MAX8795A Maxim Integrated Products, MAX8795A Datasheet - Page 7

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

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ELECTRICAL CHARACTERISTICS (continued)
(V
unless otherwise noted.)
MAIN STEP-UP REGULATOR
Output Voltage Range
Operating Frequency
Oscillator Maximum Duty Cycle
FB Regulation Voltage
FB Fault Trip Level
FB Load Regulation
FB Line Regulation
FB Input Bias Current
FB Transconductance
FB Voltage Gain
LX On-Resistance
LX Leakage Current
LX Current Limit
Current-Sense Transresistance
Soft-Start Period
Soft-Start Step Size
OPERATIONAL AMPLIFIERS
SUP Supply Range
S U P O ver vol tag e Faul t Thr eshol d
SUP Supply Current
Input Offset Voltage
Input Bias Current
Input Common-Mode Voltage
Range
Common-Mode Rejection Ratio
Open-Loop Gain
Output Voltage Swing, High
Output Voltage Swing, Low
Short-Circuit Current
Power-Supply Rejection Ratio
Slew Rate
-3dB Bandwidth
IN
= 3V, V
PARAMETER
MAIN
= V
_______________________________________________________________________________________
SUP
= 14V, PGND = AGND = BGND = 0, I
SYMBOL
R
CMRR
V
PSRR
LX(ON)
V
I
f
I
V
V
I
V
V
V
BIAS
MAIN
OSC
t
SUP
I
LIM
SUP
SS
LX
CM
OH
OS
OL
FB
TFT-LCD DC-DC Converter with
No load
V
0 < I
V
V
∆I
From FB to COMP
I
V
V
Buffer configuration, V
no load
(V
(V
0 ≤ (V
I
I
To V
DC, 6V ≤ V
(V
R
LX
OUT
OUT
FB
IN
FB
LX
FB
L
COMP
NEG
NEG
NEG
= 10kΩ, C
= 200mA
= 2.5V to 6V
= 19V
falling
= 1.233V
= 1.2V, duty cycle = 75%
SUP
MAIN
_ = 5mA
_ = -5mA
NEG
_, V
_ , V
_, V
= ±2.5µA
/ 2, source or sink
POS
_, V
POS
< full load, transient only
POS
SUP
L
POS
_, V
_) ≅ V
_, V
REF
CONDITIONS
= 10pF, buffer configuration
≤ 18V,
OUT
_) ≤ V
OUT
= 25µA, T
SUP
Operational Amplifiers
_) ≅ V
T
T
_) ≅ V
POS
A
A
SUP
/ 2
= +25°C to +105°C
= 0°C to +105°C
_ = V
SUP
SUP
A
= 0°C to +105°C. Typical values are at T
SUP
/ 2
/ 2
/ 2,
V
1.221
1.212
1000
18.0
MIN
1.10
SUP
100
V
2.5
0.1
6.0
-50
75
45
75
60
86
0
IN
-
V
V
1.233
1.233
+100
1200
TYP
1.14
160
700
160
128
125
SUP
130
REF
3.0
0.2
3.5
0.1
10
14
19
80
50
50
45
20
90
-1
0
0
/
-
1.245
1.248
+200
V
MAX
1400
1.17
±0.4
18.0
19.9
300
+50
100
280
3.5
0.3
5.0
18
93
20
12
SUP
A
= +25°C,
UNITS
MHz
V/µs
%/ V
kHz
V/ V
mΩ
V/A
mA
mV
mV
mV
mA
ms
dB
dB
dB
nA
µS
µA
nA
%
%
V
V
V
A
V
V
V
V
7