參數(shù)資料
型號(hào)： PT6921
廠商： Texas Instruments, Inc.
英文描述： 3.3/2.5Vout 25W 5V-Input Adjustable Dual Output ISR
中文描述： 3.3/2.5V 輸出 25W 5V 輸入的可調(diào)節(jié)雙路輸出 ISR
文件頁(yè)數(shù)： 1/5頁(yè)
文件大小： 195K
代理商： PT6921
For assistance or to order, call
(800) 531-5782
P T 6 9 2 0
Power Trends, Inc.
27715 Diehl Road, Warrenville, IL 60555
(800) 531-5782
Fax: (630) 393-6902
http://www.powertrends.com
S e r i e s
Standard Application
5V TO 3.3V/2.5V 25 WATT DUAL OUTPUT
INTEGRATED SWITCHING REGULATOR
Ordering Information
PT6921
J
= +3.3 Volts
+2.5/+1.8 Volts
PT6922
J
= +3.3 Volts
+1.5 Volts
C1 = Req’d 560μF electrolytic
C2 = Req’d 330μF electrolytic
C3 = Optional 100μF electrolytic
Features
Dual Outputs:
+3.3V/6A
+2.5V/2.2A or +1.8V/1.5A
Adjustable Output Voltage
Remote Sense (both outputs)
Standby Function
Over-Temperature Protection
Soft-Start
Internal Sequencing
23-pin SIPPackage
Pin Function
1
V
1
Remote Sense
2
Do Not Connect
3
STBY
4
V
in
5
V
in
6
V
in
7
GND
8
GND
9
GND
10
GND
11
GND
12
V
1out
Pin
13
14
15
16
17
18
19
20
21
22
23
Function
V
1out
V
1out
V
1out
V
1
Adjust
Do Not Connect
V
2out
V
2out
V
2out
V
2out
V
2
Remote Sense
V
2
Adjust
*
Pin-Out Information
The PT6920 is a new series of 25W
dual output ISRs designed to power the
latest generation DSP chips. Both out-
put voltages are independently adjustable
with external resistors. In addition, the
second output voltage of the PT6921 can
be selected for 2.5V or 1.8V to accom-
modate the next generation of DSP
chips. The internal power sequencing of
both outputs meet the latest require-
ments of TI’s ‘C6000 series DSPs.
(For dimensions and PC board layout,
see Package Styles 1100 and 1110.)
PT6920
C2
+
GND
V1
OUT
V
IN
GND
4,5,6
7-11
12-15
18-21
16
C1
22
C3
+
23
1
V2
OUT
R1
R2
R3
R4
V2
Sense
V1
Sense
3
STBY
PT Series Suffix
(PT1234
X
)
Case/Pin
Configuration
Vertical Through-Hole
Horizontal Through-Hole
Horizontal Surface Mount
N
A
C
Preliminary Specifications
Characteristics
(T
a
= 25°C unless noted)
Output Current
PT6920 SERIES
Min
0.1
0
0
0
0.1
0
0
0
4.5
Symbols
I
o
Conditions
T
a
=
+60°C, 200 LFM, pkg N V
1
= 3.3V
Typ
—
—
—
—
—
—
—
—
—
Max
5.5
2.2
1.75
1.2
6.0
2.2
1.75
1.2
5.5
Units
A
A
A
A
A
A
A
A
V
V
2
= 2.5V
V
2
= 1.8V
V
2
= 1.2V
T
a
=
+25°C, natural convection V
1
= 3.3V
V
2
= 2.5V
V
2
= 1.8V
V
2
= 1.2V
Input Voltage Range
Output Voltage Tolerance
V
in
V
o
0.1A
≤
I
o
≤
I
max
V
= +5V, I
= I
max,
both outputs
0°C
≤
T
a
≤
+65°C
4.5V
≤
V
in
≤
5.5V, I
o
= I
max
V
o
-0.1
—
V
o
+0.1
V
Line Regulation
Reg
line
V
1
= 3.3V
V
2
= 2.5V
V
1
= 3.3V
V
2
= 2.5V
V
1
= 3.3V
V
2
= 2.5V
—
—
—
—
—
—
—
—
—
—
±7
±7
±17
±4
50
25
25
60
60
75
±17
±13
±33
±10
—
—
—
—
—
—
mV
mV
mV
mV
mV
mV
μSec
mV
mV
%
Load Regulation
Reg
load
V
in
= +5V, 0.1
≤
I
o
≤
I
max
V
o
Ripple/Noise
V
n
V
in
= +5V, I
o
= I
max
Transient Response
with C
2
= 330μF
t
tr
V
os
I
o
step between 0.5xI
max
and I
max
V
o
over/undershoot
V
1
= 3.3V
V
2
= 2.5V
Efficiency
Switching Frequency
η
o
V
in
= +5V, I
o
= 4A total
4.5V
≤
V
in
≤
5.5V
0.1A
≤
I
o
≤
I
max
—
475
600
725
kHz
Absolute Maximum
Operating Temperature Range
Recommended Operating
Temperature Range
Storage Temperature
Weight
T
a
0
—
+85
°C
T
a
Forced airflow = 200 LFM
Over V
in and
I
o
Ranges
—
Vertical/Horizontal
0
—
+65
°C
T
s
—
-40
—
—
29
+125
—
°C
grams
Note:
The PT6920 series requires a 560μF electrolytic capacitor on the input and a 330μF electrolytic capacitor on the output for proper operation in all applications.
* This product is the subject of one or more patents. Other patents pending.
Note: for PT6921 only:
with pin 23 open, V2out=2.5V
with pin 23 shorted to pin 22, V2out=1.8V
Patent Pending*
Revised 3/9/99
Application Notes
Mechanical Outline
Product Selector Guide
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PT6921A 功能描述:DC/DC轉(zhuǎn)換器 3.3/2.5Vout 25W 5Vin Adj Dual Output ISR RoHS:否 制造商:Murata 產(chǎn)品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標(biāo)稱）: 輸出端數(shù)量:1 輸出電壓（通道 1）:3.3 V 輸出電流（通道 1）:600 mA 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體尺寸:
PT6921C 功能描述:DC/DC轉(zhuǎn)換器 3.3/2.5Vout 25W 5Vin Adj Dual Output ISR RoHS:否 制造商:Murata 產(chǎn)品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標(biāo)稱）: 輸出端數(shù)量:1 輸出電壓（通道 1）:3.3 V 輸出電流（通道 1）:600 mA 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體尺寸:
PT6921N 功能描述:DC/DC轉(zhuǎn)換器 3.3/2.5Vout 25W 5Vin Adj Dual Output ISR RoHS:否 制造商:Murata 產(chǎn)品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標(biāo)稱）: 輸出端數(shù)量:1 輸出電壓（通道 1）:3.3 V 輸出電流（通道 1）:600 mA 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體尺寸:
PT6922 制造商:TI 制造商全稱:Texas Instruments 功能描述:5V TO 3.3V/2.5V 25 WATT DUAL OUTPUT INTEGRATED SWITCHING REGULATOR
PT6922A 功能描述:開(kāi)關(guān)變換器、穩(wěn)壓器與控制器 3.3/1.5Vout 25W 5Vin Adj Dual Output ISR RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開(kāi)關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel
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