MAX1864 Maxim, MAX1864 Datasheet - Page 5

• Manufacturer Part Number: MAX1864
• Description: xDSL/Cable Modem Triple/Quintuple Output Power Supplies
• Manufacturer: Maxim

ELECTRICAL CHARACTERISTICS (continued)
(V
(Circuit of Figure 1, V
Note 1: Connect VL to IN for operation with V
Note 2: See Output Voltage Selection section.
Note 3: The internal 5V linear regulator (VL) powers the thermal shutdown block. Shorting VL to GND disables thermal shutdown.
Note 4: Specifications to -40°C are guaranteed by design, not production tested.
POWER GOOD (POK)
OUT Trip Level (Preset Mode)
FB Trip Level
(Adjustable Mode)
FB2, FB3, FB4 Trip Level
FB5 Trip Level
IN
100
= 12V, ILIM = FB = GND, V
80
90
70
50
60
0.01
PARAMETER
EFFICIENCY vs. LOAD CURRENT
V
xDSL/Cable Modem Triple/Quintuple Output
IN
= 6.5V
(PRESET MODE)
0.1
LOAD CURRENT (A)
_______________________________________________________________________________________
IN
= 12V, V
V
IN
V
IN
= 24V
V
IN
= 18V
V
1
IN
= 12V
= 8V
BST
V
OUT
OUT
= 3.3V
- V
SYMBOL
= 3.3V, T
LX
10
= 5V, T
IN
A
= +25°C, unless otherwise noted.)
< 5V.
3.33
3.32
3.31
3.30
3.29
3.28
3.27
A
FB = GND, falling edge, 1% hysteresis (typ)
Falling edge, 1% hysteresis (typ)
Falling edge, 1% hysteresis (typ)
Rising edge, 35mV hysteresis (typ)
= -40°C to +85°C, unless otherwise noted.) (Note 4)
0
OUTPUT VOLTAGE vs. LOAD CURRENT
0.5
(PRESET MODE)
1.0
LOAD CURRENT (A)
CONDITIONS
1.5
Typical Operating Characteristics
2.0
2.5
3.0
Power Supplies
100
80
90
70
50
60
0.01
1.058
1.058
2.85
MIN
325
V
EFFICIENCY vs. LOAD CURRENT
IN
= 6.5V
(ADJUSTABLE MODE)
0.1
LOAD CURRENT (A)
V
IN
V
MAX
3.15
1.17
1.17
IN
675
V
= 24V
V
IN
IN
= 18V
1
= 8V
= 12V
V
OUT
= 5.0V
UNITS
mV
V
V
V
10
5