Product Overview
The LT®3045 is a high performance low dropout linear regulator featuring LTC’s ultralow noise and ultrahigh 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.
This blog will introduce LT3045 systematically from its features, pinout to its specifications, applications, also including LT3045 datasheet and so much more.
Catalog
LT3045 Features
- Ultralow RMS Noise: 0.8µVRMS (10Hz to 100kHz)
- Ultralow Spot Noise: 2nV/√Hz at 10kHz
- Ultrahigh PSRR: 76dB at 1MHz
- Output Current: 500mA
- Wide Input Voltage Range: 1.8V to 20V
- Single Capacitor Improves Noise and PSRR
- 100µA SET Pin Current: ±1% Initial Accuracy
- Single Resistor Programs Output Voltage
- High Bandwidth: 1MHz
- Programmable Current Limit
- Low Dropout Voltage: 260mV
- Output Voltage Range: 0V to 15V
- Programmable Power Good
- Fast Start-Up Capability
- Precision Enable/UVLO
- Parallelable for Lower Noise and Higher Current
- Internal Current Limit with Foldback
- Minimum Output Capacitor: 10µF Ceramic
- Reverse-Battery and Reverse-Current Protection
- 12-Lead MSOP and 10-Lead 3mm × 3mm DFN Packages
- AEC-Q100 Qualified for Automotive Applications
LT3045 Applications
- RF Power Supplies: PLLs, VCOs, Mixers, LNAs, PAs
- Very Low Noise Instrumentation
- High Speed/High Precision Data Converters
- Medical Applications: Imaging, Diagnostics
- Precision Power Supplies
- Post-Regulator for Switching Supplies
LT3045 Pinout
The following figure is the diagram of LT3045 pinout.
LT3045 Pinout1
LT3045 Pinout2
LT3045 Advantages
The device supplies 500mA at a typical 260mV dropout voltage. Operating quiescent current is nominally 2.2mA and drops to <<1µA in shutdown. The LT3045’s wide output voltage range (0V to 15V) while maintaining unitygain 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 10µF ceramic output capacitor. Built-in protection includes reverse-battery protection, reverse-current protection, internal current limit with foldback and thermal limit with hysteresis. The LT3045 is available in thermally enhanced 12-Lead MSOP and 10-Lead 3mm × 3mm DFN packages.
LT3045 Typical Applications
The following figures shows the typical applications of LT3045, which shows the compact solution dimensions.
LT3045 Typical Applications
Power Supply Ripple Rejection
LT3045 Block Diagram
The following figure shows the block diagram of LT3045.
LT3045 Block Diagram
LT3045 Packaging Dimension
The following figure shows packaging dimension of LT3045.
LT3045 Packaging Dimension
LT3751 Specification
| Manufacturer: | Analog Devices Inc |
| Dropout Voltage1-Max: | 0.45 V |
| Length: | 3 mm |
| Operating Temperature TJ-Max: | 125 °C |
| Output Current1-Max: | 0.5 A |
| Output Voltage1-Max: | 15 V |
| Seated Height-Max: | 0.8 mm |
| Terminal Pitch: | 0.45 mm |
| Width: | 3 mm |
| Terminal Position: | DUAL |
LT3045 Manufacturer
Linear Technology and Analog Devices have joined together. Analog Devices is a world leader in the design, manufacture, and marketing of a broad portfolio of high performance analog, mixed-signal, and digital signal processing (DSP) integrated circuits (ICs) used in virtually all types of electronic equipment.
LT3045 Datasheet
You can download this datasheet for LT3045–Datasheet from the link given below:
Using Warnings
Note: Please check their parameters and pin configuration before replacing them in your circuit.
LT3045 FAQ
What can the lt3045 LDO regulator be used for?
The LT3045 was designed for noise sensitive power supply applications found in instrumentation, test, and medical designs.
What kind of linear regulator does LTC use?
The LT3045 is a high performance low dropout linear regulator featuring LTC’s ultralow noise and ultrahigh PSRR architecture for powering noise sensitive applications.
What is the voltage range of the lt3045?
The LT3045’s wide output voltage range (0V to 15V) while maintaining unity- gain operation provides virtually constant output noise, PSRR, bandwidth and load regulation, independent of the programmed output voltage.
How does a low dropout regulator work?
Low-dropout regulators are distinguished by their ability to maintain regulation with small differences between supply voltage and load voltage. For example, as a lithium-ion battery drops from 4.2 V (fully charged) to 2.7 V (almost discharged), an LDO can maintain a constant 2.5 V at the load.
What does low dropout voltage mean?
LDO, which stands for Low Dropout, can operate at a low potential difference between input and output. Although there are no strict numerical definitions regarding the potential difference between the input and output of an LDO, generally the lowest voltage at which the regulator can operate stably is less than 1V.
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