Analog Devices, Inc. Step-Down Switching Regulator LT1074CT#30PBF

Description
Product Details The LT1074 is a 5A (LT1076 is rated at 2A) monolithic bipolar switching regulator which requires only a few external parts for normal operation. The power switch, all oscillator and control circuitry, and all current limit components,are included on the chip. The topology is a classic positive “buck” configuration but several design innovations allow this device to be used as a positive-to-negative converter, a negative boost converter, and as a flyback converter. The switch output is specified to swing 40V below ground, allowing the LT1074 to drive a tapped-inductor in the buck mode with output currents up to 10A. The LT1074 uses a true analog multiplier in the feedback loop. This makes the device respond nearly instantaneously to input voltage fluctuations and makes loop gain independent of input voltage. As a result, dynamic behavior of the regulator is significantly improved over previous designs. On-chip pulse by pulse current limiting makes the LT1074 nearly bust-proof for output overloads or shorts. The input voltage range as a buck converter is 8V to 60V, but a self-boot feature allows input voltages as low as 5V in the inverting and boost configurations. The LT1074 is available in lowcost TO-220 or DD packages with frequency pre-set at 100kHz and current limit at 6.5A (LT1076 =2.6A). A 7-pin TO-220 package is also available which allows current limit to be adjusted down to zero. In addition, full micropower shutdown can be programmed. See Application Note 44 for design details. A fixed 5V output, 2A version is also available. See LT1076-5. Applications Buck Converter with Output Voltage Range of 2.5V to 50V Tapped-Inductor Buck Converter with 10A Output at 5V Positive-to-Negative Converter Negative Boost Converter Multiple Output Buck Converter
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Suppliers

Company
Product
Description
Supplier Links
Norwood, MA, USA
Step-Down Switching Regulator
LT1074CT#30PBF
Step-Down Switching Regulator LT1074CT#30PBF
Product Details The LT1074 is a 5A (LT1076 is rated at 2A) monolithic bipolar switching regulator which requires only a few external parts for normal operation. The power switch, all oscillator and control circuitry, and all current limit components,are included on the chip. The topology is a classic positive “buck” configuration but several design innovations allow this device to be used as a positive-to-negative converter, a negative boost converter, and as a flyback converter. The switch output is specified to swing 40V below ground, allowing the LT1074 to drive a tapped-inductor in the buck mode with output currents up to 10A. The LT1074 uses a true analog multiplier in the feedback loop. This makes the device respond nearly instantaneously to input voltage fluctuations and makes loop gain independent of input voltage. As a result, dynamic behavior of the regulator is significantly improved over previous designs. On-chip pulse by pulse current limiting makes the LT1074 nearly bust-proof for output overloads or shorts. The input voltage range as a buck converter is 8V to 60V, but a self-boot feature allows input voltages as low as 5V in the inverting and boost configurations. The LT1074 is available in lowcost TO-220 or DD packages with frequency pre-set at 100kHz and current limit at 6.5A (LT1076 =2.6A). A 7-pin TO-220 package is also available which allows current limit to be adjusted down to zero. In addition, full micropower shutdown can be programmed. See Application Note 44 for design details. A fixed 5V output, 2A version is also available. See LT1076-5. Applications Buck Converter with Output Voltage Range of 2.5V to 50V Tapped-Inductor Buck Converter with 10A Output at 5V Positive-to-Negative Converter Negative Boost Converter Multiple Output Buck Converter

Product Details

The LT1074 is a 5A (LT1076 is rated at 2A) monolithic bipolar switching regulator which requires only a few external parts for normal operation. The power switch, all oscillator and control circuitry, and all current limit components,are included on the chip. The topology is a classic positive “buck” configuration but several design innovations allow this device to be used as a positive-to-negative converter, a negative boost converter, and as a flyback converter. The switch output is specified to swing 40V below ground, allowing the LT1074 to drive a tapped-inductor in the buck mode with output currents up to 10A.

The LT1074 uses a true analog multiplier in the feedback loop. This makes the device respond nearly instantaneously to input voltage fluctuations and makes loop gain independent of input voltage. As a result, dynamic behavior of the regulator is significantly improved over previous designs.

On-chip pulse by pulse current limiting makes the LT1074 nearly bust-proof for output overloads or shorts. The input voltage range as a buck converter is 8V to 60V, but a self-boot feature allows input voltages as low as 5V in the inverting and boost configurations.

