MAX1774(2002) Просмотр технического описания (PDF) - Maxim Integrated
Номер в каталоге
Компоненты Описание
Список матч
MAX1774
(Rev.:2002)
(Rev.:2002)
Maxim Integrated
MAX1774 Datasheet PDF : 21 Pages
| |||
Dual, High-Efficiency, Step-Down
Converter with Backup Battery Switchover
ABSOLUTE MAXIMUM RATINGS
IN, SHDNM, MDRV, DBI, LBI, ACI,
CVH to GND .......................................................-0.3V to +30V
IN to CVH, PDRV ......................................................-0.3V to +6V
BIN to CS-.................................................................-0.3V to +6V
LXB to GND ................................................-0.3V to (VBIN+ 0.7V)
PDRV to GND..................................(VCVH - 0.3V) to (VIN + 0.3V)
All Other Pins to GND...............................................-0.3V to +6V
PGND to GND .......................................................-0.3V to +0.3V
Continuous Power Dissipation
28-Pin QSOP (derate 10.8mW/°C above +70°C)........860mW
32-Pin QFN (derate 23.2mW/°C above +70°C) ........1860mW
Operating Temperature .......................................-40°C to +85°C
Storage Temperature.........................................-65°C to +150°C
Temperature (soldering, 10s) ..........................................+300°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
(Figure 1, VIN = VINS +12V, VINC = VCS- = VCS+ = +3.3V, VCORE = +1.8V, TA = 0°C to +85°C, unless otherwise noted. Typical values are at
TA = +25°C.)
PARAMETER
Input Voltage
Input Quiescent Supply Current
SYMBOL
VIN
IIN
CONDITIONS
VFBM = +1.5V, VFBC = +1.5V,
V SHDNM = V SHDNC = +3.3V
MIN TYP MAX UNITS
2.7
28
V
18
40
µA
CS- Quiescent Supply Current
ICS-
VFBM = +1.5V, VFBC = +1.5V,
V SHDNM = V SHDNC = +3.3V
110 220
µA
Core Regulator Quiescent
Supply Current
IINC
VFBM = +1.5V, VFBC = +1.5V,
V SHDNM = V SHDNC = +3.3V
60
105
µA
Backup Mode BIN Quiescent
Supply Current
IN Shutdown Supply Current
MAIN REGULATOR
VBIN = +3.3V, CS- open
IBIN
VFBM = +1.5V, V SHDNM = +3.3V,
V BKOFF = +1.5V, SHDNC = GND
SHDNM = SHDNC = GND
60
105
µA
8
40
µA
Main Output Voltage Adjust
Range
1.25
5.5
V
FBM Regulation Threshold
FBM Input Current
Current-Limit Threshold
Minimum Current-Limit
Threshold
VFBM
IFBM
V(CS+ - CS-) = 0 to +60mV,
VIN = +3.5V to +28V
VFBM = +1.3V
VCS+ - VCS-
VCS+ - VCS-
1.21 1.25 1.29
V
-0.1
0.1
µA
60
80
100
mV
5
15
25
mV
Valley Current Threshold
Zero Current Threshold
PDRV, NDRV Gate Drive
Resistance
CS- to CVL Switch Resistance
PDRV, NDRV Dead Time
VCS+ - VCS-
VCS+ - VCS-
VCS- = +3.3V, IPDRV, INDRV = 50mA
ICVL = 50mA
40
50
60
mV
0
5
15
mV
2
5.5
Ω
4.5
9.5
Ω
50
ns
2 _______________________________________________________________________________________
Share Link: