Description

The MT5070 family devices provide a powersupply solution for products powered by either a single, two or three-cell Alkaline, NiCd or NiMH, or one-cell Li-Ion or Li-polymer battery. Available output current depends on the input-to-output voltage ratio. The step-up converter is based on current–mode pulse-width-modulation (PWM) control using synchronous rectification to obtain maximum efficiency with the minimum quiescent

current. The output voltage is programmable using an external resistor divider, or is fixed 2.7V/3.3V/5.0V internally on the chip. The converter can be switched off to minimize battery drain in shutdown. In shutdown, the MT5070 connects the battery input to the output, allowing the input battery to be used as a backup or realtime clock supply when the converter is off. The devices are offered in a small 6-pin SOT23-6 package.

Features

⚫ Up to 92% Efficiency

⚫ 12μA Quiescent Current

⚫ Startup with 0.9V Minimum Input Voltage

⚫ Operating Input Voltage from 0.9V to 5V

⚫ Maximum Switch Current 450mA

⚫ VIN ≥ VOUT Pass-Through Operation with the Fixed VOUT Parts

⚫ VOUT Pulled to VIN in Shutdown

⚫ Adjustable Output Voltage from 2.5V to 5.5V

⚫ Fixed 2.7V, 3.3V and 5.0V Output Voltage

⚫ Input Under-voltage Lockout

⚫ Pb-Free (ROHS compliant)

⚫ Small 6-pin SOT23_6L Package Applications

⚫ Battery Powered 

Applications:

- 1 to 3 Cell Alkaline, NiCd or NiMH

- 1 cell Li-lon

⚫ Solar or Fuel Cell Powered Applications

⚫ Consumer and Portable Medical Products

⚫ Personal Care Products