The LT1074 is available in lowcost TO-220 or DD packages with frequency pre-set at 100kHz and current limit at 6.5A (LT1076 =2.6A). A 7-pin TO-220 package is also available which allows current limit to be adjusted down to zero. In addition, full micropower shutdown can be programmed. See Application Note 44 for design details.

A fixed 5V output, 2A version is also available. See LT1076-5.

Applications

  • Buck Converter with Output Voltage Range of 2.5V to 50V
  • Tapped-Inductor Buck Converter with 10A Output at 5V
  • Positive-to-Negative Converter
  • Negative Boost Converter
  • Multiple Output Buck Converter
Supplier's Site Datasheet
Integrated Circuits (ICs) - PMIC - Voltage Regulators - DC DC Switching Regulators - LT1074CT#30PBF - Shenzhen Shengyu Electronics Technology Limited
Futian, China
Integrated Circuits (ICs) - PMIC - Voltage Regulators - DC DC Switching Regulators
LT1074CT#30PBF
Integrated Circuits (ICs) - PMIC - Voltage Regulators - DC DC Switching Regulators LT1074CT#30PBF
IC REG MULTI CONFG ADJ TO220-5

IC REG MULTI CONFG ADJ TO220-5

Supplier's Site
Sheung Wan, Hong Kong
Switching Voltage Regulators
LT1074CT#30PBF
Switching Voltage Regulators LT1074CT#30PBF
Switching Voltage Regulators 5A Step-Down Switching Reg

Switching Voltage Regulators 5A Step-Down Switching Reg

Supplier's Site Datasheet
Voltage Regulators - DC DC Switching Regulators - LT1074CT#30PBF - Quarktwin Technology Ltd.
Shenzhen, Guangdong, China
Voltage Regulators - DC DC Switching Regulators
LT1074CT#30PBF
Voltage Regulators - DC DC Switching Regulators LT1074CT#30PBF
Buck, Boost, Flyback Switching Regulator IC Positive or Negative Adjustable 2.5V 1 Output 5.5A (Switch) TO-220-5 Formed Leads

Buck, Boost, Flyback Switching Regulator IC Positive or Negative Adjustable 2.5V 1 Output 5.5A (Switch) TO-220-5 Formed Leads

Supplier's Site Datasheet
Thief River Falls, MN, United States
Voltage Regulators - DC DC Switching Regulators
505-LT1074CT#30PBF-ND
Voltage Regulators - DC DC Switching Regulators 505-LT1074CT#30PBF-ND
IC REG MULTI CONFG ADJ TO220-5

IC REG MULTI CONFG ADJ TO220-5

Supplier's Site Datasheet
PMIC - Voltage Regulators - DC DC Switching Regulators - LT1074CT#30PBF - Lingto Electronic Limited
Shenzhen, China
PMIC - Voltage Regulators - DC DC Switching Regulators
LT1074CT#30PBF
PMIC - Voltage Regulators - DC DC Switching Regulators LT1074CT#30PBF
IC REG MULTI CONFG ADJ TO220-5

IC REG MULTI CONFG ADJ TO220-5

Supplier's Site Datasheet

Technical Specifications

  Analog Devices, Inc. Shenzhen Shengyu Electronics Technology Limited VAST STOCK CO., LIMITED Quarktwin Technology Ltd. DigiKey Lingto Electronic Limited
Product Category IC Switching Voltage Regulators IC Switching Voltage Regulators IC Switching Voltage Regulators IC Switching Voltage Regulators IC Switching Voltage Regulators IC Switching Voltage Regulators
Product Number LT1074CT#30PBF LT1074CT#30PBF LT1074CT#30PBF LT1074CT#30PBF 505-LT1074CT#30PBF-ND LT1074CT#30PBF
Product Name Step-Down Switching Regulator Integrated Circuits (ICs) - PMIC - Voltage Regulators - DC DC Switching Regulators Switching Voltage Regulators Voltage Regulators - DC DC Switching Regulators Voltage Regulators - DC DC Switching Regulators PMIC - Voltage Regulators - DC DC Switching Regulators
Configuration / Function Buck Buck; Boost
Package Type TO-220 TO-220 TO-220; Other; TO-220-5 Formed Leads TO-220; Other; TO-220-5 Formed Leads
Life Cycle Stage Production Active Active
IOUT 4.4 amps 5.5 amps 5.5 amps 5.5 amps 5.5 amps
VIN 7.3 to 45 volts 8 to 45 volts 8 to 45 volts
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