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L4973V5.1 Datasheet(PDF) 1 Page - STMicroelectronics |
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L4973V5.1 Datasheet(HTML) 1 Page - STMicroelectronics |
1 / 16 page L4973V3.3 - L4973V5.1 L4973D3.3 - L4973D5.1 3.5A STEP DOWN SWITCHING REGULATOR UPTO 3.5ASTEP DOWN CONVERTER OPERATING INPUT VOLTAGE FROM 8V TO 55V 3.3V AND 5.1V ( ±1%) FIXED OUTPUT, AND ADJUSTABLE OUTPUTS FROM: 0V TO 50V (3.3V type) 5.1V TO 50V (5.1 type) FREQUENCY ADJUSTABLE UP TO 300KHz VOLTAGE FEED FORWARD ZERO LOAD CURRENT OPERATION (min 1mA) INTERNAL CURRENT LIMITING (PULSE BY PULSE AND HICCUP MODE) PRECISE 5.1V (1.5%) REFERENCE VOLT- AGE EXTERNALLY AVAILABLE INPUT/OUTPUT SYNCHRONIZATION FUNC- TION INHIBIT FOR ZERO CURRENT CONSUMP- TION (100 µA Typ. at VCC = 24V) PROTECTION AGAINST FEEDBACK DIS- CONNECTION THERMAL SHUTDOWN OUTPUT OVERVOLTAGE PROTECTION SOFT START FUNCTION DESCRIPTION The L4973 is a step down monolithic power switching regulator delivering 3.5A at fixed volt- ages of 3.3V or 5.1V and using a simple external divider output adjustable voltage up to 50V. Realized in BCD mixed technology, the device April 2000 ® L4973 V CC (8V to 55V) C IN C2 ROSC COSC D1 L1 COUT VO(3.3V or 5.1V) CBOOT 4,5,6, 13,14,15 7 9 8 1 11 3 10 D97IN554A 17 RCOMP CCOMP CSS 2 16 12 TYPICAL APPLICATION CIRCUIT (POWERDIP) POWERDIP (12+3+3) SO20(12+4+4) ORDERING NUMBERS: L4973V3.3 (Powerdip) L4973D3.3 (SO20) L4973V5.1 (Powerdip) L4973D5.1 (SO20) MULTIPOWER BCD TECHNOLOGY 1/16 |
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