ST755 is an adjustable inverting switch-mode DC-DC regulator with internal Power MOSFET that generators an adjustable negative output from a voltage input of 2.7V to 11V.
The ST755 is an adjustable inverting switch‑mode DC‑DC regulator that converts a 2.7 V‑11 V input to a regulated negative output (up to –12.7 V) with up to 1 W guaranteed output power. It features a built‑in Power MOSFET, a fixed 160 kHz oscillator, very low quiescent current (1.2 mA on) and a soft‑start circuit.
The device includes a shutdown pin that reduces supply current to about 10 µA, a reference output of 1.25 V, and detailed pin and mechanical data for both DIP‑8 and SO‑8 packages. Typical application circuits, performance graphs, and layout recommendations are provided to help designers achieve high efficiency (≈68 % at 6 V) and low noise operation.
| Input voltage range | 2.7 V to 11 V |
|---|---|
| Output current (max) | 275 mA (typical) |
| Quiescent current (ON) | 1.2 mA |
| Shutdown current (low) | ≈10 µA |
| Oscillator frequency | 160 kHz |
| Reference output voltage | 1.25 V |
| Thermal resistance (junction‑ambient) | 160 °C·W⁻¹ |
The ST755 operates with an input voltage from 2.7 V up to 11 V.
When the SHDN pin is pulled low, the device enters shutdown mode and the supply current drops to about 10 µA.
The regulator uses a fixed 160 kHz oscillator.