MAX1775 データシートの表示（PDF） - Maxim Integrated
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MAX1775 Datasheet PDF : 15 Pages
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Dual-Output Step-Down
DC-DC Converter for PDA/Palmtop Computers
ELECTRICAL CHARACTERISTICS (continued)
(VIN = +12V, VMAIN = VINC = VCS- = VCS+ = +3.3V, VCORE = +1.8V, Circuit of Figure 4, TA = 0°C to +85°C, unless otherwise noted.
Typical values are at TA = +25°C.)
PARAMETER
LOGIC INPUTS
SHDNM, SHDNC Input Low
Voltage
SHDNM, SHDNC Input High
Voltage
SHDNM, SHDNC Input Low
Current
SHDNC Input High Current
SHDNM Input High Current
SYMBOL
CONDITIONS
SHDNM = SHDNC = GND
V SHDNC = +5.5V
V SHDNM = +5V
V SHDNM = +28V
MIN TYP MAX UNITS
0.4
V
2.0
V
-1
1
µA
5
µA
2
µA
15
30
ELECTRICAL CHARACTERISTICS
(VIN = +12V, VMAIN = VINC = VCS- = VCS+ = +3.3V, VCORE = +1.8V, Circuit of Figure 4, TA -40°C to +85°C, unless otherwise noted.)
(Note 2)
PARAMETER
Input Voltage
Input Quiescent Supply Current
CS- Quiescent Supply Current
Core Regulator Quiescent
Supply Current
IN Shutdown Supply Current
MAIN REGULATOR
Main Output Voltage Adjust
Range
SYMBOL
VIN
IIN
CONDITIONS
VFBM = +1.5V, VFBC = +1.5V,
VSHDNM = VSHDNC = +3.3V
ICS-
VFBM = +1.5V, VFBC = +1.5V,
VSHDNM = VSHDNC = +3.3V
IINC
VFBM = +1.5V, VFBC = +1.5V,
VSHDNM = VSHDNC = +3.3V
SHDNM = SHDNC = GND
MIN
MAX UNITS
2.7
28
V
30
µA
220
µA
120
µA
30
µA
1.25
5.5
V
FBM Regulation Threshold
FBM Input Current
Current-Limit Threshold
Minimum Current-Limit Threshold
Valley Current Threshold
Zero Current Threshold
PDRV, NDRV Gate Drive
Resistance
CS- to CVL Switch Resistance
VFBM
IFBM
VCL
V(CS+ - CS-) = 0 to +60mV, VIN = +2.7V to +28V
VFBM = +1.3V
VCS+ - VCS-
VCS+ - VCS-
VCS+ - VCS-
VCS+ - VCS-
VCS- = +3.3V
ICVL = 50mA
1.21
-0.1
60
6
40
0
1.29
V
0.1
µA
100
mV
24
mV
60
mV
15
mV
4.4
Ω
8
Ω
4 _______________________________________________________________________________________
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