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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.
A7111 Datasheet
