Product: Voltage regulator that converts 1.8V–5V input to a stable 3.3V output Key benefits Provides a reliable 3.3V supply from a wide range of inputs (1.8V to 5V), simplifying power design for mixed-voltage systems. Recommended input above 2V for best performance. High conversion efficiency (up to 96%) reduces heat and extends battery life. Efficiency improves when the difference between input and output voltages is smaller. Supports up to 3A output current for powering high-current modules while offering low quiescent consumption for energy-sensitive applications. Main features and specifications Input voltage: 1.8V–5V (recommended > 2V) Output voltage: 3.3V Output current: up to 3A Conversion efficiency: up to 96% (depends on VIN–VOUT differential) Static (quiescent) current: 6 mA (active); 50 uA (power-saving mode) Output-setting formula: R3 = R1 × (Vout / VFB − 1) Typical feedback reference: VFB = 500 mV Example for 3.3V output: R1 = 180 kΩ, R3 = 1 MΩ How this product solves common problems Eliminates the need for multiple discrete regulators by providing a single solution that accepts both lower and higher voltage sources and outputs stable 3.3V. Reduces power loss and thermal design requirements thanks to high efficiency, which is especially useful in compact or sealed enclosures. Minimizes standby battery drain with a low-power mode (50 uA) for long-term, battery-powered deployments. Compatibility and integration notes Works with common power sources: single-cell and multi-cell batteries, USB 5V, and other 1.8–5V rails. Suitable for board-level integration; use the provided resistor formula to set feedback divider values when fine-tuning or confirming the 3.3V output. No changes to the specified electrical limits should be assumed; observe the recommended input voltage and maximum current ratings. Practical use scenarios Battery-powered IoT sensor: Run a 3.3V microcontroller and radio from a single-cell Li-ion or low-voltage battery, benefiting from low standby current and high conversion efficiency to maximize battery life. USB-powered development board: Convert 5V from USB to a stable 3.3V rail for microcontrollers, sensors, and peripherals without excessive heat generation. High-current wireless module: Supply peak currents (up to 3A) for Wi‑Fi or cellular modules while keeping quiescent draw low between transmissions. Design tips Use the output-setting formula with the typical VFB = 500 mV to select R1 and R3; the example values (R1 = 180 kΩ, R3 = 1 MΩ) produce 3.3V. For best efficiency and thermal performance, keep input voltage as close to 3.3V as practical within the allowed range. Ensure PCB layout follows good power-regulator practices (short traces on input/output, proper decoupling) to maintain stability and minimize noise. Specifications summary Input: 1.8V–5V (recommended > 2V) Output: 3.3V Max output current: 3A Efficiency: up to 96% (higher when VIN ≈ VOUT) Quiescent current: 6 mA (active), 50 uA (power saving) Feedback: VFB = 500 mV (typical); R3 = R1 × (Vout/VFB − 1); example for 3.3V: R1 = 180 kΩ, R3 = 1 MΩ