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 2 V to 16 V and increase or decrease them as necessary, offering a typical efficiency of over 85% and a typical output current of up to 1.5 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.
- Input voltage: 3 V to 16 V
- Fixed 3.3 V output with +5/-3% accuracy (can be changed to 5 V using the SEL pin)
- Typical maximum continuous output current: 1.5 A (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)
- Fixed 3 V low-voltage cutoff with hysteresis protects batteries from over-discharging (quiescent current is approximately 10 µA per volt on VIN when regulator is disabled)
- 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 1 mA while enabled)
- Integrated over-temperature and short-circuit protection
- Small size: 0.5? × 0.6? × 0.17? (12.7 × 15.3 × 4.3 mm)
- Size:0.5? × 0.6? × 0.17?1
- Weight:0.7 g1
- Minimum operating voltage:3 V
- Maximum operating voltage:16 V
- Maximum output current:1.5 A2
- Output voltage:3.3 V3
- Reverse voltage protection?:N
- Maximum quiescent current:1 mA4
- Low-voltage cutoff:3V (fixed)
- PCB dev codes:reg20b
- Other PCB markings:0J10534
- 1.Without included optional headers.
- 2.Under typical conditions, where the input voltage is close to the output voltage. Maximum output current can be higher when stepping down and lower when stepping up.
- 3.Output can be changed to 5 V by driving the SEL pin over 1.1 V.
- 4.With no load. Actual quiescent current depends on input voltage; it is typically under 300 µA when the input voltage is close to the output voltage.