參數(shù)資料
型號(hào): MAX1748
廠商: Maxim Integrated Products, Inc.
元件分類: DC/DC變換器
英文描述: Triple-Output TFT LCD DC-DC Converter
中文描述: 三輸出TFT-LCD DC-DC轉(zhuǎn)換器
文件頁(yè)數(shù): 4/16頁(yè)
文件大小: 277K
代理商: MAX1748
M
Triple-Output TFT LCD DC-DC Converter
4
_______________________________________________________________________________________
PARAMETER
SYMBOL
V
IN
V
UVLO
I
IN
I
SUPP
I
SUPN
CONDITIONS
MIN
2.7
2.2
MAX
5.5
2.6
1
0.8
0.8
10
10
10
UNITS
V
V
mA
mA
mA
μ
A
μ
A
μ
A
Input Supply Range
Input Undervoltage Threshold
IN Quiescent Supply Current
SUPP Quiescent Current
SUPN Quiescent Current
IN Shutdown Current
SUPP Shutdown Current
SUPN Shutdown Current
MAIN BOOST CONVERTER
Output Voltage Range
FB Regulation Voltage
FB Input Bias Current
Operating Frequency
Oscillator Maximum Duty Cycle
LX Switch On-Resistance
LX Leakage Current
V
IN
rising, 40mV hysteresis (typ)
V
FB
= V
FBP
= 1.5V, V
FBN
= -0.2V
V
FBP
= 1.5V
V
FBN
= -0.1V
V
SHDN
= 0, V
IN
= 5V
V
SHDN
= 0, V
SUPP
= 13V
V
SHDN
= 0, V
SUPN
= 13V
V
MAIN
V
FB
I
FB
F
OSC
V
IN
1.225
-50
0.75
78
13
V
V
nA
MHz
%
μ
A
1.271
50
1.25
90
0.7
20
0.500
2.0
1.14
V
FB
= 1.25V, INTG = GND
R
LX(ON)
I
LX
I
LX
= 100mA
V
LX
= 13V
Phase I = soft-start (1.0ms)
Phase IV = fully on (after 3.0ms)
0.275
1.1
1.07
LX Current Limit
I
LX(MAX)
A
FB Fault Trip Level
POSITIVE CHARGE PUMP
SUPP Input Supply Range
FBP Regulation Voltage
FBP Input Bias Current
DRVP PCH On-Resistance
V
V
SUPP
V
FBP
I
FBP
2.7
1.20
-50
13
1.30
50
10
4
V
V
nA
k
V
V
FBP
= 1.5V
V
FBP
= 1.213V
V
FBP
= 1.275V
Rising edge
DRVP NCH On-Resistance
20
FBP Power-Ready Trip Level
NEGATIVE CHARGE PUMP
SUPN Input Supply Range
FBN Regulation Voltage
FBN Input Bias Current
DRVN PCH On-Resistance
1.091
1.159
V
SUPN
V
FBN
I
FBN
2.7
-50
-50
13
50
50
10
4
V
mV
nA
k
mV
V
FBN
= -0.05V
V
FBN
= 0.035V
V
FBN
= -0.025V
Rising edge
DRVN NCH On-Resistance
20
80
FBN Power-Ready Trip Level
REFERENCE
Reference Voltage
Reference Undervoltage
165
V
REF
-2
μ
A < I
REF
< 50
μ
A
V
REF
rising
1.223
0.9
1.269
1.2
V
V
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= +3.0V,
SHDN
= IN, V
SUPP
= V
SUPN
= 10V, TGND = PGND = GND, C
REF
= 0.22μF, C
INTG
= 470pF,
T
A
= -40
°
C to +85
°
C
,
unless otherwise noted.) (Note 1)
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