MAXREFDES1200
Reference Guide
(PDF 537 KB)
06 Aug 2019
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.
Schematic
PCB Layout
BOM
Test Results
Tools & Models
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 Regulators | Buy Now | Design Kits |
Maxim Devices (1)
| Part Number
|
Product Family
|
|---|---|
|
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 |
80KB | 2019-06-21 | |
| maxrefdes1200-schematic |
10KB | 2019-06-21 | |
| MAXREFDES1200 Design Verification Testing |
128KB | 2019-06-21 | |
| maxrefdes1200-pcb |
1MB | 2019-06-21 |
| Date
|
Type
|
|---|---|
| 2019-06-21 |
(PDF, 80KB) |
| 2019-06-21 |
(PDF, 10KB) |
| 2019-06-21 |
(PDF, 128KB) |
| 2019-06-21 |
(PDF, 1MB) |
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