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LM3578A

ACTIVE

2-V to 40-VIN switching regulators in buck, boost, terminal, depending upon the application

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MC33063A ACTIVE 1.5-A boost, buck, inverting switching regulator, operation from -40°C to 85°C Lower IQ in similar package

LM3578A

ACTIVE
Data sheet Order now

Product details

Rating Catalog Topology Boost, Buck, Flyback, Forward, SEPIC Vin (max) (V) 40 Vin (min) (V) 2 Vout (min) (V) 1 Features Nonsynchronous rectification, UVLO Fixed Operating temperature range (°C) 0 to 125 Iq (typ) (µA) 14000
Rating Catalog Topology Boost, Buck, Flyback, Forward, SEPIC Vin (max) (V) 40 Vin (min) (V) 2 Vout (min) (V) 1 Features Nonsynchronous rectification, UVLO Fixed Operating temperature range (°C) 0 to 125 Iq (typ) (µA) 14000
PDIP (P) 8 92.5083 mm² 9.81 x 9.43 SOIC (D) 8 29.4 mm² 4.9 x 6
  • Inverting and Non-Inverting Feedback Inputs
  • 1.0V Reference at Inputs
  • Operates from Supply Voltages of 2V to 40V
  • Output Current up to 750 mA, Saturation Less than 0.9V
  • Current Limit and Thermal Shut Down
  • Duty Cycle up to 90%

All trademarks are the property of their respective owners.

  • Inverting and Non-Inverting Feedback Inputs
  • 1.0V Reference at Inputs
  • Operates from Supply Voltages of 2V to 40V
  • Output Current up to 750 mA, Saturation Less than 0.9V
  • Current Limit and Thermal Shut Down
  • Duty Cycle up to 90%

All trademarks are the property of their respective owners.

The LM2578A is a switching regulator which can easily be set up for such DC-to-DC voltage conversion circuits as the buck, boost, and inverting configurations. The LM2578A features a unique comparator input stage which not only has separate pins for both the inverting and non-inverting inputs, but also provides an internal 1.0V reference to each input, thereby simplifying circuit design and p.c. board layout. The output can switch up to 750 mA and has output pins for its collector and emitter to promote design flexibility. An external current limit terminal may be referenced to either the ground or the Vin terminal, depending upon the application. In addition, the LM2578A has an on board oscillator, which sets the switching frequency with a single external capacitor from <1 Hz to 100 kHz (typical).

The LM2578A is an improved version of the LM2578, offering higher maximum ratings for the total supply voltage and output transistor emitter and collector voltages.

The LM2578A is a switching regulator which can easily be set up for such DC-to-DC voltage conversion circuits as the buck, boost, and inverting configurations. The LM2578A features a unique comparator input stage which not only has separate pins for both the inverting and non-inverting inputs, but also provides an internal 1.0V reference to each input, thereby simplifying circuit design and p.c. board layout. The output can switch up to 750 mA and has output pins for its collector and emitter to promote design flexibility. An external current limit terminal may be referenced to either the ground or the Vin terminal, depending upon the application. In addition, the LM2578A has an on board oscillator, which sets the switching frequency with a single external capacitor from <1 Hz to 100 kHz (typical).

The LM2578A is an improved version of the LM2578, offering higher maximum ratings for the total supply voltage and output transistor emitter and collector voltages.
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Type Title Date
* Data sheet LM2578A/LM3578A Switching Regulator datasheet (Rev. E) 03 Apr 2013
Application note AN-1066 Low Cost Boost Converters Using LM3578A (Rev. B) 23 Apr 2013
More literature Die D/S LM3578A MWC Switching Regulator 25 Sep 2012
Application note AN-1055 Low-Cost Multiple Output Flyback Converter for I/O Cards 10 May 2004

Design & development

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Supported products & hardware

