MAX1864TEEE+ Maxim Integrated Products, MAX1864TEEE+ Datasheet - Page 23

• Manufacturer Part Number: MAX1864TEEE+
• Description: IC PWR SUPPLY CONTROLLER 16QSOP
• Manufacturer: Maxim Integrated Products

Specifications of MAX1864TEEE+

• Applications: Power Supply Controller
• Voltage - Input: 4.5 ~ 28 V
• Current - Supply: 1mA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-QSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Supply: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

5) Ensure all feedback connections are short and
6) When trade-offs in trace lengths must be made, it’s
7) Route high-speed switching nodes away from sensi-
The linear regulator controllers can be configured to
regulate high output voltages by adding a cascode
transistor to buffer the base-drive output. For example,
to generate an output voltage between 30V and 60V,
add a 2N5550 high-voltage NPN transistor as shown in
Figure 8a where V
20V that can source at least 1mA. R
cascode transistor by decreasing the voltage across
the transistor when the pass transistor saturates.
Similarly, to regulate a negative output voltage between
-20V and -120V, add a 2N5401 high-voltage PNP tran-
sistor as shown in Figure 8b.
direct. Place the feedback resistors as close to the
MAX1864/MAX1865 as possible.
preferable to allow the inductor charging path to be
made longer than the discharge path. For example,
it is better to allow some extra distance between the
input capacitors and the high-side MOSFET than to
allow distance between the inductor and low-side
MOSFET or between the inductor and output filter
capacitor.
tive analog areas (B_, FB_, COMP, ILIM).
xDSL/Cable Modem Triple/Quintuple Output
BIAS
______________________________________________________________________________________
is a DC voltage between 3V and
Regulating High Voltage
DROP
protects the
TRANSISTOR COUNT: 1617
PROCESS: BiCMOS
Pin Configurations (continued)
TOP VIEW
COMP
POK
OUT
FB2
FB3
FB4
FB
B2
B3
B4
Power Supplies
10
1
2
3
4
5
6
7
8
9
20 QSOP
MAX1865
Chip Information
20
19
18
17
16
15
14
13
12
11
IN
VL
BST
DH
LX
DL
GND
ILIM
FB5
B5
23