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IMP37 Datasheet(PDF) 1 Page - IMP, Inc |
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IMP37 Datasheet(HTML) 1 Page - IMP, Inc |
1 / 6 page © 1999 IMP, Inc. 408-432-9100/www.impweb.com 1 Key Features Applications x High-efficiency linear power supplies x Post regulator for switching supplies x 5V to 3.3V linear regulators x USB hubs x Battery chargers x Routers, ISDN/DSL modems x Low Dropout Voltage – 0.8V maximum at 100mA – 0.95V maximum at 800mA – 20% lower dropout voltage than “1117” LDO regulators x Guaranteed Low Dropout Voltage at Multiple Current Levels x 1% Trimmed 2.5V, 3.0V and 3.3V Outputs x Reduced Quiescent Current: 75µA Maximum x Short Circuit and Thermal Protection x Space Saving SOT-223 Surface Mount Package x “1117” Pin Compatible Block Diagram – + + – 37_01.eps GND 1 Ref IMP37 Thermal Protection Error Amp Current Limit 2 Input 3 Out (Tab) RCS + – IMP3 IMP377 POWER MANAGEMENT Lo Low Dr w Dropout P opout Positiv ositivee V Volt oltag age R e Regulat egulator orss – 800mA – 800mA – 2.5V – 2.5V, 3.0V and 3.3V Output , 3.0V and 3.3V Output The IMP37 series of Low Dropout (LDO) three-terminal voltage regula- tors feature guaranteed low dropout voltages at currents up to 0.8A. The IMP37 regulator family dropout voltage is guaranteed to be 0.95V or lower at 0.8A. At 100mA, the maximum dropout voltage is 0.8V. Compared with “1117” type LDOs, the IMP37 has a 20% lower dropout voltage. Three fixed output voltages are offered: 2.5V, 3.0V and 3.3V. Output volt- ages are factory trimmed to within 1% of the nominal value. In addition to low dropout voltages, the IMP37 family features greatly reduced quiescent operating current. The 75 µA maximum specification represents an over 100 times improvement over competitive devices. Devices are short circuit protected, and a thermal protection circuit shuts the regulator off should the junction temperature exceed 165°C. The IMP37 is available in low-profile plastic SOT-223 and TO-263 packages and are pin compatible with fixed “1117” devices. |
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