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MAX1809EEE Datasheet(PDF) 4 Page - Maxim Integrated Products

Part # MAX1809EEE
Description  3A, 1MHz, DDR Memory Termination Supply
PDF  17 Pages
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Manufacturer  MAXIM [Maxim Integrated Products]
Direct Link  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX1809EEE Datasheet(HTML) 4 Page - Maxim Integrated Products

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3A, 1MHz, DDR Memory Termination Supply
4
_______________________________________________________________________________________
50
65
60
55
70
75
80
85
90
95
100
EFFICIENCY vs. OUTPUT CURRENT
(SOURCING)
OUTPUT CURRENT (A)
03
2
1
RDROOP = 0
Ω
VIN = 5V,
VOUT = 2.5V
VIN = 3.3V,
VOUT = 1.25V
VIN = 5V,
VOUT = 1.25V
EFFICIENCY vs. OUTPUT CURRENT
(SINKING)
OUTPUT CURRENT (A)
03
2
1
50
60
55
75
70
65
90
85
80
95
RDROOP = 0
Ω
VIN = 5V,
VOUT = 1.25V
VIN = 5V,
VOUT = 2.5V
VIN = 3.3V,
VOUT = 1.25V
-2.2
-2.6
-3.0
-1.8
-1.4
-0.6
-1.0
-0.2
-3
-2
-1
0123
NORMALIZED OUTPUT ERROR
vs. OUTPUT CURRENT
OUTPUT CURRENT (A)
VIN = 3.3V
VIN = 5V
4
0
12
8
20
16
24
02
3
1
456
NO-LOAD
SUPPLY CURRENT vs. SUPPLY VOLTAGE
VIN (V)
0
1.0
0.5
2.0
1.5
3.0
2.5
3.5
4.5
4.0
5.0
0
100 150 200
50
250 300 350
450
400
500
OFF-TIME vs. RTOFF
RTOFF (k
Ω)
0
400
200
800
600
1000
1200
SWITCHING FREQUENCY
vs. OUTPUT CURRENT
OUTPUT CURRENT (A)
-3
-1
-2
0123
VIN = 5V
VIN = 3.3V
STARTUP AND SHUTDOWN
0A
0V
0V
0V
1A/div
VOUT
1V/div
VSHDN
5V/div
IIN
1ms/div
VSS
2V/div
VIN = 3.3V, ROUT = 0.5
Ω
LOAD-TRANSIENT RESPONSE
0A
0V
50mV/div
IOUT
5A/div
V(LX)
5V/div
VOUT
(AC-COUPLED)
10
µs/div
VEXTREF = 1.25V, VIN = 3.3V, IOUT = -2A to +2A to -2A
RDROOP = 0
Ω
Typical Operating Characteristics
(Circuit of Figure 1, VOUT = 1.25V, for VIN = 5V: L = 1µH, RTOFF = 130k
Ω; for VIN = 3.3V: L = 0.68µH, RTOFF = 73.2kΩ.)



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