Analog Devices, Inc. Step-Down Switching Regulator LT1074IT#PBF

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
LT1074IT#PBF
Step-Down Switching Regulator LT1074IT#PBF
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
Voltage Regulators - DC DC Switching Regulators - 505-LT1074IT#PBF-ND - DigiKey
Thief River Falls, MN, United States
Voltage Regulators - DC DC Switching Regulators
505-LT1074IT#PBF-ND
Voltage Regulators - DC DC Switching Regulators 505-LT1074IT#PBF-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 - LT1074IT#PBF - Lingto Electronic Limited
Shenzhen, China
PMIC - Voltage Regulators - DC DC Switching Regulators
LT1074IT#PBF
PMIC - Voltage Regulators - DC DC Switching Regulators LT1074IT#PBF
IC REG MULTI CONFG ADJ TO220-5

IC REG MULTI CONFG ADJ TO220-5

Supplier's Site Datasheet
Integrated Circuits (ICs) - PMIC - Voltage Regulators - DC DC Switching Regulators - LT1074IT#PBF - Shenzhen Shengyu Electronics Technology Limited
Futian, China
Integrated Circuits (ICs) - PMIC - Voltage Regulators - DC DC Switching Regulators
LT1074IT#PBF
Integrated Circuits (ICs) - PMIC - Voltage Regulators - DC DC Switching Regulators LT1074IT#PBF
IC REG MULTI CONFG ADJ TO220-5

IC REG MULTI CONFG ADJ TO220-5

Supplier's Site
Voltage Regulators - DC DC Switching Regulators - LT1074IT#PBF - Quarktwin Technology Ltd.
Shenzhen, Guangdong, China
Voltage Regulators - DC DC Switching Regulators
LT1074IT#PBF
Voltage Regulators - DC DC Switching Regulators LT1074IT#PBF
Buck, Boost, Flyback Switching Regulator IC Positive or Negative Adjustable 2.5V 1 Output 5.5A (Switch) TO-220-5

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

Supplier's Site Datasheet
Integrated Circuits - LT1074IT#PBF - LIXINC Electronics Co., Limited
Hong Kong, China
Integrated Circuits
LT1074IT#PBF
Integrated Circuits LT1074IT#PBF
IC REG MULTI CONFG ADJ TO220-5

IC REG MULTI CONFG ADJ TO220-5

Supplier's Site Datasheet

Technical Specifications

  Analog Devices, Inc. DigiKey Lingto Electronic Limited Shenzhen Shengyu Electronics Technology Limited Quarktwin Technology Ltd. LIXINC Electronics Co., 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 LT1074IT#PBF 505-LT1074IT#PBF-ND LT1074IT#PBF LT1074IT#PBF LT1074IT#PBF LT1074IT#PBF
Product Name Step-Down Switching Regulator Voltage Regulators - DC DC Switching Regulators PMIC - Voltage Regulators - DC DC Switching Regulators Integrated Circuits (ICs) - PMIC - Voltage Regulators - DC DC Switching Regulators Voltage Regulators - DC DC Switching Regulators Integrated Circuits
Configuration / Function Buck Buck; Boost Buck; Boost; Buck, Boost, Flyback
Package Type TO-220 TO-220; Other; TO-220-5 TO-220 TO-220; Other; TO-220-5 TO-220; Other; Tube
Life Cycle Stage Production Active Active Active
IOUT 4.4 amps 5.5 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 45 volts
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