MAX1765 Просмотр технического описания (PDF) - Maxim Integrated
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MAX1765 Datasheet PDF : 19 Pages
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800mA, Low-Noise, Step-Up DC-DC Converter
with 500mA Linear Regulator
ABSOLUTE MAXIMUM RATINGS
ONA, ONB, ONL, TRACK, OUT, INL to GND..............-0.3V, +6V
PGND to GND.....................................................................±0.3V
LX to GND ...............................................-0.3V to (POUT + 0.3V)
OUTL to GND ..............................................-0.3V to (INL + 0.3V)
CLK/SEL, REF, FB, FBL, ISET, POUT
to GND...................................................-0.3V to (OUT + 0.3V)
OUTL Short Circuit .....................................................Continuous
Continuous Power Dissipation (TA = +70°C)
16-Pin QSOP (derate 8.3mW/°C above +70°C)...........667mW
16-Pin TSSOP-EP (derate 19mW/°C above +70°C) ....1500mW
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
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.
ELECTRICAL CHARACTERISTICS
(VOUT = VPOUT = VINL = VONA = VONL = 3.6V, CLK/SEL = FBL = ONB = TRACK = PGND = GND, ISET = REF (bypassed with
0.22µF), LX = open, OUTL = open (bypassed with 4.7µF), TA = 0°C to +85°C, unless otherwise noted. Typical values are at
TA = +25°C.)
PARAMETER
DC-DC CONVERTER
Input Voltage Range
INL Voltage Range
Minimum Startup Voltage
Temperature Coefficient of
Startup Voltage
FB Regulation Voltage
FB Input Leakage Current
Output Voltage Adjust Range
Load Regulation
OUT Voltage in Track Mode
Frequency in Startup Mode
Startup to Normal Mode
Transition Voltage
ISET Input Leakage Current
Supply Current in Normal Mode
(Note 3)
SYMBOL
CONDITIONS
(Note 1)
(Note 1)
ILOAD < 1mA, TA = +25°C, Figure 2
ILOAD < 1mA
VFB
CLK/SEL = OUT, 0 < ILX < 0.55A
VFB = 1.35V
CLK/SEL = OUT, 0 < ILOAD < 800mA
VOUTL > 2.0V, INL = POUT
fLX
VOUT = 1.5V
Rising edge only (Note 2)
VISET = 1.25V
CLK/SEL = ONL = GND, no load
MIN TYP MAX UNITS
0.7
5.5
V
2.3
5.5
V
0.9
1.1
V
-2
mV/°C
1.215 1.250 1.275
V
0.01 100
nA
2.5
5.5
V
-1
%
VOUTL VOUTL VOUTL
V
+ 0.4 + 0.5 + 0.6
125
1000 kHz
2.00 2.15 2.30
V
0.01
50
nA
100
200
μA
Supply Current in Low-Noise
PWM Mode (Note 3)
Supply Current in Shutdown
CLK/SEL = OUT,
no load
VFB = 1.5V
FB = GND (LX switching)
ONA = ONL = GND, ONB = OUT
130
200
μA
2.5
mA
1
10
μA
2 _______________________________________________________________________________________
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