AiT Semiconductor Inc.
www.
ait-ic.
com
A7210
PWM/PFM STEP-DOWN DC-DC CONVERTER
DESCRIPTION
The A7210 is a
CMOS-based PWM step-down DC-DC Controller.
The device offers the following advantages: lower supply current and wider operating input-
voltage range.
The A7210 consists of an oscillator, a PWM control circuit, a reference
voltage unit, an error amplifier, a soft-start circuit, a protection circuit, a PWM/PFM alternative circuit, a Chip Enable circuit, and under
voltage lockout circuit.
A low ripple, high efficiency step-down DC-DC converter can be easily composed of this IC.
Output
Voltage can be adjusted with external resistors.
The A7210 uses
voltage type PWM/PFM mixed operation mode.
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