Product Description
This synchronous switching step-up/step-down regulator efficiently produces 12V from input voltages between 2.8 V and 22 V. 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 3.3 V. The board measures 0.9? × 0.9?, has a typical efficiency of 85% to 95%, and can supply typical continuous output currents between 0.5 A and 3 A depending on the input voltage. The regulator also features reverse voltage protection and an optional enable input that can be used to put the regulator in a low-power state with a current draw of less than 10 µA per volt on VIN.
The S13V25Fx 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 2.8 V to 22 V and increase or decrease them as necessary, offering a typical efficiency of over 85% and typical continuous output currents between 1 A and 3 A. 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 S13V25Fx regulators have under-voltage lockout, output over-voltage protection, over-current protection, and reverse-voltage protection up to 20 V. A thermal shutdown feature also helps prevent damage from overheating and a soft-start feature limits the inrush current and gradually ramps the output voltage on startup.
- Input voltage: 2.8 V to 22 V
- Output voltage: 12 V with 4% accuracy
- Typical maximum continuous output current: 0.5 A to 3 A, depending on input voltage (see the maximum continuous output current graph below)
- Typical efficiency of 85% to 95%, depending on input voltage and load (see the efficiency graph below)
- 10 mA to 35 mA typical no-load quiescent current (see the quiescent current graph below); can be reduced to 2 µA to 10 µA per volt on VIN by disabling the board
- Input under-voltage lockout and output over-voltage protection
- Soft-start feature limits inrush current and gradually ramps output voltage
- Integrated reverse-voltage protection up to 20 V, over-current protection, and over-temperature shutoff
- 5.1 A output current limit
- Fixed switching frequency of ~500 kHz
- Compact size: 22.9 mm × 22.9 mm × 9.7 mm (Without included optional headers or terminal blocks. Height with terminal blocks) installed is approximately 0.5?.
- Two 0.086? mounting holes for #2 or M2 screws
- Weight: 3.8g (Without included optional headers or terminal blocks.)
General specifications
- Minimum operating voltage: 2.8 V
- Maximum operating voltage: 22 V
- Continuous output current: 2.5 A (Under typical conditions, where the input voltage is close to the output voltage. Actual achievable continuous output current is a function of input voltage and is limited by thermal dissipation.)
- Output voltage: 12 V
- Reverse voltage protection?: Y (To -20 V. Connecting supplies over 20 V in reverse can damage the device.)
- Maximum quiescent current: 35 mA (While enabled with no load. Can be reduced to under 1 mA using the enable pin.)
