DC 5V to 3.3V Step-Down Power Supply Module -...
DC 5V to 3.3V Step-Down Power Supply Module -...
DC 5V to 3.3V Step-Down Power Supply Module -...
DC 5V to 3.3V Step-Down Power Supply Module - AMS1117-3.3 LDO (800mA)
DC 5V to 3.3V Step-Down Power Supply Module - AMS1117-3.3 LDO (800mA)
DC 5V to 3.3V Step-Down Power Supply Module - AMS1117-3.3 LDO (800mA)

DC 5V to 3.3V Step-Down Power Supply Module - AMS1117-3.3 LDO (800mA)

Modules
DET820
Part.No: AMS1117
€1.95
In Stock
Immediate Dispatch
AMS1117-3.3 LDO Step-Down Module — converts DC 5V (up to 7V) to a stable 3.3V output at up to 800mA. Compact and reliable, ideal for powering ESP32, ESP8266, and other 3.3V peripherals from a 5V supply.

 

The AMS1117-3.3 Power Supply Module (MPN: AMS1117) is a compact Low Dropout (LDO) voltage regulator that converts a DC 5V input (or up to 7V) into a clean, stable 3.3V output at up to 800mA. It is the go-to solution when you need to power 3.3V microcontrollers and wireless modules directly from a 5V supply rail, without complex circuitry.

Key Features

  • AMS1117-3.3 LDO Chip: Industry-standard low dropout regulator — stable 3.3V output even when input drops close to output voltage
  • 800mA Maximum Output Current: Sufficient to power demanding modules like ESP32, ESP8266, and WiFi/BLE peripherals — no additional current booster needed
  • Wide Input Voltage Range (4.5V–7V): Works directly from USB 5V, Arduino 5V pin, or a regulated wall adapter — flexible integration
  • Compact Form Factor: Tiny PCB footprint — fits easily into space-constrained enclosures and breadboard projects
  • Onboard Filtering Capacitors: Smooths input and output ripple — delivers clean power to sensitive RF and digital circuits

Pinout & Wiring

PINSymbolDescription
1VINDC Input Voltage (4.5V – 7V)
2GNDGround (common ground)
3VOUTRegulated 3.3V Output

Wiring note: Connect your 5V supply to VIN and GND, then take the regulated 3.3V from VOUT to power your target device. Ensure the GND of the source and the target device are connected to the same GND rail.

Compatibility

  • Arduino UNO / Nano / Mega: Use the Arduino's 5V pin as VIN input — the module outputs 3.3V for shields or sensors that require it
  • ESP32 / ESP8266: Power directly from VOUT — these modules operate at 3.3V and the 800mA output handles their WiFi transmission peaks
  • Raspberry Pi Peripherals: Supply 3.3V logic-level sensors or modules alongside a Raspberry Pi system
  • General 3.3V Peripherals: Any module, sensor, or IC requiring 3.3V from a 5V source

Typical Applications

  • Powering ESP8266 / ESP32 WiFi modules from a 5V USB or Arduino power rail
  • Supplying 3.3V sensors (e.g., BME280, SSD1306 OLED) in mixed-voltage Arduino projects
  • Providing clean 3.3V to LoRa or BLE modules sensitive to supply noise
  • Voltage regulation in custom PCB designs where a 5V rail is available but 3.3V logic is required
  • Prototyping and breadboard projects needing a quick, reliable 3.3V source

Technical Specifications

ParameterValue
Regulator ChipAMS1117-3.3 (LDO)
Input Voltage (VIN)DC 4.5V – 7V
Output Voltage (VOUT)3.3V (fixed)
Maximum Output Current800mA
Regulator TypeLow Dropout (LDO)
MPNAMS1117

FAQ

Q: Can I use this module to power an ESP32 directly from a 5V USB supply?
A: Yes. Connect the 5V USB line to VIN and the ESP32's 3.3V pin to VOUT. The 800mA output comfortably covers the ESP32's current needs, including WiFi transmission bursts.

Q: What happens if I exceed the 800mA output current limit?
A: The AMS1117 has built-in thermal shutdown and current limiting protection. However, sustained overload will cause the chip to overheat. Always stay within the 800mA rated output for reliable operation.

Package Contents: 1 × AMS1117-3.3 Step-Down Power Supply Module

⚠ Note: Although the input accepts up to 7V, the voltage difference between input and output (dropout) generates heat. At maximum current and high input voltage, ensure adequate ventilation or heatsinking for the module.
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