MAX8795AGCJ(2007) View Datasheet(PDF) - Maxim Integrated
Part Name
Description
Manufacturer
MAX8795AGCJ Datasheet PDF : 30 Pages
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TFT-LCD DC-DC Converter with
Operational Amplifiers
ELECTRICAL CHARACTERISTICS (continued)
(VIN = 3V, VMAIN = VSUP = 14V, PGND = AGND = BGND = 0, IREF = 25µA, TA = 0°C to +105°C. Typical values are at TA = +25°C,
unless otherwise noted.)
PARAMETER
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
SUP Overvoltage Fault Threshold
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
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
VMAIN
VIN
18
V
fOSC
1000 1200 1400 kHz
86
90
93
%
VFB
No load
TA = +25°C to +105°C 1.221 1.233 1.245
V
TA = 0°C to +105°C
1.212 1.233 1.248
VFB falling
1.10 1.14 1.17
V
0 < IMAIN < full load, transient only
-1
%
VIN = 2.5V to 6V
0.1
±0.4
%/ V
VFB = 1.233V
+100 +200
nA
∆ICOMP = ±2.5µA
75
160 280
µS
From FB to COMP
700
V/ V
RLX(ON) ILX = 200mA
160 300
mΩ
ILX
VLX = 19V
10
20
µA
ILIM
VFB = 1.2V, duty cycle = 75%
2.5
3.0
3.5
A
0.1
0.2
0.3
V/A
tSS
14
ms
VREF /
128
V
VSUP
ISUP
VOS
IBIAS
VCM
CMRR
VOH
VOL
PSRR
Buffer configuration, VPOS_ = VSUP / 2,
no load
(VNEG_, VPOS_, VOUT_) ≅ VSUP / 2
(VNEG_ , VPOS_, VOUT_) ≅ VSUP / 2
0 ≤ (VNEG_, VPOS_) ≤ VSUP
IOUT_ = 5mA
IOUT_ = -5mA
To VSUP / 2, source or sink
DC, 6V ≤ VSUP ≤ 18V,
(VNEG_, VPOS_) ≅ VSUP / 2
RL = 10kΩ, CL = 10pF, buffer configuration
6.0
18.0
19
3.5
0
-50
0
0
45
VSUP -
100
75
80
125
VSUP -
50
50
130
60
45
20
18.0
19.9
5.0
12
+50
VSUP
100
V
V
mA
mV
nA
V
dB
dB
mV
mV
mA
dB
V/µs
MHz
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