PT6936 Datasheet, PDF (1/12 Pages) Texas Instruments – 11-A 5V/3.3V-Input Dual Output Integrated Switching Regulator

PT6935 Series
11-A 5V/3.3V-Input Dual Output
Integrated Switching Regulator
SLTS091B
Revised (9/30/2001)
Features
• Dual Outputs
(See Ordering Information)
• 5V/3.3V Input
• Outputs Adjustable
• Remote Sensing (Vo₁ & Vo₂)
• Standby Function
• Soft-Start
• Internal Sequencing
• Short Circuit Protection
• 23-pin Space-Saving Package
• Solderable Copper Case
• Ideal Power Source for DSPs
Description
The PT6935 Excalibur™ 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 = +2.5/1.8 Volts
PT6936o = +3.3/2.5 Volts
PT6937o = +3.3/1.8 Volts
PT6938o = +3.3/1.2 Volts
PT6939o = +2.5/1.2 Volts
PT Series Suffix (PT1234x)
Case/Pin
Configuration
Order Package
Suffix
Code
Vertical
Horizontal
SMD
N
(ELF)
A
(ELG)
C
(ELH)
(Reference the applicable package code drawing
for the dimensions and PC layout)
Pin-Out Information
Pin Function
1 Vo1 Sense
2 No Connect
3 STBY
4 Vin
5 Vin
6 Vin
7 GND
8 GND
9 GND
10 GND
11 GND
12 Vo1
Pin Function
13 Vo1
14 Vo1
15 Vo1
16 Vo₁ Adjust *
17 No Connect
18 Vo2
19 Vo2
20 Vo2
21 Vo2
22 Vo₂ Sense
23 Vo2 Adjust *
* Vo₁ and Vo₂ can be pin-strapped to another
voltage. See application note on output
voltage adjustment.
Standard Application
STBY
V _IN
4,5,6
C₁
GND
Vo₂ Sense
3
22
1
Vo₁ Sense
18-21
Vo₂
PT6935
12-15
Vo₁
+
7-11 16
23
+
C₃
C₂
GND
C1 = Req’d 330µF * electrolytic
C2 = Req’d 330µF * electrolytic
C3 = Optional 100µF electrolytic
* 300µF for Oscon® or low
ESR tantalum -see notes
For technical support and more information, see inside back cover or visit www.ti.com