MAX8795A 데이터 시트보기 (PDF) - Maxim Integrated
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MAX8795A Datasheet PDF : 31 Pages
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TFT-LCD DC-DC Converter with
Operational Amplifiers
ELECTRICAL CHARACTERISTICS (continued)
(VIN = 3V, VMAIN = VSUP = 14V, VPGND = VAGND = VBGND = 0V, IREF = 25µA, TA = 0°C to +85°C. Typical values are at TA = +25°C,
unless otherwise noted.)
PARAMETER
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
SYMBOL
RLX(ON)
ILX
ILIM
CONDITIONS
∆ICOMP = ±2.5µA
From FB to COMP
ILX = 200mA
VLX = 19V
VFB = 1.2V, duty cycle = 75%
tSS
VSUP
MIN TYP MAX UNITS
75
160 280
µS
700
V/ V
160 260
mΩ
10
20
µA
2.5
3.0
3.5
A
0.1
0.2
0.3
V/A
14
ms
VREF /
V
128
6.0
18.0
V
18.0
19
19.9
V
SUP Supply Current
Input Offset Voltage
Input Bias Current
Input Common-Mode Voltage
Range
ISUP
VOS
IBIAS
VCM
Buffer configuration, VPOS_ = VSUP / 2,
no load
(VNEG_, VPOS_, VOUT_) ≅ VSUP / 2
(VNEG_ , VPOS_, VOUT_) ≅ VSUP / 2
3.5
5.0
mA
0
12
mV
-50
0
+50
nA
0
VSUP
V
Common-Mode Rejection Ratio
Open-Loop Gain
CMRR 0 ≤ (VNEG_, VPOS_) ≤ VSUP
Output Voltage Swing, High
VOH
IOUT_ = 5mA
Output Voltage Swing, Low
VOL
IOUT_ = -5mA
Short-Circuit Current
To VSUP / 2, source or sink
Power-Supply Rejection Ratio
PSRR
DC, 6V ≤ VSUP ≤ 18V,
(VNEG_, VPOS_) ≅ VSUP / 2
Slew Rate
-3dB Bandwidth
RL = 10kΩ, CL = 10pF, buffer configuration
GATE-ON LINEAR-REGULATOR CONTROLLER
FBP Regulation Voltage
VFBP IDRVN = 100µA
FBP Fault Trip Level
VFBP falling
FBP Input Bias Current
IFBP
VFBP = 1.25V
FBP Effective Load-Regulation
Error (Transconductance)
VDRVP = 10V, IDRVP = 50µA to 1mA
45
VSUP -
100
75
80
125
VSUP -
50
50
130
60
45
20
1.231
0.96
-50
1.250
1.00
-0.7
100
1.269
1.04
+50
-1.5
dB
dB
mV
mV
mA
dB
V/µs
MHz
V
V
nA
%
FBP Line (IN) Regulation Error
DRVP Sink Current
DRVP Off-Leakage Current
Soft-Start Period
Soft-Start Step Size
IDRVP
tSS
IDRVP = 100µA, 2.5V < VIN < 6V
VFBP = 1.1V, VDRVP = 10V
VFBP = 1.4V, VDRVP = 34V
±1
±10
mV
1
5
mA
0.01
10
µA
14
ms
VREF /
128
V
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