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PT6941 Datasheet

  • PT6941

  • 6-A Dual Output 5-V/3.3-V Input Integrated Switching Regulat...

  • 192.45KB

  • 9頁

  • TI

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PT6940 Series
6-A Dual Output 5-V/3.3-V Input
Integrated Switching Regulator
SLTS155B
Revised (4/8/2002)
Features
鈥?/div>
High Efficiency Dual Output
(See Ordering Information)
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Ideal Power Source for DSPs
5V/3.3V Input
6A Rated (Both Outputs)
Internal Power-up Sequencing
Single On/Off Control
Independent Adjust/Trim
鈥?/div>
Remote Sensing (Vo
1
& Vo
2
)
鈥?/div>
Soft-Start
鈥?/div>
Short-Circuit Protection
(coordinated shutdown)
鈥?/div>
27-pin Space-Saving Package
鈥?/div>
Solderable Copper Case
Description
The PT6940 Excalibur鈩?power modules
are a series of high-efficiency dual-output
regulators, housed in a solderable space-
saving package. The dual output is ideal
for DSP applications that require a second
voltage source for a processor core.
Both outputs from the PT6940 regulator
modules are rated to deliver a full 6A load
current simultaneously, and are internally
sequenced to comply with the power-up
requirements of popular DSP ICs.
Each output can be independently
adjusted with a single external resistor, and
incorporates an output sense to compensate
for voltage drop between the regulator and
load. A short-circuit load fault at either
output will result in the coordinated
shutdown of both voltages.
Ordering Information
PT6941o
= +3.3/2.5 Volts
PT6942o
= +3.3/1.8 Volts
PT6943o
= +3.3/1.5 Volts
PT6944o
= +3.3/1.2 Volts
鈥?PT6946o
= +2.5/1.8 Volts
鈥?PT6947o
= +2.5/1.5 Volts
鈥?PT6948o
= +2.5/1.2 Volts
鈥?-Denotes models that will also operate off
3.3V input bus.
Pin-Out Information
Pin Function
1
2
3
4
5
6
7
8
9
10
11
12
13
14
STBY* 鈥?/div>
Vo
1
Adjust
Vo
1
Sense
Vo
1
Vo
1
Vo
1
GND
GND
GND
GND
GND
GND
V
in
V
in
Pin
15
16
17
18
19
20
21
22
23
24
25
26
27
Function
V
in
V
in
GND
GND
GND
GND
GND
GND
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
(ENE)
(ENF)
(ENG)
N
A
C
(Reference the applicable package code drawing
for the dimensions and PC layout)
鈥?STBY* pin: Open = Outputs enabled
Ground = Outputs disabled
Standard Application
Vo
1
Sense
STBY*
1
3
26
4鈥?
Vo
2
Sense
Vo
1
Vo
2
V
IN
13鈥?6
PT6940
23鈥?5
7鈥?2
17鈥?2
C
IN
330碌F
+
Co
1
330碌F
+
Co
2
330碌F
+
L
O
A
D
L
O
A
D
C
in
= Req鈥檇 330碌F * electrolytic
GND
GND
Co
1
/Co
2
= Req鈥檇 330碌F * electrolytic
*300碌F for Oscon廬 or low ESR tantalum
(see application notes)
For technical support and more information, see inside back cover or visit www.ti.com

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