MAX1809 データシートの表示（PDF） - Maxim Integrated
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MAX1809 Datasheet PDF : 17 Pages
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3A, 1MHz, DDR Memory Termination Supply
ELECTRICAL CHARACTERISTICS (continued)
(VIN = VCC = 3.3V, VEXTREF = 1.1V, TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
SS Source Current
SS Sink Current
SHDN Input Current
SHDN Logic Levels
Maximum Output RMS Current
SYMBOL
CONDITIONS
ISS
ISS
VSS = 1V
V SHDN = 0, VCC
VIL
VIH
IOUT(RMS)
MIN TYP MAX
4
5
6
1
50
-1
+1
0.8
2
3.1
UNITS
µA
mA
µA
V
ARMS
ELECTRICAL CHARACTERISTICS
(VIN = VCC = 3.3V, VEXTREF = 1.1V, TA = -40°C to +85°C, unless otherwise noted.) (Note 4)
PARAMETER
Input Voltage
Feedback Voltage Accuracy
(VFB - VEXTREF)
External Reference Voltage
Range
Reference Voltage
PMOS Switch
On-Resistance
NMOS Switch
On-Resistance
Current-Limit Threshold
FB Input Bias Current
Off-Time
SYMBOL
VIN, VCC
CONDITIONS
VIN = VCC = 3V to 5.5V, ILOAD = 0,
VEXTREF = 1.25V
VEXTREF VIN = VCC = 3 V to 5.5V
VREF
RPMOS
RNMOS
ILIMIT
IFB
tOFF
ILX = 0.5A
VIN = 4.5V
VIN = 3V
ILX = 0.5A
VIN = 4.5V
VIN = 3V
VIN > VLX
VFB = VEXTREF + 0.1V
RTOFF = 110kΩ
MIN TYP MAX UNITS
3.0
5.5
V
-24
+24
mV
VREF -
0.01V
1.067
3.3
0.85
VIN -
1.9V
V
1.133
V
200
mΩ
250
150
mΩ
200
4.9
A
300
nA
1.15
µs
Note 2: The output voltage will have a DC-regulation level lower than the feedback error comparator threshold by 50% of the ripple.
Note 3: Recommended operating frequency, not production tested.
Note 4: Specifications from 0°C to -40°C are guaranteed by design, not production tested.
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