参数资料
型号: PTH08T255WAD
厂商: TEXAS INSTRUMENTS INC
元件分类: 电源模块
英文描述: DC-DC REG PWR SUPPLY MODULE
封装: PLASTIC, MODULE-22
文件页数: 33/34页
文件大小: 4336K
代理商: PTH08T255WAD
APPLICATION INFORMATION
ADJUSTING THE OUTPUT VOLTAGE
SET
O
0.7
R
8.25
(k
)
V
0.7
30.1
10
÷
÷
=
-
W
÷
-
-
÷
÷
è
è
(1)
+Sense
V
O
-Sense
GND
V
O
Adj
PTH08T255W
10
17
11
16
13
4
18
12
9
8
V
O
GND GND GND
AGND
R
SET
1%
0.05 W
C
O
+
+Sense
V
O
-Sense
GND
UDG-08145
SLTS290 – NOVEMBER 2008 ........................................................................................................................................................................................... www.ti.com
The Vo Adjust control sets the output voltage of the PTH08T255W. The adjustment range of the PTH08T255W is
3.0 V to 5.25 V. The adjustment method requires the addition of a single external resistor, RSET, that must be
connected directly between pins Vo Adjust (pin 18) and AGND (pin 4). Figure 6 shows the placement of the
required resistor.
To set the output voltage, the value of the required resistor can either be calculated using the following formula,
or simply selected from the range of standard resistor values given in Table 2.
Table 2. Output Voltage Set-Point Resistor Values
VO Required (V)
RSET (k)
VO Required (V)
RSET (k)
3.0
100
4.2
6.81
3.1
63.4
4.3
5.90
3.2
45.3
4.4
4.99
3.3
34.0
4.5
4.22
3.4
27.4
4.6
3.48
3.5
22.1
4.7
2.87
3.6
18.2
4.8(3)
2.32
3.7
15.4
4.9(3)
1.82
3.8
13.0
5.0(3)
1.37
3.9
11.0
5.1(3)
0.931
4.0
9.31
5.2(3)
0.549
4.1
8.06
0.374
(1)
RSET: Use a 0.05-W resistor with a tolerance of 1% and temperature stability of 100 ppm/°C (or better). Connect the
resistor directly between pins 18 and 4, as close to the regulator as possible, using dedicated PCB traces.
(2)
Any capacitance added to the VO Adjust pin affects the stability of the regulator.
(3)
When setting the output voltage to 4.8V or greater, the Auto-Track pin must be directly connected to VI if the feature
is not used. If the Auto-Track feature is utilized, a 100k
resistor must connect the Auto-Track pin to VI.
Figure 6. VO Adjust Resistor Placement
8
Copyright 2008, Texas Instruments Incorporated
Product Folder Link(s): PTH08T255W
相关PDF资料
PDF描述
PTH08T261WAD 1-OUTPUT DC-DC REG PWR SUPPLY MODULE
PTH08T260WAST 1-OUTPUT DC-DC REG PWR SUPPLY MODULE
PTH08T261WAST 1-OUTPUT DC-DC REG PWR SUPPLY MODULE
PTH08T260WAD 1-OUTPUT DC-DC REG PWR SUPPLY MODULE
PTH08T260WAZ 1-OUTPUT DC-DC REG PWR SUPPLY MODULE
相关代理商/技术参数
参数描述
PTH08T255WAS 功能描述:DC/DC转换器 40A,8-14V In,3-5.25V Out,Non-Iso Pwr Mod RoHS:否 制造商:Murata 产品: 输出功率: 输入电压范围:3.6 V to 5.5 V 输入电压(标称): 输出端数量:1 输出电压(通道 1):3.3 V 输出电流(通道 1):600 mA 输出电压(通道 2): 输出电流(通道 2): 安装风格:SMD/SMT 封装 / 箱体尺寸:
PTH08T255WAST 功能描述:DC/DC转换器 40A,8-14V In,3-5.25V Out,Non-Iso Pwr Mod RoHS:否 制造商:Murata 产品: 输出功率: 输入电压范围:3.6 V to 5.5 V 输入电压(标称): 输出端数量:1 输出电压(通道 1):3.3 V 输出电流(通道 1):600 mA 输出电压(通道 2): 输出电流(通道 2): 安装风格:SMD/SMT 封装 / 箱体尺寸:
PTH08T255WAZ 功能描述:DC/DC转换器 40A,8-14V In,3-5.25V Out,Non-Iso Pwr Mod RoHS:否 制造商:Murata 产品: 输出功率: 输入电压范围:3.6 V to 5.5 V 输入电压(标称): 输出端数量:1 输出电压(通道 1):3.3 V 输出电流(通道 1):600 mA 输出电压(通道 2): 输出电流(通道 2): 安装风格:SMD/SMT 封装 / 箱体尺寸:
PTH08T255WAZT 功能描述:DC/DC转换器 40A,8-14V In,3-5.25V Out,Non-Iso Pwr Mod RoHS:否 制造商:Murata 产品: 输出功率: 输入电压范围:3.6 V to 5.5 V 输入电压(标称): 输出端数量:1 输出电压(通道 1):3.3 V 输出电流(通道 1):600 mA 输出电压(通道 2): 输出电流(通道 2): 安装风格:SMD/SMT 封装 / 箱体尺寸:
PTH08T260W 制造商:TI 制造商全称:Texas Instruments 功能描述:3-A, 4.5-V to 14-V INPUT, NON-ISOLATED, WIDE-OUTPUT, ADJUSTABLE POWER MODULE WITH TurboTrans