YB1680 is a high efficiency synchronous step-down converter from Yobon company, and it is ideal for powering portable equipment that runs from a single cell lithium-Ion (Li+) battery
The YB1680 is a 1.5 MHz constant‑frequency, slope‑compensated current‑mode PWM step‑down converter that integrates a main switch and a synchronous rectifier, eliminating the need for an external Schottky diode. It delivers up to 600 mA output current from a 2.5 V–5.5 V input range, with efficiency up to 94 % and a low quiescent current of 300 µA.
Typical applications include cellular phones, PDAs, MP3 players, and other portable equipment powered by a single‑cell Li‑ion battery. The handbook details pin configuration, absolute maximum ratings, electrical characteristics, recommended inductor and capacitor selections, and design guidelines for dropout and idle‑mode operation.
| Switching Frequency | 1.5 MHz |
|---|---|
| Input Voltage Range | 2.5 V to 5.5 V |
| Maximum Output Current | 600 mA |
| Efficiency | Up to 94 % |
| Quiescent Current (Active Mode) | 300 µA |
| Shutdown Current | < 1 µA |
| Package | SOT23‑5 (5‑pin) |
The device operates from 2.5 V to 5.5 V input voltage.
It can supply up to 600 mA of output current.
The converter achieves up to 94 % efficiency.
The YB1680 is offered in a 5‑pin SOT23‑5 package.