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.
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 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 |
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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