LT3045 20 V 500 mA Ultra-Low Noise LDO Regulator

Analog Devices PMIC for noise sensitive power supplies found in instrumentation, test, and medical applications

Image of Analog Devices' LT3045 20 V 500 mA Ultralow Noise LDO Regulator Analog Devices' LT3045 is a 20 V, 500 mA low dropout (LDO) regulator. This regulator features ultra-low noise and ultra-high PSRR architecture for powering noise sensitive applications. Designed as a precision current reference followed by a high-performance voltage buffer, the LT3045 can be easily paralleled to further reduce noise, increase output current and spread heat on the PCB.

The device supplies 500 mA at a typical 260 mV dropout voltage. Operating quiescent current is nominally 2.2 mA and drops to <1 μA in shutdown. This regulator's wide output voltage range (0 V to 15 V) while maintaining unity gain operation provides virtually constant output noise, PSRR, bandwidth and load regulation, independent of the programmed output voltage. Additionally, the regulator features programmable current limit, fast start-up capability, and programmable power good to indicate output voltage regulation.

The LT3045 is stable with a minimum 10 μF ceramic output capacitor. Built-in protection includes reverse-battery protection, reverse-current protection, internal current limit with foldback, and thermal limit with hysteresis. The regulator comes in a 10- and 12-pin DFN package as well as 12-pin MOSP package. The LT3045 was designed for noise sensitive power supply applications found in instrumentation, test, and medical designs.

Typical Applications Chart

Image of Analog Devices' LT3045 Typical Applications

Image of Analog Devices' LT3045 Typical Applications

Features
  • Programmable current limit
  • Reverse-battery and reverse-current protection
  • Fast start-up capability
  • Voltage input: 20 V max
  • Voltage output: 0 V to 15 V
  • Low dropout voltage: 260 mV
  • Current output: 500 mA
  • Temperature operating range: -40°C to +125°C/150°C
  • Package/case: 10-DFN, 12-DFN, 12-MSOP, 12-MSOP-EP
Applications
  • RF power supplies: PLLs, VCOs, mixers, LNAs, PAs
  • Instrumentation
  • High speed/high precision data converters
  • Medical applications
  • Imaging
  • Diagnostics
  • Power supplies
  • Switching supplies

Eval Boards

ImageManufacturer Part NumberDescriptionUtilized IC / PartAvailable QuantityView Details
DEMO BOARD FOR LT3045DC2491ADEMO BOARD FOR LT3045LT304566 - ImmediateView Details
LT3045EDD-1 DEMO BOARD 20V, 500MDC2593ALT3045EDD-1 DEMO BOARD 20V, 500MLT3045-17 - ImmediateView Details

LT3045 LDO Regulator

ImageManufacturer Part NumberDescriptionMounting TypePackage / CaseSupplier Device PackageAvailable QuantityView Details
IC REG LIN POS PROG 500MA 12DFNLT3045EDD-1#TRPBFIC REG LIN POS PROG 500MA 12DFNSurface Mount12-WFDFN Exposed Pad12-DFN (3x3)0View Details
IC REG LIN POS PROG 500MA 12MSOPLT3045HMSE#PBFIC REG LIN POS PROG 500MA 12MSOPSurface Mount12-TSSOP (0.118", 3.00mm Width) Exposed Pad12-MSOP-EP519 - ImmediateView Details
IC REG LIN POS PROG 500MA 10DFNLT3045EDD#PBFIC REG LIN POS PROG 500MA 10DFNSurface Mount10-WFDFN Exposed Pad10-DFN (3x3)0View Details
IC REG LIN POS PROG 500MA 10DFNLT3045EDD#TRPBFIC REG LIN POS PROG 500MA 10DFNSurface Mount10-WFDFN Exposed Pad10-DFN (3x3)0View Details
IC REG LIN POS PROG 500MA 12MSOPLT3045EMSE#TRPBFIC REG LIN POS PROG 500MA 12MSOPSurface Mount12-TSSOP (0.118", 3.00mm Width) Exposed Pad12-MSOP-EP0View Details
IC REG LIN POS PROG 500MA 12MSOPLT3045EMSE-1#PBFIC REG LIN POS PROG 500MA 12MSOPSurface Mount12-TSSOP (0.118", 3.00mm Width) Exposed Pad12-MSOP-EP2120 - ImmediateView Details
IC REG LIN POS PROG 500MA 12MSOPLT3045EMSE-1#TRPBFIC REG LIN POS PROG 500MA 12MSOPSurface Mount12-TSSOP (0.118", 3.00mm Width) Exposed Pad12-MSOP-EP0View Details
IC REG LIN POS PROG 500MA 10DFNLT3045HDD#PBFIC REG LIN POS PROG 500MA 10DFNSurface Mount10-WFDFN Exposed Pad10-DFN (3x3)0View Details
IC REG LIN POS PROG 500MA 10DFNLT3045HDD#TRPBFIC REG LIN POS PROG 500MA 10DFNSurface Mount10-WFDFN Exposed Pad10-DFN (3x3)0View Details
IC REG LIN POS PROG 500MA 10DFNLT3045IDD#TRPBFIC REG LIN POS PROG 500MA 10DFNSurface Mount10-WFDFN Exposed Pad10-DFN (3x3)0View Details
IC REG LIN POS PROG 500MA 12DFNLT3045IDD-1#TRPBFIC REG LIN POS PROG 500MA 12DFNSurface Mount12-WFDFN Exposed Pad12-DFN (3x3)0View Details
IC REG LIN POS PROG 500MA 12MSOPLT3045IMSE#TRPBFIC REG LIN POS PROG 500MA 12MSOPSurface Mount12-TSSOP (0.118", 3.00mm Width) Exposed Pad12-MSOP-EP0View Details
IC REG LIN POS PROG 500MA 12MSOPLT3045IMSE-1#PBFIC REG LIN POS PROG 500MA 12MSOPSurface Mount12-TSSOP (0.118", 3.00mm Width) Exposed Pad12-MSOP-EP0View Details
IC REG LIN POS PROG 500MA 12MSOPLT3045IMSE-1#TRPBFIC REG LIN POS PROG 500MA 12MSOPSurface Mount12-TSSOP (0.118", 3.00mm Width) Exposed Pad12-MSOP-EP0View Details
Published: 2018-02-01