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 -40°C to +85°C, unless otherwise noted.)
(Note 2)
PARAMETER
Maximum Duty Cycle
Minimum On-Time
Minimum Off-Time
CORE REGULATOR
Input Voltage Range
INC Undervoltage Lockout
Core Output Voltage Adjust
Range
Maximum Core Load Current
FBC Regulation Threshold
FBC Input Current
Dropout Voltage (INC to LXC)
LXC Leakage Current
LXC P-Channel, N-Channel
On-Resistance
LXC P-Channel Current Limit
LXC P-Channel Minimum
Current
LXC N-Channel Valley Current
LXC N-Channel Zero-Crossing
Current
Maximum Duty Cycle
Minimum On-Time
Minimum Off-Time
REFERENCE
Reference Voltage
Reference Load Regulation
Reference Line Regulation
Reference Sink Current
CVL, CVH REGULATORS
CVL Output Voltage
CVH Output Voltage
CVL Undervoltage Lockout
SYMBOL
CONDITIONS
VINC
VINC rising
VINC falling
VFBC
IFBC
ILXC
(Note 1)
VINC = +2.5V to +5.5V, IOUTC = 0 to 200mA
VFBC = +1.3V
IOUTC = 400mA
VINC = +5.5V, VLXC = 0 to +5.5V
VREF
IREF
IREF = 0 to 50µA
VCS- = +2.5V to +5.5V,
IREF = 50µA
VCVL
VCVH
ICVL = 50mA, VIN = +2.7V, VCS- = 0
VIN = +4V, ICVH = 25mA
VIN = +12V, ICVH = 50mA
VCVL rising
VCVL falling
MIN
100
200
200
2.6
2.39
2.29
1.0
1
0.97
-0.1
-10
1200
100
880
35
100
150
150
1.22
10
2.6
2.40
2.30
MAX
650
650
UNITS
%
ns
ns
5.5
V
2.55
V
2.45
5.0
V
A
1.03
V
0.1
µA
0.2
V
10
µA
0.5
Ω
3050 mA
400
mA
2450 mA
175
mA
%
670
ns
670
ns
1.27
V
10
mV
5
mV
µA
3.1
V
VIN - 2.8 V
VIN - 3.7
2.55
V
2.45
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