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EZ1580CM-X.X.TR Datasheet(PDF) 1 Page - Semtech Corporation |
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EZ1580CM-X.X.TR Datasheet(HTML) 1 Page - Semtech Corporation |
1 / 6 page 1 www.semtech.com EZ1580/EZ1581 EZ1582/EZ1583 Dual Input Low Dropout Regulator POWER MANAGEMENT June 23, 2010 The EZ158X family of high performance positive voltage regulators are designed for use in applications requiring very low dropout voltage at up to 7, 5, 3 and 1.5 amps. Capable of supplying up to 2.8V on boards where both 5V and 3.3V supplies are available, the superior dropout characteristics of the EZ158X result in reduced heat dissipation compared to regular LDOs. This allows for heatsink size reduction or elimination. Additionally, the EZ158X provides excellent regulation over variations in line, load and temperature. Remote sense operation allows compensating for trace, connector and other resistive losses. Outstanding features include very low dropout performance at rated current, fast transient response, remote sense, internal current limiting, thermal shutdown and safe operating area protection of the output device. The EZ158X is a five terminal adjustable or fixed 2.5V voltage regulator available in the popular 5 pin TO-220 and TO-263 plastic packages. 540mV dropout @ 7A in dual supply mode (EZ1580) Remote sense operation Fast transient response 0.5% initial accuracy Line regulation typically 0.08% Load regulation typically 0.08% 5 Pin TO-220 and TO-263 packages Microprocessor supplies Split plane microprocessor supplies Advanced graphics cards Sound cards Low voltage logic supplies Switching power supply post regulation Notes: (1) Capacitor values are for reference only. Good quality, low ESR tantalum or aluminum electrolytic capacitors should be used. Increasing the value of the output capacitor will improve the overall transient response. (2) If the same voltage is input to both PWR and CTL, then the dropout voltage will become 1.3V maximum. (3) A small (~0.033µF) capacitor can be used to bypass the ADJ pin to improve transient response, if needed. 2.5V OUT 3.3V POWER IN 5V CONTROL IN GROUND GROUND C2 10uF C1 33uF C3 68uF R1 124 R2 124 U1 EZ158XCX 4 3 2 1 5 CTL OUT ADJ SNS PWR VREF 2 R I 1 R 2 R 1 V V ADJ REF OUT • + + = GROUND GROUND 3.3V POWER IN 2.5V OUT 5V CONTROL IN C2 10uF U1 EZ158XCX-2.5 4 3 2 1 5 CTL OUT GND SNS PWR C3 68uF C1 33uF Adjustable Output Parts(3) Fixed Output Parts Description Features Applications Typical Application Circuits |
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