Datasheet > LM34922MY

LM34922MY

更新时间： 2024-09-17 12:21:39

品牌	Logo	应用领域
德州仪器 - TI		稳压器开关
页数	文件大小	规格书
17页	346K
描述
28V, 2A Constant On-Time Switching Regulator with Adjustable Current Limit

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LM34922MY 数据手册

June 1, 2012

LM34922

28V, 2A Constant On-Time Switching Regulator with

Adjustable Current Limit

General Description

Features

The LM34922 Constant On-time Step-Down Switching Reg-

ulator features all the functions needed to implement a low

cost, efficient, buck bias regulator capable of supplying up to

2A of load current. This voltage regulator contains an N-

Channel Buck switch, a startup regulator, current limit detec-

tion, and internal ripple control. The constant on-time

regulation principle requires no loop compensation, results in

fast load transient response, and simplifies circuit implemen-

tation. 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 cur-

rent 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 un-

der-voltage lock-out, adjustable soft-start timing, thermal

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

lock-out, and maximum duty cycle limit.

Input operating voltage range: 6V to 28V

■

Absolute maximum input rating: 30V

Integrated 2A N-Channel Buck Switch

Adjustable current limit allows for smaller inductor

Adjustable output voltage from 2.51V

Minimum ripple voltage at V_OUT

Power Good output

Switching frequency adjustable to 1MHz

COT topology features:

■

-Switching frequency remains nearly constant with load

current and input voltage variations

-Ultra-fast transient response

-No loop compensation required

-Stable operation with ceramic output capacitors

-Allows for smaller output capacitor and current sense

resistor

Adjustable Soft-Start timing

■

Thermal shutdown

Precision 2% feedback reference

Package

MSOP-10EP

■

Typical Application, Basic Step-Down Regulator

30140701

301407 SNVS813

www.ti.com

12 3 4 5 6 7...17

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与LM34922MY相关器件

型号	品牌	获取价格	描述	数据表
LM34922MY/NOPB	TI	获取价格	28V, 2A Constant On-Time Switching Regulator with Adjustable Current Limit
LM34922MYX	TI	获取价格	28V, 2A Constant On-Time Switching Regulator with Adjustable Current Limit
LM34922MYX/NOPB	TI	获取价格	28V, 2A Constant On-Time Switching Regulator with Adjustable Current Limit
LM34923	TI	获取价格	80V、600mA 恒定导通时间降压开关稳压器
LM34923	NSC	获取价格	EVAL evaluation board provides the design engineer with a fully
LM34923MM/NOPB	TI	获取价格	80V、600mA 恒定导通时间降压开关稳压器 \| DGS \| 10 \| -40 to 1
LM34923MMX/NOPB	TI	获取价格	80V、600mA 恒定导通时间降压开关稳压器 \| DGS \| 10 \| -40 to 1
LM34925	TI	获取价格	适用于隔离式直流/直流转换器的 7.5V 至 100V 宽输入电压、100mA 集成二次侧
LM34925MR/NOPB	TI	获取价格	适用于隔离式直流/直流转换器的 7.5V 至 100V 宽输入电压、100mA 集成二次侧
LM34925MRX/NOPB	TI	获取价格	适用于隔离式直流/直流转换器的 7.5V 至 100V 宽输入电压、100mA 集成二次侧

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