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参数资料
| 型号： | PTH04T261WAZ |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 电源模块 |
| 英文描述： | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| 封装： | ROHS COMPLIANT, PLASTIC, DIP-10 |
| 文件页数： | 6/36页 |
| 文件大小： | 1162K |
| 代理商： | PTH04T261WAZ |
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Output Capacitor (Required)
Output Capacitor Information
TurboTrans Output Capacitance
Non-TurboTrans Output Capacitance
SLTS273E – SEPTEMBER 2006 – REVISED JULY 2009.................................................................................................................................................. www.ti.com
The PTH04T261W requires a minimum output capacitance of 300
F of ceramic type.
The PTH04T260W requires a minimum 100
F of ceramic and 150 F of non-ceramic output capacitance.
Additional non-ceramic, low-ESR capacitance is recommended for improved performance.
The required capacitance above the minimum is determined by actual transient deviation requirements. See the
TurboTrans Technology application section within this document for specific capacitance selection.
When selecting output capacitors, the main considerations are capacitor type, temperature stability, and ESR.
When using the TurboTrans feature, the capacitance X ESR product should also be considered (see the
following section).
Ceramic output capacitors added for high-frequency bypassing should be located as close as possible to the
load to be effective. Ceramic capacitor values below 10
F should not be included when calculating the total
output capacitance value.
When the operating temperature is below 0°C, the ESR of aluminum electrolytic capacitors increases. For these
applications, Os-Con, poly-aluminum, and polymer-tantalum types should be considered.
TurboTrans allows the designer to optimize the output capacitance according to the system transient design
requirement. High quality, ultra-low ESR capacitors are required to maximize TurboTrans effectiveness. When
using TurboTrans, the capacitor's capacitance (
F) × ESR (m) product determines its capacitor type; Type A,
B, or C. These three types are defined as follows:
Type A = (100
≤ capacitance × ESR ≤ 1000) (e.g. ceramic)
Type B = (1000 < capacitance × ESR
≤ 5000) (e.g. polymer-tantalum)
Type C = (5000 < capacitance × ESR
≤ 10,000) (e.g. Os-Con)
When using more than one type of output capacitor, select the capacitor type that makes up the majority of the
total output capacitance. When calculating the C × ESR product, use the maximum ESR value from the capacitor
manufacturer's data sheet.
The PTH04T261W should be used when only Type A (ceramic) capacitors are used on the output.
Working Examples:
A capacitor with a capacitance of 330
F and an ESR of 5m, has a C×ESR product of 1650Fxm (330F ×
5m
). This is a Type B capacitor.
A capacitor with a capacitance of 1000
F and an ESR of 8m, has a C×ESR product of 8000Fxm (1000F ×
8m
). This is a Type C capacitor.
See the TurboTrans Technology application section within this document for specific capacitance selection.
Table 3 includes a preferred list of capacitors by type and vendor. See the Output Bus / TurboTrans column.
If the TurboTrans feature is not used, minimum ESR and maximum capacitor limits must be followed. System
stability may be effected and increased output capacitance may be required without TurboTrans.
When using the PTH04T260W without the TurboTrans feature, observe the minimum ESR of the entire output
capacitor bank. The minimum ESR limit of the output capacitor bank is 7m
. A list of preferred low-ESR type
capacitors, are identified in Table 3.
When using the PTH04T261W without the TurboTrans feature, the maximum amount of capacitance is 3000
F
of ceramic type. Large amounts of capacitance may reduce system stability.
Using the TurboTrans feature improves system stability, improves transient response, and reduces the
amount of output capacitance required to meet system transient design requirements.
14
Copyright 2006–2009, Texas Instruments Incorporated
Product Folder Link(s): PTH04T260W PTH04T261W
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| PTH05000WAD | 功能描述:DC/DC转换器 6A 5VInput Wide-Out Adj Plug-in 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: |
| PTH05000WAH | 功能描述:DC/DC转换器 6A 5VInput Wide-Out Adj Plug-in 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: |
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