Dec 5, 2012 #1 I incol Full Member level 2 Joined Jan 18, 2005 Messages 143 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,296 Activity points 1,077 Hi, everyone I am designing a circuit which transfers 5.5V voltage to 3.3V, and don't want to use the BUCK , as it needs an inductor. Is there anyother circuit can replace it? And also the efficiency should high. Thanks a lot!
Hi, everyone I am designing a circuit which transfers 5.5V voltage to 3.3V, and don't want to use the BUCK , as it needs an inductor. Is there anyother circuit can replace it? And also the efficiency should high. Thanks a lot!
Dec 5, 2012 #2 B backdoor_ Member level 2 Joined Jun 1, 2001 Messages 42 Helped 4 Reputation 8 Reaction score 4 Trophy points 1,288 Activity points 217 Use Charge Pump converters. http://parametric.linear.com/html/inductorless_(charge_pump)_dc|dc_converters
Use Charge Pump converters. http://parametric.linear.com/html/inductorless_(charge_pump)_dc|dc_converters
Dec 5, 2012 #3 crutschow Advanced Member level 6 Joined Feb 22, 2012 Messages 4,469 Helped 999 Reputation 1,996 Reaction score 1,129 Trophy points 1,393 Location Colorado USA Zulu -7 Activity points 25,340 How much 3.3V current do you need?
Dec 6, 2012 #4 I incol Full Member level 2 Joined Jan 18, 2005 Messages 143 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,296 Activity points 1,077 the current is 200mA
Dec 6, 2012 #5 crutschow Advanced Member level 6 Joined Feb 22, 2012 Messages 4,469 Helped 999 Reputation 1,996 Reaction score 1,129 Trophy points 1,393 Location Colorado USA Zulu -7 Activity points 25,340 For 200mA you probably need a buck regulator. What's wrong with an inductor? The new high frequency buck regulators require very small inductors.
For 200mA you probably need a buck regulator. What's wrong with an inductor? The new high frequency buck regulators require very small inductors.
Dec 6, 2012 #6 udhay_cit Full Member level 6 Joined May 16, 2008 Messages 346 Helped 37 Reputation 74 Reaction score 37 Trophy points 1,318 Activity points 3,895 Why do you not thinking about linear regulator [LDO] MCP1700T-3302E/TT.... with 0.1v drop...
Dec 6, 2012 #7 crutschow Advanced Member level 6 Joined Feb 22, 2012 Messages 4,469 Helped 999 Reputation 1,996 Reaction score 1,129 Trophy points 1,393 Location Colorado USA Zulu -7 Activity points 25,340 udhay_cit said: Why do you not thinking about linear regulator [LDO] MCP1700T-3302E/TT.... with 0.1v drop... Click to expand... He stated he wanted high efficiency. A linear regulator would have only 60% efficiency.
udhay_cit said: Why do you not thinking about linear regulator [LDO] MCP1700T-3302E/TT.... with 0.1v drop... Click to expand... He stated he wanted high efficiency. A linear regulator would have only 60% efficiency.
Dec 6, 2012 #8 I incol Full Member level 2 Joined Jan 18, 2005 Messages 143 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,296 Activity points 1,077 yes, I want high efficiency, and inductor will waste too much place
Dec 6, 2012 #9 crutschow Advanced Member level 6 Joined Feb 22, 2012 Messages 4,469 Helped 999 Reputation 1,996 Reaction score 1,129 Trophy points 1,393 Location Colorado USA Zulu -7 Activity points 25,340 How much space do you have?
Dec 6, 2012 #10 N ninju Full Member level 3 Joined May 14, 2011 Messages 188 Helped 49 Reputation 98 Reaction score 48 Trophy points 1,308 Activity points 2,398 Whats more important for you? Area or Efficiency? If you don't want to build a discrete circuit, try an IC. https://www.ti.com/lsds/ti/analog/powermanagement/power_portal.page
Whats more important for you? Area or Efficiency? If you don't want to build a discrete circuit, try an IC. https://www.ti.com/lsds/ti/analog/powermanagement/power_portal.page