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LM5575QMHX 数据手册 - National Semiconductor（美国国家半导体）
制造商:
National Semiconductor（美国国家半导体）
封装:
HTSSOP
描述:
SIMPLE SWITCHER易电源75V ， 1.5A降压型开关稳压器 SIMPLE SWITCHER 75V, 1.5A Step-Down Switching Regulator
Pictures:
3D模型
符号图
焊盘图
引脚图
产品图
页面导航:
引脚图在P2P3Hot
典型应用电路图在P8
原理图在P1P8P10
封装尺寸在P23P25P26
标记信息在P23P24
封装信息在P23P24P25P26
技术参数、封装参数在P3P4P5P9
应用领域在P1P28
电气规格在P3P4P5P6P7
导航目录
LM5575QMHX数据手册
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LM5575
www.ti.com
SNVS471G –JANUARY 2007–REVISED APRIL 2013
PIN DESCRIPTIONS (continued)
Pin(s) Name Description Application Information
15 PRE Pre-charge assist for the bootstrap This open drain output can be connected to SW pin to aid
capacitor charging the bootstrap capacitor during very light load conditions
or in applications where the output may be pre-charged before
the LM5575 is enabled. An internal pre-charge MOSFET is
turned on for 250ns each cycle just prior to the on-time interval
of the buck switch.
16 BST Boost input for bootstrap capacitor An external capacitor is required between the BST and the SW
pins. A 0.022µF ceramic capacitor is recommended. The
capacitor is charged from Vcc via an internal diode during the
off-time of the buck switch.
NA EP Exposed Pad Exposed metal pad on the underside of the device. It is
recommended to connect this pad to the PWB ground plane, in
order to aid in heat dissipation.
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
Absolute Maximum Ratings
(1)(2)
V
IN
to GND 76V
BST to GND 90V
PRE to GND 76V
SW to GND (Steady State) -1.5V
BST to V
CC
76V
SD, V
CC
to GND 14V
BST to SW 14V
OUT to GND Limited to Vin
SYNC, SS, FB, RAMP to GND 7V
ESD Rating
(3)
Human Body Model 2kV
Storage Temperature Range -65°C to +150°C
(1) Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which
operation of the device is intended to be functional. For ensured specifications and test conditions, see the Electrical Characteristics.
(2) If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/Distributors for availability and
specifications.
(3) The human body model is a 100pF capacitor discharged through a 1.5kΩ resistor into each pin.
Operating Ratings
(1)
V
IN
6V to 75V
Operation Junction Temperature −40°C to + 125°C
(1) Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which
operation of the device is intended to be functional. For ensured specifications and test conditions, see the Electrical Characteristics.
Copyright © 2007–2013, Texas Instruments Incorporated Submit Documentation Feedback 3
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