Overview
This 3.3 V boost (step-up) voltage regulator generates higher output voltages from input voltages up to 0.5 V and automatically switches to a linear downshift mode when the input voltage exceeds the output. This makes it ideal for powering 3.3V electronic projects from 1 to 3 NiMH, NiCd or alkaline cells, or from a single lithium ion cell. In addition, unlike most boost regulators, this device offers a true shutdown option that cuts off the power supply to the load (typical boost regulators pass the input voltage directly to the output when the function is disabled).
When boosting, this module acts as a switching regulator (also known as a switching power supply (SMPS) or DC/DC converter) and has a typical efficiency of between 70% and 90%. The available output current is a function of the input voltage, output voltage and efficiency (see Typical Efficiency and Output Current section below), but the input current can typically be up to 1.2A. This controller is also available with a fixed 5V or adjustable output, and very similar controllers are available in a much smaller size with a fixed 3.3V or fixed 5V output.
Features
Input voltage: 0.5 V to 5.5 V
Fixed 3.3 V output with 4% accuracy
Real shutdown option that turns off the power to the load.
Automatic linear trip control when the input voltage is greater than the output voltage.
1.2 A switch enables input power up to 1.2 A.
Good low load efficiency: <1 mA typical no-load quiescent current, although it can exceed 1 mA at very low input voltages (<100 μA typical quiescent current with SHDN = LOW).
| Shipping weight: | 0,02 Kg |
| Product weight: | 0,01 Kg |
