Datasheet > LM5117_15

LM5117_15

更新时间： 2024-09-30 00:51:35

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德州仪器 - TI		/
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Wide Input Range Synchronous Buck Controller with Analog Current Monitor

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LM5117, LM5117-Q1

SNVS698F –APRIL 2011–REVISED AUGUST 2015

LM5117/Q1 Wide Input Range Synchronous Buck Controller with Analog Current Monitor

1 Features

3 Description

The LM5117 is

a synchronous buck controller

•

LM5117-Q1 is Qualified for Automotive

Applications

intended for step-down regulator applications from a

high voltage or widely varying input supply. The

control method is based upon current mode control

utilizing an emulated current ramp. Current mode

control provides inherent line feed-forward, cycle-by-

cycle current limiting and ease of loop compensation.

The use of an emulated control ramp reduces noise

sensitivity of the pulse-width modulation circuit,

allowing reliable control of very small duty cycles

necessary in high input voltage applications.

•

AEC-Q100 Qualified With the Following Results:

–

Device Temperature Grade 1: -40°C to 125°C

Ambient Operating Temperature Range

•

Emulated Peak Current Mode Control

Wide Operating Range from 5.5 V to 65 V

Robust 3.3-A Peak Gate Drives

Adaptive Dead-Time Output Driver Control

Free-Run or Synchronizable Clock up to 750 kHz

Optional Diode Emulation Mode

The operating frequency is programmable from 50

kHz to 750 kHz. The LM5117 drives external high-

side and low-side NMOS power switches with

adaptive dead-time control. A user-selectable diode

emulation mode enables discontinuous mode

operation for improved efficiency at light load

conditions. A high voltage bias regulator that allows

external bias supply further improves efficiency. The

LM5117’s unique analog telemetry feature provides

average output current information. Additional

features include thermal shutdown, frequency

synchronization, hiccup mode current limit, and

adjustable line undervoltage lockout.

Programmable Output from 0.8 V

Precision 1.5% Voltage Reference

Analog Current Monitor

Programmable Current Limit

Hiccup Mode Overcurrent Protection

Programmable Soft-Start and Tracking

Programmable Line Undervoltage Lockout

Programmable Switchover to External Bias Supply

Thermal Shutdown

Device Information⁽¹⁾

2 Applications

PART NUMBER

LM5117

LM5117-Q1

PACKAGE

HTSSOP (20) PWP 6.50 mm × 4.40 mm

WQFN (24) RTW 4.00 mm × 4.00 mm

BODY SIZE (NOM)

•

Automotive Infotainment

Industrial DC-DC Motor Drivers

Automotive USB Power

Telecom Server

(1) For all available packages, see the orderable addendum at

the end of the datasheet.

Typical Application

UVLO

VIN

DEMB

VCC

RAMP

LM5117

OUT

VCCDIS

COMP

CSG

RT RES SS AGND PGND

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

12 3 4 5 6 7...43

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与LM5117_15相关器件

型号	品牌	获取价格	描述	数据表
LM5117PMH/NOPB	TI	获取价格	5.5-65V Wide Vin, Current Mode Synchronous Buck Controller with Analog Current Monitor 20-
LM5117PMHE/NOPB	TI	获取价格	5.5-65V Wide Vin, Current Mode Synchronous Buck Controller with Analog Current Monitor 20-
LM5117PMHX/NOPB	TI	获取价格	Wide Input Range Synchronous Buck Controller with Analog Current Monitor
LM5117PSQ/NOPB	TI	获取价格	Wide Input Range Synchronous Buck Controller with Analog Current Monitor
LM5117PSQE/NOPB	TI	获取价格	Wide Input Range Synchronous Buck Controller with Analog Current Monitor
LM5117PSQX/NOPB	TI	获取价格	Wide Input Range Synchronous Buck Controller with Analog Current Monitor
LM5117-Q1	TI	获取价格	Wide Input Range Synchronous Buck Controller with Analog Current Monitor
LM5117QPMH/NOPB	TI	获取价格	Wide Input Range Synchronous Buck Controller with Analog Current Monitor
LM5117QPMHE/NOPB	TI	获取价格	Wide Input Range Synchronous Buck Controller with Analog Current Monitor
LM5117QPMHX/NOPB	TI	获取价格	Wide Input Range Synchronous Buck Controller with Analog Current Monitor

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