参数资料
| 型号： | MIC2150YML TR |
| 厂商： | Micrel Inc |
| 文件页数： | 20/27页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM 24MLF |
| 标准包装： | 1 |
| PWM 型： | 电流/电压模式 |
| 输出数： | 2 |
| 频率 - 最大： | 550kHz |
| 占空比： | 80% |
| 电源电压： | 4.5 V ~ 14.5 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： | 24-VFQFN 裸露焊盘，24-MLF? |
| 包装： | 标准包装 |
| 其它名称： | 576-3746-6 |
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Micrel, Inc.
Design and PCB Layout Guideline
Warning!!! To minimize EMI and output noise, follow
MIC2150
bypass capacitor must be used to limit the over-
voltage spike seen on the input supply with power is
suddenly applied.
these layout recommendations.
?
An additional Tantalum or Electrolytic bypass input
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.
The following guidelines should be followed to insure
proper operation of the MIC2150 and MIC2151
converters.
capacitor of 22μF or higher is required at the input
power connection.
Inductor
? Keep the inductor connection to the switch node
(SW) short.
? Do not route any digital lines underneath or close to
the inductor.
IC (Integrated Circuit)
? Place the IC and MOSFETs close to the
point-of-load (POL).
? Use fat traces to route the input and output power
lines.
?
?
Keep the switch node (SW) away from the feedback
(FB) pin.
To minimize noise, place a ground plane underneath
the inductor.
?
?
?
?
Signal and power grounds should be kept separate
and connected at only one location.
The exposed pad (EP) on the bottom of the IC must
be connected to the PGND and AGND pins of the
IC.
Place the feedback network close to the IC and keep
the high impedance feedback trace short. Then
route the V OUT trace to the output.
The V DD capacitor must be placed close to the VDD
pin and preferably connected directly to the pin and
not through a via. The capacitor must be located
right at the IC. The VDD terminal is very noise
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. Make sure stability
calculations and done at the minimum and maximum
tolerance values of ESR for the capacitor.
? 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.
sensitive and placement of the capacitor is very
critical. Connections must be made with wide trace.
Input Capacitor
? Place the V IN input capacitors on the same side of
the board and as close to the MOSFETs as
possible.
? Keep both the V IN and power GND connections
short.
? Place several vias to the ground plane close to the
V IN input capacitor ground terminal.
MOSFETs
? Low gate charge MOSFETs should be used to
maximize efficiency, especially at when operating at
lower output current.
RC Snubber
? An RC snubber from each switch node-to-ground is
recommended to reduce ringing and noise on the
output and minimize component stress.
Schottky Diode (Optional)
?
?
?
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
?
?
?
Place the Schottky diode on the same side of the
board as the MOSFETs and V IN input capacitor.
The connection from the Schottky diode’s Anode to
the input capacitors ground terminal must be as
short as possible.
The diode’s Cathode connection to the switch node
(SW) must be keep as short as possible.
?
switching regulator applications and the operating
voltage must be derated by 50%.
In “Hot-Plug” applications, a Tantalum or Electrolytic
Others
? Connect the current limiting resistor directly to the
drain of low-side MOSFET.
August 2009
20
M9999-082809-A
(408) 944-0800
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相关代理商/技术参数 |
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| MIC2151 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:2-Phase Dual Output PWM Synchronous Buck Control IC |
| MIC2151YML | 制造商:Micrel 功能描述:Micrel MIC2151YML |
| MIC2155 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:2-Phase, Single Output, PWM Synchronous Buck Control IC |
| MIC2155_0911 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:Two-Phase, Single-Output, PWM Synchronous Buck Control IC |
| MIC2155YML | 制造商:Micrel 功能描述:The Micrel MIC2155YML is a 50A Synchronous Buck Regulator. |
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