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| 型号： | MIC2176-1YMM TR |
| 厂商： | Micrel Inc |
| 文件页数： | 22/31页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM 10-MSOP |
| 标准包装： | 2,500 |
| 系列： | Hyper Speed Control™ |
| PWM 型： | 混合物 |
| 输出数： | 1 |
| 频率 - 最大： | 125kHz |
| 占空比： | 96% |
| 电源电压： | 4.5 V ~ 75 V |
| 降压： | 是 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 包装： | 带卷 (TR) |
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Micrel, Inc.
PCB Layout Guidelines
Warning!!! To minimize EMI and output noise, follow
these layout recommendations.
PCB Layout is critical to achieve reliable, stable and
efficient performance. A ground plane is required to
control EMI and minimize the inductance in power,
signal and return paths.
Inductor
? Keep the inductor connection to the switch node
(SW) short.
? Do not route any digital lines underneath or close to
the inductor.
? Keep the switch node (SW) away from the feedback
(FB) pin.
MIC2176
The following guidelines should be followed to insure
proper operation of the MIC2176 converter.
?
The SW pin should be connected directly to the
drain of the low-side MOSFET to accurate sense the
IC
?
?
?
?
?
The 1μF ceramic capacitor, which is connected to
the VDD pin, must be located right at the IC. The
VDD pin is very noise sensitive and placement of the
capacitor is very critical. Use wide traces to connect
to the VDD and PGND pins.
The signal ground pin (GND) must be connected
directly to the ground planes. Do not route the GND
pin to the PGND pin on the top layer.
Place the IC close to the point of load (POL).
Use fat traces to route the input and output power
lines.
Signal and power grounds should be kept separate
and connected at only one location.
voltage across the low-side MOSFET.
? To minimize noise, place a ground plane underneath
the inductor.
Output Capacitor
? Use a wide trace to connect the output capacitor
ground terminal to the input capacitor ground
terminal.
? Phase margin will change as the output capacitor
value and ESR changes. Contact the factory if the
output capacitor is different from what is shown in
the BOM.
? The feedback trace should be separate from the
power trace and connected as close as possible to
the output capacitor. Sensing a long high-current
load trace can degrade the DC load regulation.
Input Capacitor
MOSFETs
?
?
?
?
?
?
?
Place the input capacitor next.
Place the input capacitors on the same side of the
board and as close to the MOSFETs as possible.
Place several vias to the ground plane close to the
input capacitor ground terminal.
Use either X7R or X5R dielectric input capacitors.
Do not use Y5V or Z5U type capacitors.
Do not replace the ceramic input capacitor with any
other type of capacitor. Any type of capacitor can be
placed in parallel with the input capacitor.
If a Tantalum input capacitor is placed in parallel
with the input capacitor, it must be recommended for
switching regulator applications and the operating
voltage must be derated by 50%.
In “Hot-Plug” applications, a Tantalum or Electrolytic
?
?
?
?
Low-side MOSFET gate drive trace (DL pin to
MOSFET gate pin) must be short and routed over a
ground plane. The ground plane should be the
connection between the MOSFET source and PGND.
Chose a low-side MOSFET with a high C GS /C GD ratio
and a low internal gate resistance to minimize the
effect of dv/dt inducted turn-on.
Do not put a resistor between the Low-side
MOSFET gate drive output and the gate.
Use a 4.5V V GS rated MOSFET. Its higher gate
threshold voltage is more immune to glitches than a
2.5V or 3.3V rated MOSFET. MOSFETs that are
rated for operation at less than 4.5V V GS should not
be used.
bypass capacitor must be used to limit the over-
voltage spike seen on the input supply with power is
suddenly applied.
RC Snubber
?
Place the RC snubber on the same side of the board
and as close to the SW pin as possible.
November 2010
22
M9999-111710-A
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相关代理商/技术参数 |
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|---|---|
| MIC2176-2 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:Wide Input Voltage, Synchronous Buck Controllers Featuring Adaptive On-Time Control |
| MIC2176-2YMM | 功能描述:DC/DC 开关控制器 76V Synchronous Buck Controller RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MIC2176-2YMM 5A EV | 功能描述:电源管理IC开发工具 76V Synchronous Buck Controller - Evaluation Board RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| MIC2176-2YMM TR | 功能描述:DC/DC 开关控制器 76V Synchronous Buck Controller RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MIC2176-3 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:Wide Input Voltage, Synchronous Buck Controllers Featuring Adaptive On-Time Control |
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