MAX1624-MAX1625 Просмотр технического описания (PDF) - Maxim Integrated
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производитель
MAX1624-MAX1625
Maxim Integrated
MAX1624-MAX1625 Datasheet PDF : 24 Pages
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High-Speed Step-Down Controllers with
Synchronous Rectification for CPU Power
ELECTRICAL CHARACTERISTICS (continued)
(VDD = VCC = D4 = +5V, PGND = AGND = D0–D3 = 0V, RFREQ = 33.3kΩ, TA = 0°C to +85°C, unless otherwise noted.)
PARAMETER
Maximum Duty Cycle
LG Input Voltage
Logic Input Voltage Low
Logic Input Voltage High
D0–D4 Input Current
LG Input Current
CONDITIONS
RFREQ = 20kΩ
LG = GND (low)
LG = REF (mid)
LG = VCC (high)
D0–D4; VCC = 5.5V
D0–D4; VCC = 4.5V
D0–D4 = 0V, 5V
MIN TYP
85
90
3.3
VCC - 0.2
2.0
MAX
0.2
3.7
0.8
±1
4
CSH, CSL Input Current
FB Input Current
CC1 Output Resistance
CC2 Transconductance
CC2 Clamp Voltage
CC2 Source/Sink Current
DH On-Resistance
DL On-Resistance
DH, DL Source/Sink Current
DH, DL Dead Time
PDRV Trip Level
NDRV Trip Level
PDRV, NDRV Response Time
PDRV, NDRV On-Resistance
PDRV, NDRV Source/Sink Current
PDRV, NDRV Minimum On-Time
Current-Limit Trip Voltage
Soft-Start Time
BST Leakage Current
MAX1624, CSH = CSL = 1.3V,
D0–D3 = 5V, D4 = 0V
MAX1625, CSH = CSL = 1.1V
FB = 1.1V
Minimum
Maximum
100mV overdrive
BST - LX = 4.5V
VDD = 4.5V
DH = DL = 2.5V
With respect to VREF,
FB going low
With respect to VREF,
FB going high
FB overdrive = 5%
VDD = 4.5V
PDRV = NDRV = 2.5V
TA = +25°C
TA = 0°C to +85°C
TA = +25°C
TA = 0°C to +85°C
To full current limit
BST = 12V, LX = 7V, REF = GND
2.4
4
0
-2.75
-3
1.25
1
85
10
1
100
0.7
0.7
2
30
-2
2
75
2
0.5
100
100
1536
50
50
±0.1
3.0
VCC
2
2
-1.25
-1
2.75
3
5
115
50
UNITS
%
V
V
V
µA
µA
µA
µA
kΩ
mmho
V
µA
Ω
Ω
A
ns
%
%
ns
Ω
A
ns
mV
1 / fOSC
µA
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