The SP7650 is a 3A, 300kHz, synchronous step-down switching regulator from Sipex Corporation. The device has a maximum input voltage of 2.5V to 28V, an output voltage down to 0.8V, and a 3A output capability. It integrates low RDSON power switches, is highly integrated, and has a minimal number of external components. The device operates at a fixed frequency of 300 kHz and has UVLO, overtemperature protection, and short circuit protection.
The SP7650 is a fixed‑frequency, voltage‑mode, synchronous PWM buck regulator optimized for high efficiency, offering a wide input range (2.5 V‑28 V) and up to 3 A output current. It integrates low‑resistance MOSFET switches, UVLO, thermal shutdown, and short‑circuit protection.
The document includes electrical specifications, pin descriptions, theory of operation, design guidelines for inductors and capacitors, package dimensions, and ordering information, helping designers implement the regulator in distributed power systems.
| Input Voltage Range | 2.5 V to 28 V |
|---|---|
| Maximum Output Current | 3 A |
| Switching Frequency | 300 kHz |
| Efficiency | >95 % |
| Thermal Shutdown Temperature | 145 °C |
| Package | 26‑pin DFN, 7 mm × 4 mm |
Soft start is set by connecting a capacitor between the SS pin and GND, which uses the 10 µA source current and the internal 0.8 V reference to control the start‑up rate.
The regulator accepts an input voltage up to 28 V.