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The LT®1534/LT1534-1 are a new class of switching regulator designed to reduce conducted and radiated electromag netic 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 LT1534/LT1534-1 can reduce high frequency harmonic power by as much as 40dB with only minor losses in efficiency.
The LT1534/LT1534-1 utilize a current mode architecture optimized for low noise boost topologies. The ICs include a 2A power switch 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, under voltage lockout and thermal shutdown.
Low minimum supply voltage and low supply current during shutdown make theLT1534/LT1534-1 well suited for portable applications. The LT1534/LT1534-1 are available in the 16-pin narrow SO package.
LT1534CS Maximum Ratings
Input Voltage (VIN) ................................................. 30V Switch Voltage (COL) .............................................. 35V SHDN Pin Voltage .................................................... 30V Feedback Pin Current (FB) ................................... 10mA Negative Feedback Pin Current (NFB) .............. ±10mA Operating Junction Temperature Range LT1534C............................................ 0°C to 125°C LT1534I ....................................... 40°C to 125°C Maximum Junction Temperature ........................ 125°C Storage Temperature Range ............65°C to 150°C Lead Temperature (Soldering, 10 sec.) ............. 300°C
LT1534CS Features
Greatly Reduced Conducted and Radiated EMI Low Switching Harmonic Content Independent Control of Switch Voltage and Current Slew Rates 2A Current Limited Power Switch 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
LT1534CS Typical Application
Precision Instrumentation Systems Isolated Supplies for Industrial Automation Medical Instruments Wireless Communications Single Board Data Acquisition Systems
LT1534CS Connection Diagram
LT1534CS-1 Parameters
Technical/Catalog Information
LT1534CS-1
Vendor
Linear Technology
Category
Integrated Circuits (ICs)
Type
Step-Up (Boost)
Number of Outputs
1
Voltage - Input
2.7 ~ 23 V
Voltage - Output
-
Current - Output
2A
Power - Output
-
Package / Case
16-SOIC (3.9mm Width)
Packaging
Tube
Internal Switch(s)
Yes
Synchronous
Yes
Rds (On)
-
Operating Temperature
0°C ~ 125°C
Frequency - Switching
250kHz
Drawing Number
161; 05-08-1610; S; 8
Lead Free Status
Contains Lead
RoHS Status
RoHS Non-Compliant
Other Names
LT1534CS 1 LT1534CS1
LT1534IS Parameters
Technical/Catalog Information
LT1534IS
Vendor
Linear Technology
Category
Integrated Circuits (ICs)
Type
Step-Up (Boost)
Number of Outputs
1
Voltage - Input
2.7 ~ 23 V
Voltage - Output
-
Current - Output
2A
Power - Output
-
Package / Case
16-SOIC (3.9mm Width)
Packaging
Tube
Internal Switch(s)
Yes
Synchronous
Yes
Rds (On)
-
Operating Temperature
-40°C ~ 125°C
Frequency - Switching
250kHz
Drawing Number
161; 05-08-1610; S; 8
Lead Free Status
Contains Lead
RoHS Status
RoHS Non-Compliant
Other Names
LT1534IS LT1534IS
LT1534IS General Description
The LT®1534/LT1534-1 are a new class of switching regulator designed to reduce conducted and radiated electromag netic 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 LT1534/LT1534-1 can reduce high frequency harmonic power by as much as 40dB with only minor losses in efficiency.
The LT1534/LT1534-1 utilize a current mode architecture optimized for low noise boost topologies. The ICs include a 2A power switch 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, under voltage lockout and thermal shutdown.
Low minimum supply voltage and low supply current during shutdown make theLT1534/LT1534-1 well suited for portable applications. The LT1534/LT1534-1 are available in the 16-pin narrow SO package.
LT1534IS Maximum Ratings
Input Voltage (VIN) ................................................. 30V Switch Voltage (COL) .............................................. 35V SHDN Pin Voltage .................................................... 30V Feedback Pin Current (FB) ................................... 10mA Negative Feedback Pin Current (NFB) .............. ±10mA Operating Junction Temperature Range LT1534C............................................ 0°C to 125°C LT1534I ....................................... 40°C to 125°C Maximum Junction Temperature ........................ 125°C Storage Temperature Range ............65°C to 150°C Lead Temperature (Soldering, 10 sec.) ............. 300°C
LT1534IS Features
Greatly Reduced Conducted and Radiated EMI Low Switching Harmonic Content Independent Control of Switch Voltage and Current Slew Rates 2A Current Limited Power Switch 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
LT1534IS Typical Application
Precision Instrumentation Systems Isolated Supplies for Industrial Automation Medical Instruments Wireless Communications Single Board Data Acquisition Systems
