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L4978 データシート - STMicroelectronics

L4978 image

部品番号
L4978

コンポーネント説明

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ST-Microelectronics
STMicroelectronics ST-Microelectronics

DESCRIPTION
The L4978 is a step down monolithic power switching regulator delivering 2A 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.
   
Features
■ UP TO 2A STEP DOWN CONVERTER
■ OPERATING INPUT VOLTAGE FROM 8V TO
    55V
■ PRECISE 3.3V (±1%) INTERNAL
    REFERENCE VOLTAGE
■ OUTPUT VOLTAGE ADJUSTABLE FROM
    3.3V TO 50V
■ SWITCHING FREQUENCY ADJUSTABLE UP
    TO 300KHz
■ VOLTAGE FEEDFORWARD
■ ZERO LOAD CURRENT OPERATION
■ INTERNAL CURRENT LIMITING (PULSEBYPULSE AND HICCUP MODE)
■ INHIBIT FOR ZERO CURRENT
    CONSUMPTION
■ PROTECTION AGAINST FEEDBACK
    DISCONNECTION
■ THERMAL SHUTDOWN
■ SOFT START FUNCTION
   

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部品番号
コンポーネント説明
PDF
メーカー
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STMicroelectronics
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