参数资料
型号: PTN78000WAZT
厂商: TEXAS INSTRUMENTS INC
元件分类: 电源模块
英文描述: 1-OUTPUT 22.5 W DC-DC REG PWR SUPPLY MODULE
封装: ROHS COMPLIANT, DIP-5
文件页数: 3/25页
文件大小: 668K
代理商: PTN78000WAZT
Inhibit
GND
RSET
0.05 W
1%
C
I
(Ceramic)
C
O
(Required)
PTN78000W
1
4
5
2
3
Adj
GND
VO
VI
2.2 F
m
100 F
m
VI
VO
Inh
www.ti.com .......................................................................................................................................... SLTS230B – NOVEMBER 2004 – REVISED OCTOBER 2007
As an example, Table 2 gives the operating input voltage range for the common output bus voltages. In addition,
the Electrical Characteristics define the available output voltage adjust range for various input voltages.
Table 2. Standard Values of RSET for Common Output Voltages
RSET
VO
Operating
PRODUCT
(Standard Value)
(Required) (V)
(Actual) (V)
VI Range (V)
(k
)
2.5
Open
2.5
7 to 25
3.3
78.7
3.306
7 to 33
PTN780x0W
5
21
4.996
7 to 36
12
0.732
12.002
14.5 to 36
12
383
12.000
15 to 36
15
14.994
18 to 36
PTN780x0H
18
4.42
18.023
21 to 36
22
0.0953
21.998
26 to 36
(1)
A 0.05-W rated resistor may be used. The tolerance should be 1%, with a temperature stability of 100 ppm/
°C (or
better). Place the resistor as close to the regulator as possible. Connect the resistor directly between pins 4 and 1
using dedicated PCB traces.
(2)
Never connect capacitors from VO Adjust to GND or VO. Any capacitance added to the VO Adjust pin affects the
stability of the regulator.
Figure 27. PTN78000W VOAdjust Resistor Placement
Copyright 2004–2007, Texas Instruments Incorporated
11
Product Folder Link(s): PTN78000W PTN78000H
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