MAX1774EMJ(2002) 查看數據表（PDF） - Maxim Integrated
零件编号
产品描述 (功能)
比赛名单
MAX1774EMJ
(Rev.:2002)
(Rev.:2002)
Maxim Integrated
MAX1774EMJ Datasheet PDF : 21 Pages
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Dual, High-Efficiency, Step-Down
Converter with Backup Battery Switchover
ELECTRICAL CHARACTERISTICS (continued)
(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
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
SHDNM, SHDNC Input Low
Current
SHDNM = SHDNC = GND
-1
1
µA
SHDNC Input High Current
SHDNM Input High Current
V SHDNC = +5.5V
V SHDNM = +5V
5
µA
2
25
µA
ELECTRICAL CHARACTERISTICS
(Figure 1, VIN = VINS = +12V, VINC = VCS- = VCS+ = +3.3V, VCORE = +1.8V, TA = -40°C to +85°C, unless otherwise noted.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
Input Voltage
VIN
2.7
Input Quiescent Supply Current
IIN
VFBM = +1.5V, VFBC = +1.5V, VSHDNM =
V SHDNC = +3.3V
CS- Quiescent Supply Current
ICS-
VFBM = +1.5V, VFBC = +1.5V, VSHDNM =
V SHDNC = +3.3V
Core Regulator Quiescent
Supply Current
IINC
VFBM = +1.5V, VFBC = +1.5V, VSHDNM =
V SHDNC = +3.3V
Backup Mode BIN Quiescent
Supply Current
VBIN = +3.3V, CS- open
IBIN
VFBM = +1.5V, VSHDNM = +3.3V,
V BKOFF = +1.5V, SHDNC = GND
IN Shutdown Supply Current
SHDNM = SHDNC = GND
MAIN REGULATOR
Main Output Voltage Adjust
1.25
Range
FBM Regulation Threshold
VFBM
V(CS+ - CS-) = 0 to +60mV,
VIN = +3.5V to +28V
1.21
FBM Input Current
IFBM
VFBM = +1.3V
-0.1
Current-Limit Threshold
VCS+ - VCS-
60
Minimum Current-Limit
Threshold
VCS+ - VCS-
5
Valley Current Threshold
VCS+ - VCS-
40
Zero Current Threshold
VCS+ - VCS-
0
PDRV, NDRV Gate Drive
Resistance
VCS- = +3.3V, IPDRV, INDRV = 50mA
CS- to CVL Switch Resistance
ICVL = 50mA
Maximum Duty Cycle
100
Minimum On-Time
200
Minimum Off-Time
200
MAX UNITS
28
V
40
µA
220
µA
105
µA
110
µA
40
µA
5.5
V
1.29
V
0.1
µA
100
mV
25
mV
60
mV
15
mV
5.5
Ω
9.5
Ω
%
650
ns
650
ns
_______________________________________________________________________________________ 5
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