Variable Outputs 2-Cell Battery 200W Heater Element Power Stage Buck Boost Reference Design


Design files


PMP20327 is a synchronous 4-switch buck-boost converter which utilizes the LM5175 controller as a heater element power stage in applications such as E-Cigarettes. The output voltage can be selected from 1V to 10V at 20A to 45A using a trim resistor at the FB pin with a 0.2V to 3.1V bias voltage. This design also uses a non-sync boost regulator LMR62014 to provide the bias power for LM5175 during low Vin operation. The LM5175 pulse-by-pulse current limiting is inherent in the current-mode controller. The board includes enable, synchronization and power good functions. This design supports resistive heating element ranging from 0.1Ω to 0.5Ω to support various 200W operating conditions.

  • 6V to 8.6V in, output 1V to 10V @ 20A to 45A
  • LM5175 Buck-Boost controller to achieve over 90% efficiency over entire operating conditions
  • Compact size, slim form factor, suitable for low-power applications
  • Solution Size: 26mm x 57mm
  • 98% peak efficiency

Output voltage options PMP20327.1 PMP20327.2 PMP20327.3 PMP20327.4 PMP20327.5
Vin (Min) (V) 6 6 6 6 6
Vin (Max) (V) 8.6 8.6 8.6 8.6 8.6
Vout (Nom) (V) 4.47 6.32 7.75 8.94 10
Iout (Max) (A) 45 32 26 22.5 20
Output Power (W) 201.15 202.24 201.5 201.15 200
Isolated/Non-Isolated Non-Isolated Non-Isolated Non-Isolated Non-Isolated Non-Isolated
Input Type DC DC DC DC DC
Topology Buck Boost- 4 Switch Buck Boost- 4 Switch Buck Boost- 4 Switch Buck Boost- 4 Switch Buck Boost- 4 Switch

A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDUC36C.PDF (3706 K)

Test results for the reference design, including efficiency graphs, test prerequisites and more


Detailed schematic diagram for design layout and components


Complete listing of design components, reference designators, and manufacturers/part numbers


Detailed overview of design layout for component placement


Files used for 3D models or 2D drawings of IC components


Design file that contains information on physical board layer of design PCB

TIDRMZ3.PDF (1277 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Buck-boost & inverting controllers (external switch)

LM517542V Wide Vin 4-Switch Synchronous Buck-Boost Controller

Data sheet document-pdfAcrobat PDF open-in-new HTML
Boost converters (integrated switch)

LMR62014SIMPLE SWITCHER® 2.7V to 14V, 1.4A Step-Up Regulator in SOT-23 Package

Data sheet document-pdfAcrobat PDF

Technical documentation

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Type Title Date
* Test report Variable Outputs 2-Cell Battery 200W Heater Element Power Stage Reference Design (Rev. C) Nov. 04, 2019

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