MAX8795A Maxim Integrated Products, MAX8795A Datasheet - Page 2

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

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ABSOLUTE MAXIMUM RATINGS
IN, CTL to AGND ...................................................-0.3V to +7.5V
COMP, FB, FBP, FBN, DEL, REF to AGND ....-0.3V to (V
PGND, BGND to AGND ......................................................±0.3V
LX to PGND ............................................................-0.3V to +20V
SUP to AGND .........................................................-0.3V to +20V
DRVP to AGND.......................................................-0.3V to +36V
POS_, NEG_, OUT_ to AGND ...................-0.3V to (V
DRVN to AGND ...................................(V
SRC to AGND .........................................................-0.3V to +40V
COM, DRN to AGND ................................-0.3V to (V
DRN to COM............................................................-30V to +30V
TFT-LCD DC-DC Converter with
Operational Amplifiers
ELECTRICAL CHARACTERISTICS
(V
unless otherwise noted.)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
2
Note 1: See Figure 2 for the op amp clamp structure.
IN Supply Range
IN Undervoltage-Lockout
Threshold
IN Quiescent Current
Duration to Trigger Fault
Condition
REF Output Voltage
REF Load Regulation
REF Sink Current
REF Undervoltage Lockout
Threshold
Thermal Shutdown
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
IN
_______________________________________________________________________________________
= 3V, V
PARAMETER
MAIN
= V
SUP
= 14V, PGND = AGND = BGND = 0, I
SYMBOL
V
V
IN
f
UVLO
V
MAIN
OSC
V
I
IN
FB
IN
- 30V) to (V
(Note 2)
V
V
LX not switching
V
LX switching
FB or FBP below threshold or FBN above
threshold
No external load
0 < I
In regulation
Rising edge; typical hysteresis = 160mV
Temperature rising
Hysteresis
No load
V
0 < I
V
V
IN
FB
FB
FB
IN
FB
SRC
SUP
IN
IN
rising, typical hysteresis = 50mV
= 2.5V to 6V
= V
= 1.2V, V
falling
= 1.233V
LOAD
MAIN
+ 0.3V)
+ 0.3V)
+ 0.3V)
+ 0.3V)
FBP
< full load, transient only
< 50µA
= 1.3V, V
FBP
REF
CONDITIONS
= 1.4V, V
POS_ to NEG_ RMS Current ...................................5mA (Note 1)
OUT_ Maximum Continuous Output Current....................±75mA
LX Switch Maximum Continuous RMS Current .....................1.6A
Continuous Power Dissipation (T
Operating Temperature Range, E Grade ............-40°C to +85°C
Operating Temperature Range, G Grade .........-40°C to +105°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
= 25µA, T
FBN
T
T
T
T
A
A
A
A
32-Pin Thin QFN (derate 34.5mW/°C above +70°C) 2758mW
32-Pin LQFP (derate 48.4mW/°C above +70°C)....1652.9mW
= +25°C to +85°C
= 0°C to +85°C
= +25°C to +85°C
= 0°C to +85°C
= 0,
FBN
A
= 0,
= 0°C to +85°C. Typical values are at T
1.238
1.232
1.221
1.212
1000
MIN
2.05
1.10
V
2.5
10
86
IN
A
= +70°C)
1.250
1.250
1.233
1.233
+160
+100
1200
TYP
2.25
1.14
200
0.6
0.1
15
90
-1
2
1.262
1.266
1.245
1.248
+200
MAX
1400
2.45
1.15
1.17
±0.4
6.0
1.0
10
18
93
3
A
= +25°C,
UNITS
%/ V
kHz
mA
mV
ms
µA
°C
nA
%
%
V
V
V
V
V
V
V