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5.5V/1A, 1.5MHz Sync. Step-dow Converter
AS1301
The AS1301 is a high-efficiency monolithic synchronous buck regulator using a constant frequency, current mode architecture. The device is available in an adjustable version. Supply current with no load is 40uA and drops to <1uA in shutdown. The 2.5V to 5.5V input voltage range makes the AS1301 ideally suited for single Li-lon battery powered applications. 100% duty cycle provides low dropout operation, extending battery life in portable systems. PWM/PFM mode operation provides very low output ripple voltage for noise sensitive applications. Switching frequency is internally set at 1.5MHz, allowing the use of small surface mount inductors and capacitors. Low output voltages are easily supported with the 0.6V feedback reference voltage.
The AS1301 is available in a low profile SOT23-5L package.
Features
Input Voltage Range: 2.5V to 5.5V
Fixed Switching Frequency: 1.5MHz
Continuous Output Current: 1A
High Efficiency: Up to 96%
Output Adjustable from 0.6V
No Schottky Diode Required
Built-in Short Protection
Built-in Over Current Limit
Built-in Over Voltage Protection
PFM Mode for High Efficiency in Light Load
Over Temperature Protected.
Low Quiescent Current: 40uA
Internal Soft-Start
-40°C to 85°C Operation Temperature
Available in SOT23-5L Package
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