Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Development Boards, Kits, Programmers > Evaluation Boards > DC/DC & AC/DC (Off-Line) SMPS Evaluation Boards

STMicroelectronics EVAL5983

Name: EVAL5983
Brand: STMicroelectronics
SKU: EVAL5983
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: EVAL5983

Manufacturer:: STMicroelectronics

Category:: DC/DC & AC/DC (Off-Line) SMPS Evaluation Boards

Package:

Datasheet:: EVAL5983.pdf

Description:: EVAL BOARD FOR L5983

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:4,821

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

EVAL5983 from STMicroelectronics is a demonstration board for the L5983 1.5 A step-down switching regulator IC, implementing a complete buck converter with adjustable 0.6–16 V output, 2.9–18 V input, and 500 kHz fixed switching frequency. It integrates all external components-including 6.8 µH inductor, STPS2L25V Schottky diode, and MLCC-compatible compensation-enabling immediate evaluation of high-efficiency DC/DC conversion in industrial power supplies.

For engineers reviewing the EVAL5983 datasheet, EVAL5983 pinout, EVAL5983 application, or EVAL5983 equivalent, this board delivers verified thermal performance, zero-load current operation, internal soft-start, and over-current/thermal protection-critical for validating L5983-based designs before PCB layout and volume production.

Technical Context

The EVAL5983 implements a synchronous buck topology using the L5983 controller IC in VFQFPN8 (3 mm × 3 mm) package, with external MOSFET drive disabled and Schottky rectification. Input filtering uses a 10 µF/25 V Murata GRM31CR61E106KA12 capacitor; output filtering employs a 22 µF/16 V GRM31CR61C226KE15B MLCC, stabilized by a Type II compensation network.

Switching frequency is set to 500 kHz via 100 kΩ resistor (R5) on FSW pin; output voltage is preset to 3.3 V via 4.99 kΩ/1.1 kΩ resistor divider (R1/R2), and adjustable down to 0.6 V or up to 16 V. The board supports 100% duty-cycle low-dropout operation and operates with no load.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Current	1.5 A DC continuous-supports full-load testing of L5983 under thermal regulation.
Input Voltage Range	2.9 V to 18 V-covers wide industrial input rails including 3.3 V, 5 V, 12 V, and 15 V systems.
Output Voltage Range	0.6 V to 16 V-enables validation of L5983's adjustable feedback loop across sub-1 V logic rails to 15 V analog supplies.
Switching Frequency	500 kHz (programmable 250 kHz–1 MHz)-optimized for compact magnetics and low EMI in space-constrained designs.
Protection Features	Over-current and thermal shutdown-hardware-enforced safety limits prevent damage during fault conditions.
Zero-Load Operation	Validated no-load quiescent current-confirms L5983's ability to maintain regulation without minimum load requirement.
Package Footprint	VFQFPN8 3 mm × 3 mm-matches L5983's actual IC package for accurate thermal and layout correlation.

Availability

EVAL5983 is available at Aetrix Electronics and suitable for industrial power supply validation, embedded system DC/DC prototyping, and automotive subsystem power design requiring stable component supply and rapid functional verification.

Supply support for EVAL5983 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing microcontrollers, power ICs, sensors, and analog devices for industrial, automotive, and consumer applications.

The EVAL5983 belongs to ST's evaluation board product line, developed specifically to accelerate adoption of its L5983 step-down regulators by providing fully assembled, tested, and documented reference implementations.

FAQ

What is the purpose of the R5 resistor on the EVAL5983 board?

R5 (100 kΩ) connects to the FSW pin of the L5983 IC and sets the switching frequency to 500 kHz per the device's oscillator programming equation. This value is confirmed in the board's schematic and matches ST's recommended resistor-to-frequency mapping for stable operation with the installed 6.8 µH inductor and output capacitance.

Can the output voltage be adjusted to 5 V, and how is it done?

Yes-the output voltage is adjustable from 0.6 V to 16 V using the external resistor divider on FB pin. To set 5 V, replace R1 (4.99 kΩ) and R2 (1.1 kΩ) with values satisfying VOUT = 0.6 V × (1 + R1/R2); for 5 V, typical values are R1 = 22.1 kΩ and R2 = 3.01 kΩ, maintaining 1% tolerance and 0.1 W rating.

Does the EVAL5983 support synchronous rectification?

No-the board uses the STPS2L25V Schottky diode for asynchronous rectification. The L5983 IC itself supports both synchronous and asynchronous modes, but the EVAL5983 implementation disables internal high-side MOSFET drive and relies on external diode conduction, as shown in the application circuit and component list.

Is MLCC output capacitance stable under load transients on this board?

Yes-the compensation network (C3 = 2.2 nF, C5 = 220 pF, R3 = 330 Ω, R4 = 2.49 kΩ) is designed specifically for MLCC output capacitors like the 22 µF GRM31CR61C226KE15B. ST confirms loop stability across 0–1.5 A load steps with <5 % overshoot and <20 µs settling time per the board's test data.

EVAL5983 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Packaging:: Box

Product Status:: Active

Main Purpose:: DC/DC, Step Down

Outputs and Type:: 1 Non-Isolated Output

Voltage - Output:: -

Current - Output:: 3.3V

Voltage - Input:: 1.5A

Regulator Topology:: 3.3V ~ 18V

Frequency - Switching:: Buck

Contents:: -

Utilized IC / Part:: Board(s)

Power - Output:: L5983

EVAL5983 FAQ

1.How can I place an order for EVAL5983 through Aetrix?

Please submit a Request for Quotation (RFQ) for EVAL5983 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for EVAL5983 reliable?

The price and inventory of EVAL5983 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for EVAL5983 is usually 5 days.

3.What payment methods are accepted for EVAL5983?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for EVAL5983 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for EVAL5983?

EVAL5983 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your EVAL5983 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for EVAL5983?

For technical support, including EVAL5983 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your EVAL5983 requirements.

6.How does Aetrix verify that EVAL5983 is sourced from the original manufacturer or authorized distributors?

All EVAL5983 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that EVAL5983 meets industry standards.

7.What is the process for return or replacement of EVAL5983?

All EVAL5983 units undergo pre-shipment inspection (PSI). If there is an issue with EVAL5983, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The EVAL5983 part is unused and in its original packaging.

Return procedure for EVAL5983:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…