Stmicroelectronics L4973V5.1 DC-DC Switching Buck (Step Down) Regulator Adjustable 8V-55Vin 5.1V-50Vout 3.5Aout DIP-18

The L4973V5.1 is a step-down monolithic power Switching Regulator delivering 3.5A at fixed voltage of 3.3 or 5.1V and using a simple external divider output adjustable voltage up to 50V. Realized in BCD mixed technology, the device uses an internal power D-MOS transistor (with a typical RDS(on) of 0.15R) to obtain very high efficiency and very fast switching times. Switching frequency up to 300kHz is achievable. A wide input voltage range between 8 to 55V and output voltages regulated from 3.3 to 40V cover the majority of the today applications. Features of this new generation of DC-to-DC converter 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 current consumption and thermal shutdown.

• Inhibit for zero current consumption (100mA at VCC=24V)
• Input/output synchronization function
• Protection against feedback disconnection
• Output overvoltage protection
• Internal current limiting (pulse by pulse and HICCUP mode)
• Zero load current operation (minimum 1mA)
• Precise 5.1V (1.5%) reference voltage externally available

Applications

Power Management

Warnings Market demand for this product has caused an extension in leadtimes. Delivery dates may fluctuate. Product exempt from discounts.

Other details

Brand	STMICROELECTRONICS
Part Number	L4973V5.1
Quantity	Each
Technical Data Sheet EN
Product Change Notice EN
EOL Notices EN

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