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MAX1677 Datasheet(PDF) 6 Page - Maxim Integrated Products

Part No. MAX1677
Description  Compact, High-Efficiency, Dual-Output Step-Up and LCD Bias DC-DC Converter
Download  16 Pages
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Maker  MAXIM [Maxim Integrated Products]
Homepage  http://www.maxim-ic.com
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MAX1677 Datasheet(HTML) 6 Page - Maxim Integrated Products

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Compact, High-Efficiency, Dual-Output
Step-Up and LCD Bias DC-DC Converter
6
_______________________________________________________________________________________
10mV/
div
VLX
ILX
VRIPPLE
200mA/
div
100mV/
div
5
µs/div
LCD SWITCHING WAVEFORMS
MAX1677-13
LDCLX CURRENT LIMIT = 350mA,
2.4VIN, +12VOUT, 10mA LOAD
10mV/
div
VLX
ILX
VRIPPLE
200mA/
div
100mV/
div
2
µs/div
LCD SWITCHING WAVEFORMS
(50k
Ω FROM LCDPOL TO OUT)
MAX1677-14
LCDLX CURRENT LIMIT = 225mA,
2.4VIN, +12VOUT, 10mA LOAD
50mV/
div
IOUT
VRIPPLE
200mA/
div
2ms/div
MAIN BOOST CONVERTER
LOAD TRANSIENT
MAX1677-15
VIN = 2.4V, VOUT = 3.3V
ILOAD = 0 to 200mA
2V/
div
VLX
ILX
VRIPPLE
100mA/
div
50mV/
div
1
µs/div
MAIN BOOST CONVERTER SWITCHING
WAVEFORMS (PWM MODE)
MAX1677-10
2.4VIN, 3.3VOUT,
200mA IOUT
2V/
div
VLX
ILX
VRIPPLE
100mA/
div
20mV/
div
2
µs/div
MAIN BOOST CONVERTER SWITCHING
WAVEFORMS (PFM MODE)
MAX1677-11
1.2VIN, 3.3VOUT,
20mA IOUT
2V/
div
VLX
ILX
VRIPPLE
100mA/
div
50mV/
div
10
µs/div
MAIN BOOST CONVERTER SWITCHING
WAVEFORMS (PFM MODE, 50mA OUTPUT)
MAX1677-12
PFM, 1.2VIN,
3.3VOUT, 50mA IOUT
Typical Operating Characteristics (continued)
(Circuits of Figures 2 and 3, TA = +25°C, unless otherwise noted.)


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