Datasheet

MAX8795A
TFT-LCD DC-DC Converter with
Operational Amplifiers
12 ______________________________________________________________________________________
GATE-OFF REGULATOR LINE REGULATION
MAX8795A toc10
INPUT VOLTAGE (V)
VOLTAGE ERROR (%)
-10-12-14
-0.8
-0.4
-0.6
-0.2
0.2
0
0.4
-1.0
-16
I
NEG
= 50mA
GATE-OFF REGULATOR LOAD REGULATION
MAX8795A toc11
LOAD CURRENT (mA)
VOLTAGE ERROR (%)
40302010
-0.8
-0.6
-0.4
-0.2
0
0.2
-1.0
050
I
BOOST
= 0mA
4ms/div
POWER-UP SEQUENCE
0V
MAX8795A toc12
B
0V
A
A: V
MAIN
, 10V/div
B: V
POS
, 20V/div
C: V
NEG
, 10V/div
D: V
COM
, 20V/div
0V
C
D
0V
SUP SUPPLY CURRENT
vs. SUP VOLTAGE
I
SUP
(mA)
MAX8795A toc13
6 8 10 12 1614 18
2.8
3.1
3.0
2.9
3.3
3.2
3.5
3.4
3.6
V
SUP
(V)
4µs/div
OPERATIONAL-AMPLIFIER
RAIL-TO-RAIL INPUT/OUTPUT
0V
MAX8795A toc14
B
0V
A
A: INPUT SIGNAL, 5V/div
B: OUTPUT SIGNAL, 5V/div
V
SUP
= 15V
Typical Operating Characteristics (continued)
(Circuit of Figure 1, V
IN
= 5V, V
MAIN
= 14V, V
GON
= 25V, V
GOFF
= -10V, T
A
= +25°C, unless otherwise noted.)