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MPQ4458 Datasheet(PDF) 1 Page - Monolithic Power Systems |
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MPQ4458 Datasheet(HTML) 1 Page - Monolithic Power Systems |
1 / 16 page MPQ4458 Industrial Grade ,1A, 4MHz, 36V Step-Down Converter MPQ4458 Rev. 1.0 www.MonolithicPower.com 1 12/5/2012 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2012 MPS. All Rights Reserved. The Future of Analog IC Technology DESCRIPTION The MPQ4458 is a high frequency step-down switching regulator with an integrated internal high-side high voltage power MOSFET. It provides 1 A output with current mode control for fast loop response and easy compensation. The wide 3.8V to 36V input range accommodates a variety of step-down applications, including those in automotive systems. A 120µA operational quiescent current is suitable for use in battery-powered applications. The frequency foldback helps prevent inductor current runaway during startup and thermal shutdown provides reliable, fault tolerant operation. By switching at 4MHz, the MPQ4458 prevents EMI (Electromagnetic Interference) noise problems, such as those found in AM radio and ADSL applications. The MPQ4458 is available in thin 10-pin 3mm x 3mm TQFN package. FEATURES • Guaranteed Industrial Temp Range • 120μA Quiescent Current • Wide 3.8V to 36V Operating Input Range • 300mΩ Internal Power MOSFET • Up to 4MHz Programmable Switching Frequency • Ceramic Capacitor Stable • Internal Soft-Start • Precision Current Limit without a Current Sensing Resistor • Up to 95% Efficiency • Output Adjustable from 0.8V to 30V • Available in 10-Pin 3x3 TQFN Package APPLICATIONS • High Voltage Power Conversion • Automotive Systems • Industrial Power Systems • Distributed Power Systems • Battery Powered Systems All MPS parts are lead-free and adhere to the RoHS directive. For MPS green status, please visit MPS website under Quality Assurance. “MPS” and “The Future of Analog IC Technology” are Registered Trademarks of Monolithic Power Systems, Inc. TYPICAL APPLICATION MPQ4458 COMP FB FREQ EN 4 5 7 3 VIN GND SW BST 8, 9 6 1, 2 10 VOUT 5V @ 1A VIN 36V Max CONTROL C3 150pF C6 NS 10MQ100N C4 100nF C2 22 ∝F L1 2.2 ∝H 100 90 80 70 60 50 40 30 20 0 500 1000 LOAD CURRENT (mA) Efficiency vs Load Current VO=3.3V VI=5V VI=12V VI=24V |
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