Products
LT3570
PRODUCTION1.5A Buck Converter, 1.5A Boost Converter and LDO Controller
- Part Models
- 8
- 1ku List Price
- Starting From $4.07
Viewing:
Overview
- 2.5V to 36V Input Voltage Range
- Programmable Switching Frequency from 500kHz to 2.1MHz
- Synchronizable Up to 2.75MHz
- VOUT(MIN): 0.8V
- Independent Soft-Start for Each Converter
- Separate VIN Supplies for Each Converter
- Duty Cycle Range: 0% to 90% at 1MHz
- Available in 24-Lead (4mm × 4mm) QFN and 20-Lead TSSOP Packages
The LT3570 is a buck and boost converter with internal power switches and LDO controller. Each converter is designed with a 1.5A current limit and an input range from 2.5V to 36V, making the LT3570 ideal for a wide variety of applications. Switching frequencies up to 2.1MHz are programmed with an external timing resistor and the oscillator can be synchronized to an external clock up to 2.75MHz.
The LT3570 features a programmable soft-start function that limits the feedback voltage during start-up helping prevent overshoot and limiting inrush current. The LDO controller is capable of delivering up to 10mA of base current to an external NPN transistor.
Applications
- Cable and Satellite Set-Top Boxes
- Automotive Systems
- Telecom Systems
- “Dying Gasp” Systems
- TFT LCD Displays
Documentation
Data Sheet 1
User Guide 1
Technical Articles 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LT3570EFE#PBF | 20-Lead TSSOP w/ EP | ||
| LT3570EFE#TRPBF | 20-Lead TSSOP w/ EP | ||
| LT3570EUF#PBF | 24-Lead QFN (4mm x 4mm x 0.75mm w/ EP) | ||
| LT3570EUF#TRPBF | 24-Lead QFN (4mm x 4mm x 0.75mm w/ EP) | ||
| LT3570IFE#PBF | 20-Lead TSSOP w/ EP | ||
| LT3570IFE#TRPBF | 20-Lead TSSOP w/ EP | ||
| LT3570IUF#PBF | 24-Lead QFN (4mm x 4mm x 0.75mm w/ EP) | ||
| LT3570IUF#TRPBF | 24-Lead QFN (4mm x 4mm x 0.75mm w/ EP) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Apr 6, 2022 - 22_0068 Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL |
||
| LT3570EFE#PBF | PRODUCTION | |
| LT3570EFE#TRPBF | PRODUCTION | |
| LT3570IFE#PBF | PRODUCTION | |
| LT3570IFE#TRPBF | PRODUCTION | |
|
Feb 20, 2022 - 21_0269 Addition of Alternate Assembly Site ASE Taiwan for Select LFCSP Products |
||
| LT3570EUF#PBF | PRODUCTION | |
| LT3570EUF#TRPBF | PRODUCTION | |
| LT3570IUF#PBF | PRODUCTION | |
| LT3570IUF#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Can't find the software or driver you need?
Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Circuit Monitors 1 | ||
| LTC2960 | RECOMMENDED FOR NEW DESIGNS | 36V Nano-Current Two-Input Voltage Monitor |
| Oscillators 1 | ||
| LTC6909 | PRODUCTION | 1 to 8 Output, Multiphase Silicon Oscillator with Spread Spectrum Modulation |
| Power System Management (PSM) & Sequencers 1 | ||
| LTC2974 | RECOMMENDED FOR NEW DESIGNS | 4-Channel PMBus Power System Manager Featuring Accurate Output Current Measurement |
| Protection Switches & Controllers 1 | ||
| LT4363 | RECOMMENDED FOR NEW DESIGNS | High Voltage Surge Stopper with Current Limit |
Tools & Simulations
LTspice 1
Models for the following parts are available in LTspice:
- LT3570
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Evaluation Kits
LT3570EUF Demo Board | Buck + Boost + LDO Controller, 4V to 36VIN Buck with VOUT1 = 3.3V@1A, 3.3V to 10VIN Boost with VOUT2 = 12V@275mA, 100mA LDO
Resources
Latest Discussions
No discussions on LT3570 yet. Have something to say?
Start a Discussion on EngineerZone®