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| 型号： | PTN78060WAH |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 5.5 A SWITCHING REGULATOR, 660 kHz SWITCHING FREQ-MAX, DMA10 |
| 文件页数： | 5/24页 |
| 文件大小： | 1871K |
| 代理商： | PTN78060WAH |
www.ti.com
CAPACITOR RECOMMENDATIONS for the PTN78060 WIDE-OUTPUT
PTN78060W Input Capacitor
PTN78060H Input Capacitor
Output Capacitor
Ceramic Capacitors
PTN78060W, PTN78060H
SLTS229A – NOVEMBER 2004 – REVISED APRIL 2005
ADJUST POWER MODULES
PTN78060W has a minimum requirement for input capacitance of 2.2 F of ceramic capacitance. The dielectric
may have either an X5R or X7R temperature characteristic. Ceramic capacitors should be located within 0.5 inch
(1,27 cm) of the regulator's input pins. Electrolytic capacitors can be used at the input, but only in addition to the
required ceramic capacitance. The minimum ripple current rating for any nonceramic capacitance must be at
least 500 mA rms for VO ≤ 5.5 V. For VO > 5.5 V, the minimum ripple current rating is 750 mA rms. The ripple
current rating of electrolytic capacitors is a major consideration when they are used at the input. This ripple
current requirement can be reduced by placing more ceramic capacitors at the input, in addition to the minimum
required 2.2 F.
Tantalum capacitors are not recommended for use at the input bus, as none were found to meet the minimum
voltage rating of 2
× (maximum dc voltage + ac ripple). The 2× rating is standard practice for regular tantalum
capacitors to ensure reliability. Polymer-tantalum capacitors are more reliable, and are available with a maximum
rating of typically 20 V. These can be used with input voltages up to 16 V.
PTN78060H has a minimum requirement for input capacitance of 14.1 F (3
× 4.7 F) of ceramic capacitance.
The dielectric may have either an X5R or X7R temperature characteristic. Ceramic capacitors should be located
within 0.5 inch (1,27 cm) of the regulator's inpt pins. Electrolytic capacitors can be used at the input, but only in
addition to the required ceramic capacitance. The minimum ripple current rating for any nonceramic capacitance
must be at least 400 mA rms. The ripple current rating of electrolytic capacitors is a major consideration when
they are used at the input. This ripple current requirement can be reduced by placing more ceramic capacitors at
the input, in addition to the minimum required 14.1 F.
Tantalum capacitors are not recommended for use at the input bus, as none were found to meet the minimum
voltage rating of 2
× (maximum dc voltage + ac ripple). The 2× rating is standard practice for regular tantalum
capacitors to ensure reliability. Polymer-tantalum capacitors are more reliable, and are available with a maximum
rating of typically 20 V. These can be used with input voltages up to 16 V.
The minimum capacitance required to ensure stability is a 100-F capacitor. Either ceramic or electrolytic-type
capacitors can be used. The minimum ripple current rating for the nonceramic capacitance must be at least
150 mA rms. The stability of the module and voltage tolerances are compromised if the capacitor is not placed
near the output bus pins. A high-quality, computer-grade electrolytic capacitor should be adequate. A ceramic
capacitor can be also be located within 0.5 inch (1,27 cm) of the output pin.
For applications with load transients (sudden changes in load current), the regulator response improves with
additional capacitance. Additional electrolytic capacitors should be located close to the load circuit. These
capacitors provide decoupling over the frequency range, 2 kHz to 150 kHz. Aluminum electrolytic capacitors are
suitable for ambient temperatures above 0
° C. For operation below 0° C, tantalum or Os-Con type capacitors are
recommended. When using one or more nonceramic capacitors, the calculated equivalent ESR should be no
lower than 10 m
(17 m using the manufacturer's maximum ESR for a single capacitor). A list of capacitors
Above 150 kHz, the performance of aluminum electrolytic capacitors becomes less effective. To further reduce
the reflected input ripple current, or improve the output transient response, multilayer ceramic capacitors must be
added. Ceramic capacitors have low ESR, and their resonant frequency is higher than the bandwidth of the
regulator. When placed at the output, their combined ESR is not critical as long as the total value of ceramic
capacitance does not exceed 200 F.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| PTN78060WAH | 制造商:Texas Instruments 功能描述:IC SWITCHING REG 3A ADJ 8060 制造商:Texas Instruments 功能描述:IC, SWITCHING REG 3A ADJ, 8060 制造商:Texas Instruments 功能描述:IC, SWITCHING REG 3A ADJ, 8060; Primary Input Voltage:36V; No. of Outputs:1; Output Voltage:12.6V; Output Current:3A; Voltage Regulator Case Style:SIP Module; No. of Pins:7; Operating Temperature Min:-40C; Operating Temperature ;RoHS Compliant: Yes |
| PTN78060WAS | 功能描述:DC/DC转换器 3-A Wide-Input Adj Swtch Reg 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: |
| PTN78060WAST | 功能描述:DC/DC转换器 3-A Wide-Input Adj Swtch Reg 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: |
| PTN78060WAZ | 功能描述:DC/DC转换器 3-A Wide-Input Adj Swtch Reg 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: |
| PTN78060WAZT | 功能描述:DC/DC转换器 3-A Wide-Input Adj Swtch Reg 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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