TFT-LCD DC-DC Converter with
Operational Amplifiers
MAX8795A
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= 3V, V
MAIN
= V
SUP
= 14V, V
PGND
= V
AGND
= V
BGND
= 0V, I
REF
= 25μA,
T
A
= 0°C to +85°C.
Typical values are at T
A
= +25°C,
unless otherwise noted.)
PARAMETER
FBN Regulation Voltage
FBN Fault Trip Level
FBN Input Bias Current
FBN Effective Load-Regulation
Error (Transconductance)
FBN Line (IN) Regulation Error
DRVN Source Current
DRVN Off-Leakage Current
Soft-Start Period
Soft-Start Step Size
POSITIVE GATE-DRIVER TIMING AND CONTROL SWITCHES
DEL Capacitor Charge Current
DEL Turn-On Threshold
DEL Discharge Switch
On-Resistance
CTL Input Low Voltage
CTL Input High Voltage
CTL Input Leakage Current
CTL-to-SRC Propagation Delay
SRC Input Voltage Range
SRC Input Current
SRC-to-COM Switch On-Resistance
DRN-to-COM Switch
On-Resistance
I
SRC
R
SRC(ON)
R
DRN(ON)
V
DEL
= 1.5V, CTL = IN
V
DEL
= 1.5V, CTL = AGND
V
DEL
= 1.5V, CTL = IN
V
DEL
= 1.5V, CTL = AGND
200
115
5
30
V
TH(DEL)
During UVLO, V
IN
= 2.0V
V
IN
= 2.5V to 5.5V
V
IN
= 2.5V to 5.5V
CTL = AGND or IN
2
-1
100
36
300
200
10
60
+1
During startup, V
DEL
= 1V
4
1.19
5
1.25
20
0.6
6
1.31
μA
V
Ω
V
V
μA
ns
V
μA
Ω
Ω
t
SS
I
DRVN
I
FBN
SYMBOL
V
FBN
CONDITIONS
I
DRVN
= 100μA, V
REF
- V
FBN
V
FBN
rising
V
FBN
= 0.25V
V
DRVN
= -10V, I
DRVN
= 50μA to 1mA
I
DRVN
= 0.1mA, 2.5V < V
IN
< 6V
V
FBN
= 300mV, V
DRVN
= -10V
V
FBN
= 0V, V
DRVN
= -25V
1
MIN
0.984
370
-50
11
±0.7
5
-0.01
14
(V
REF
-
V
FBN
) /
128
-10
TYP
1
420
MAX
1.015
470
+50
25
±5
UNITS
V
mV
nA
mV
mV
mA
μA
ms
V
GATE-OFF LINEAR-REGULATOR CONTROLLER
4
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MAXIM [ MAXIM INTEGRATED PRODUCTS ]
