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| MAX1661 Datasheet, PDF (2/16 Pages) Maxim Integrated Products – Active-Matrix Liquid Crystal Display AMLCD Supply | |||
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Active-Matrix Liquid Crystal Display
(AMLCD) Supply
ABSOLUTE MAXIMUM RATINGS
RDY, IN, BPVDD to GND...........................................-0.3V to +6V
FB2-, PGND1, PGND2 to GND ..........................................±0.3V
LX1 to PGND1 ..........................................................-0.3V to +6V
BPVSS to GND .......................................................-3.3V to +0.3V
BPVDD to BPVSS ......................................................-0.3V to +6V
BPDRV to BPVSS ..................................-0.3V to (VBPVDD + 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 (VIN +0.3V)
RDY Sink Current ................................................................20mA
LX2P, LX2N Peak Switch Currents .................................±750mA
Continuous Power Dissipation (TA = +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
Stresses beyond those listed under âAbsolute Maximum Ratingsâ 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.
ELECTRICAL CHARACTERISTICS
(VIN = VINP = 3.3V, SHDN = IN, VBPVDD = 4V, VBPVSS = -1V, PGND1 = PGND2 = FPLL = GND, fBPCLK = 30kHz, TA = 0°C to +70°C,
unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Input Supply Range
VIN
2.8
5.5
V
Undervoltage Lockout
Threshold
VUVLO
2.5
2.8
V
Quiescent Current
IQ
VFB1+ = VFB2+ = 1.3V, VFB2- = -0.1V;
IIN + IINP
Shutdown Current
ISD
SHDN = GND, VIN = 5.5V; IIN + IINP
DC-DC 1 (PWM MAIN OUTPUT)
Output Voltage Range
VOUT1
FPLL = GND
Operating Frequency
fOP1 FPLL = REF
FPLL = IN
FB1 Regulation Voltage
VFB1 0 < ILX1 < 1.2A
FB1 Input Bias Current
IFB1 VFB1 = 1.3V
LX1 On Resistance
RON(LX1)
LX1 Leakage Current
ILKG(LX1) VLX1 = 6V
LX1 Peak Current Limit
ILIM(LX1)
Power-Ready Trip Level
VTH_RDY Rising edge, 2% hysteresis
DC-DC 2 (PFM)
Positive Output Voltage Range VOUT2+
Negative Output Voltage Range VOUT2-
FPLL = GND
Maximum Operating Frequency fOP2(MAX) FPLL = REF
FPLL = IN
0.5
2
mA
0.01
10
µA
VIN
5.5
V
32 x fBPCLK
24 x fBPCLK
Hz
16 x fBPCLK
1.2125 1.2500 1.275
V
100
nA
0.25
0.5
â¦
0.1
10
µA
1.2
1.5
1.8
A
1.091 1.125 1.159
V
VIN
28
V
-10
0
V
16 x fBPCLK
12 x fBPCLK
Hz
8 x fBPCLK
2 _______________________________________________________________________________________
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