3V to 5V DC Output Step-Up DC-DC Converter using MAX668

  • Rajkumar Sharma
  • 83 Views
  • easy
  • Tested
  • SKU: EL119863
  • Quote Now

The project presented here is a powerful constant-frequency, pulse-width modulating (PWM), current-mode step-up DC-DC switching regulator efficiently producing 5V from input voltages between 3V to 5V. The project can be used in a portable device that works with a battery. The module produces a peak current of up to 1A and an output voltage of 5V DC.

The MAX668 current-mode PWM controllers operate in a wide range of DC-DC conversion applications, including boost, SEPIC, flyback, and isolated output configurations. Optimum conversion efficiency is maintained over a wide range of loads by employing both PWM operation and Maxim’s proprietary Idle Mode control to minimize operating current at light loads. Other features include shutdown, adjustable internal operating frequency or synchronization to an external clock, soft start, adjustable current limit, and a wide (1.8V to 28V) input range.

Features

  • Operating Supply 3V to 5V
  • Output 5V DC @ 500mA (1Amp Peak)
  • Operating Frequency 500Khz
  • 4 Pin Header Connector for Input and Output
  • PCB dimensions: 32.70 x 21.27 mm

Connections CN1

  • Pin 1: 3V to 5V Input
  • Pin 2: GND
  • Pin 3: GND
  • Pin 4: 5V DC Output

Schematic

Parts List

NO.QNTY.REF.DESC.MANUFACTURERSUPPLIERPART NO
11CN14 PIN MALE HEADER PITCH 2.54MMWURTHDIGIKEY
22C1,C50.1uF/50V SMD SIZE 0805MURATA/YAGEODIGIKEY
31C2100uF/10VWURTHDIGIKEY732-9197-1-ND
41C31uF/10V SMD SIZE 0805MURATA/YAGEODIGIKEY
51C4220uF/10VWURTH732-9418-1-ND
61C60.22uF/10V SMD SIZE 0805MURATA/YAGEODIGIKEY
71D1SS34NEXT GENDIGIKEY3372-SS34TR-ND
81L14.7uHEPCOS/TDKDIGIKEY495-1997-2-ND
91R1DNPDO NOT INSTALL
102R2,R70E SMD SIZE 0805MURATA/YAGEODIGIKEY
111R30.025E 1% SMD SIZE 2512MURATA/YAGEODIGIKEY
121R475K 1% SMD SIZE 0805MURATA/YAGEODIGIKEY
131R5100K 5% SMD SIZE 0805MURATA/YAGEODIGIKEY
141R624.9K 1% SMD SIZE 0805 MURATA/YAGEODIGIKEY
151U1MAX668MAXIMDIGIKEYMAX668EUB+-ND
161U2FDS6680 SO8ON SEMIRS COMPO.671-0605

Connections



Gerber View

Photos

Video

MAX668 Datasheet

MAX668-MAX669

PCB

Subscribe
Notify of
guest
0 Comments
Inline Feedbacks
View all comments

RELATED PROJECTS