L3751

量産中
Design Win Education
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Wide 6 V to 75 V input voltage synchronous buck controller

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製品概要

概要

The 6 V to 75 V wide input voltage range L3751 synchronous buck controller features extreme voltage conversion ratio over switching frequency range (100 kHz - 1 MHz) thanks to 40 ns minimum conduction time.

The diode emulation (DEM) implements pulse skipping mode that maximizes the efficiency at light-load giving controlled output voltage ripple. The forced PWM (FPWM) over the load range makes the switching frequency constant and minimizes the output voltage ripple.

The Power Good open collector output validates the regulated output voltage for monitoring and it is useful to implement output voltage sequencing for digital ICs during the power-up phase.

An embedded gate driver minimizes the number of external components and it is designed for standard VTH MOSFET.

Embedded protections–output overcurrent, input voltage UVLO, internal voltage monitoring, thermal shutdown - feature controlled and safe operation for critical environments in telecom, networking and industrial applications.

The device is available in a QFN 20 leads 3.5 x 4.5 mm package with wettable flanks.

  • 特徴

    • Wide 6 V to 75 V input voltage range
    • Adjustable output voltage from 0.8 V to 60 V
    • 100 kHz - 1 MHz switching frequency range
    • 40 ns minimum on-time for extreme duty ratio
    • Low dropout operation during line transient
    • Adjustable soft-start or input voltage tracking
    • Pulse skipping or forced PWM operation at light load
    • 同期化
    • Adjustable precision enable
    • Power Good open collector output validates VOUT
    • 7.5 V gate drivers for standard VTH MOSFETs
    • Constant current protection with hiccup mode
    • Precision or lossless programmable current sensing
    • Improved line transient response
    • Input voltage undervoltage lockout
    • Internal voltage monitoring
    • Thermal protection
    • Operating junction temperature range: -40 °C to 150 °C
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eDesignSuite

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Thermal-electrical Simulators for Components

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Technical Bulletin
L3751: Wide 6V to 75V Input Voltage Synchronous Buck Controller
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STマイクロエレクトロニクス - L3751

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SIMPLIS models (1)

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L3751 SIMPLIS example schematics
2024.07 08 Jul 2024
08 Jul 2024
L3751 SIMPLIS example schematics 2024.07

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 材料宣誓書**
L3751PUR
量産中
QFN 3.5X4.5X1.0 20L PITCH 0.50 インダストリアル Ecopack2

L3751PUR

Package:

QFN 3.5X4.5X1.0 20L PITCH 0.50

Material Declaration**:

PDF XML
More Info

Marketing Status

量産中

Package

QFN 3.5X4.5X1.0 20L PITCH 0.50

Grade

Industrial

RoHS Compliance Grade

Ecopack2

(**) 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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