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AIC3415

700mA, 1.2MHz Synchronous Step-Up Converter

FEATURES
  • VIN Start Up Voltage: 0.9V
  • Output Voltage Range: from 2.7V to 5.25V.
  • Up to 94% Efficiency
  • 1.2MHz Fixed Frequency Switching
  • Built-in current mode compensation
  • Built-in Protection: Over Current, Over Voltage, Over Temperature
  • Optional Automatic PWM/PSM Version (AIC3415) and Forced PWM Version (AIC3415A).
  • Logic Controlled Shutdown: < 1μA
  • Output Disconnect by Shutdown Function
  • Built-in Soft Start
  • Active Anti-ringing Control
  • Small SOT23-6 Package
APPLICATIONS
  • Single/Dual Cells Ni-Cd/Ni-Mh/Li-Lon Type Battery
  • Operated Products
  • Wireless Mice
  • PDA
  • Digital Still Cameras
  • Portable Equipment
DESCRIPTION
The AIC3415 is a synchronous step-up DC/DC converter.
There are two options for AIC3415: automatic PWM/PSM version (AIC3415), and forced PWM version (AIC3415A). The automatic PWM/PSM version enters PSM from PWM automatically when load decreases. The goal is to improve efficiency and reduce quiescent current; the forced PWM version keeps the same operating frequency even when it operates in light load. This guarantees low output ripple and noise.
The AIC3415 provides a complete power supply solution for products powered by one or two Alkaline, Ni-Cd, Ni-MH or Li-Lon battery cells. It stays in operation with supply voltages down to 0.5V. The implemented boost converter uses an internal synchronous rectifier to obtain maximum efficiency.
A low-EMI mode is implemented to reduce ringing and in effect lower radiated electromagnetic energy when the converter enters the discontinuous conduction mode.
TYPICAL APPLICATION


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