください | |
| L6983N33QTR | QFPN 3X3X0.80 16L PITCH 0.50 | Tape And Reel | アクティブ | 1.5 | 1000 | EAR99 | - | 販売代理店に在庫がない場合は、STのセールスオフィスまでお問い合わせください | |
| L6983N50QTR | QFPN 3X3X0.80 16L PITCH 0.50 | Tape And Reel | アクティブ | 1.5 | 1000 | EAR99 | - | 販売代理店に在庫がない場合は、STのセールスオフィスまでお問い合わせください | |
| L6983C50QTR | QFPN 3X3X0.80 16L PITCH 0.50 | Tape And Reel | アクティブ | 1.5 | 1000 | EAR99 | - | 販売代理店に在庫がない場合は、STのセールスオフィスまでお問い合わせください | |
| L6983NQTR | QFPN 3X3X0.80 16L PITCH 0.50 | Tape And Reel | アクティブ | 1.5 | 1000 | EAR99 | - | 販売代理店に在庫がない場合は、STのセールスオフィスまでお問い合わせください |
L6983C33QTR
パッケージ
QFPN 3X3X0.80 16L PITCH 0.50梱包タイプ
Tape And ReelUnit Price (US$)
1.5*L6983CQTR
パッケージ
QFPN 3X3X0.80 16L PITCH 0.50梱包タイプ
Tape And ReelUnit Price (US$)
1.5*L6983N33QTR
パッケージ
QFPN 3X3X0.80 16L PITCH 0.50梱包タイプ
Tape And ReelUnit Price (US$)
1.5*L6983N50QTR
パッケージ
QFPN 3X3X0.80 16L PITCH 0.50梱包タイプ
Tape And ReelUnit Price (US$)
1.5*L6983C50QTR
パッケージ
QFPN 3X3X0.80 16L PITCH 0.50梱包タイプ
Tape And ReelUnit Price (US$)
1.5*L6983NQTR
パッケージ
QFPN 3X3X0.80 16L PITCH 0.50梱包タイプ
Tape And ReelUnit Price (US$)
1.5*(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors
ビデオ
評価ツール
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写真 品名 製造元 概要 
STEVAL-ISA208V1 ST 38 V, 3 A synchronous step-down switching regulator evaluation board based on the L6983CQTR 製品型番38 V, 3 A synchronous step-down switching regulator evaluation board based on the L6983CQTR
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| 製品型番 | 製品ステータス | パッケージ | グレード | RoHSコンプライアンスグレード | Material Declaration** |
|---|---|---|---|---|---|
| L6983C33QTR | アクティブ | QFPN 3X3X0.80 16L PITCH 0.50 | インダストリアル | Ecopack2 | |
| L6983C50QTR | アクティブ | QFPN 3X3X0.80 16L PITCH 0.50 | インダストリアル | Ecopack2 | |
| L6983CQTR | アクティブ | QFPN 3X3X0.80 16L PITCH 0.50 | インダストリアル | Ecopack2 | |
| L6983N33QTR | アクティブ | QFPN 3X3X0.80 16L PITCH 0.50 | インダストリアル | Ecopack2 | |
| L6983N50QTR | アクティブ | QFPN 3X3X0.80 16L PITCH 0.50 | インダストリアル | Ecopack2 | |
| L6983NQTR | アクティブ | QFPN 3X3X0.80 16L PITCH 0.50 | インダストリアル | Ecopack2 | |
L6983C33QTR
Package:
QFPN 3X3X0.80 16L PITCH 0.50Material Declaration**:
L6983C50QTR
Package:
QFPN 3X3X0.80 16L PITCH 0.50Material Declaration**:
L6983CQTR
Package:
QFPN 3X3X0.80 16L PITCH 0.50Material Declaration**:
L6983N33QTR
Package:
QFPN 3X3X0.80 16L PITCH 0.50Material Declaration**:
L6983N50QTR
Package:
QFPN 3X3X0.80 16L PITCH 0.50Material Declaration**:
L6983NQTR
Package:
QFPN 3X3X0.80 16L PITCH 0.50Material Declaration**:
(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.
