3.3V DD38LOSA DC-DC Converter, Voltage Stabilization Device,Input DC6-40V 5W, Power Supply Module

This is the 3V variant of the 3.3V DD38LOSA DC-DC Converter, Voltage Stabilization Device,Input DC6-40V 5W, Power Supply Module in Buck Converter. Available at ₹193.52 (₹164.00 + GST) with free shipping across India.

PRODUCT DESCRIPTION

The 3.3V DD38LOSA DC-DC Converter is a voltage stabilization module designed to provide a stable 3.3V output from an input range of DC 6-40V, with a maximum power output of 5W.

This module features a DC-DC converter that accepts a wide input voltage range, paired with an LDO (Low Dropout) linear regulator to ensure a highly regulated and stable output. It’s ideal for applications requiring consistent voltage performance across varying input conditions.

Operation:

The DC-DC input section can take a range of 5.2 to 40V on its input.

It uses the ME3116 switching regulator IC that operates at 550kHz and is configured to provide a fixed output voltage set to 4.7V.  Efficiency of this section is 85-90%.

The 4.7V is then feed to an LDO 1117A-3.3 linear regulator.  This regulator trims the 4.7V down to the final 3.3V output while also helping to filter the ripple and noise on the output of the DC-DC section.  Efficiency of this section is 71-78% giving an overall efficiency of 60-70% for the module.

The final output has a ripple of 12-20mV under most conditions.  It doesn’t remove it completely due to the tight circuit coupling between the DC-DC converter and linear sections on the small board.  It is still 2-10x better than what most DC-DC converters can provide when used alone.  Measurements were done with a 100uF bulk capacitor on the output.

Because the linear regulator is always dropping a minimal voltage amount, it can operate at its full 700mA current rating independent of the input voltage.

Connections:

There is a 3-pin right angle header for making connections.

1 x 3 Header

• I = Vin – Connects to 5.2 – 40V
• G = Ground
• O = 3.3V output

These are handy modules that can help resolve some common problems related to trying to generate a fairly clean 3.3V from a relatively high input voltage without having to derate the output current based on the input voltage like when using a linear regulator alone.

We tested these over over the full range of 5.2 to 40V at 700mA load without any issues.  At full load the module does run quite warm as expected.

The modules can handle up to 1A for short periods of time and we have tested to 800mA for extended periods at 25C ambient.

One quirk we have seen in our testing is that if the load is more than 600mA without any bulk capacitance on its output, the output can go into a current limit or other shutdown mode when power is first applied.  We have only seen this when testing using electronic dummy loads.  Add even a 10uF capacitor on the output resolves this, so it is not expected to be an issue under normal circuit conditions.

One thing to be aware of whenever using any breadboard friendly power module is that while the module may be able to handle 700+mA, the typical breadboard jumper wires will have a fairly significant voltage loss passing that much current. When using with higher current loads you may need to double-up on the wires or use heavier gauge wires on the output voltage connections to minimize the voltage drop.

note:

Inspected

3.3V output verified

Packaged in a resealable ESD bag for protection and easy storage.

Under high current loads the module can get hot, so use care when handling.

Specification:

Without Pin
3.3V: Input Voltage 6-40V, Output 3.3V
DC-DC Converter 6V to 4.6V, LDO Regulator to 4.6V to 3.3V.
5V: Input Voltage 8-40V, Output 5V
DC-DC Converter 8-40V to 6.4V, LDO Regulator 6.4V to 5V.
Maximum Output Current 700mA, Short-Term Maximum Output Current 1000mA
Working Frequency:550KHz
Efficiency:DC-DC Converter 85-90%, LDO 71-78%, Overall Efficiency 60-70%
Quiescent Current: About 1.5mA

Package Include:

1 x 3.3V DD38LOSA DC-DC Converter, Voltage Stabilization Device, Input DC6-40V 5W, Power Supply Module

3.3V DD38LOSA DC-DC Converter, Voltage Stabilization Overview

The 3.3V DD38LOSA DC-DC Converter is a compact voltage stabilization module that converts a wide DC input (6–40V) to a clean 3.3V output, delivering up to 700mA continuously. It combines a high-efficiency switching regulator with an LDO linear stage to minimize ripple and ensure stable performance in demanding electronic projects.

Key Features of 3.3V DD38LOSA DC-DC Converter, Voltage Stabilization

• Wide input range: DC 6–40V for compatibility with batteries, adapters, and automotive systems
• Dual-stage regulation: 550kHz ME3116 switching converter to 4.7V, followed by 1117A-3.3 LDO for low ripple
• Maximum output current: 700mA continuous, 1000mA short-term for surge loads
• High efficiency: 85–90% in the DC-DC stage to reduce heat and prolong battery life
• Compact power module: 5W rating in a small footprint ideal for space-constrained PCBs
• Fast shipping from Zbotic: Receive genuine modules within 24 hours (when in stock)

Applications and Use Cases

• Powering 3.3V microcontrollers (ESP32, STM32) from 12V automotive or battery sources
• Supplying sensors and low-power radio modules that require stable, low-noise rails
• LED lighting drivers in portable equipment and industrial control panels
• Embedded IoT gateways and data loggers in outdoor or vehicle environments
• Backup power systems where voltage must remain rock-solid during input fluctuations

How to Use 3.3V DD38LOSA DC-DC Converter, Voltage Stabilization

Connect your DC input (6–40V) to the VIN+ and VIN– pads, then wire the VOUT+ and VOUT– pads to your 3.3V load. Ensure proper polarity and add input/output decoupling capacitors close to the module. Mount on a heat-dissipating surface or add a small heatsink if driving near the maximum current to maintain thermal stability.

Why Buy from Zbotic?

• Genuine Products: All items sourced from authorized distributors
• Fast Shipping: Orders ship within 24 hours with tracking (non backordered products)
• Free Shipping: Free delivery on qualifying orders
• COD Available: Cash on Delivery, UPI, cards, net banking
• Technical Support: Expert help for setup and troubleshooting
• Easy Returns: Hassle-free replacement for defective products

Frequently Asked Questions

What is the input voltage range for this module?

This converter accepts any DC source between 6V and 40V. It’s ideal for 12V automotive batteries, 24V industrial supplies, and higher-voltage adapters.

How much current can I draw continuously?

The DD38LOSA module provides up to 700mA of steady output current at 3.3V. It can handle short-term peaks up to 1000mA for brief surge demands.

Do I need a heatsink when running at full load?

At currents near 700mA, the switching stage remains efficient but the LDO may dissipate some heat. We recommend mounting on a metal surface or adding a small heatsink to ensure reliable operation.