Features: Guaranteed full load start-up and operation at 1.8V Input
Continuous conduction mode for high output current
Very low supply current (20µA output referenced) formicro power operation
Pulse frequency modulation and internal synchronous rectification for high efficiency
Maximum switching frequency > 200kHz
Minimum external components
Low ON resistance internal switching FETs
5V and 3.3V output versions
Pinout
SpecificationsVOUT .......................................................................... 7V
Voltage on any other pin .....GND 0.3V to VOUT + 0.3V
Peak Switch Current (IPEAK) ......................................... 2A
Average Switch Current (IAVG) ..................................... 1A
Junction Temperature .............................................. 150ºC
Storage Temperature Range ...................... 65ºC to 150ºC
Lead Temperature (Soldering 10 sec) ...................... 260ºC
Thermal Resistance (qJA) .................................... 160ºC/W
Description The ML4872ES-3 is a continuous conduction boost regulator designed for DC to DC conversion in multiple cell battery powered systems. Continuous conduction allows the regulator to maximize output current for a given inductor.The maximum switching frequency can exceed 200kHz,allowing the use of small, low cost inductors. The ML4872ES-3 is capable of start-up with input voltages as low as 1.8V and is available in 5V and 3.3V output versions with an output voltage accuracy of ±3%.
An integrated synchronous rectifier ML4872ES-3 eliminates the need for an external Schottky diode and provides a lower forward voltage drop, resulting in higher conversion efficiency. In addition, low quiescent battery current and variable frequency operation result in high efficiency even at light loads. The ML4872ES-3 requires only one inductor and two capacitors to build a very small regulator circuit capable of achieving conversion efficiencies approaching 90%.
The SHDN input of ML4872ES-3 allows the user to stop the regulator from switching and powers down the control circuitry.
ML4872ES-3 Data Sheet
