The ML4870 is a continuous conduction boost regulator designed for DC to DC conversion in multiple cell battery power systems. It is capable of start-up with input voltages as low as 1.8V, and is available in 5V and 3.3V output versions. An integrated synchronous rectifier eliminates the need for an external Schottky diode and provides a lower forward voltage drop, resulting in higher conversion efficiency.
The ML4870 is a continuous conduction mode boost regulator designed for DC to DC conversion in multi-cell battery power systems. It features pulse frequency modulation and an internal synchronous rectifier to achieve high efficiency, capable of start-up at input voltages as low as 1.8V. The device offers 5V and 3.3V output versions with an accuracy of +3%.
| Output Voltage Versions | 5V and 3.3V |
|---|---|
| Output Voltage Accuracy | +3% |
| Maximum Switching Frequency | >200kHz |
| Peak Switch Current Limit | 1.3A |
| Quiescent Current (Shutdown) | 25-35 pA |
The regulator can start up with input voltages as low as 1.8V.
The controller limits the peak inductor current to about 1.3A.
The device operates with an input voltage ranging from 1.8V up to Vout minus 0.2V.
The design should maintain an output voltage with less than 100mV of ripple at full load current.