参数资料
型号: MIC2174C-1YMM TR
厂商: Micrel Inc
文件页数: 3/27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: 338kHz
占空比: 87%
电源电压: 3 V ~ 40 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
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)
Micrel, Inc.
Pin Description (Continued)
MIC2174/MIC2174C
Pin Number
9
10
Pin Name
LX
BST
Pin Function
Switch Node and Current Sense input: High current output driver return. The LX pin connects directly
to the switch node. Due to the high speed switching on this pin, the LX pin should be routed away
from sensitive nodes.
LX pin also senses the current by monitoring the voltage across the low-side MOSFET during OFF
time. In order to sense the current accurately, connect the low-side MOSFET drain to LX using a
Kelvin connection.
Boost (output): Bootstrapped voltage to the high-side N-channel MOSFET driver. A Schottky diode is
connected between the IN pin and the BST pin. A boost capacitor of 0.1 μ F is connected between the
BST pin and the LX pin. Adding a small resistor in series with the boost capacitor can slow down the
turn-on time of high-side N-Channel MOSFETs.
September 2010
3
M9999-091310-C
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