Datasheet > LM25011_15

LM25011_15

更新时间： 2024-11-15 01:06:15

品牌	Logo	应用领域
德州仪器 - TI		/
页数	文件大小	规格书
29页	1120K
描述
LM25011, LM25011-Q1, LM25011A, LM25011A-Q1 42-V 2-A Constant On-Time Switching Regulator With Adjustable Current Limit

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LM25011, LM25011-Q1, LM25011A, LM25011A-Q1

SNVS617H –APRIL 2009–REVISED NOVEMBER 2014

LM25011, LM25011-Q1, LM25011A, LM25011A-Q1 42-V 2-A Constant On-Time Switching

Regulator With Adjustable Current Limit

1 Features

3 Description

The LM25011 constant on-time step-down switching

regulator features all the functions needed to

implement a low-cost, efficient, buck bias regulator

capable of supplying up to 2 A of load current. This

high-voltage regulator contains an N-Channel Buck

switch, a startup regulator, current limit detection, and

internal ripple control. The constant on-time

regulation principle requires no loop compensation,

results in fast load transient response, and simplifies

circuit implementation. The operating frequency

remains constant with line and load. The adjustable

valley current limit detection results in a smooth

transition from constant voltage to constant current

mode when current limit is reached, without the use

of current limit foldback. The PGD output indicates

the output voltage has increased to within 5% of the

expected regulation value. Additional features

include: Low output ripple, VIN under-voltage lock-

out, adjustable soft-start timing, thermal shutdown,

gate drive pre-charge, gate drive under-voltage lock-

out, and maximum duty cycle limit.

•

LM25011-Q1 is an Automotive Grade Product that

is AEC-Q100 Grade 1 Qualified (–40°C to +125°C

Operating Junction Temperature)

•

LM25011A Allows Low-Dropout Operation at High

Switching Frequency

•

Input Operating Voltage Range: 6 V to 42 V

Absolute Maximum Input Rating: 45 V

Integrated 2-A N-Channel Buck Switch

Adjustable Current Limit Allows for Smaller

Inductor

•

Adjustable Output Voltage from 2.51 V

Minimum Ripple Voltage at V_OUT

Power Good Output

Switching Frequency Adjustable to 2 MHz

COT Topology Features:

–

Switching Frequency Remains Nearly

Constant with Load Current and Input Voltage

Variations

The LM25011A has a shorter minimum off-time than

the LM25011, which allows for higher frequency

operation at low input voltages.

–

Ultra-Fast Transient Response

No Loop Compensation Required

Stable Operation with Ceramic Output

Capacitors

Device Information⁽¹⁾

PART NUMBER

LM25011 / -Q1

PACKAGE

BODY SIZE (NOM)

–

Allows for Smaller Output Capacitor and

Current Sense Resistor

HVSSOP (10)

3.00 mm × 3.00 mm

LM25011A / -Q1

•

Adjustable Soft-Start Timing

Thermal Shutdown

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

the end of the data sheet.

Precision 2% Feedback Reference

Package: 10-Pin, HVSSOP

Typical Application

6V to 42V

Input

2 Applications

VIN

BST

C_BST

LM25011

•

Automotive Safety

Infotainment

C_IN

R_T

R_S

Telecommunication

Front Camera

V_OUT

R_PGD

V_PGD

C_OUT

Power

Good

PGD

R_FB2

CSG

C_SS

SGND

R_FB1

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...29

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与LM25011_15相关器件

型号	品牌	获取价格	描述	数据表
LM25011A	TI	获取价格	42V 2A Constant On-Time Switching Regulator With Adjustable Current Limit
LM25011AMY	TI	获取价格	42V 2A Constant On-Time Switching Regulator With Adjustable Current Limit
LM25011AMYE	TI	获取价格	42V 2A Constant On-Time Switching Regulator With Adjustable Current Limit
LM25011AMYX	TI	获取价格	42V 2A Constant On-Time Switching Regulator With Adjustable Current Limit
LM25011AQ	TI	获取价格	42V 2A Constant On-Time Switching Regulator With Adjustable Current Limit
LM25011A-Q1	TI	获取价格	LM25011, LM25011-Q1, LM25011A, LM25011A-Q1 42-V 2-A Constant On-Time Switching Regulator W
LM25011AQ1MY	TI	获取价格	42V 2A Constant On-Time Switching Regulator With Adjustable Current Limit
LM25011AQ1MY/NOPB	TI	获取价格	LM25011, LM25011-Q1, LM25011A, LM25011A-Q1 42-V 2-A Constant On-Time Switching Regulator W
LM25011AQ1MYX	TI	获取价格	42V 2A Constant On-Time Switching Regulator With Adjustable Current Limit
LM25011AQ1MYX/NOPB	TI	获取价格	LM25011, LM25011-Q1, LM25011A, LM25011A-Q1 42-V 2-A Constant On-Time Switching Regulator W

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