A7111

AiT Semiconductor Inc. www.ait-ic.com A7111 1.5 MHZ, 1A SYNCHRONOUS PSM/PWM BUCK (STEP-DOWN) DC-DC CONVERTER DESCRIPTION FEATURES The A7111 is a constant frequency, 1.5MHz, slope compensated current mode PWM stepdown converter working under an input voltage range of 2.5V to 5.5V. This feature makes the A7111 suitable for single cell Liion battery-powered applications. The internal synchronous rectifier is desired to increase efficiency without an external Schottky diode. 100% duty cycle capability extends battery life in portable devices, while the quiescent current is 200μA at no load, and drops to < 1μA in shutdown. Pulse Skipping Mode operation increases efficiency at light loads, further extending battery life. The A7111 is offered in a low profile (1mm) 5-pin, thin SOT-23 package, and is available in an adjustable version and fixed output versions of 1.0V, 1.2V, 1.5V , 1.8V, 2.5V and 3.3V.  High Efficiency: Up to 96%  1.5MHz Constant Switching Frequency  Current Mode Operation for Excellent Line and Load Transient Response  No Schottky Diode Required  2.5V to 5.5V Input Voltage Range  1.0V,1.2V,1.5V,1.8V,2.5V and 3.3V Fixed/Adjustable Output Voltage  100% Duty Cycle in Dropout Mode  Low Quiescent Current: 200μA  Over temperature Protection  Short Circuit Protection  Shutdown Quiescent Current < 1μA  Available in SOT-25 and DFN6(2x2) package APPLICATION The A7111 is available in SOT-25 and DFN6(2x2) Package. ORDER INFORMATION Package Type Part Number ...