MAX1729 Maxim, MAX1729 Datasheet - Page 4

• Manufacturer Part Number: MAX1729
• Description: ECB and LCD Display Bias Supply with Accurate Output Voltage and Temperature Compensation
• Manufacturer: Maxim

ECB and LCD Display Bias Supply with Accurate
Output Voltage and Temperature Compensation
(Circuit of Figure 2, T
4
_______________________________________________________________________________________
60
50
40
30
20
10
16
14
12
10
0
18
7
6
5
4
3
2
1
0
8
6
4
2
0
0.01
2.5
V
0
OUT
EFFICIENCY vs. OUTPUT CURRENT
V
MAXIMUM OUTPUT CURRENT vs.
10
IN
3.0
= 9.4 (CTLIN AT 50% DUTY CYCLE)
= 2.7V
20 30 40
OUTPUT VOLTAGE vs.
3.5
OUTPUT CURRENT (mA)
SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
0.1
V
DUTY CYCLE (%)
DUTY CYCLE
IN
A
= 5.5V
4.0
= +25°C, unless otherwise noted.)
50 60 70 80 90 100
4.5
V
V
V
OUT
1
OUT
OUT
5.0
= 16.4V
= +2.5V
= 9.4V
5.5
6.0
10
10V/div
V
5V/div
1V/div
1V/div
CTLIN
V
-100
V
V
OUT
-20
-40
-60
-80
REF
40
30
60
50
20
10
TC
0
0
0.01
1
START-UP DELAY FROM SHUTDOWN
V
EFFICIENCY vs. OUTPUT CURRENT
POWER-SUPPLY REJECTION RATIO
IN
= 2.7V
10
V
OUT
OUTPUT CURRENT (mA)
PS TO OUT (LDO)
0.1
V
= 16.4 (CTLIN = IN)
FREQUENCY (Hz)
IN
100
= 5.5V
20ms/div
Typical Operating Characteristics
1k
1
V
I
O
IN
10k
= 0.5mA
= 5V
100k
10
10V/div
V
5V/div
1V/div
1V/div
CTLIN
V
V
V
OUT
REF
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
TC
3.0
2.5
2.0
1.5
1.0
0.5
0
2.5
2.5
NO-LOAD SUPPLY CURRENT vs.
3.0
SHUTDOWN SUPPLY CURRENT
3.0
DELAY TO SHUTDOWN
3.5
3.5
SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
INPUT VOLTAGE (V)
4.0
4.0
500ms/div
V
V
V
OUT
OUT
OUT
4.5
4.5
= 16.4V
= 9.4V
= 2.5V
5.0
5.0
V
I
O
IN
= 0.5mA
= 5V
5.5
5.5
6.0
6.0