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器件3D模型￥ 6.131
LM5117PMHX/NOPB 数据手册 - TI（德州仪器）
制造商:
TI（德州仪器）
分类:
DC/DC转换器
封装:
HTSSOP-20
描述:
具有模拟电流监视器的 5.5-65V 宽输入电压、电流模式同步降压控制器 20-HTSSOP -40 to 125
Pictures:
3D模型
符号图
焊盘图
引脚图
产品图
页面导航:
引脚图在P4P5Hot
典型应用电路图在P2P11P33
原理图在P11P33
封装尺寸在P37P39P40
焊盘布局在P23
标记信息在P37P38
封装信息在P37P38P39P40
功能描述在P12
技术参数、封装参数在P5
应用领域在P43
电气规格在P5P6P7P8P9P10
导航目录
LM5117PMHX/NOPB数据手册
Page:
of 43 Go
若手册格式错乱，请下载阅览PDF原文件
LM5117, LM5117-Q1
www.ti.com
SNVS698E –APRIL 2011–REVISED MARCH 2013
Wide Input Range Synchronous Buck Controller with Analog Current Monitor
Check for Samples: LM5117, LM5117-Q1
1
FEATURES
DESCRIPTION
The LM5117 is a synchronous buck controller
2
• LM5117-Q1 is an Automotive Grade product
intended for step-down regulator applications from a
that is AEC-Q100 grade 1 qualified (-40°C to
high voltage or widely varying input supply. The
+125°C operating junction temperature)
control method is based upon current mode control
• Emulated Peak Current Mode Control
utilizing an emulated current ramp. Current mode
control provides inherent line feed-forward, cycle-by-
• Wide Operating Range from 5.5V to 65V
cycle current limiting and ease of loop compensation.
• Robust 3.3A Peak Gate Drives
The use of an emulated control ramp reduces noise
• Adaptive Dead-Time Output Driver uontrol
sensitivity of the pulse-width modulation circuit,
• Free-Run or Synchronizable Clock up to
allowing reliable control of very small duty cycles
necessary in high input voltage applications.
750kHz
• Optional Diode Emulation Mode
The operating frequency is programmable from 50
kHz to 750 kHz. The LM5117 drives external high-
• Programmable Output from 0.8V
side and low-side NMOS power switches with
• Precision 1.5% Voltage Reference
adaptive dead-time control. A user-selectable diode
• Analog Current Monitor
emulation mode enables discontinuous mode
operation for improved efficiency at light load
• Programmable Current Limit
conditions. A high voltage bias regulator that allows
• Hiccup Mode Over Current Protection
external bias supply further improves efficiency. The
• Programmable Soft-Start and Tracking
LM5117’s unique analog telemetry feature provides
• Programmable Line Under-voltage Lockout average output current information. Additional
features include thermal shutdown, frequency
• Programmable Switch-Over to External Bias
synchronization, hiccup mode current limit and
Supply
adjustable line under-voltage lockout.
• Thermal Shutdown
PACKAGES
• HTSSOP-20 (Thermally enhanced)
• WQFN-24 (4mm x 4mm)
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2011–2013, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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