L7987 - 61 V 3 A asynchronous step-down switching regulator with adjustable current limitation - STマイクロエレクトロニクス

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製品概要

概要

The L7987 device is a step-down monolithic switching regulator able to deliver up to 3 A DC. The output voltage adjustability ranges from 0.8 V to V_IN. The wide input voltage range and the 100% duty cycle capability meet the fail safe specifications for industrial systems. The embedded switchover feature on the V_BIASpin maximizes the efficiency at light load. The adjustable current limitation, designed to select the inductor RMS current accordingly with the nominal output current, and the high switching frequency capability make the size of the application compact. Pulse-by-pulse current sensing with digital frequency foldback implements an effective constant current protection over the different application conditions. The peak current foldback decreases the stress of the power components in heavy short-circuit condition. The PGOOD open collector output can also implement output voltage sequencing during the power-up phase. Multiple devices can be synchronized sharing the SYNCH pin to prevent beating noise in low noise applications like sensors with A/D conversion.

特徴
3 A DC output current

4.5 V to 61 V operating input voltage

R_DS,ON= 250 mΩ typ.

Adjustable f_SW(250 kHz - 1.5 MHz)

Low IQ-SHD (11 μA typ. from V_IN)

Low IQ (1 mA typ. - V_IN24 V - V_OUT3.3 V)

Output voltage adjustable from 0.8 V to V_IN

同期化

Adjustable soft-start time
Adjustable current limitation

Low dropout operation (12 μs max.)

V_BIASimproves efficiency at light load

PGOOD open collector output

Output voltage sequencing

Digital frequency foldback in short-circuit

Peak current foldback in short-circuit

Auto-recovery thermal shutdown
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	タイトル	バージョン	更新日

SPICE models (1)

	タイトル	バージョン	更新日
ZIP	L7987 Pspice model	1.0	02 Nov 2017	02 Nov 2017 L7987 Pspice model 1.0

SIMPLIS models (1)

	タイトル	バージョン	更新日
ZIP	L7987-SIMPLIS-examples-schematics	2024.06	12 Jun 2024	12 Jun 2024 L7987-SIMPLIS-examples-schematics 2024.06

品質 & 信頼性

製品型番	マーケティング･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	Longevity Commitment	Longevity Starting Date	材料宣誓書**
L7987	量産中	HTSSOP16	インダストリアル	Ecopack2	10	2023-06-06T00:00:00.000+02:00	PDF XML
L7987TR	量産中	HTSSOP16	インダストリアル	Ecopack2	10	2023-06-06T00:00:00.000+02:00	PDF XML

L7987

Package:

HTSSOP16

Material Declaration**:

L7987TR

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HTSSOP16

Material Declaration**:

(**) 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

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販売代理店在庫 L7987TR

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販売代理店在庫 L7987

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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

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L7987TR 量産中

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L7987 量産中

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