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参数资料
| 型号： | PT5802C |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 18 A SWITCHING REGULATOR, 350 kHz SWITCHING FREQ-MAX, SMA18 |
| 封装： | SMD-18 |
| 文件页数： | 2/13页 |
| 文件大小： | 228K |
| 代理商： | PT5802C |
Application Notes
For technical support and more information, see inside back cover or visit www.ti.com
Using the Margin Up/Down Controls on the
PT5800 & PT5810 Regulator Series
The PT5800 & PT5810 series of integrated switching
regulator modules incorporate Margin Up* (pin 4) and
Margin Dn* (pin 3) control inputs. These controls allow the
output voltage set point to be momentarily adjusted 1,
either up or down, by a nominal 5%. This provides a
convenient method for dynamically testing the load
circuit’s power supply voltage over its operating margin
or range. Note that the ±5% change is also applied to any
adjustment of the output voltage, if made, using the Vo
Adjust (pin 1).
The 5% adjustment is made by driving the appropriate
margin control input directly to the ground reference at
Sense(-) (pin 8) 2. An low-leakage open-drain device, such as
a MOSFET or a p-channel JFET is recommended for this
purpose. Adjustments of less than 5% can also be accom-
modated by adding series resistors to the control inputs
(See Figure 6-1). The value of the resistor can be selected
from Table 6-1, or calculated using the following formula.
Resistor Value Calculation
To reduce the margin adjustment to something less than
5%, series padding resistors are required (See RD and
RU in Figure 6-1). For the same amount of adjustment,
the resistor value calculated for RU and RD will be the
same. The formulas is as follows.
RU/RD =
499
– 99.8
k
%
Where
% = The desired amount of margin adjust in
percent.
Notes:
1. The Margin Up* and Margin Dn* controls were not
intended to be activated simultaneously. If they are
their affects on the output voltage may not completely
cancel, resulting in a slight shift in the output voltage
set point.
2. When possible use the Sense(-) (pin 8) as the ground
reference. This will produce a more accurate adjustment
of the output voltage at the load circuit terminals. GND
(pins 9-13) can be used if the Sense(-) pin is connected
to GND near the regulator.
C
out
+
C
in
+5V
GND
MargDn
L
O
A
D
Q
2
Sense(–)
+V
OUT
GND
PT5800
18
14–17
8
29–13
5, 6, 7
V
OUT
V
IN
GND
SNS(+)
SNS(–)
INHIBIT*
Q
1
4
3
MARG
DN*
MARG
UP*
+
MargUp
0V
+V
o
R
D
R
U
0V
Figure 6-1; Margin Up/Down Application Schematic
Table 6-1; Margin Up/Down Resistor Values
PADDING RESISTOR VALUES
% Adjust
RU / RD
5
0.0k
4
24.9k
3
66.5k
2
150.0k
1
397.0k
PT5800 & PT5810 Series
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| PT5802N | 功能描述:开关变换器、稳压器与控制器 2.5V 18-A 5-V Input Adj Step-Down ISR RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| PT5803 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:18-A 5-V Input Adjustable Integrated Switching Regulator |
| PT5803A | 功能描述:REG 1.8V 18A 4.5/5.5VIN HORZ RoHS:否 类别:电源 - 板载 >> DC DC Converters 系列:PT5800 设计资源:Maxi/Mini/Micro Design Guide, Appl Manual 标准包装:1 系列:Maxi 类型:隔离 输出数:1 电压 - 输入（最小）:43V 电压 - 输入（最大）:110V Voltage - Output 1:15V Voltage - Output 2:- Voltage - Output 3:- 电流 - 输出（最大）:* 电源（瓦） - 制造商系列:400W 电压 - 隔离:* 特点:* 安装类型:通孔 封装/外壳:模块 尺寸/尺寸:4.60" L x 2.20" W x 0.54" H（116.8mm x 55.9mm x 13.7mm） 包装:散装 工作温度:-55°C ~ 100°C 效率:* 电源（瓦特）- 最大:* |
| PT5803C | 功能描述:DC/DC转换器 1.8V 18-A 5-V Input Adj Step-Down ISR 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: |
| PT5803N | 功能描述:开关变换器、稳压器与控制器 1.8V 18-A 5-V Input Adj Step-Down ISR RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
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