L4973D3.3 Datasheet - STMicroelectronics

L4973D3.3 3.5A STEP DOWN SWITCHING REGULATOR

The L4973 is a step down monolithic power switching regulator delivering 3.5A at fixed voltages 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 VCC (8V to 55V) ROSC CIN C2 7 8 10 12 CBOOT VO(3.3V or 5.1V) L1 .

® L4973V3.3 - L4973V5.1 L4973D3.3 - L4973D5.1 3.5A STEP DOWN SWITCHING REGULATOR UPTO 3.5ASTEP DOWNCONVERTER 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 VOLTAGE EXTERNALLY AVAILABLE INPUT/OUTPUT SYNCHRONIZATION FU.

L4973D3.3 Features

* of this new generation of DC-DC conPIN CONNECTIONS (Top view) verter includes pulse by pulse current limit, hiccup mode for output short circuit protection, voltage feed forward regulation, soft start, input/output synchronization, protection against feedback loop disconnection, inhibit for zero cur

L4973D3.3_STMicroelectronics.pdf