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MIC24051YJL TR 数据手册 - Micrel（迈瑞）
制造商:
Micrel（迈瑞）
分类:
DC/DC转换器
封装:
QFN-28
描述:
MICREL SEMICONDUCTOR MIC24051YJL TR 直流-直流开关降压(逐步递减)稳压器, 可调, 4.5V-19V输入, 800mV-5.5V输出, 6A输出, QFN-28
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MIC24051YJL TR数据手册
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若手册格式错乱，请下载阅览PDF原文件
Micrel, Inc.
MIC24051
November
2012 3
M9999-112612-A
Pin Description (Continued)
Pin Number Pin Name Pin Function
22 CS
Current Sense input. The CS pin senses current by monitoring the voltage across the low-side
MOSFET during the OFF-time. The current sensing is necessary for short circuit protection. In order
to sense the current accurately, connect the low-side MOSFET drain to SW using a Kelvin
connection. The CS pin is also the high-side MOSFET’s output driver return.
23 SGND
Signal G
round. SGND must be connected directly to the ground planes. Do not route the SGND pin to
the PGND Pad on the top layer (see PCB Layout Guidelines for details).
24 FB
Feedback input. Input to the transconductance amplifier of the control loop. The FB pin is regulated to
0.8V. A resistor divider connecting the feedback to the output is used to adjust the desired output
voltage.
25 PG
Power Good output. Open drain output. The PG pin is externally tied with a resistor to VDD. A high
output is asserted when V
OUT
> 92% of nominal.
26 EN
Enable input. A logic level control of the output. The EN pin is CMOS-compatible. Logic high = enable,
logic low = shutdown. In the off state, supply current of the device is greatly reduced (typically 5µA).
The EN pin should not be left floating.
27 VIN Power Supply Voltage input. Requires bypass capacitor to SGND.
28 VDD
5V Internal Linear Regulator output. VDD supply is the power MOSFET gate drive supply voltage and
the supply bus for the IC. VDD is created by internal LDO from VIN. When VIN < +5.5V, VDD should
be tied to PVIN pins. A 1µF ceramic capacitor from the VDD pin to SGND pins must be place next to
the IC.
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