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MAX1880EUG Datasheet(PDF) 10 Page - Maxim Integrated Products

Part # MAX1880EUG
Description  Quad-Output TFT LCD DC-DC Converters with Buffer
Download  38 Pages
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Manufacturer  MAXIM [Maxim Integrated Products]
Direct Link  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX1880EUG Datasheet(HTML) 10 Page - Maxim Integrated Products

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Quad-Output TFT LCD DC-DC
Converters with Buffer
10
______________________________________________________________________________________
Typical Operating Characteristics (continued)
(Circuit of Figure 1, VIN = +3.3V, SHDN = IN, VMAIN = VSUPP = VSUPN = VSUPB = VSUPL = 8V, BUF- = BUFOUT,
BUF+ = FLTSET = TGND = PGND = GND, TA = +25°C.)
30
50
40
70
60
90
80
100
NEGATIVE CHARGE-PUMP EFFICIENCY
vs. LOAD CURRENT
INEG (mA)
0
10203040
VSUPN = 7V
VSUPN = 8V
VSUPN = 6V
VNEG = -5V
-14
-10
-12
-6
-8
-4
-2
26
8
4
101214
MAXIMUM NEGATIVE CHARGE-PUMP
OUTPUT VOLTAGE vs. SUPPLY VOLTAGE
VSUPN (V)
INEG = 10mA
INEG = 1mA
1.23
1.24
1.25
1.26
1.27
0
20406080
100
REFERENCE VOLTAGE
vs. REFERENCE LOAD CURRENT
IREF (
µA)
STEP-UP CONVERTER LOAD-TRANSIENT
RESPONSE
MAX1778 toc13
200mA
0
8.1V
8.0V
7.9V
1A
0
40
µs/div
A. IMAIN = 20mA to 200mA, 200mA/div
B. VMAIN = 8V, 100mV/div
C. INDUCTOR CURRENT, 1A/div
CINTG = 1000pF
C
B
A
STEP-UP CONVERTER LOAD-TRANSIENT
RESPONSE WITHOUT INTEGRATOR
MAX1778 toc14
200mA
0
8.1V
8.0V
7.9V
1A
0
40
µs/div
A. IMAIN = 20mA to 200mA, 200mA/div
B. VMAIN = 8V, 100mV/div
C. INDUCTOR CURRENT, 1A/div
INTG = REF
C
B
A
STEP-UP CONVERTER LOAD-TRANSIENT
RESPONSE (1
µs PULSES)
MAX1778 toc15
0.5A
0
8.0V
7.9V
1A
0.5A
0
4
µs/div
A. IMAIN = 0 to 500mA, 500mA/div
B. VMAIN = 8V, 100mV/div
C. INDUCTOR CURRENT, 500mA/div
C
B
A


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