2.5-9V Fine-Adjust Step-Up/Step-Down Voltage Regulator S9V11MA
The S9V11MA switching step-up/step-down regulator efficiently produces a finely adjustable output between 2.5V and 9V whether it is higher or lower than the input voltage, which can range from 2V to 16V. (Note: minimum start-up voltage is 3V, but it operates to 2V after that.) The compact (0.5″×0.6″) module can supply a typical output current of up to 1.5A when the input voltage is close to the output voltage.
The S9V11x family of efficient switching regulators (also called switched-mode power supplies (SMPS) or DC-to-DC converters) use a buck-boost topology to convert both higher and lower input voltages to a regulated output voltage. They take input voltages from 2V to 16V and increase or decrease them as necessary, offering a typical efficiency of over 85% and a typical output current of up to 1.5A. The flexibility in input voltage offered by this family of regulators is especially well-suited for battery-powered applications in which the battery voltage begins above the regulated voltage and drops below as the battery discharges. Without the typical restriction on the battery voltage staying above the required voltage throughout its life, new battery packs and form factors can be considered.
The different members of this family offer different output voltage options, from fixed voltages with selectable alternatives to adjustable voltages that can be set anywhere between 2.5V and 9V using a precision 12-turn potentiometer. Some versions also have an adjustable low-voltage cutoff that can be set anywhere in the 2V to 16V output voltage range and used to prevent your battery from over-discharging. This is particularly useful for battery chemistries that can be damaged when over-discharged, including Li-ion and LiPo.
Features
- Input voltage: 2Vto16V (note: this regulator requires 3V to start, but it can operate down to 2V after startup)
- Output voltage: 2.5V to 9V (precision-adjustable using built-in 12-turn potentiometer)
- Typical maximum continuous output current: 1.5A (when input voltage is close to the output; the Typical efficiency and output current section below shows how the achievable continuous output current depends on the input and output voltages)
- Power-good indicator can be used to tell when the regulator has reached and is maintaining its target output voltage
- Power-saving feature maintains high efficiency at low currents (quiescent current is less than 1mA while enabled and approximately 7µA per volt on VIN when regulator is disabled)
- Integrated over-temperature and short-circuit protection
- Small size: 0.5″×0.6″×0.25″ (12.7×15.3×6.4mm)
Dimensions
| Size: | 0.5″ × 0.6″ × 0.25″1 |
|---|---|
| Weight: | 0.8 g1 |
General specifications
| Minimum operating voltage: | 2 V2 |
|---|---|
| Maximum operating voltage: | 16 V |
| Maximum output current: | 1.5 A3 |
| Minimum output voltage: | 2.5 V4 |
| Maximum output voltage: | 9 V4 |
| Reverse voltage protection?: | N |
| Maximum quiescent current: | 1 mA5 |