Analog Devices, Inc. 100kHz, 5A, 2.5A and 1.25A High Efficiency Switching Regulators LT1172CT#31PBF

Description
Product Details The LT1170/LT1171/LT1172 are monolithic high power switching regulators. They can be operated in all standard switching configurations including buck, boost, flyback, forward, inverting and “Cuk.” A high current, high efficiency switch is included on the die along with all oscillator, control and protection circuitry. Integration of all functions allows the LT1170/LT1171/LT1172 to be built in a standard 5-pin TO-3 or TO-220 power package as well as the 8-pin packages (LT1172). This makes them extremely easy to use and provides “bust proof” operation similar to that obtained with 3-pin linear regulators. The LT1170/LT1171/LT1172 operate with supply voltages from 3V to 60V, and draw only 6mA quiescent current. They can deliver load power up to 100W with no external power devices. By utilizing current-mode switching techniques, they provide excellent AC and DC load and line regulation. The LT1170/LT1171/LT1172 have many unique features not found even on the vastly more difficult to use low power control chips presently available. They use adaptive antisat switch drive to allow very wide ranging load currents with no loss in efficiency. An externally activated shutdown mode reduces total supply current to 50μA typically for standby operation. Applications Logic Supply 5V at 10A 5V Logic to ±15V Op Amp Supply Battery Upconverter Power Inverter (+ to –) or (– to +) Fully Floating Multiple Outputs User Note This data sheet is only intended to provide specifications, graphs, and a general functional description of the LT1170/LT1171/LT1172 . Application circuits are included to show the capability of the LT1170/LT1171/LT1172 . A complete design manual (AN19) should be obtained to assist in developing new designs. This manual contains a comprehensive discussion of both the LT1070 and the external components used with it, as well as complete formulas for calculating the values of these components. The manual can also be used for the LT1170/LT1171/LT1172 by factoring in the higher frequency. A CAD design program called SwitcherCAD® is also available.
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Suppliers

Company
Product
Description
Supplier Links
Norwood, MA, USA
100kHz, 5A, 2.5A and 1.25A High Efficiency Switching Regulators
LT1172CT#31PBF
100kHz, 5A, 2.5A and 1.25A High Efficiency Switching Regulators LT1172CT#31PBF
Product Details The LT1170/LT1171/LT1172 are monolithic high power switching regulators. They can be operated in all standard switching configurations including buck, boost, flyback, forward, inverting and “Cuk.” A high current, high efficiency switch is included on the die along with all oscillator, control and protection circuitry. Integration of all functions allows the LT1170/LT1171/LT1172 to be built in a standard 5-pin TO-3 or TO-220 power package as well as the 8-pin packages (LT1172). This makes them extremely easy to use and provides “bust proof” operation similar to that obtained with 3-pin linear regulators. The LT1170/LT1171/LT1172 operate with supply voltages from 3V to 60V, and draw only 6mA quiescent current. They can deliver load power up to 100W with no external power devices. By utilizing current-mode switching techniques, they provide excellent AC and DC load and line regulation. The LT1170/LT1171/LT1172 have many unique features not found even on the vastly more difficult to use low power control chips presently available. They use adaptive antisat switch drive to allow very wide ranging load currents with no loss in efficiency. An externally activated shutdown mode reduces total supply current to 50μA typically for standby operation. Applications Logic Supply 5V at 10A 5V Logic to ±15V Op Amp Supply Battery Upconverter Power Inverter (+ to –) or (– to +) Fully Floating Multiple Outputs User Note This data sheet is only intended to provide specifications, graphs, and a general functional description of the LT1170/LT1171/LT1172 . Application circuits are included to show the capability of the LT1170/LT1171/LT1172 . A complete design manual (AN19) should be obtained to assist in developing new designs. This manual contains a comprehensive discussion of both the LT1070 and the external components used with it, as well as complete formulas for calculating the values of these components. The manual can also be used for the LT1170/LT1171/LT1172 by factoring in the higher frequency. A CAD design program called SwitcherCAD® is also available.

Product Details

The LT1170/LT1171/LT1172 are monolithic high power switching regulators. They can be operated in all standard switching configurations including buck, boost, flyback, forward, inverting and “Cuk.” A high current, high efficiency switch is included on the die along with all oscillator, control and protection circuitry. Integration of all functions allows the LT1170/LT1171/LT1172 to be built in a standard 5-pin TO-3 or TO-220 power package as well as the 8-pin packages (LT1172). This makes them extremely easy to use and provides “bust proof” operation similar to that obtained with 3-pin linear regulators.

