LT1533
PRODUCTIONUltralow Noise 1A Switching Regulator
- Part Models
- 4
- 1ku List Price
- Starting From $7.70
Overview
- Greatly Reduced Conducted and Radiated EMI (<100µVP-P in Typical Application)
- Low Switching Harmonic Content
- Independent Control of Switch Voltage and Current Slew Rates
- Two 1A Current Limited Power Switches
- Regulates Positive and Negative Voltages
- 20kHz to 250kHz Oscillator Frequency
- Easily Synchronized to External Clock
- Wide Input Voltage Range: 2.7V to 23V
- Low Shutdown Current: 12µA Typical
- Easier Layout than with Conventional Switchers
- Outputs Can Be Forced to 50% Duty Cycle for Unregulated Applications
The LT1533 is a new class of switching regulator designed to reduce conducted and radiated electromagnetic interference (EMI). Ultralow noise and EMI are achieved by providing user control of the output switch slew rates. Voltage and current slew rates can be independently programmed to optimize switcher harmonic content versus efficiency. The LT1533 can reduce high frequency harmonic power by as much as 40dB with only minor losses in efficiency.
The LT1533 utilizes a dual output switch current mode architecture optimized for low noise topologies. The IC includes two 1A power switches along with all necessary oscillator, control and protection circuitry. Unique error amp circuitry can regulate both positive and negative voltages. The internal oscillator may be synchronized to an external clock for more accurate placement of switching harmonics. Protection features include cycle by cycle current limit protection, undervoltage lockout and thermal shutdown.
Low minimum supply voltage and low supply current during shutdown make the LT1533 well suited for portable applications. The part may also be forced into a 50% duty cycle mode for unregulated applications. The LT1533 is available in the 16-pin narrow SO package.
Applications
- Precision Instrumentation Systems
- Isolated Supplies for Industrial Automation
- Medical Instruments
- Wireless Communications
- Single Board Data Acquisition Systems
Documentation
Data Sheet 1
User Guide 1
Application Note 6
Design Note 1
Technical Articles 1
Spec Notice 1
Video 2
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 |
|---|---|---|---|
| LT1533CS#PBF | 16-Lead SOIC (Narrow 0.15 Inch) | ||
| LT1533CS#TRPBF | 16-Lead SOIC (Narrow 0.15 Inch) | ||
| LT1533IS#PBF | 16-Lead SOIC (Narrow 0.15 Inch) | ||
| LT1533IS#TRPBF | 16-Lead SOIC (Narrow 0.15 Inch) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Oct 8, 2024 - 24_0236 Migrating Bottom Trace Code Marking to Top Side Laser Marking for SOIC_N Package |
||
| LT1533CS#PBF | PRODUCTION | |
| LT1533CS#TRPBF | PRODUCTION | |
| LT1533IS#PBF | PRODUCTION | |
| LT1533IS#TRPBF | PRODUCTION | |
|
Oct 12, 2022 - 22_0252 Epoxy Change from Henkel 8290 to 8290A for 16-Lead SOIC Package |
||
| LT1533CS#PBF | PRODUCTION | |
| LT1533CS#TRPBF | PRODUCTION | |
| LT1533IS#PBF | PRODUCTION | |
| LT1533IS#TRPBF | PRODUCTION | |
|
Aug 6, 2022 - 22_0173 Laser Top Mark Conversion for SOICN14 and SOICN16 Packages Assembled on ADPG [PNG] |
||
| LT1533CS#PBF | PRODUCTION | |
| LT1533CS#TRPBF | PRODUCTION | |
| LT1533IS#PBF | PRODUCTION | |
| LT1533IS#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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LTspice
Models for the following parts are available in LTspice:
- LT1533
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
LT1533CS | Ultra Low Noise Bipolar Output DC/DC Converter, 12VIN to +/-5VOUT @ 700mA, VIN min.=10.8V, 3.5W Output
Resources
LT1533CS | Ultra Low Noise Boost Converter, 5V Input, 12VOUT @ 150mA
Resources
LT1533CS | Ultra Low Noise Bipolar Output DC/DC Converter, 5VIN to +/-5VOUT @ 350mA, VIN min.= 4.5V, 1.8W Output
Resources
LT1533CS | Ultra Low Noise Bipolar Output DC/DC Converter, 5VIN to +/-12VOUT @ 150mA, VIN min.=4.5V, 1.8W Output
Resources
LT1533CS | Ultra Low Noise Bipolar Output DC/DC Converter, 5VIN to +/-15VOUT @ 120mA, VIN min.=4.5V, 1.8W Output