鈥?/div>
Description
The PT4840 Excalibur鈩?power
modules are a series of isolated triple-
output DC/DC converters that
operate from a standard (鈥?8V) central
office supply. Rated for up to 65W,
these regulators are appropriate for
powering both analog and mixed-
signal circuitry. A typical application
is a chip-set for an ADSL/DSL line
card.
The output voltage combinations
offered by the PT4840 series provide
power for a low-voltage processor
core, the associated digital circuitry,
and analog support circuitry.
The PT4840 series incorporates
many features to simplify system
integration. These include a flexible
On/Off control, over-temperature
protection, and an input under-
voltage lock-out. All outputs are
current limited and short-circuit
protected. In addition, the low-
voltage outputs for processor core
and digital circuitry meet the power-
up and power-down sequencing
requirements of popular DSP ICs.
The PT4840 series is housed in
a space-saving solderable case. The
module requires no external heat sink
and can occupy as little as 1.97 in
2
of
PCB area.
Ordering Information
PT4841o
= +15/+3.3/+1.5V (65W)
PT4842o
= +12/+3.3/+1.8V (62W)
PT Series Suffix
(PT1234
x
)
Case/Pin
Configuration
Vertical
Horizontal
SMD
Order
Suffix
Package
Code
(EKD)
(EKA)
(EKC)
N
A
C
(Reference the applicable package code drawing for
the dimensions and PC layout)
Typical Application
Vo
2
Adjust
Vo
3
Adjust
21
Vo
3
adj
+V
IN
1
+V
IN
17
Vo
2
adj
Vo
1
11
+15VDC
C
OUT1
PT4841
COM 12,13
4
C
IN
3
EN 1
EN 2
Vo
2
Vo
3
鈥揤
IN
2
鈥揤
IN
15,16
22,23
DSL/ADSL
IC Chip Set
+3.3VDC
+1.5VDC
C
OUT2
C
OUT3
COM 18鈥?0
Cin = Optional
Cout = Optional; See specifications
EN1 & EN2 pins: See On/Off Enable Logic
For technical support and more information, see inside back cover or visit www.ti.com