The SP6128A is a low voltage synchronous step down PWM controller from Sipex Corporation. It is optimized for single supply, 3V-5.5V applications and offers high efficiency, fast transient response, accurate fixed frequency and more. It is suitable for applications such as DSP, microprocessor core, I/O and logic, industrial control, distributed power and low voltage power.
The SP6128A is a fixed‑frequency, voltage‑mode, synchronous PWM controller designed for low‑voltage DC‑DC step‑down converters. It operates from a single 3 V‑5.5 V supply, provides up to 95 % efficiency, and integrates two N‑channel MOSFET drivers with internal non‑overlap circuitry.
Key features include an internal 300 kHz oscillator, programmable over‑current threshold, soft‑start circuit, UVLO protection, and a compact 14‑pin TSSOP package. The device is intended for applications requiring small size, high efficiency, and precise output regulation.
| Operating Frequency | 300 kHz |
|---|---|
| Quiescent Supply Current (Vcc) | 0.5 – 1.0 mA |
| Soft‑Start Slew Rate | 0.1 – 0.6 V/µs |
| UVLO Start Threshold | 2.8 V |
The controller uses an internal oscillator set to 300 kHz.
It includes an internal soft‑start circuit with a slew rate of 0.1‑0.6 V/µs that ramps the error‑amp reference during power‑up.
The UVLO start threshold is specified at 2.8 V.