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MAX1747 Datasheet(PDF) 7 Page - Maxim Integrated Products

Part # MAX1747
Description  Triple Charge-Pump TFT LCD DC-DC Converter
Download  13 Pages
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Manufacturer  MAXIM [Maxim Integrated Products]
Direct Link  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX1747 Datasheet(HTML) 7 Page - Maxim Integrated Products

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Triple Charge-Pump TFT LCD
DC-DC Converter
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MAXIMUM POSITIVE CHARGE-PUMP
OUTPUT VOLTAGE vs. SUPPLY VOLTAGE
VSUPP (V)
IPOS = 1mA
IPOS = 10mA
VPOS(NOMINAL) = 32V
LOAD TRANSIENT
MAX1747 toc14
40
µs/div
200mA
100mA
0
5.05V
4.95V
5V
VIN = 3.3V, VOUT = 5.0V
ROUT = 500
Ω TO 25Ω
CINTG = 1500pF
IOUT
100mA/div
VOUT
50mV/div
RIPPLE WAVEFORM
MAX1747 toc15
400ns/div
VOUT = +5.0V,IOUT = 200mA
VNEG = -7V, INEG = 10mA
VPOS = +12V, IPOS = 5mA
VOUT
20mV/div
VNEG
10mV/div
VPOS
10mV/div
STARTUP WAVEFORM (NO LOAD)
MAX1747 toc16
1ms/div
2V
2V
0
4V
4V
0
2V
VON
2V/div
VCXP
2V/div
VOUT
2V/div
VOUT = 5V, NO LOAD
ON CONNECTED TO SHDN THROUGH
A 58k
Ω RESISTOR
STARTUP WAVEFORM (200mA LOAD)
MAX1747 toc17
1ms/div
2V
2V
0
4V
4V
0
2V
VOUT = 5V, ROUT = 25
Ω (200mA)
VON
2V/div
VCXP
2V/div
VOUT
2V/div
ON CONNECTED TO SHDN THROUGH
A 58k
Ω RESISTOR
POWER-UP SEQUENCE
MAX1747 toc18
ON CONNECTED TO SHDN THROUGH
A 58k
Ω RESISTOR
2V
0
0
5V
-10V
0
10V
2ms/div
VMAIN = 5V, VNEG = -7V, VPOS = 12V
VON
2V/div
VMAIN
5V/div
VPOS
10V/div
VNEG
10V/div
Typical Operating Characteristics (continued)
(Circuit of Figure 1, VIN = VSUPM = +3.3V, TA = +25°C, unless otherwise noted.)


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