The NCP5603 is an integrated circuit dedicated to medium power white LED applications. The power conversion is achieved by means of a charge pump structure, using two external ceramic capacitors, making the system extremely tiny. The device supplies a constant voltage to the load from a low battery voltage source. It is particularly suited for the High Efficiency LED used in low cost, low power applications, with high extended battery life.
The NCP5603 is an integrated charge‑pump converter designed for medium‑power white LED applications. It operates from a wide battery voltage range (2.7 V‑5.5 V) and provides a constant regulated output using two external ceramic capacitors.
The device includes selectable output voltage (4.5 V or 5.0 V), dimming via EN/PWM, and protection features such as 2.5 kV HBM ESD and 200 V machine‑model ESD. It is offered in a DFN10, 3 × 3 mm package and is Pb‑free compatible.
| Battery Supply Voltage Range | 2.7 V – 5.5 V |
|---|---|
| Maximum Pulsed Output Current | 350 mA |
| Efficiency | Up to 90 % |
| ESD Capability (Human Body Model) | 2.5 kV |
| Power Dissipation (at 85 °C) | 580 mW |
The device operates from 2.7 V to 5.5 V supply voltage.
The NCP5603 can deliver up to 350 mA pulsed output current.
It is available in a DFN10, 3 × 3 mm package, shipped on tape & reel.