Datasheet

MAX1763
1.5A, Low-Noise, 1MHz, Step-Up
DC-DC Converter
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(CLK/SEL = ONB = FB = PGND = GND, ISET = REF, OUT = POUT, V
ONA
= V
AIN
= V
OUT
= 3.6V, T
A
= 0°C to +85°C, unless other-
wise 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.
ONA, ONB, AO, OUT to GND.......................................0.3V, +6V
PGND to GND.....................................................................±0.3V
LX to PGND ............................................-0.3V to (V
POUT
+ 0.3V)
CLK/SEL, REF, FB, ISET, POUT,
AIN to GND.........................................-0.3V to (V
OUT
+ 0.3V)
POUT to OUT ......................................................................±0.3V
Continuous Power Dissipation
16-Pin QSOP (derate 8.7mW/°C above +70°C)...........667mW
16-Pin TSSOP-EP (derate 19mW/°C above +70°C) ...........1.5W
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow) .......................................+260°C
PARAMETER CONDITIONS MIN TYP MAX UNITS
DC-DC CONVERTER
Input Voltage Range (Note 1) 0.7 5.5 V
Minimum Startup Voltage
(Note 2)
I
LOAD
< 1mA, T
A
= +25°C 0.9 1.1 V
Temperature Coefficient of
Startup Voltage
I
LOAD
< 1mA -2 mV/°C
Frequency in Startup Mode V
OUT
= 1.5V 125 500 1000 kHz
Internal Oscillator Frequency CLK/SEL = OUT 0.8 1 1.2 MHz
Oscillator Maximum Duty Cycle
(Note 3)
80 86 90 %
External Clock Frequency Range 0.5 1.2 MHz
Output Voltage
V
FB
< 0.1V, CLK/SEL = OUT, includes load regulation
for 0 < I
LX
< 1.1A
3.17 3.3 3.38 V
FB Regulation Voltage
Adjustable output, CLK/SEL = OUT, includes load
regulation for 0 < I
LX
< 1.1A
1.215 1.245 1.270 V
FB Input Current V
FB
= 1.35V 0.01 100 nA
Load Regulation CLK/SEL = OUT, 0 < I
LX
< 1.1A -1.0 %
Output Voltage Adjust Range 2.5 5.5 V
Output Voltage Lockout
Threshold (Note 4)
Rising edge 2.00 2.15 2.30 V
ISET Input Leakage Current V
ISET
= 1.25V 0.01 50 nA
Supply Current in Shutdown V
ONB
= 3.6V, V
ONA
= 0V 1 10 µA
No-Load Supply Current, Low-
Power Mode (Note 5)
CLK/SEL = GND, AIN = OUT 110 200 µA
No-Load Supply Current, Low-
Noise Mode
CLK/SEL = OUT 2.5 mA
Gain Block Supply Current V
AIN
< (V
OUT
- 1.4V), gain block enabled 25 50 µA