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 V_IN
300 mA DC output current
Dynamic low consumption mode to low noise mode selection
10 µA operating quiescent current (L7983PU33R, V_IN > 24 V, 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

수량	한팩당	한팩당*
5 - 745	₩2,951.60	₩14,758.00
750 - 1495	₩2,880.16	₩14,400.80
1500 +	₩2,835.04	₩14,175.20

모두 선택	제품 정보	값
	브랜드	STMicroelectronics
	Output Voltage	3.3V
	Output Current	300mA
	Input Voltage	60V dc
	Mounting Type	Surface Mount
	Number of Outputs	1
	Package	DFN

	모두 선택
	브랜드 STMicroelectronics
	Output Voltage 3.3V
	Output Current 300mA
	Input Voltage 60V dc
	Mounting Type Surface Mount
	Number of Outputs 1
	Package DFN

STMicroelectronics Switching Regulator, Surface Mount, 3.3V Output Voltage, 60V dc Input Voltage, 300mA Output Current,

For these non-cancellable (NC), and non-returnable (NR) products, Terms and Conditions apply.

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