MAX1864 Maxim, MAX1864 Datasheet - Page 4

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

xDSL/Cable Modem Triple/Quintuple Output
Power Supplies
4
ELECTRICAL CHARACTERISTICS
(V
GENERAL
Operating Input Voltage Range
(Note 1)
Quiescent Supply Current
VL REGULATOR
Output Voltage
Power-Supply Rejection
Undervoltage Lockout Trip Level
DC-DC CONTROLLER
Output Voltage (Preset Mode)
Feedback Set Voltage
(Adjustable Mode)
Current-Sense Amplifier Voltage
Gain
Current-Limit Threshold
(Internal Mode)
Current-Limit Threshold
(External Mode)
Switching Frequency
Maximum Duty Cycle
POSITIVE ANALOG GAIN BLOCKS
FB2, FB3, FB4 Regulation
Voltage
FB2, FB3, FB4 to B_
Transconductance
NEGATIVE ANALOG GAIN BLOCK
FB5 Regulation Voltage
FB5 to B5 Transconductance
IN
_______________________________________________________________________________________
= 12V, ILIM = FB = GND, V
PARAMETER
BST
- V
SYMBOL
V
V
V
∆V
∆V
PSRR
D
VALLEY
VALLEY
V
V
A
f
LX
UVLO
V
OSC
I
VL
OUT
MAX
SET
LIM
IN
FB
FB5
IN
= 5V, T
_
V
= V
V
6V < V
V
VL rising, 3% hysteresis (typ)
FB = GND
FB = COMP
V
V
V
MAX186_T
MAX186_U
V
1mA (sink)
V
0.5mA to 5mA (sink)
V
(source)
V
A
FB
FB5
IN
IN
ILIM
ILIM
B2
B2
B5
B5
= -40°C to +85°C, unless otherwise noted.) (Note 4)
FB3
= 6V to 28V
- V
= 0, V
= V
= V
= V
= 0, I
= -0.1V
= 5V
= 2.5V
LX
IN
= V
B3
B3
OUT
< 28V, 0.1mA < I
= 250mV
B5
OUT
= V
= V
FB4
- 2V, V
= 0.5mA to 5mA (source)
B4
B4
= 4V, V
= 1.5V,
CONDITIONS
= 5V, I
= 5V, I
OUT
FB2
= 3.5V, I
B2
B2
LOAD
= I
= I
B3
B3
MAX1864
MAX1865
B5
<20mA
= I
= I
= 1mA
B4
B4
=
=
3.247
1.211
1.215
4.75
4.12
MIN
150
400
160
4.5
-25
80
74
3
3.380
1.261
1.265
MAX
-2.25
5.25
5.68
350
660
240
120
+10
-30
28
90
2
3
3
4
UNITS
kHz
mA
V/V
mV
mV
mV
mV
%
%
%
V
V
V
V
V
V