L7987

量産中
Design Win Education
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61 V 3 A asynchronous step-down switching regulator with adjustable current limitation

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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 VIN. 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 VBIASpin 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
    • RDS,ON= 250 mΩ typ.
    • Adjustable fSW(250 kHz - 1.5 MHz)
    • Low IQ-SHD (11 μA typ. from VIN)
    • Low IQ (1 mA typ. - VIN24 V - VOUT3.3 V)
    • Output voltage adjustable from 0.8 V to VIN
    • 同期化
    • Adjustable soft-start time
    • Adjustable current limitation
    • Low dropout operation (12 μs max.)
    • VBIASimproves 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
    続きを読む 一部を表示

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SPICE models (1)

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L7987 Pspice model
1.0 02 Nov 2017
02 Nov 2017
L7987 Pspice model 1.0

SIMPLIS models (1)

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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 材料宣誓書**
L7987
量産中
HTSSOP16 インダストリアル Ecopack2
L7987TR
量産中
HTSSOP16 インダストリアル Ecopack2

L7987

Package:

HTSSOP16

Material Declaration**:

PDF XML
More Info

Marketing Status

量産中

Package

HTSSOP16

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L7987TR

Package:

HTSSOP16

Material Declaration**:

PDF XML
More Info

Marketing Status

量産中

Package

HTSSOP16

Grade

Industrial

RoHS Compliance Grade

Ecopack2

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