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LT3083EQ#PBF

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仕様・特性

LT3083 Adjustable 3A Single Resistor Low Dropout Regulator DESCRIPTION FEATURES Outputs May be Paralleled for Higher Current and Heat Spreading n Output Current: 3A n Single Resistor Programs Output Voltage n 50µA Set Pin Current: 1% Initial Accuracy n Output Adjustable to 0V n Low Output Noise: 40µV RMS (10Hz to 100kHz) n Wide Input Voltage Range: 1.2V to 23V (DD-Pak and TO-220 Packages) n Low Dropout Voltage: 310mV n <1mV Load Regulation n <0.001%/V Line Regulation n Minimum Load Current: 1mA n Stable with Minimum 10µF Ceramic Capacitor n Current Limit with Foldback and Overtemperature Protection n Available in 16-Lead TSSOP 12-Lead 4mm × 4mm , DFN, 5-Lead TO-220 and 5-Lead Surface Mount DD-PAK Packages n APPLICATIONS n n n n n High Current All Surface Mount Supply High Efficiency Linear Regulator Post Regulator for Switching Supplies Low Parts Count Variable Voltage Supply Low Output Voltage Power Supplies The LT®3083 is a 3A low dropout linear regulator that can be paralleled to increase output current or spread heat on surface mounted boards. Architected as a precision current source and voltage follower, this new regulator finds use in many applications requiring high current, adjustability to zero, and no heat sink. The device also brings out the collector of the pass transistor to allow low dropout operation—down to 310mV—when used with multiple supplies. A key feature of the LT3083 is the capability to supply a wide output voltage range. By using a reference current through a single resistor, the output voltage is programmed to any level between zero and 23V (DD-PAK and TO-220 packages). The LT3083 is stable with 10µF of capacitance on the output, and the IC is stable with small ceramic capacitors that do not require additional ESR as is common with other regulators. Internal protection circuitry includes current limiting and thermal limiting. The LT3083 is offered in the 16-lead TSSOP (with an exposed pad for better thermal characteristics), 12-lead 4mm × 4mm DFN (also with an exposed pad), 5-lead TO-220, and 5-lead surface mount DD-PAK packages. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATION Set Pin Current Distribution 1.5V to 0.9V at 3A Supply (Using 3.3V VCONTROL) VCONTROL 3.3V N = 1052 4.7µF VCONTROL VIN 1.5V IN 10µF LT3083 OUT 10µF SET 3083 TA01a RSET 18.2k 1% 0.1µF *RMIN 909Ω VOUT = 0.9V IMAX = 3A *OPTIONAL FOR MINIMUM 1mA LOAD REQUIREMENT 49 49.5 50 50.5 SET PIN CURRENT DISTRIBUTION (µA) 51 3083 TA01b 3083fa 1

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