MAX1729 Ver la hoja de datos (PDF) - Maxim Integrated
Número de pieza
componentes Descripción
Fabricante
MAX1729
Maxim Integrated
MAX1729 Datasheet PDF : 12 Pages
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ECB and LCD Display Bias Supply with Accurate
Output Voltage and Temperature Compensation
(Circuit of Figure 2, TA = +25°C, unless otherwise noted.)
Typical Operating Characteristics
EFFICIENCY vs. OUTPUT CURRENT
VOUT = 9.4 (CTLIN AT 50% DUTY CYCLE)
60
EFFICIENCY vs. OUTPUT CURRENT
VOUT = 16.4 (CTLIN = IN)
60
NO-LOAD SUPPLY CURRENT vs.
SUPPLY VOLTAGE
0.40
50
VIN = 2.7V
40
30
VIN = 5.5V
20
10
0
0.01
0.1
1
OUTPUT CURRENT (mA)
50
40 VIN = 2.7V
30
VIN = 5.5V
20
10
0
10
0.01
0.1
1
OUTPUT CURRENT (mA)
0.35
0.30
0.25
VOUT = 16.4V
0.20
0.15
VOUT = 9.4V
0.10
VOUT = 2.5V
0.05
10
2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
SUPPLY VOLTAGE (V)
MAXIMUM OUTPUT CURRENT vs.
SUPPLY VOLTAGE
7
6
VOUT = +2.5V
5
4
VOUT = 9.4V
3
2
VOUT = 16.4V
1
PS TO OUT (LDO)
POWER-SUPPLY REJECTION RATIO
0
-20
-40
-60
-80
SHUTDOWN SUPPLY CURRENT
3.0
2.5
2.0
1.5
1.0
0.5
0
2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
SUPPLY VOLTAGE (V)
-100
1
10 100
1k
10k 100k
FREQUENCY (Hz)
0
2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
INPUT VOLTAGE (V)
OUTPUT VOLTAGE vs.
DUTY CYCLE
18
16
14
12
10
8
6
4
2
0
0 10 20 30 40 50 60 70 80 90 100
DUTY CYCLE (%)
VCTLIN
5V/div
VREF
1V/div
VTC
1V/div
VOUT
10V/div
START-UP DELAY FROM SHUTDOWN
20ms/div
VIN = 5V
IO = 0.5mA
VCTLIN
5V/div
VREF
1V/div
VTC
1V/div
VOUT
10V/div
DELAY TO SHUTDOWN
500ms/div
VIN = 5V
IO = 0.5mA
4 _______________________________________________________________________________________
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