The LT1170/LT1171/LT1172 operate with supply voltages from 3V to 60V, and draw only 6mA quiescent current. They can deliver load power up to 100W with no external power devices. By utilizing current-mode switching techniques, they provide excellent AC and DC load and line regulation.

The LT1170/LT1171/LT1172 have many unique features not found even on the vastly more difficult to use low power control chips presently available. They use adaptive antisat switch drive to allow very wide ranging load currents with no loss in efficiency. An externally activated shutdown mode reduces total supply current to 50μA typically for standby operation.

Applications

  • Logic Supply 5V at 10A
  • 5V Logic to ±15V Op Amp Supply
  • Battery Upconverter
  • Power Inverter (+ to –) or (– to +)
  • Fully Floating Multiple Outputs

User Note

This data sheet is only intended to provide specifications, graphs, and a general functional description of the LT1170/LT1171/LT1172. Application circuits are included to show the capability of the LT1170/LT1171/LT1172. A complete design manual (AN19) should be obtained to assist in developing new designs. This manual contains a comprehensive discussion of both the LT1070 and the external components used with it, as well as complete formulas for calculating the values of these components. The manual can also be used for the LT1170/LT1171/LT1172 by factoring in the higher frequency. A CAD design program called SwitcherCAD® is also available.

Supplier's Site Datasheet
Integrated Circuits (ICs) - PMIC - Voltage Regulators - DC DC Switching Regulators - LT1172CT#31PBF - Shenzhen Shengyu Electronics Technology Limited
Futian, China
Integrated Circuits (ICs) - PMIC - Voltage Regulators - DC DC Switching Regulators
LT1172CT#31PBF
Integrated Circuits (ICs) - PMIC - Voltage Regulators - DC DC Switching Regulators LT1172CT#31PBF
IC REG MULT CONFG ADJ TO220-5

IC REG MULT CONFG ADJ TO220-5

Supplier's Site
Sheung Wan, Hong Kong
Switching Voltage Regulators
LT1172CT#31PBF
Switching Voltage Regulators LT1172CT#31PBF
Switching Voltage Regulators 100kHz 5A 2.5A and 1.25A High Efficiency Switching Regulator

Switching Voltage Regulators 100kHz 5A 2.5A and 1.25A High Efficiency Switching Regulator

Supplier's Site Datasheet
Thief River Falls, MN, United States
Voltage Regulators - DC DC Switching Regulators
505-LT1172CT#31PBF-ND
Voltage Regulators - DC DC Switching Regulators 505-LT1172CT#31PBF-ND
IC REG MULT CONFG ADJ TO220-5

IC REG MULT CONFG ADJ TO220-5

Supplier's Site Datasheet
Voltage Regulators - DC DC Switching Regulators - LT1172CT#31PBF - Quarktwin Technology Ltd.
Shenzhen, Guangdong, China
Voltage Regulators - DC DC Switching Regulators
LT1172CT#31PBF
Voltage Regulators - DC DC Switching Regulators LT1172CT#31PBF
Buck, Boost, Cuk, Flyback, Forward Converter Switching Regulator IC Positive or Negative Adjustable 1.244V 1 Output 1.25A (Switch) TO-220-5 Formed Leads

Buck, Boost, Cuk, Flyback, Forward Converter Switching Regulator IC Positive or Negative Adjustable 1.244V 1 Output 1.25A (Switch) TO-220-5 Formed Leads

Supplier's Site Datasheet
PMIC - Voltage Regulators - DC DC Switching Regulators - LT1172CT#31PBF - Lingto Electronic Limited
Shenzhen, China
PMIC - Voltage Regulators - DC DC Switching Regulators
LT1172CT#31PBF
PMIC - Voltage Regulators - DC DC Switching Regulators LT1172CT#31PBF
IC REG MULT CONFG ADJ TO220-5

IC REG MULT CONFG ADJ TO220-5

Supplier's Site Datasheet

Technical Specifications

  Analog Devices, Inc. Shenzhen Shengyu Electronics Technology Limited VAST STOCK CO., LIMITED DigiKey Quarktwin Technology Ltd. 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 LT1172CT#31PBF LT1172CT#31PBF LT1172CT#31PBF 505-LT1172CT#31PBF-ND LT1172CT#31PBF LT1172CT#31PBF
Product Name 100kHz, 5A, 2.5A and 1.25A High Efficiency Switching Regulators 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
Package Type SOIC; 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
VIN 3 to 40 volts 3 to 40 volts 3 to 40 volts
Operating Temperature 0 to 70 C (32 to 158 F) 0 to 100 C (32 to 212 F) 0 to 100 C (32 to 212 F) 0 to 100 C (32 to 212 F)
Output Voltage 1.24 volts 1.24 to 65 volts 1.24 to 65 volts
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