3.1-40V Wide Vin, 2A Current Mode Non-Synchronous Boost Regulator
Product details
Parameters
Package | Pins | Size
Features
300kHz/700kHz (-3)
600kHz/1.3MHz (-6)
Description
The LM5000 is a monolithic integrated circuit specifically designed and optimized for flyback, boost or forward power converter applications. The internal power switch is rated for a maximum of 80V, with a current limit set to 2A. Protecting the power switch are current limit and thermal shutdown circuits. The current mode control scheme provides excellent rejection of line transients and cycle-by-cycle current limiting. An external compensation pin and the built-in slope compensation allow the user to optimize the frequency compensation. Other distinctive features include softstart to reduce stresses during start-up and an external shutdown pin for remote ON/OFF control. There are two operating frequency ranges available. The LM5000-3 is pin selectable for either 300kHz (FS Grounded) or 700kHz (FS Open). The LM5000-6 is pin selectable for either 600kHz (FS Grounded) or 1.3MHz (FS Open). The device is available in a low profile 16-lead TSSOP package or a thermally enhanced 16-lead LLP package.
Technical documentation
= Featured
| Type | Title | Date | |
|---|---|---|---|
| * | Datasheet | LM5000 High Voltage Switch Mode Regulator datasheet (Rev. D) | Mar. 09, 2007 |
| Selection guides | Power Management Guide 2018 (Rev. R) | Jun. 25, 2018 | |
| Technical articles | High cell battery packs fuel new applications and extend time between charges | Sep. 03, 2015 | |
| User guides | LM5000EVAL Non-Isolated Flyback Evaluation Module User’s Guide | Jul. 21, 2014 | |
| Technical articles | Why wide VIN ICs for a 12V or 24V rail? | Oct. 29, 2013 | |
| Application notes | Automated Frequency Response Analyzer | Oct. 09, 2013 | |
| White papers | Wide VIN power management ICs simplify white paper (Rev. A) | Sep. 19, 2013 | |
| White papers | HV, Single-Chip DC/DC Reg Optimized for Flyback, Boost, or Frwd-Pwr Conv Apps | Oct. 01, 2003 | |
| Application notes | HV, single IC DC/DC reg optimizd for flyback, boost, or forward pwr cnvrtr apps | Mar. 24, 2003 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Features
Features:
- 80 V internal switch
- Operating input voltage range of 3.1 V to 40 V
- Pin selectable operating frequency
300 kHz/700kHz (-3)
600 kHz/1.25MHz (-6) - Adjustable output voltage
- External compensation
- Input undervoltage lockout
- Softstart
- Current limit
- Over temperature protection
- External shutdown
- Small 16-Lead (...)
Design tools & simulation
FLYBUCK-FLYBACK-DESIGN-CALC — This tool helps a power supply engineer to select the right isolated DC-DC topology based on the specifications. Depending on the topology chosen, the calculator also recommends the right IC for the design.
Features
- Features isolated topologies like Fly-Buck™, Fly-Buck-Boost, DCM and CCM Flyback
- Capability to design up to 6 isolated outputs
- Recommends ICs for desired application design
- Incorporates loop compensation in designs
- Compares efficiency, external component count and transformer currents for every topology (...)
LM5000MATHCAD-CALC
SNVU077.ZIP (2559 KB)
Reference designs
PMP7900 — This is an isolated flyback converter with input voltage range of 12V to 24Vin and dual polarity outputs (+/-12Vout) at 0.25A each (total of 0.5Aout).
Design files
-
download PMP7900 BOM.pdf (23KB)
PMP7932 — PMP7932 is an isolated flyback converter which accepts an input voltage of 12Vin to 24Vin and provides dual polarity ouputs of +12Vout @ 0.25A and -12V @ 0.25A.
Design files
-
download PMP7932 BOM.pdf (102KB) -
download PMP7932 PCB.pdf (785KB) -
download PMP7932 CAD Files.zip (391KB) -
download PMP7932 Gerber.zip (194KB)
PMP7964 — A Flyback design accepting an input voltage of 4.5Vin to 5.5Vin and providing an isolated output of 4Vout that can deliver 0.7A.
Design files
-
download PMP7964 BOM.pdf (128KB)
PMP7754 — This design uses a 12Vac input which is rectified and fed to a boost DC to DC Converter with constant current feedback loop for driving 6 series LEDs at 0.32A. Also implemented is a simple circuit to decode a dimming signal from a TRIAC. This dimming decoder circuit controls the dimming level of the (...)
Design files
-
download PMP7754 BOM.pdf (92KB) -
download PMP7754 Gerber.zip (22KB)
CAD/CAE symbols
| Package | Pins | Download |
|---|---|---|
| TSSOP (PW) | 16 | View options |
| WSON (NHQ) | 16 | View options |
Ordering & quality
Support & training
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