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| 型号： | MIC2166YMME |
| 厂商： | Micrel Inc |
| 文件页数： | 21/28页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR PWM HYBRID 10-MSOP |
| 特色产品： | MIC2166 Buck Controller |
| 标准包装： | 100 |
| 系列： | Hyper Speed Control™ |
| PWM 型： | 混合物 |
| 输出数： | 1 |
| 频率 - 最大： | 750kHz |
| 占空比： | 82% |
| 电源电压： | 4.5 V ~ 28 V |
| 降压： | 无 |
| 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）裸露焊盘 |
| 包装： | 管件 |
| 其它名称： | 576-3712-5 |
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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.
MIC2166
The following guidelines should be followed to insure
proper operation of the MIC2166 converter.
?
The SW pin should be connected directly to the
drain of the low-side MOSFET to accurate sense the
IC
?
?
?
?
?
?
The 10μF ceramic capacitor, which connects to the
VDD terminal, must be located next to the IC. The
VDD terminal is very noise sensitive and placement
of the capacitor is very critical. Use wide traces to
connect the VDD and PGND pins.
Place the IC and MOSFETs 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.
The exposed pad (ePad) on the bottom of the IC
must be connected to the ground through several
vias.
The feedback resistors should be placed close to the
FB pin. The top feedback resistor should connect
directly to the output node. Run this trace away from
the switch node (SW).
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.
Schottky Diode
? Place the Schottky diode on the same side of the
board as the MOSFETs and VIN input capacitor.
? The connection from the Schottky diode’s Anode to
the input capacitors ground terminal must be as
Input Capacitor
short as possible.
?
?
Place the VIN input capacitor next.
Place the VIN input capacitors on the same side of
?
The diode’s Cathode connection to the switch node
(SW) must be keep as short as possible.
the board and as close to the MOSFETs as
RC Snubber
possible.
?
Place the RC snubber on the same side of the board
?
?
Keep both the VIN and PGND connections short.
Place several vias to the ground plane close to the
and as close to the MOSFETs as possible.
MOSFETs
VIN input capacitor ground terminal.
?
Low-side MOSFET gate drive trace (DL pin to
?
?
?
?
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
bypass capacitor must be used to limit the over-
voltage spike seen on the input supply with power is
suddenly applied.
September 2010
21
?
?
?
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 LSD output and
the gate of the low-side MOSFET.
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.
M9999-092410-C
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相关代理商/技术参数 |
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|---|---|
| MIC2166YMME TR | 功能描述:DC/DC 开关控制器 DC-DC Controller with PG and Internal LDO 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 |
| MIC2168 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:1MHz PWM Synchronous Buck Control IC |
| MIC2168_05 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:1MHz PWM Synchronous Buck Control IC |
| MIC2168A | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:1MHz PWM Synchronous Buck Control IC |
| MIC2168ABMM | 功能描述:IC REG CTRLR BUCK PWM VM 10-MSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:4,000 系列:- PWM 型:电压模式 输出数:1 频率 - 最大:1.5MHz 占空比:66.7% 电源电压:4.75 V ~ 5.25 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 ~ 85°C 封装/外壳:40-VFQFN 裸露焊盘 包装:带卷 (TR) |
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