Rainbow Electronics MAX1664 User Manual
Page 2
MAX1664
Active-Matrix Liquid Crystal Display
(AMLCD) Supply
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
IN
= V
INP
= 3.3V,
SHDN = IN, V
BPVDD
= 4V, V
BPVSS
= -1V, PGND1 = PGND2 = FPLL = GND, f
BPCLK
= 30kHz, T
A
= 0°C to +70°C,
unless otherwise noted. Typical values are at T
A
= +25°C.)
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.
RDY, IN, BPV
DD
to GND...........................................-0.3V to +6V
FB2-, PGND1, PGND2 to GND ..........................................±0.3V
LX1 to PGND1 ..........................................................-0.3V to +6V
BPV
SS
to GND .......................................................-3.3V to +0.3V
BPVDD to BPV
SS
......................................................-0.3V to +6V
BPDRV to BPV
SS
..................................-0.3V to (V
BPVDD
+ 0.3V)
LX2P to INP ............................................................-15V to +0.3V
LX2N to PGND2......................................................-0.3V to +30V
SHDN, INP, FB1, FB2+, REF, PLLC,
BPCLK, FPLL to GND ................................-0.3V to (V
IN
+0.3V)
RDY Sink Current ................................................................20mA
LX2P, LX2N Peak Switch Currents .................................±750mA
Continuous Power Dissipation (T
A
= +70°C)
20-Pin TSSOP (derate 7mW/°C above+70°C) ..............559mW
Operating Temperature Range...............................0°C to +70°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering, 10sec) .............................+300°C
FPLL = IN
FPLL = REF
FPLL = GND
Rising edge, 2% hysteresis
V
LX1
= 6V
FPLL = REF
FPLL = GND
V
FB1
= 1.3V
V
FB1+
= V
FB2+
= 1.3V, V
FB2-
= -0.1V;
I
IN
+ I
INP
SHDN = GND, V
IN
= 5.5V; I
IN
+ I
INP
FPLL = IN
CONDITIONS
8 x f
BPCLK
12 x f
BPCLK
Hz
16 x f
BPCLK
f
OP2(MAX)
Maximum Operating Frequency
V
-10
0
V
OUT2-
Negative Output Voltage Range
V
V
IN
28
V
OUT2+
Positive Output Voltage Range
V
1.091
1.125
1.159
V
TH_RDY
Power-Ready Trip Level
A
1.2
1.5
1.8
I
LIM(LX1)
LX1 Peak Current Limit
µA
0.1
10
I
LKG(LX1)
LX1 Leakage Current
Ω
0.25
0.5
R
ON(LX1)
LX1 On Resistance
nA
100
I
FB1
FB1 Input Bias Current
16 x f
BPCLK
Operating Frequency
V
2.5
2.8
V
UVLO
V
2.8
5.5
V
IN
Input Supply Range
Undervoltage Lockout
Threshold
24 x f
BPCLK
Hz
32 x f
BPCLK
f
OP1
V
V
IN
5.5
V
OUT1
Output Voltage Range
mA
0.5
2
I
Q
Quiescent Current
µA
0.01
10
I
SD
Shutdown Current
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
0 < I
LX1
< 1.2A
V
1.2125
1.2500
1.275
V
FB1
FB1 Regulation Voltage
DC-DC 1 (PWM MAIN OUTPUT)
DC-DC 2 (PFM)