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PT6948

更新时间: 2024-11-11 22:50:35
品牌 Logo 应用领域
德州仪器 - TI 稳压器开关
页数 文件大小 规格书
9页 192K
描述
6-A Dual Output 5-V/3.3-V Input Integrated Switching Regulator

PT6948 数据手册

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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  
Remote Sensing (Vo1 & Vo2)  
Soft-Start  
High Efficiency Dual Output  
(See Ordering Information)  
Short-Circuit Protection  
(coordinated shutdown)  
Ideal Power Source for DSPs  
5V/3.3V Input  
27-pin Space-Saving Package  
Solderable Copper Case  
6A Rated (Both Outputs)  
Internal Power-up Sequencing  
Single On/Off Control  
Independent Adjust/Trim  
Pin-Out Information  
Ordering Information  
Description  
PT 6941o = +3.3/2.5 Volts  
PT 6942o = +3.3/1.8 Volts  
PT 6943o = +3.3/1.5 Volts  
PT 6944o = +3.3/1.2 Volts  
PT 6946o = +2.5/1.8 Volts  
PT 6947o = +2.5/1.5 Volts  
PT 6948o = +2.5/1.2 Volts  
Pin Function  
The PT6940 Excalibur™ 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.  
Pin Function  
1
2
STBY* †  
Vo1 Adjust  
Vo1 Sense  
Vo1  
15  
16  
1 7  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
Vin  
Vin  
3
GND  
GND  
GND  
GND  
GND  
GND  
Vo2  
4
5
Vo1  
6
Vo1  
† -Denotes models that will also operate off  
3.3V input bus.  
7
GND  
GND  
GND  
GND  
GND  
GND  
Vin  
8
9
PT Series Suffix  
(PT1234x)  
10  
11  
12  
13  
14  
Vo2  
Case/Pin  
Configuration  
Order  
Suffix  
Package  
Vo2  
Code  
Vo2 Sense  
Vo2 Adjust  
Vertical  
Horizontal  
SMD  
N
A
C
(ENE)  
(ENF)  
(ENG)  
Vin  
(Reference the applicable package code drawing  
for the dimensions and PC layout)  
† STBY* pin: Open = Outputs enabled  
Ground = Outputs disabled  
Standard Application  
Vo1 Sense  
Vo2 Sense  
STBY*  
1
3
26  
Vo1  
4–6  
VIN  
13–16  
PT6940  
Vo2  
23–25  
7–12  
17–22  
+
+
+
CIN  
Co1  
Co2  
L
O
A
D
L
O
A
D
330µF  
330µF  
330µF  
Cin  
= Req’d 330µF * electrolytic  
Co1/Co2 = Req’d 330µF * electrolytic  
GND  
GND  
*300µF for Oscon® 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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