LM3489MM

switching regulator controller, MSOP, -0.3V to 36V

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Price:: US $0.10~3.00 / piece [Get Latest Price]

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PartNumber:: LM3489MM

Brand:: National Semiconductor - NS | Pack: MSOP | D/C: 10+

Availability:: Supply Ability: 10000/Week Can Ship Immediately
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Products Upload time: 2011-07-26

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Part Number:LM3489MM
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Product Summary

The LM3489MM is a high efficiency PFET switching regulator controller that can be used to quickly and easily develop a small, cost effective, switching buck regulator for a wide range of applications. The hysteretic control architecture of LM3489MM provides for simple design without any control loop stability concerns using a wide variety of external components. The PFET architecture also allows for low component count as well as ultra-low dropout, 100% duty cycle operation. Another benefit is high efficiency operation at light loads without an increase in output ripple. A dedicated Enable Pin of LM3489MM provides a shutdown mode drawing only 7μA. Leaving the Enable Pin unconnected defaults to on.

Parametrics

LM3489MM absolute maximum ratings: (1)VIN Voltage: -0.3V to 36V; (2)PGATE Voltage: -0.3V to 36V; (3)FB Voltage: -0.3V to 5V; (4)ISENSE Voltage: -1.0V to 36V, -1V (<100ns); (5)ADJ Voltage: -0.3V to 36V; (6)EN Voltage: -0.3V to 6V; (7)Maximum Junction Temp: -150℃; (8)Power Dissipation, TA = 25℃: 417mW; (9)ESD Susceptibilty Human Body Model: 2kV; (10)Lead Temperature: Vapor Phase (60 sec.) 215℃, Infared (15 sec.) 220℃; (11)Storage Temperature: -65℃ to 150℃.

Features

LM3489MM features: (1)Easy to use control methodology; (2)No control loop compensation required; (3)Wide 4.5V to 35V input range; (4)1.239V to VIN adjustable output range; (5)High efficiency 93%; (6)±1.3% (±2% over temp) internal reference; (7)100% duty cycle operation; (8)Maximum operation frequency > 1MHz; (9)Current limit protection; (10)Dedicated enable pin (on if unconnected); (11)Shutdown mode draws only 7μA supply current; (12)MSOP-8.