MAX1954EUB+

The MAX1954EUB+ is a low cost, high frequency, current mode PWM buck controller in 10 pin µMAX package. The drain-voltage range on high-side FET is 3V to 13.2V and is independent of the supply voltage. It operates at a fixed 300KHz switching frequency and can be used to provide up to 25A of output current with high efficiency. The output voltage is adjustable from 0.8V to 0.86VHSD. It is designed to drive a pair of external N-channel power MOSFETs in a synchronous buck topology to improve efficiency and cost compared with a P-channel power MOSFET topology. It is used in graphic cards and video cards, microprocessor core supply, low-voltage distributed power, telecommunications and networking.

• Supply voltage range is 3V to 13.2V
• Operating temperature range from -40°C to 85°C
• Low-cost current-mode controllers, fixed frequency PWM
• Efficiency of 93%
• No current-sense resistor needed
• Internal digital soft-start, soft-start period is 3.4ms
• Thermal overload protection
• Maximum quiescent supply current is 2mA, maximum standby supply current is 350µA
• Minimum duty cycle of 5.5%(max) measured at DH
• Maximum duty cycle of 96% measured at DH

Uwagi

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