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MAXREFDES1200: Two-Layer Board, 3.3V/2.5A, Synchronous Buck DC-DC Converter Using the MAX17244

MAXREFDES1200

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Description

The MAXREFDES1200 demonstrates how to build a lowcost buck DC-DC converter using the step-down converter MAX17244 for 3.3V DC output applications from a 12V to 32V input. This reference design delivers up to 2.5A at 3.3V. This design uses a two-layer board and minimizes component count to reduce cost. An overview of the design specification is shown in table above.

The MAX17244 high-efficiency, synchronous step-down DC-DC converter with integrated MOSFETs operates over a 3.5V to 36V input voltage range with 42V input transient protection. It uses a current-mode control architecture and can operate in the pulse-width modulation (PWM) or pulse-frequency modulation (PFM) control schemes. The device can operate in dropout conditions by running at 98% duty cycle. Under light-load applications, the external sync pin FSYNC logic input allows the device to operate either in PFM mode for reduced current consumption or fixed-frequency FPWM (forced-PWM) mode to eliminate frequency variation to minimize EMI. This converter delivers up to 2.5A and generates fixed output voltages of 3.3V/5V, along with the ability to program the output voltage between 1V to 10V. This device is available in a compact 16-pin (5mm x 5mm) TQFN package with exposed pad and 16-pin TSSOP.

The MAXREFDES1200 demonstrates how to build a low-cost buck DC-DC converter using the step-down converter MAX17244 for 3.3V DC output applications from a 12V to 32V input. This reference design delivers up to 2.5A at 3.3V. This design uses a two-layer board and minimizes component count to reduce cost.

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Designed, Built, Tested

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

 

Parametrics

Input Type Vin(Min) Vin(Max) Iout(Max) Single/Multiple Output Vout(V) Pout(W) Isolated/Non-Isolated Topology
DC 12 32 2.5 - 3.27 8.25 Non-Isolated -

Parametrics

Input Type DC
Vin(Min) 12
Vin(Max) 32
Iout(Max) 2.5
Single/Multiple Output -
Vout(V) 3.27
Pout(W) 8.25
Isolated/Non-Isolated Non-Isolated
Topology -

Maxim Devices (1)

Part Number Name Product Family Order Design kits and evaluation modules
MAX17244 3.5V–36V, 2.5A, Synchronous Buck Converter With 28μA Quiescent Current and Reduced EMI Switching Regulator - Switching Regulators Buy Now Design Kits

Maxim Devices (1)

Part Number Product Family
Switching Regulator - Switching Regulators
3.5V–36V, 2.5A, Synchronous Buck Converter With 28μA Quiescent Current and Reduced EMI

Design Files (4)

Title Type Size Date
maxrefdes1200-bom PDF 80KB 2019-06-21
maxrefdes1200-schematic PDF 10KB 2019-06-21
MAXREFDES1200 Design Verification Testing PDF 128KB 2019-06-21
maxrefdes1200-pcb PDF 1MB 2019-06-21
Date Type
2019-06-21

maxrefdes1200-bom

(PDF, 80KB)

2019-06-21

maxrefdes1200-schematic

(PDF, 10KB)

2019-06-21

MAXREFDES1200 Design Verification Testing

(PDF, 128KB)

2019-06-21

maxrefdes1200-pcb

(PDF, 1MB)

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