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Select all	Attribute	Value
	Brand	STMicroelectronics
	Output Voltage 1	5 V
	Product Type	Switching Regulator
	Output Current	300mA
	Mount Type	Surface
	Number of Outputs	1
	Minimum Operating Temperature	-40°C
	Maximum Operating Temperature	150°C
	Series	L7983
	Number of Pins	10
	Output Voltage 2	3.3V
	Package Type	DFN
	Width	3 mm
	Standards/Approvals	RoHS
	Length	3.3mm
	Depth	0.8mm
	Maximum Input Voltage	60V dc
	Minimum Input Voltage	60V dc

	Select all
	Brand STMicroelectronics
	Output Voltage 1 5 V
	Product Type Switching Regulator
	Output Current 300mA
	Mount Type Surface
	Number of Outputs 1
	Minimum Operating Temperature -40°C
	Maximum Operating Temperature 150°C
	Series L7983
	Number of Pins 10
	Output Voltage 2 3.3V
	Package Type DFN
	Width 3 mm
	Standards/Approvals RoHS
	Length 3.3mm
	Depth 0.8mm
	Maximum Input Voltage 60V dc
	Minimum Input Voltage 60V dc

Datasheet - L7983PUR

The L7983 device is a step-down monolithic switching regulator able to deliver up to 300 mA DC based on peak current mode architecture.

The output voltage adjustability ranges from 0.85 V to VIN. The wide input voltage range and adjustable UVLO threshold meet the specification for the 12 V, 24 V and 48 V industrial bus standards.

The “Low Consumption Mode” (LCM) is designed for applications active during idle mode, so it maximizes the efficiency at light load with controlled output voltage ripple. The “Low Noise Mode” (LNM) makes the switching frequency constant overload current range, meeting the low noise application specification. The L7983 supports dynamic LCM to LNM transition.

The soft-start time is internally fixed and the output voltage supervisor manages the reset phase for any digital load (microcontroller, FPGA, etc.).

The internal compensation network features high noise immunity, simple design and saves on the component cost.

The RST open collector output can also implement output voltage sequencing during the power-up phase.

The synchronous rectification, designed for high efficiency at medium - heavy load, and the high switching frequency capability make the size of the application compact.

Pulse-by-pulse current sensing on both power elements implements an effective constant current protection.

3.5 V to 60 V operating input voltage

Fixed output voltage (3.3 V and 5 V) or adjustable from 0.85 V to VIN

300 mA DC output current

Dynamic low consumption mode to low noise mode selection

10 μA operating quiescent current (L7983PU33R, VIN>24V,LCM

2.3 μA shutdown current

200 kHz to 2.2 MHz programmable switching frequency

Optional spread spectrum (dithering)

Internal soft-start

Enable / adjustable UVLO threshold

Synchronization to external clock

Internal compensation network

Internal current limiting

Overvoltage protection

Output voltage sequencing

Thermal shutdown

STMicroelectronics Switching Regulator, Surface, 5 V Output Voltage, 300 mA Output Current, 1 Outputs

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