MAXREFDES1198: Ultra-Miniature 4.5V to 36V Input and 3.3V, 2A, High-Efficiency, Synchronous Step-Down DC-DC Converter Reference Design


Reference Design Disclaimer See the  Important Notice and Disclaimer  covering reference designs and other Maxim resources.


The MAX17632 family of parts (MAX17632A, MAX17632B, and MAX17632C) includes high-efficiency, high-voltage, synchronous step-down DC-DC converters with integrated MOSFETs operating over an input-voltage range of 4.5V to 36V. These parts can deliver current up to 2A. The MAX17632A and MAX17632B are fixed 3.3V and fixed 5V output parts, respectively. The MAX17632C is an adjustable output voltage (0.9V to 90% of VIN) part. Built-in compensation across the output-voltage range eliminates the need for external compensation components. The MAX17632 features peak-current-mode control architecture. The device can be operated in forced pulse width modulation (PWM), pulse-frequency modulation (PFM), or discontinuous-conduction mode (DCM) to enable high efficiency under full-load and light-load conditions.


  • Wide 4.5V to 36V Input
  • 3.3V Output
  • Up to 2A Output Current
  • Fully Assembled and Tested
  • Proven PCB Layout


Designed, Built, Tested

Board pictured here has been fully assembled and tested. Not available for sale.



PCB Layout

Test Results


Input Type Vin(Min) Vin(Max) Iout(Max) Single/Multiple Output Vout(V) Pout(W) Isolated/Non-Isolated Topology
DC 4.5 36 2 - 3.3 6.6 Non-Isolated -


Input Type DC
Vin(Min) 4.5
Vin(Max) 36
Iout(Max) 2
Single/Multiple Output -
Vout(V) 3.3
Pout(W) 6.6
Isolated/Non-Isolated Non-Isolated
Topology -

Maxim Devices (1)

Part Number Name Product Family Order Design kits and evaluation modules
MAX17632 4.5V to 36V, 2A, High-Efficiency, Synchronous Step-Down DC-DC Converter Switching Regulator - Switching Regulators Buy Now Design Kits

Maxim Devices (1)

Part Number Product Family
Switching Regulator - Switching Regulators
4.5V to 36V, 2A, High-Efficiency, Synchronous Step-Down DC-DC Converter

Design Files (4)

Title Type Size Date
maxrefdes1198-schematic PDF 15KB 2019-07-09
TTS MAXREFDES Test Results Template_Rev 0_0318 PDF 250KB 2019-07-09
maxrefdes1198-pcb PDF 1MB 2019-07-09
maxrefdes1198-bom PDF 96KB 2019-07-09
Date Type


(PDF, 15KB)


TTS MAXREFDES Test Results Template_Rev 0_0318

(PDF, 250KB)



(PDF, 1MB)



(PDF, 96KB)

MAXREFDES1198 Related Videos

View All Videos