MAX1885EUP-T Maxim Integrated, MAX1885EUP-T Datasheet - Page 3

• Manufacturer Part Number: MAX1885EUP-T
• Description: LCD Drivers Quad-Output TFT LCD DC-DC Converter with Buffer
• Manufacturer: Maxim Integrated

Specifications of MAX1885EUP-T

• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Package / Case: TSSOP-20
• Mounting Style: SMD/SMT

ELECTRICAL CHARACTERISTICS (continued)
(V
PGND = GND, C
Maxim Integrated
MAIN STEP-UP CONVERTER
Main Output Voltage Range
FB Regulation Voltage
FB Input Bias Current
Operating Frequency
Oscillator Maximum Duty
Cycle
Load Regulation
Line Regulation
Integrator Transconductance
LX Switch On-Resistance
LX Leakage Current
LX Current Limit
Maximum RMS LX Current
Soft-Start Period
FB Fault Trip Level
POSITIVE CHARGE PUMP (MAX1778/MAX1880/MAX1881/MAX1882 only)
SUPP Input Supply Range
Operating Frequency
FBP Regulation Voltage
FBP Input Bias Current
DRVP PCH On-Resistance
DRVP NCH On-Resistance
Maximum RMS DRVP Current
FBP Power-Ready Trip Level
FBP Fault Trip Level
IN
= +3.0V, SHDN = IN, V
PARAMETER
REF
= 0.22µF, C
SUPP
BUF
= V
SYMBOL
R
R
R
PCH(ON)
V
NCH(ON)
= 1µF, T
V
SUPN
V
f
LX(ON)
f
I
I
V
SUPP
MAIN
OSC
I
t
CHP
I
FBP
LIM
FBP
FB
LX
SS
FB
= V
A
SUPB
I
V
= 0°C to +85°C. Typical values are at T
LX
Integrator enabled, C
Integrator disabled (INTG = REF)
V
MAX1778/MAX1880/MAX1883
MAX1881/MAX1882/MAX1884/MAX1885
I
V
Phase I = soft-start (1024/f
Phase II = soft-start (1024/f
Phase III = soft-start (1024/f
Phase IV = fully on (after 3072/f
Power-up to the end of Phase III
Falling edge, FLTSET = GND
Falling edge, FLTSET = 1V
V
V
V
Rising edge
Falling edge, FLTSET = GND
Falling edge, FLTSET = 1V
MAIN
LX
FB
LX
FBP
FBP
FBP
MAX1778/MAX1880–MAX1885
= 0 to 200mA,
= 100mA
= 1.25V, INTG = GND
= 13V
= V
Quad-Output TFT LCD DC/DC
= 1.5V
= 1.2V
= 1.3V
= 10V
SUPL
= 10V, LDOOUT = FBL, BUF- = BUFOUT, BUF+ = FLTSET = TGND =
CONDITIONS
INTG
Converters with Buffer
Integrator enabled,
C
Integrator disabled
(INTG = REF)
INTG
= 1000pF
OSC
OSC
OSC
= 1000pF
)
)
OSC
)
)
A
= +25°C, unless otherwise noted.)
1.234
1.220
0.275
0.955
0.955
MIN
0.85
1.15
1.07
1.09
1.08
425
V
-50
-50
2.7
1.2
80
20
IN
3072 / f
0.5 x f
1.247
1.125
TYP
0.01
0.35
0.01
0.38
0.75
1.12
0.99
1.25
1.11
0.99
500
317
0.2
0.1
1.5
1.1
0.1
85
1
1
5
2
OSC
OSC
1.260
1.280
1.025
1.025
MAX
1.15
1.85
1.14
1.16
1.16
+50
+50
575
0.7
0.5
1.3
13
91
20
13
10
4
UNITS
MHz
kHz
%/V
nA
µS
µA
Hz
nA
kΩ
%
%
Ω
Ω
Ω
V
V
A
A
V
V
V
A
V
V
s
3