MAX8795A Maxim Integrated Products, MAX8795A Datasheet - Page 10

• Manufacturer Part Number: MAX8795A
• Description: TFT-LCD DC-DC Converter
• Manufacturer: Maxim Integrated Products

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TFT-LCD DC-DC Converter with
Operational Amplifiers
ELECTRICAL CHARACTERISTICS (continued)
(V
10
Note 2: For 5.5V < V
Note 3: Specifications to -40°C and +105°C are guaranteed by design, not production tested.
(Circuit of Figure 1, V
GATE-OFF LINEAR-REGULATOR CONTROLLER
FBN Regulation Voltage
FBN Effective Load-Regulation
Error (Transconductance)
FBN Line (IN) Regulation Error
DRVN Source Current
POSITIVE GATE-DRIVER TIMING AND CONTROL SWITCHES
DEL Capacitor Charge Current
DEL Turn-On Threshold
CTL Input Low Voltage
CTL Input High Voltage
SRC Input Voltage Range
SRC Input Current
S RC - to- C OM S w i tch On- Resi stance
D RN - to- C O M S w i tch On- Resi stance
IN
90
85
80
75
70
= 3V, V
______________________________________________________________________________________
1
not exceed 5.5V.
PARAMETER
MAIN
STEP-UP EFFICIENCY
vs. LOAD CURRENT
LOAD CURRENT (mA)
= V
10
SUP
IN
IN
= 5V, V
< 6.0V, use MAX8795A for no longer than 1% of IC lifetime. For continuous operation, input voltage should
= 14V, PGND = AGND = BGND = 0, I
100
V
V
MAIN
IN
MAIN
= 5V
= 13.9V
= 14V, V
SYMBOL
R
R
V
1000
DRN(ON)
SRC(ON)
TH(DEL)
I
V
DRVN
I
SRC
FBN
GON
= 25V, V
1.4
1.3
1.2
1.1
1.0
I
V
I
V
During startup, V
V
V
V
V
V
V
DRVN
DRVN
DRVN
FBN
IN
IN
DEL
DEL
DEL
DEL
2.5
= 2.5V to 5.5V
= 2.5V to 5.5V
= 1.5V, CTL = IN
= 1.5V, CTL = AGND
= 1.5V, CTL = IN
= 1.5V, CTL = AGND
= 300mV, V
= 100µA, V
= 0.1mA, 2.5V < V
= -10V, I
GOFF
3.0
SWITCHING FREQUENCY
vs. INPUT VOLTAGE
INPUT VOLTAGE (V)
REF
3.5
= -10V, T
CONDITIONS
DRVN
DEL
= 25µA, T
DRVN
REF
4.0
= 1V
Typical Operating Characteristics
= 50µA to 1mA
- V
A
= -10V
= +25°C, unless otherwise noted.)
4.5
FBN
IN
A
< 6V
= -40°C to +105°C, unless otherwise noted.) (Note 3)
5.0
5.5
18
15
12
9
6
3
0
2.5
0.972
1.19
MIN
1
4
2
3.0
STEP-UP SUPPLY CURRENT
vs. SUPPLY VOLTAGE
CURRENT INTO INDUCTOR
3.5
SUPPLY VOLTAGE (V)
NO LOAD, SUP DISCONNECTED,
R1 = 221kΩ, R2 = 21.5kΩ
CURRENT INTO IN PIN
4.0
4.5
1.022
MAX
1.31
300
200
0.6
25
±5
36
12
70
6
5.0
5.5
UNITS
mV
mV
mA
µA
µA
Ω
Ω
V
V
V
V
V
6.0