A7210 Datasheet | AiT Semiconductor

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 posed of this IC. Output Voltage can be adjusted with external resistors. The A7210 uses voltage type PWM/PFM mixed operation mode. When the load current is small, the operation will switch into the PFM mode from PWM mode. Therefore the efficiency at small load is improved, and then the chip works on PWM mode. The A7210 embeds reset type protection circuit. If the term of maximum duty cycle keeps on a certain time, the protection circuit restarts the operation with soft-start and repeat this operation until maximum duty cycle condition is released. When the cause of large load current is removed, the chip returns to normal condition. The A7210 is available in SOT-25 Package. FEATURES - Range of Input Voltage: 3V ~ 16V - Built-in Soft-start Function and Protection Function(Reset type protection) - <1μA Shutdown Current and 80u A Quiescent Current - Oscillation Frequency: 500KHz - High efficiency: 95% - High Accuracy Output Voltage:±2.0% - Low Temperature Coefficient: ±100ppm/°C - Operating Temperature Range: -40°C ~ 85°C - Available in SOT-25 Package APPLICATION - Power source for hand-held munication equipment, cameras, video instruments such as VCRs, camcorders - Power source for battery-powered equipment - Power source for household electrical appliance ORDERING INFORMATION Package Type Part Number SOT-25 A7210E5R E5 A7210E5VR Note R: Tape & Reel V: Green Package Ai T provides all Pb free products Suffix “ V “ means Green Package TYPICAL APPLICATION REV1.0 - JUN 2011 RELEASED -...