AT1366
Preliminary Product Information
1MHz,800mA Synchronous Buck Controller

Features
• High efficiency (95%) possible
• No Schottky Diode Required
• 800mA Output Current at 5V input 3.3V output
• Oscillation frequency 1.0MHz
• Built-in ON/OFF Function
• Low Dropout Operation: 100% Duty Cycle
• Stand-by current max. 1µA
• Input voltage: 2.5V ~5.5V

Applications
• Power Supply for portable devices
General Description
The AT1366 provides complete control for a
DC/DC converter optimized for high-performance
microprocessor applications. It is operated on
current mode architecture for excellent line and
load transient response. 1MHz operation frequency
is allowing the use of small surface mount inductor
and capacitor. The internal synchronous switch
increases efficiency and eliminates the need for an
external Schottky diode. The AT1366 is a family
of low-noise synchronous step-down DC/DC
converters that is ideally suited for systems
powered from a 1-cell Li-ion battery or from a
3-cell to 4-cell NiCd, NiMH, or alkaline battery. It
can also be used to USB-Based power system.


Block Diagram


Aimtron reserves the right without notice to change this circuitry and specifications.


2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879 Email: service@aimtron.com.tw
05/04/21
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