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Internal Sequencing
Short Circuit Protection
23-pin Space-Saving Package
Solderable Copper Case
Ideal Power Source for DSPs
Description
The PT6935 Excalibur鈩?series of
power modules are dual output integrated
switching regulators (ISRs) designed to
power the latest mixed signal ICs. The
dual output provides power for both the
digital I/O logic and a DSP core from a
single module. Both output voltages are
internally sequenced during power-up
and power-down to comply with the
requirements of the latest DSP chips. Each
output is independently adjustable or can be
set to at least one alternative bus voltage
with a simple pin-strap. The modules are
made available in a space-saving solder-
able case. Features include an output
current limit and short-circuit protec-
tion.
Ordering Information
PT6935o
PT6936o
PT6937o
PT6938o
PT6939o
=
=
=
=
=
+2.5/1.8
+3.3/2.5
+3.3/1.8
+3.3/1.2
+2.5/1.2
Volts
Volts
Volts
Volts
Volts
Pin-Out Information
Pin Function
1
2
3
4
5
6
Vo
1
Sense
No Connect
STBY
V
in
V
in
V
in
GND
GND
GND
GND
GND
Vo
1
Pin
13
14
15
16
17
18
19
20
21
22
23
Function
Vo
1
Vo
1
Vo
1
Vo
1
Adjust *
No Connect
Vo
2
Vo
2
Vo
2
Vo
2
Vo
2
Sense
Vo
2
Adjust *
PT Series Suffix
(PT1234x)
Case/Pin
Configuration
Vertical
Horizontal
SMD
Order
Suffix
Package
Code
(ELF)
(ELG)
(ELH)
7
8
9
10
11
12
N
A
C
(Reference the applicable package code drawing
for the dimensions and PC layout)
* Vo
1
and Vo
2
can be pin-strapped to another
voltage. See application note on output
voltage adjustment.
Standard Application
V o
2
Sense
STBY
3
22
1
18-21
V o
1
Sense
V
IN
4,5,6
Vo
2
Vo
1
PT6935
12-15
+
7-11
16
23
C
1
+
C
2
C
3
GND
GND
C1 = Req鈥檇 330碌F * electrolytic
C2 = Req鈥檇 330碌F * electrolytic
C3 = Optional 100碌F electrolytic
* 300碌F for Oscon廬 or low
ESR tantalum -see notes
For technical support and more information, see inside back cover or visit www.ti.com