参数资料
型号: MAX8795AGCJ+T
厂商: Maxim Integrated Products
文件页数: 7/31页
文件大小: 0K
描述: IC CONV DC-DC TFT-LCD 32LQFP
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 2,000
应用: 转换器,TFT,LCD
输入电压: 2.5 V ~ 6 V
输出数: 8
输出电压: 2.5 V ~ 18 V
工作温度: -40°C ~ 105°C
安装类型: 表面贴装
封装/外壳: 32-LQFP
供应商设备封装: 32-LQFP(7x7)
包装: 带卷 (TR)
TFT-LCD DC-DC Converter with
Operational Amplifiers
ELECTRICAL CHARACTERISTICS (continued)
(V IN = 3V, V MAIN = V SUP = 14V, V PGND = V AGND = V BGND = 0V, I REF = 25μA, T A = 0°C to +105°C . Typical values are at T A = +25°C,
unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MAIN STEP-UP REGULATOR
Output Voltage Range
V MAIN
VIN
18
V
Operating Frequency
Oscillator Maximum Duty Cycle
f OSC
1000
86
1200
90
1400
93
kHz
%
FB Regulation Voltage
FB Fault Trip Level
VFB
No load
V FB falling
T A = +25°C to +105°C
T A = 0°C to +105°C
1.221
1.212
1.10
1.233
1.233
1.14
1.245
1.248
1.17
V
V
FB Load Regulation
0 < I MAIN < full load, transient only
-1
FB Line Regulation
FB Input Bias Current
V IN = 2.5V to 6V
V FB = 1.233V
0.1
+100
±0.4
+200
%/V
nA
FB Transconductance
FB Voltage Gain
? I COMP = ±2.5μA
From FB to COMP
75
160
700
280
μS
V/V
LX On-Resistance
LX Leakage Current
R LX(ON)
I LX
I LX = 200mA
V LX = 19V
160
10
300
20
m ?
μA
LX Current Limit
Current-Sense Transresistance
I LIM
V FB = 1.2V, duty cycle = 75%
2.5
0.1
3.0
0.2
3.5
0.3
A
V/A
Soft-Start Period
Soft-Start Step Size
t SS
14
VREF /
128
ms
V
OPERATIONAL AMPLIFIERS
SUP Supply Range
SUP Overvoltage Fault Threshold
SUP Supply Current
Input Offset Voltage
V SUP
I SUP
V OS
Buffer configuration, V POS_ = V SUP / 2,
no load
(V NEG_ , VPOS_, V OUT_ ) ? V SUP / 2
6.0
18.0
19
3.5
0
18.0
19.9
5.0
12
V
mA
mV
Input Bias Current
Input Common-Mode Voltage
Range
Common-Mode Rejection Ratio
I BIAS
V CM
CMRR
(V NEG_ , V POS_ , V OUT_ ) ? V SUP / 2
0 ≤ (V NEG_ , V POS_ ) ≤ V SUP
-50
0
45
0
80
+50
VSUP
nA
V
dB
Open-Loop Gain
125
dB
Output Voltage Swing, High
V OH
I OUT_ = 5mA
V SUP -
100
V SUP -
50
mV
Output Voltage Swing, Low
Short-Circuit Current
Power-Supply Rejection Ratio
V OL
PSRR
I OUT_ = -5mA
To V SUP / 2, source or sink
DC, 6V ≤ V SUP ≤ 18V,
(V NEG_ , V POS_ ) ? V SUP / 2
75
60
50
130
100
mV
mA
dB
Slew Rate
45
V/μs
-3dB Bandwidth
R L = 10k ? , C L = 10pF, buffer configuration
20
MHz
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