Supported products & hardware

Products
AC/DC & DC/DC controllers (external FET)
  • LM3017 — High Efficiency Low-Side Controller with True Shutdown
  • LM3478 — 2.97~40V Wide Input Range Boost/SEPIC/Flyback DC-DC Controller
  • LM3478Q-Q1 — 40-V wide VIN low-side N-channel controller for switching regulators with 10-µA shutdown current
  • LM3481 — 2.97V to 48V High-Efficiency Controller for Boost, SEPIC and Flyback
  • LM3481-Q1 — 2.97-V to 48-V high-efficiency controller for boost, SEPIC and flyback, AEC-Q100 qualified
  • LM3488 — 2.97V to 40V Wide Vin Low-Side N-Channel Controller for Switching Regulators
  • LM3488Q-Q1 — 40-V wide VIN low-side N-channel controller for switching regulators with 5-µA shutdown current
  • LM3524D — 40V, 0.2A 350KHz PWM controller
  • LM3578A — 2-V to 40-VIN switching regulators in buck, boost, terminal, depending upon the application
  • LM5020 — 13-100V Wide Vin, Current Mode PWM Boost, Flyback, Sepic Controller
  • LM5022 — 6-60V Wide Vin, current mode boost, SEPIC and Flyback controller
  • TL1451 — Dual Pulse-Width-Modulation Control Circuit
  • TL1451A — 3.6V to 50V dual channel controller with Wide input voltage range
  • TL1451A-EP — Enhanced Product Dual Pulse-Width-Modulation Control Circuits
  • TL1451A-Q1 — 3.6-V to 50-V dual-channel PWM controller, AEC-Q100 qualified
  • TL5001 — PWM Controller with wide input range, with ±5% tolerance on reference, operation –20°C to 85°C
  • TL5001A — PWM Controller with wide input range, with ±3% tolerance on reference, operation –20°C to 85°C
  • TL5001A-Q1 — PWM Controller with wide input range, with ±3% tolerance on reference, operation –20°C to 85°C
  • TL5001M — PWM Controller with wide input range, with ±5% tolerance on reference, operation –55°C to 125°C
  • TPS40210-Q1 — 4.5-V to 52-V wide input range current mode boost controller with 700-mV reference voltage
  • TPS40211-Q1 — 4.5-V to 52-V wide input range current mode boost controller with 260-mV reference voltage
  • TPS43000 — Multi-Topology (buck, boost, sepic) High Frequency DC/DC Controller
  • TPS55010 — 2.95V To 6V Input, 2W, Isolated DC/DC Converter with Integrated FETS
  • UC2572 — Negative output Flyback pulse width modulator
AC/DC & DC/DC converters (integrated FET)
  • LM25017 — 7.5-48V Wide Vin, 650mA Constant On-Time Synchronous Buck Regulator
  • LM25018 — 7.5-48V Wide Vin, 300mA Constant On-Time Synchronous Buck Regulator
  • LM25019 — 7.5-48V Wide Vin, 100mA Constant On-Time Synchronous Buck Regulator
  • LM2577 — 3.5-V to 40-V, 3-A low component count step-up regulator
  • LM2585 — 4-V to 40-V, 3-A step-up wide VIN flyback regulator
  • LM2586 — 4-V to 40-V, 3-A step-up wide VIN flyback regulator with frequency synchronization
  • LM2587 — 4V to 40V, 5A Step-Up Wide Vin Flyback Regulator
  • LM2588 — 4-V to 40-V, 5-A step-up wide VIN flyback regulator with frequency synchronization
  • LM2621 — 1.2V to 14V input voltage, 1A load current, step-up DC-DC
  • LM2623 — 0.8V to 14V input voltage, 2A load current, step-up DC-DC
  • LM2623-Q1 — 0.8-V to 14-V input voltage, 2-A load current, step-up DC/DC, AEC-Q100 qualified
  • LM2735 — 520kHz/1.6MHz space efficient boost and SEPIC DC-DC regulator
  • LM2735-Q1 — 520-kHz, 1.6-MHz space efficient boost and SEPIC DC/DC regulator, AEC-Q100 qualified
  • LM34925 — 7.5-100V Wide Vin, 100mA Integrated Secondary Bias Regulator for Isolated DC/DC Converters
  • LM34926 — 7.5-100V Wide Vin, 300mA Integrated Secondary Bias Regulator for Isolated DC/DC Converters
  • LM34927 — 7.5-100V Wide Vin, 600mA Integrated Secondary Bias Regulator for Isolated DC/DC Converters
  • LM5000 — 3.1-40V Wide Vin, 2A Current Mode Non-Synchronous Boost Regulator
  • LM5001 — 3.1-75V Wide Vin, 1A Current Mode Non-Synchronous Switch Mode Regulator
  • LM5001-Q1 — 3.1-V to 75-V wide VIN, 1-A current mode non-synchronous switch mode regulator
  • LM5002 — 3.1-75V Wide Vin, 0.5A Current Mode Boost, Flyback, Sepic Converter
  • LM5015 — 4.25-75V, Monolithic Two-Switch Forward DC-DC Regulator
  • LM5017 — 7.5-100V Wide Vin, 600mA Constant On-Time Synchronous Buck Regulator
  • LM5018 — 7.5-100V Wide Vin, 300mA Constant On-Time Synchronous Buck Regulator
  • LM5019 — 7.5-100V Wide Vin, 100mA Constant On-Time Synchronous Buck Regulator
  • LM5160 — LM5160 wide input 65V, 2A synchronous buck/Fly-Buck™ converter
  • LM5160-Q1 — Wide Input 65V, 2A Synchronous Buck / Fly-Buck™ Converter
  • LM5160A — LM5160A Wide Input 65V, 2A Synchronous Buck / Fly-Buck™ Converter
  • LM5161 — Wide Input 4.5-V to 100-V, 1-A Synchronous Buck / Fly-Buck Converter
  • LM78S40 — 1.5A Adjustable Step Up, Step Down or Inverting Regulator
  • TPS55340 — 5-A, 40-V, wide VIN boost, flyback, & SEPIC converter
  • TPS55340-EP — Enhanced integrated, 5-A, 40-V wide input range boost/SEPIC/flyback DC/DC regulator
  • TPS55340-Q1 — Integrated, 5-A 40-V wide input range boost/SEPIC/flyback DC/DC regulator, AEC-Q100 qualified
  • TPS61175 — 3-A ,40V High Voltage Boost Converter with Soft-start and Programmable Switching Frequency
  • TPS61175-Q1 — 3-A, 40-V high voltage boost converter with soft-start and programmable switching frequency
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