Datasheet > LM25116_14

LM25116_14

更新时间： 2024-11-16 02:58:31

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Wide Range Synchronous Buck Controller

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LM25116_14 数据手册

LM25116

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SNVS509D –APRIL 2007–REVISED FEBRUARY 2013

Wide Range Synchronous Buck Controller

Check for Samples: LM25116

FEATURES

DESCRIPTION

The LM25116 is a synchronous buck controller

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. The

operating frequency is programmable from 50 kHz to

1 MHz. The LM25116 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 low quiescent

current shutdown disables the controller and

consumes less than 10 µA of total input current.

•

Emulated peak current mode

Wide operating range up to 42V

Low I_Qshutdown (< 10 µA)

Drives standard or logic level MOSFETs

Robust 3.5A peak gate drive

Free-run or synchronous operation to 1 MHz

Optional diode emulation mode

Programmable output from 1.215V to 36V

Precision 1.5% voltage reference

Programmable current limit

Programmable soft-start

Programmable line under-voltage lockout

Automatic switch to external bias supply

HTSSOP-20 exposed pad

Thermal shutdown

Additional features include

a high voltage bias

regulator, automatic switch-over to external bias for

improved efficiency, thermal shutdown, frequency

synchronization, cycle by cycle current limit and

adjustable line under-voltage lockout. The device is

available in a power enhanced HTSSOP-20 package

featuring an exposed die attach pad to aid thermal

dissipation.

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.

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...36

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与LM25116_14相关器件

型号	品牌	获取价格	描述	数据表
LM25116MH	TI	获取价格	Wide Range Synchronous Buck Controller
LM25116MH	NSC	获取价格	Wide Range Synchronous Buck Controller
LM25116MH/NOPB	TI	获取价格	Wide Range Synchronous Buck Controller
LM25116MHX	TI	获取价格	Wide Range Synchronous Buck Controller
LM25116MHX	NSC	获取价格	Wide Range Synchronous Buck Controller
LM25116MHX/NOPB	TI	获取价格	Wide Range Synchronous Buck Controller
LM25117	TI	获取价格	Wide Input Range Synchronous Buck Controller with Analog Current Monitor
LM25117PMH	TI	获取价格	Wide Input Range Synchronous Buck Controller with Analog Current Monitor
LM25117PMH/NOPB	TI	获取价格	Wide Input Range Synchronous Buck Controller with Analog Current Monitor
LM25117PMHE	TI	获取价格	Wide Input Range Synchronous Buck Controller with Analog Current Monitor

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