5V Step-Up/Step-Down Voltage Regulator S9V11F5
The S9V11F5 switching step-up/step-down regulator efficiently produces 5V from input voltages between 2V and 16V. (Note: it requires an input voltage of at least 3V to start, but it can operate down to 2V after startup.) Its ability to convert both higher and lower input voltages makes it useful for applications where the power supply voltage can vary greatly, as with batteries that start above but discharge below 5V. The very compact (0.3″×0.45″) module has a typical efficiency of over 90% and can supply a typical output current of up to 1.5A when the input voltage is around 5V.
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)
- Fixed 5V output with +5/-3% accuracy
- Typical maximum continuous output current: 1.5A (when input voltage is around 5V; the Typical Efficiency and Output Current section below shows how the achievable continuous output current depends on the input voltage)
- Power-saving feature maintains high efficiency at low currents (quiescent current is less than 0.2mA)
- Integrated over-temperature and short-circuit protection
- Small size: 0.3″×0.45″×0.15″ (7.6×11.4×3.8mm)
Dimensions
| Size: | 0.3″ × 0.45″ × 0.15″1 |
|---|---|
| Weight: | 0.5 g1 |
General specifications
| Minimum operating voltage: | 2 V2 |
|---|---|
| Maximum operating voltage: | 16 V |
| Maximum output current: | 1.5 A3 |
| Output voltage: | 5 V |
| Reverse voltage protection?: | N |
| Maximum quiescent current: | 0.2 mA4 |