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MAX1917 데이터시트(PDF) 5 Page - Maxim Integrated Products

부품명 MAX1917
상세설명  Tracking, Sinking and Sourcing, Synchronous Buck Controller for DDR Memory and Termination Supplies
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제조업체  MAXIM [Maxim Integrated Products]
홈페이지  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX1917 데이터시트(HTML) 5 Page - Maxim Integrated Products

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Tracking, Sinking and Sourcing, Synchronous Buck
Controller for DDR Memory and Termination Supplies
_______________________________________________________________________________________
5
ELECTRICAL CHARACTERISTICS (continued)
(V+ = 12V, VEN/HSD = VDDR = 2.5V, CVL = 4.7µF, CVTTR = 1µF, CREF = 0.22µF, VFSEL = 0, ILIM = VL, PGND = LX = POK = GND,
BST = VL. Specifications are for TA = -40°C to +85°C, unless otherwise specified.) (Note 2)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Reference UVLO
V+ = VL = 5V
1.5
1.7
V
VTTR
VTTR Output Voltage Range
0
1.8
V
IVTTR = -5mA to +5mA
49.5
50.5
IVTTR = -25mA to +25mA, VDDR = 1.8V
49
51
VTTR Output Accuracy
IVTTR = -25mA to +25mA, VDDR = 3.6V
49.5
50.5
%VDDR
OSCILLATOR
FSEL = VL
2.18
2.83
FSEL not connected
1.45
1.89
FSEL = REF
1.09
1.41
On Time (Note 1)
FSEL = GND
0.82
1.00
µs
Minimum Off Time (Note 1)
400
ns
CURRENT LIMIT
LX to PGND, ILIM = VL
85
110
LX to PGND, RILIM = 100k
35
60
Current-Limit Threshold
(Positive Direction)
LX to PGND, RILIM = 400k
160
230
mV
Current-Limit Threshold
(Negative Direction)
LX to PGND, ILIM = VL, with percentage of positive
current-limit threshold
-90
-130
%
VL REGULATOR
Output Voltage
5.5V < V+ < 14V; 1mA < IVL < 35mA
4.8
5.2
V
RMS Output Current
35
mA
Bypass Capacitor
ESR < 100m
2.2
µF
FSEL LOGIC
Logic Input Current
3µA
Logic GND Level
0.5
V
Logic REF Level
FSEL = VREF
1.65
2.35
V
Logic Float Level
FSEL floating
3.15
3.85
V
Logic VL Level
FSEL = VL
VL - 0.4
V
EN/HSD LOGIC
EN/HSD Shutdown Current
IEN/HSD for VEN/HSD = 0.8V
0.5
3.0
µA
Logic High
VL = V+ = 4.5V to 5.5V, 100mV hysteresis
1.45
V
Logic Low
VL = V+ = 4.5V to 5.5V
0.8
V
POWER-OK OUTPUT
Upper VTT Threshold
110
114
%VDDR
/2
Lower VTT Threshold
86
90
%VDDR
/2


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