The NCP1402 series are monolithic micropower step-up DC to DC converters that are specially designed for powering portable equipment from one or two cell battery packs. These devices are designed to start-up with a cell voltage of 0.8V and operate down to less than 0.3V. With only three external components, this series allows a simple means to implement highly efficient converters that are capable of up to 200mA of output current at Vin = 2.0V, VOUT = 3.0V. Each device consists of an on-chip PFM (Pulse Frequency Modulation) oscillator, PFM controller, PFM comparator, soft-start, voltage reference, feedback resistors, driver, and power MOSFET switch with current limit protection. Additionally, a chip enable feature is provided to power down the converter for extended battery life. The NCP1402 device series are available in the Thin SOT-23-5 package with five standard regulated output voltages. Additional voltages that range from 1.8V to 5.0V in 100mV steps can be manufactured.
The NCP1402 series is a monolithic micropower step‑up DC‑DC converter designed for portable equipment powered from one or two cell batteries. It starts up at 0.8 V, operates down to less than 0.3 V, and can deliver up to 200 mA of output current with typical efficiency of 85 %.
Typical applications include cellular phones, PDAs, portable audio, camcorders and handheld instruments. The device is supplied in a thin SOT‑23‑5 package and requires only three external components. Ordering information, absolute maximum ratings and detailed electrical characteristics are provided in the following sections.
| Start‑up voltage (minimum) | 0.8 V |
|---|---|
| Operating current (low power mode) | 30 µA |
| Maximum output current | 200 mA |
| Efficiency (typical) | 85 % (Vin = 2.0 V, Vout = 3.0 V, 70 mA) |
| Output voltage accuracy | ±2.5 % |
| Maximum input voltage | 6.0 V |
| Peak sink current (LX pin) | 400 mA |
| Operating ambient temperature range | -40 °C to +85 °C |
| Package | Thin SOT‑23‑5 |
The device can start up with a voltage as low as 0.8 V.
Only three external components are required.
It can deliver up to 200 mA of output current.
The regulator is offered in a thin SOT‑23‑5 package.