The NCP1404 series are monolithic PWM/PFM step-up DC to DC converters which can automatically change operation mode from PWM to PFM at light loads to improve efficiency at light loads. With only four external components, this series allow a simple means to implement highly efficient converters for powering up portable equipment up to 350 mA loading. Additionally, this series is featured with a Low Battery Detector to monitor battery voltage.
The NCP1404 series provides a highly efficient step‑up conversion solution for portable equipment. It operates in PWM mode at higher loads and automatically switches to PFM mode at light loads, improving efficiency while requiring only four external components.
Key features include a low start‑up voltage of 0.8 V, 600 kHz oscillator frequency, up to 350 mA output current, and built‑in low‑battery detection. Typical applications listed are digital cameras, cellular phones, PDAs, camcorders, electronic games, pagers, portable audio devices, and handheld instruments.
| Low Start‑Up Voltage | 0.8 V |
|---|---|
| PWM Oscillator Frequency | 600 kHz |
| Efficiency (typical) | 85 % at 200 mA, 2.5 V in, 3.3 V out |
| Maximum Output Current | 350 mA |
The device starts up at a minimum voltage of 0.8 V.
It is supplied in a space‑saving TSOP‑6 package.
The converter can deliver up to 350 mA of output current.
The PWM oscillator runs at 600 kHz.