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| 型号： | LMZ10505EXTTZX/NOPB |
| 厂商： | National Semiconductor |
| 文件页数： | 9/31页 |
| 文件大小： | 0K |
| 描述： | IC BUCK SYNC ADJ 5A TO-PMOD-7 |
| 产品培训模块： | SIMPLE SWITCHER Power Modules |
| 视频文件： | Power Design Invitational - Another Geek Moment |
| 标准包装： | 500 |
| 系列： | SIMPLE SWITCHER® |
| 类型： | 非隔离（POL） |
| 输出数： | 1 |
| 电压 - 输入（最小）： | 2.95V |
| 电压 - 输入（最大）： | 5.5V |
| Voltage - Output 1： | 0.8 ~ 5 V |
| 电流 - 输出（最大）： | 5A |
| 电源（瓦） - 制造商系列： | 25W |
| 特点： | 带有 UVLO |
| 安装类型： | 表面贴装 |
| 封装/外壳： | TO-PMOD-7，电源模块 |
| 尺寸/尺寸： | 0.40" L x 0.54" W x 0.18" H（10.2mm x 13.8mm x 4.6mm） |
| 包装： | 带卷 (TR) |
| 工作温度： | -55°C ~ 125°C |
| 效率： | 96% |
| 电源（瓦特）- 最大： | 25W |
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LMZ10505EXT
www.ti.com
SNVS669G – JUNE 2010 – REVISED OCTOBER 2013
BLOCK DIAGRAM
Design Guideline And Operating Description
Design Steps
LMZ10505EXT is fully supported by Webench? and offers the following: component selection, performance,
electrical, and thermal simulations as well as the Build-It board, for a reduced design time. On the other hand, all
external components can be calculated by following the design procedure below.
1. Determine the input voltage and output voltage. Also, make note of the ripple voltage and voltage transient
requirements.
2. Determine the necessary input and output capacitance.
3. Calculate the feedback resistor divider.
4. Select the optimized compensation component values.
5. Estimate the power dissipation and board thermal requirements.
6. Follow the PCB design guideline.
7. Learn about the LMZ10505EXT features such as enable, input UVLO, soft-start, tracking, pre-biased startup,
current limit, and thermal shutdown.
Design Example
For this example the following application parameters exist.
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V IN = 5V
V OUT = 2.5V
I OUT = 5A
Δ V OUT = 20 mV pk-pk
Δ V o_tran = ±20 mV pk-pk
Input Capacitor Selection
A 22 μF or 47 μF high quality dielectric (X5R, X7R) ceramic capacitor rated at twice the maximum input voltage
is typically sufficient. The input capacitor must be placed as close as possible to the VIN pin and GND exposed
pad to substantially eliminate the parasitic effects of any stray inductance or resistance on the PC board and
supply lines.
Neglecting capacitor equivalent series resistance (ESR), the resultant input capacitor AC ripple voltage is a
triangular waveform. The minimum input capacitance for a given peak-to-peak value ( Δ V IN ) of V IN is specified as
follows:
C in &
I OUT x D x (1 - D)
f SW x V IN
(1)
Copyright ? 2010–2013, Texas Instruments Incorporated
Product Folder Links: LMZ10505EXT
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LMZ10505TZ-ADJ | 制造商:NSC 制造商全称:National Semiconductor 功能描述:5A SIMPLE SWITCHER? Power Module with 5.5V Maximum Input Voltage |
| LMZ10505TZ-ADJ/NOPB | 功能描述:直流/直流开关转换器 5V,5A PWR MODULE RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| LMZ10505TZADJNOPB | 制造商:Texas Instruments 功能描述:Module DC-DC 1-OUT 0.8V to 5V 5A 7-Pin TO-PMOD EP |
| LMZ10505TZE-ADJ | 制造商:NSC 制造商全称:National Semiconductor 功能描述:5A SIMPLE SWITCHER? Power Module with 5.5V Maximum Input Voltage |
| LMZ10505TZE-ADJ/NOPB | 功能描述:直流/直流开关转换器 RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
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