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参数资料
| 型号： | MAX8795A+ |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 1.6 A SWITCHING REGULATOR, 1400 kHz SWITCHING FREQ-MAX, QCC32 |
| 封装： | 5 X 5 MM, 0.80 MM HEIGHT, LEAD FREE, MO-220WHHD-2, TQFN-32 |
| 文件页数： | 18/24页 |
| 文件大小： | 387K |
| 代理商： | MAX8795A+ |
MAX8795A
TFT-LCD DC-DC Converter with
Operational Amplifiers
_
__
_
3
ELECTRICAL CHARACTERISTICS (continued)
(VIN = 3V, VMAIN = VSUP = 14V, PGND = AGND = BGND = 0, IREF = 25A, TA = 0°C to +85°C. Typical values are at TA = +25°C,
unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
FB Transconductance
ICOMP = ±2.5A
75
160
280
S
FB Voltage Gain
From FB to COMP
700
V/ V
LX On-Resistance
RLX(ON)
ILX = 200mA
160
260
m
LX Leakage Current
ILX
VLX = 19V
10
20
A
LX Current Limit
ILIM
VFB = 1.2V, duty cycle = 75%
2.5
3.0
3.5
A
Current-Sense Transresistance
0.1
0.2
0.3
V/A
Soft-Start Period
tSS
14
ms
Soft-Start Step Size
VREF /
128
V
OPERATIONAL AMPLIFIERS
SUP Supply Range
VSUP
6.0
18.0
V
SUP Overvoltage Fault Threshold
18.0
19
19.9
V
SUP Supply Current
ISUP
Buffer configuration, VPOS_ = VSUP / 2,
no load
3.5
5.0
mA
Input Offset Voltage
VOS
(VNEG_, VPOS_, VOUT_)
VSUP / 2
0
12
mV
Input Bias Current
IBIAS
(VNEG_ , VPOS_, VOUT_)
VSUP / 2
-50
0
+50
nA
Input Common-Mode Voltage
Range
VCM
0VSUP
V
Common-Mode Rejection Ratio
CMRR
0
≤ (VNEG_, VPOS_) ≤ VSUP
45
80
dB
Open-Loop Gain
125
dB
Output Voltage Swing, High
VOH
IOUT_ = 5mA
VSUP -
100
VSUP -
50
mV
Output Voltage Swing, Low
VOL
IOUT_ = -5mA
50
100
mV
Short-Circuit Current
To VSUP / 2, source or sink
75
130
mA
Power-Supply Rejection Ratio
PSRR
DC, 6V
≤ VSUP ≤ 18V,
(VNEG_, VPOS_)
VSUP / 2
60
dB
Slew Rate
45
V/s
-3dB Bandwidth
RL = 10k
, CL = 10pF, buffer configuration
20
MHz
GATE-ON LINEAR-REGULATOR CONTROLLER
FBP Regulation Voltage
VFBP
IDRVN = 100A
1.231
1.250
1.269
V
FBP Fault Trip Level
VFBP falling
0.96
1.00
1.04
V
FBP Input Bias Current
IFBP
VFBP = 1.25V
-50
+50
nA
FBP Effective Load-Regulation
Error (Transconductance)
VDRVP = 10V, IDRVP = 50A to 1mA
-0.7
-1.5
%
FBP Line (IN) Regulation Error
IDRVP = 100A, 2.5V < VIN < 6V
±1
±10
mV
DRVP Sink Current
IDRVP
VFBP = 1.1V, VDRVP = 10V
1
5
mA
DRVP Off-Leakage Current
VFBP = 1.4V, VDRVP = 34V
0.01
10
A
Soft-Start Period
tSS
14
ms
Soft-Start Step Size
VREF /
128
V
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