Evaluating the LTM3360B

See projects/ltm3360b (doxygen) for the Doxygen documentation.

Supported Evaluation Boards

  • EVAL-LTM3360B

Overview

The EVAL-LTM3360B evaluation board features the LTM3360B, a high-current step-down DC-to-DC µModule regulator with integrated I2C interface for digital control and monitoring. This complete power system delivers up to 33A of continuous output current at output voltages as low as 300mV.

Full performance details are provided in the LTM3360B data sheet, which should be consulted in conjunction with this user guide.

Hardware Specifications

Power Supply Requirements

An external power supply of 5V (2.9 to 5.5V) is required for this project.

Pin Description

I2C Interface (P2):

Pin

Name

Description

1

GND

Ground

2

SDA

I2C Serial Data

3

SCL

I2C Serial Clock

Power Connections (TP3 and TP4):

Pin

Name

Description

1

VIN

Input Power Supply, +5V

2

GND

Ground

No-OS Build Setup

Please see: https://wiki.analog.com/resources/no-os/build

No-OS Supported Examples

The initialization data used in the examples is taken out from: Project Common Data Path

The macros used in Common Data are defined in platform specific files found in: Project Platform Configuration Path

Basic Example

This is a simple example that demonstrates the LTM3360B capabilities:

  • Initializes the LTM3360B with default settings

  • Configures the output voltage to 1000mV

  • Enables the ADC for monitoring

  • Performs ADC reads from multiple channels (VOUT_P, VOUT_N, VIN)

  • Demonstrates basic functionality and communication

Steps of the basic example:

  1. Initialize UART for console communication

  2. Initialize the LTM3360B device with I2C interface

  3. Set output voltage to 1000mV

  4. Enable ADC for telemetry

  5. Read ADC values from VOUT+, VOUT-, and VIN channels

  6. Display results and exit

In order to build the basic example:

make EXAMPLE=basic

No-OS Supported Platforms

STM32 Platform

Used hardware

Connections:

I2C Interface:

EVAL-LTM3360B Pin

Mnemonic

Function

SDP-K1 Pin

P2.1

GND

Ground

GND

P2.2

SDA

I2C Serial Data

D14 (I2C1_SDA)

P2.3

SCL

I2C Serial Clock

D15 (I2C1_SCL)

Build Command

# to delete current build
make reset
# to build the project
make EXAMPLE=basic HARDWARE=sdp-k1.ioc

Hardware Setup Notes

  1. Power Supply: Connect a 5V DC power supply to VIN (TP3- TP4)

  2. Load: Connect an appropriate load to VOUT (TP16- TP17) for testing

  3. Console: Connect STM32 USB port for console communication via UART5

Troubleshooting

  • Check power supply voltage and current capability

  • Ensure proper grounding between all boards

  • Verify console UART settings (115200 baud, 8N1)