MAX1773A 查看數據表（PDF） - Maxim Integrated
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MAX1773A Datasheet PDF : 20 Pages
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Power Source Selector for
Dual-Battery Systems
ABSOLUTE MAXIMUM RATINGS
VBATA, VBATB to GND ............................................-0.3V to +20V
VCOMA to GND........................................-0.3V to (VBATA + 0.3V)
VCOMB to GND........................................-0.3V to (VBATB + 0.3V)
VCHGA, VCHGB, VEXTLD, VACDET to GND ..............-0.3V to +30V
VPDS, VDISA, VDISB to GND ...................-0.3V to (VEXTLD + 0.3V)
VDD, VBATSEL, V ACPRES, VBATSTAT, VTCOMP,
VMINV to GND.......................................................-0.3V to +6V
VTHMA, VTHMB (Note 1)............................................ -0.3V to +6V
Continuous Current out of THMA, THMB............................20mA
I ACPRES, IBATSTAT Sink Current..........................................30mA
Continuous Power Dissipation (TA = +70°C)
20-Pin TSSOP (derate 7.0mW/°C above +70°C) ........560mW
Operating Temperature ......................................-40°C to +85°C
Storage Temperature ........................................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Note 1: Signals on THMA and THMB below -0.3V are clamped by internal diodes limit forward diode current to maximum continuous current. When voltage
on these pins is below -0.3V.
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
(VBATA = VBATB = 16.8V, CVDD = 3.3µF, VMINV = 0.93V, VEXTLD = VACDET = 28V, VTCOMP = 3V, VTHMA = VTHMB = 1.65V,
VBATSEL = 0, CCOMA = CCOMB = CDISA = CDISB = CCHGA = CCHGB = CPDS = 5nF, TA = 0°C to +85°C, unless otherwise noted.)
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
EXTLD Supply Voltage Range
BATA, BATB Supply Voltage Range
VEXTLD > VBATA and VBATB
4.75
28.00
V
4.75
19.00
V
BATA, BATB Quiescent Current
(Current from the higher voltage supply)
BATA, BATB Quiescent Current
(Current from the lower voltage supply)
VBATA = 4.75V to 19V,
VBATB = 4.75V to 19V,
IVDD = 0
VBATA = 4.75V to 19V,
VBATB = 4.75V to 19V,
IVDD = 0
VACDET = 28V
VACDET = 2.2V to
VBATA and VBATB
VACDET = 28V
VACDET = 2.2V to
VBATA and VBATB
5
8
µA
40
70
5
8
µA
8
13
EXTLD Quiescent Current
VACDET = 28V, VEXTLD = 28V
VACDET= 2.2V to VBATA and VBATB,
VEXTLD = 16V
35
55
µA
5
8
LINEAR REGULATOR
VDD Output Voltage
VDD Power-Supply Rejection Ratio
IVDD = 0 to 100µA
IVDD = 100µA to 1mA
VBATA or VBATB = 5V to 19V, VEXTLD = 5V
VBATA = VBATB = 5V, VEXTLD = 5V to 28V
VBATA, VBATB, or VEXTLD = 5V to 19V,
sawtooth at 10V/µs, other supplies = 12V
3.234 3.3 3.367
V
3.168 3.3 3.432
1.0
1.0
mV/V
1
VDD Undervoltage Lockout
COMPARATORS
Hysteresis is typically 50mV
2.0
2.5
3.0
V
TCOMP Undervoltage Lockout
(Note 2)
0
1.1
V
THM_ Input Voltage Range
0
5.5
V
THM_ Input Leakage Current
TCOMP Input Voltage Range
VTHM_ = 5.5V
0.1
100
nA
VTHMA = VTHMB = 0 to 5.5V
0
5.5
VTHMA = VTHMB = 0 to 5.5V, VBATA = VBATB
= VEXTLD = 4.75V
0
V
4.3
2 _______________________________________________________________________________________
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