AIC3413
400mA, 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 (AIC3413) and Forced PWM Version (AIC3413A).
- 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 AIC3413 is a synchronous step-up DC/DC converter.
There are two options for AIC3413: automatic PWM/PSM version (AIC3413), and forced PWM version (AIC3413A). 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 AIC3413 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
