MAX1774EEI 查看數據表（PDF） - Maxim Integrated
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MAX1774EEI 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
REFERENCE
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Reference Voltage
Reference Load Regulation
Reference Line Regulation
Reference Sink Current
CVL, CVH REGULATORS
CVL Output Voltage
CVL Switchover Threshold
VREF
IREF = 0 to 50µA
VCS- = +2.5V to +5.5V, IREF = 50µA
VCVL
ICVL = 50mA, VCS- = 0
ICVL = 50mA, VCS- = +3.3V
CS- rising, hysteresis = 100mV typical
1.23 1.25 1.27
V
10
mV
5
mV
10
µA
2.6
2.8
3.1
V
3.2
2.40 2.47 2.55
V
CVH Output Voltage
VCVH
VIN = +4V, ICVH = 25mA
VIN = +12V, ICVH = 50mA
VIN - VIN -
3.4
2.8
V
VIN - VIN -
4.2
3.7
CVH Switchover Threshold
VIN
CVL Undervoltage Lockout
LOW-VOLTAGE COMPARATORS
VIN rising, hysteresis = 350mV typ
VCVL rising
VCVL falling
5.5
V
2.40 2.47 2.55
V
2.30 2.37 2.45
Backup Regulator Shutdown
Threshold
BKOFF Input Bias Current
LBI Threshold
DBI Threshold
BKUP Low-Input Threshold
LBI, DBI Input Leakage Current
LBO, BKUP, ACO, MDRV
Output Low
V BKOFF
VLBI
VDBI
V BKOFF rising
V BKOFF falling
V BKOFF = +5.5V
VLBI falling, hysteresis = 50mV typical
VDBI falling, hysteresis = 50mV typical
VLBI = VDBI = +1.3V
ISINK = 1mA
0.51 0.55 0.59
V
0.46 0.50 0.54
1
µA
1.17 1.20 1.23
V
1.17 1.20 1.23
V
0.4
V
100
nA
0.4
V
LBO, BKUP, ACO, MDRV
Output Leakage Current
VLBI = +1.3V, VACI = +12V, VACO =
VLBO = VBKUP = +5.5V, VMDRV = +28V
1.0
µA
ACI Threshold
ACI Input Leakage Current
INS Input Leakage Current
LOGIC INPUTS
SHDNM, SHDNC Input Low
Voltage
VACI – VINS, ACI falling
VACI = +1.3V
VINS = +3.3V
0.22 0.35
V
100
nA
1.5
10
µA
0.4
V
SHDNM, SHDNC Input High
Voltage
2.0
V
4 _______________________________________________________________________________________
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