ohahaha

38V, 3A Synchronous Buck Switching Regulator Evaluation Board Based on L6983NQTR

STEVAL-ISA209V1

Overview

The L6983 is an easy to use synchronous monolithic step-down regulator capable of delivering up to 3 A DC to the load, and the wide input voltage range makes the device suitable for a broad range of applications. The L6983NQTR used in this evaluation board is based on peak current mode architecture and is packaged in a QFN16 3x3 with internal compensation, thus minimizing design complexity and size.

The L6983 is available in low consumption mode (LCM) and low noise mode (LNM) versions. LCM maximizes the efficiency at light-load with controlled output voltage ripple, which is ideal for battery-powered applications. LNM sets the switching frequency and minimizes the output voltage ripple overload current range, meeting the specification for low noise sensitive applications.
The L6983 allows a 200 Hz - 2.2 MHz switching frequency range with optional spread spectrum for improved EMC. The EN pin provides an enable/disable function, and the typical shutdown current is 2 μA when disabled. As soon as the EN pin is pulled up, the device is enabled and an internal 1.3 ms soft-start sequence is triggered.
The device also features a Power Good open collector that monitors the FB voltage. Pulse-by-pulse current sensing on both power elements implements effective constant current protection and thermal shutdown prevents thermal run-away.

Main features

3.5 V to 38 V operating input voltage
Output voltage from 0.85 V to VIN
3.3 V and 5 V fixed output voltage versions
3 A DC output current
17 μA operating quiescent current
Internal compensation network
Two different versions:
- LCM for high efficiency at light loads
- LNM for noise sensitive applications
2 μA shutdown current
Internal soft-start

Enable
Overvoltage protection
Output voltage sequencing
Thermal protection
QFN16 package
200 kHz to 2.2 MHz programmable switching frequency; stable with low ESR capacitor.
Optional spread spectrum for improved EMC
Power Good
Synchronization to external clock for LNM devices

Design Files

All reference designs on this site are sourced from major semiconductor manufacturers or collected online for learning and research. The copyright belongs to the semiconductor manufacturer or the original author. If you believe that the reference design of this site infringes upon your relevant rights and interests, please send us a rights notice. As a neutral platform service provider, we will take measures to delete the relevant content in accordance with relevant laws after receiving the relevant notice from the rights holder. Please send relevant notifications to email: bbs_service@eeworld.com.cn.

It is your responsibility to test the circuit yourself and determine its suitability for you. EEWorld will not be liable for direct, indirect, special, incidental, consequential or punitive damages arising from any cause or anything connected to any reference design used.

Hot

Technical Resources More

Search Datasheet?

Supported by EEWorld Datasheet

Technical Videos More

Forum More

Update:2025-06-20 10:24:48

Verilog task call
Although initial and always statements cannot appear in a task, task call statements can beused in initial and always statements. The syntax is as follows:task_id[(port 1, port 2, ........, port N)];w
With Murray's suggestion, the community has taken another small step forward~~~
:victory:
FX-20P-E Handheld Programmer Operation Manual
User manual of Mitsubishi handheld programmer. I used it when I was learning programming. Although it is not as intuitive as a computer, it also helps me remember the instructions. I hope it will be u
I am a beginner in MSP430, how do I start?
I have learned 51 single chip microcomputer before, but I didn't study it seriously. Now I start to contact msp430, and I feel I don't know where to start. I hope experts can give me some advice so th
Principle of electromagnetic flowmeter
1. Overview Electromagnetic flowmeter (hereinafter referred to as EMF) is an instrument for measuring the volume flow of conductive liquids using Faraday's law of electromagnetic induction. In the ear
My 2407 cannot be simulated. The following phenomenon is observed. Please help me check the reason.
Can the chip be scanned using the usb20emurst program?You can only determine whether it is connected, the emulator cannot tell whether you can scan the chip.

Datasheet More

Circuits More