鈥?/div>
26-pin Copper Case Package
SLTS110
(Revised 10/31/2000)
The PT4498 is a new high-performance
20A 鈥淐urrent Booster鈥?for use with the
PT4484 Excalibur鈩?DC/DC converter.
The PT4498 adds a parallel output stage
to the PT4484, allowing both to operate
in perfect sychronization.
The PT4498 only operates with a
PT4484 and is not a stand-alone product.
Refer the PT4484 data sheet for the perfor-
mance specifications. The booster uses the
same 26-pin case and has the package op-
tions as the companion regulator.
Patent pending on package assembly
PT Series Suffix
(PT1234X)
Case/Pin
Configuration
Vertical Through-Hole
N
Horizontal Through-Hole
A
Horizontal Surface Mount
C
Pin-Out Information
Pin Function
1
2
3
4
5
6
7
8
9
+V
in
-V
in
N/C
V
r
V
a
N/C
N/C
+V
out
+V
out
Pin
10
11
12
13
14
15
16
17
18
Function
+V
out
+V
out
+V
out
+V
out
-V
out
-V
out
-V
out
-V
out
-V
out
Pin Function
19
20
21
22
23
24
25
26
-V
out
-V
sense
N/C
N/C
N/C
N/C
N/C
DRV
Ordering Information
PT4498
o
(For dimensions and PC Board layout, see
Package Styles 1200, 1210 and 1215.)
Standard Application
PROGRAMMING PINS
VID1
VID2
VID3
VID4
REMOTE SENSE (+)
25
24
23
22
7
+V
IN
1
PT4484
2
3
4 5 26
20
8 - 13
+V
OUT
C
IN
Inhibit
-V
IN
+
14-19
LOAD
-V
OUT
REMOTE SENSE (-)
4 5 26
20
1
PT4498
2
8 - 13
C
IN
+
14 - 19
C
OUT
+
Input Capacitors:
Although not necessary for stable operation, Cin will reduce input ripple. Cin = 33碌F is suggested.
Output Capacitors:
A minimum of 330碌F per PT4498 booster module is required for proper operation. Increasing Cout will reduce transients due to large and/or fast
load steps.
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
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