Datasheet LT3083 (Analog Devices)
| Fabricante | Analog Devices |
| Descripción | Adjustable 3A Single Resistor Low Dropout Regulator |
| Páginas / Página | 28 / 1 — FEATURES. DESCRIPTION. Outputs May be Paralleled for Higher Current and. … |
| Revisión | B |
| Formato / tamaño de archivo | PDF / 1.1 Mb |
| Idioma del documento | Inglés |
FEATURES. DESCRIPTION. Outputs May be Paralleled for Higher Current and. Heat Spreading. Output Current: 3A
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LT3083 Adjustable 3A Single Resistor Low Dropout Regulator
FEATURES DESCRIPTION
n
Outputs May be Paralleled for Higher Current and
The LT®3083 is a 3A low dropout linear regulator that can
Heat Spreading
be paralleled to increase output current or spread heat n
Output Current: 3A
on surface mounted boards. Architected as a precision n
Single Resistor Programs Output Voltage
current source and voltage fol ower, this new regulator n
50µA Set Pin Current: 1% Initial Accuracy
finds use in many applications requiring high current, n
Output Adjustable to 0V
adjustability to zero, and no heat sink. The device also n
Low Output Noise: 40µVRMS (10Hz to 100kHz)
brings out the collector of the pass transistor to allow n
Wide Input Voltage Range: 1.2V to 23V
low dropout operation—down to 310mV—when used
(DD-Pak and TO-220 Packages)
with multiple supplies. n
Low Dropout Voltage: 310mV
A key feature of the LT3083 is the capability to supply n <1mV Load Regulation a wide output voltage range. By using a reference cur- n <0.001%/V Line Regulation rent through a single resistor, the output voltage is pro- n Minimum Load Current: 1mA grammed to any level between zero and 23V (DD-PAK n Stable with Minimum 10µF Ceramic Capacitor and TO-220 packages). The LT3083 is stable with 10µF of n Current Limit with Foldback and Overtemperature capacitance on the output, and the IC is stable with small Protection ceramic capacitors that do not require additional ESR as n Available in 16-Lead TSSOP, 12-Lead 4mm × 4mm is common with other regulators. DFN, 5-Lead TO-220 and 5-Lead Surface Mount DD-PAK Packages Internal protection circuitry includes current limiting and thermal limiting. The LT3083 is offered in the 16-lead
APPLICATIONS
TSSOP (with an exposed pad for better thermal char- n High Current All Surface Mount Supply acteristics), 12-lead 4mm × 4mm DFN (also with an n High Efficiency Linear Regulator exposed pad), 5-lead TO-220, and 5-lead surface mount n Post Regulator for Switching Supplies DD-PAK packages. n Low Parts Count Variable Voltage Supply All registered trademarks and trademarks are the property of their respective owners. n Low Output Voltage Power Supplies
TYPICAL APPLICATION Set Pin Current Distribution 1.5V to 0.9V at 3A Supply (Using 3.3V VCONTROL)
N = 1052 VCONTROL 3.3V 4.7µF VCONTROL V LT3083 V IN IN OUT OUT = 0.9V 1.5V IMAX = 3A 10µF SET 10µF R * MIN 3083 TA01a 909Ω *OPTIONAL FOR MINIMUM 1mA LOAD RSET REQUIREMENT 18.2k 0.1µF 1% 49 49.5 50 50.5 51 SET PIN CURRENT DISTRIBUTION (µA) 3083 TA01b Rev. B Document Feedback For more information www.analog.com 1 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Pin Functions Block Diagram Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
FEATURES DESCRIPTION
n
Outputs May be Paralleled for Higher Current and
The LT®3083 is a 3A low dropout linear regulator that can
Heat Spreading
be paralleled to increase output current or spread heat n
Output Current: 3A
on surface mounted boards. Architected as a precision n
Single Resistor Programs Output Voltage
current source and voltage fol ower, this new regulator n
50µA Set Pin Current: 1% Initial Accuracy
finds use in many applications requiring high current, n
Output Adjustable to 0V
adjustability to zero, and no heat sink. The device also n
Low Output Noise: 40µVRMS (10Hz to 100kHz)
brings out the collector of the pass transistor to allow n
Wide Input Voltage Range: 1.2V to 23V
low dropout operation—down to 310mV—when used
(DD-Pak and TO-220 Packages)
with multiple supplies. n
Low Dropout Voltage: 310mV
A key feature of the LT3083 is the capability to supply n <1mV Load Regulation a wide output voltage range. By using a reference cur- n <0.001%/V Line Regulation rent through a single resistor, the output voltage is pro- n Minimum Load Current: 1mA grammed to any level between zero and 23V (DD-PAK n Stable with Minimum 10µF Ceramic Capacitor and TO-220 packages). The LT3083 is stable with 10µF of n Current Limit with Foldback and Overtemperature capacitance on the output, and the IC is stable with small Protection ceramic capacitors that do not require additional ESR as n Available in 16-Lead TSSOP, 12-Lead 4mm × 4mm is common with other regulators. DFN, 5-Lead TO-220 and 5-Lead Surface Mount DD-PAK Packages Internal protection circuitry includes current limiting and thermal limiting. The LT3083 is offered in the 16-lead
APPLICATIONS
TSSOP (with an exposed pad for better thermal char- n High Current All Surface Mount Supply acteristics), 12-lead 4mm × 4mm DFN (also with an n High Efficiency Linear Regulator exposed pad), 5-lead TO-220, and 5-lead surface mount n Post Regulator for Switching Supplies DD-PAK packages. n Low Parts Count Variable Voltage Supply All registered trademarks and trademarks are the property of their respective owners. n Low Output Voltage Power Supplies
TYPICAL APPLICATION Set Pin Current Distribution 1.5V to 0.9V at 3A Supply (Using 3.3V VCONTROL)
N = 1052 VCONTROL 3.3V 4.7µF VCONTROL V LT3083 V IN IN OUT OUT = 0.9V 1.5V IMAX = 3A 10µF SET 10µF R * MIN 3083 TA01a 909Ω *OPTIONAL FOR MINIMUM 1mA LOAD RSET REQUIREMENT 18.2k 0.1µF 1% 49 49.5 50 50.5 51 SET PIN CURRENT DISTRIBUTION (µA) 3083 TA01b Rev. B Document Feedback For more information www.analog.com 1 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Pin Functions Block Diagram Applications Information Typical Applications Package Description Revision History Typical Application Related Parts