Rainbow Electronics MAX1885 User Manual
Page 2
MAX1778/MAX1880–MAX1885
Quad-Output TFT LCD DC-DC
Converters with Buffer
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
IN
= +3.0V, SHDN = IN, V
SUPP
= V
SUPN
= V
SUPB
= V
SUPL
= 10V, LDOOUT = FBL, BUF- = BUFOUT, BUF+ = FLTSET = TGND =
PGND = GND, C
REF
= 0.22µF, C
BUF
= 1µF, T
A
= 0°C to +85°C. Typical values are at T
A
= +25°C, unless otherwise noted.)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
IN, SHDN, TGND, FLTSET to GND...........................-0.3V to +6V
DRVN to GND .........................................-0.3V to (V
SUPN
+ 0.3V)
DRVP to GND..........................................-0.3V to (V
SUPP
+ 0.3V)
PGND to GND.....................................................................±0.3V
RDY, SUPB to GND ................................................-0.3V to +14V
LX, SUPP, SUPN to PGND .....................................-0.3V to +14V
SUPL to GND..........................................................-0.3V to +18V
LDOOUT to GND ....................................-0.3V to (V
SUPL
+ 0.3V)
INTG, REF, FB, FBN, FBP to GND ...............-0.3V to (V
IN
+ 0.3V)
FBL to GND .............-0.3V to the lower of (V
SUPL
+ 0.3V) or +6V
BUFOUT, BUF+, BUF- to GND ...............-0.3V to (V
SUPB
+ 0.3V)
Continuous Power Dissipation (T
A
= +70°C)
20-Pin TSSOP (derate 10.9mW/°C above +70°C) ......879mW
24-Pin TSSOP (derate 12.2mW/°C above +70°C) ......975mW
Operating Temperature Range
MAX1778EUG, MAX1883EUP ........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Input Supply Range
V
IN
2.7
5.5
V
Input Undervoltage Threshold
V
UVLO
V
IN
rising, 40mV hysteresis (typ)
2.2
2.4
2.6
V
MAX1778/MAX1880/
MAX1883 (f
OSC
= 1MHz)
0.7
1
IN Quiescent Supply Current
I
IN
V
FB
= V
FBP
= 1.5V, V
FBN
= -0.2V
MAX1881/MAX1882/
MAX1884/MAX1885
(f
OSC
= 500kHz)
0.6
1
mA
MAX1778/MAX1880
(f
OSC
= 1MHz)
0.4
0.7
SUPP Quiescent Current
I
SUPP
V
FBP
= 1.5V
MAX1881/MAX1882
(f
OSC
= 500kHz)
0.3
0.5
mA
MAX1778/MAX1880
(f
OSC
= 1MHz)
0.4
0.7
SUPN Quiescent Current
I
SUPN
V
FBN
= -0.2V
MAX1881/MAX1882
(f
OSC
= 500kHz)
0.3
0.5
mA
IN Shutdown Current
V
SHDN
= 0, V
IN
= 5V
0.1
10
µA
SUPP Shutdown Current
V
SHDN
= 0, V
SUPP
= 13V,
MAX1778/MAX1880/MAX1881/MAX1882
0.1
10
µA
SUPN Shutdown Current
V
SHDN
= 0, V
SUPN
= 13V,
MAX1778/MAX1880/MAX1881/MAX1882
0.1
10
µA
SUPL Shutdown Current
V
SHDN
= 0, V
SUPL
= 13V
MAX1778/MAX1881/MAX1883/MAX1884
0.1
10
µA
SUPB Shutdown Current
V
SHDN
= 0, V
SUPB
= 13V
6
13
µA