LM3488Q

更新时间： 2024-11-23 05:42:03

品牌	Logo	应用领域
美国国家半导体 - NSC		稳压器开关控制器
页数	文件大小	规格书
24页	483K
描述
High Efficiency Low-Side N-Channel Controller for Switching Regulators

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中文翻译

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LM3488Q 数据手册

March 30, 2009

LM3488/LM3488Q

High Efficiency Low-Side N-Channel Controller for

Switching Regulators

General Description

Key Specifications

The LM3488 is a versatile Low-Side N-FET high performance

controller for switching regulators. It is suitable for use in

topologies requiring low side FET, such as boost, flyback,

SEPIC, etc. Moreover, the LM3488 can be operated at ex-

tremely high switching frequency in order to reduce the overall

solution size. The switching frequency of LM3488 can be ad-

justed to any value between 100kHz and 1MHz by using a

single external resistor or by synchronizing it to an external

clock. Current mode control provides superior bandwidth and

transient response, besides cycle-by-cycle current limiting.

Output current can be programmed with a single external re-

sistor.

Wide supply voltage range of 2.97V to 40V

■

100kHz to 1MHz Adjustable and Synchronizable clock

frequency

±1.5% (over temperature) internal reference

5µA shutdown current (over temperature)

■

Features

LM3488Q is AEC-Q100 qualified and manufactured on an

Automotive Grade Flow

■

8-lead Mini-SO8 (MSOP-8) package

■

Internal push-pull driver with 1A peak current capability

The LM3488 has built in features such as thermal shutdown,

short-circuit protection and over voltage protection. Power

saving shutdown mode reduces the total supply current to

5µA and allows power supply sequencing. Internal soft-start

limits the inrush current at start-up.

Current limit and thermal shutdown

Frequency compensation optimized with a capacitor and

a resistor

Internal softstart

■

Current Mode Operation

Undervoltage Lockout with hysteresis

Applications

Distributed Power Systems

■

Notebook, PDA, Digital Camera, and other Portable

Applications

Offline Power Supplies

■

Set-Top Boxes

Typical Application Circuit

10138844

Typical SEPIC Converter

101388

www.national.com

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与LM3488Q相关器件

型号	品牌	获取价格	描述	数据表
LM3488-Q1	TI	获取价格	High Efficiency Low-Side N-Channel Controller for Switching Regulators
LM3488QMM	TI	获取价格	High Efficiency Low-Side N-Channel Controller for Switching Regulators
LM3488QMM	NSC	获取价格	High Efficiency Low-Side N-Channel Controller for Switching Regulators
LM3488QMM/NOPB	TI	获取价格	40V Wide Vin low-side N-channel controller for switching Regulators with 5µA shut
LM3488QMMX	TI	获取价格	High Efficiency Low-Side N-Channel Controller for Switching Regulators
LM3488QMMX	NSC	获取价格	High Efficiency Low-Side N-Channel Controller for Switching Regulators
LM3488QMMX/NOPB	TI	获取价格	适用于开关稳压器且具有 5µA 关断电流的 40V 宽输入电压、低侧 N 沟道控制器 \|
LM3488Q-Q1	TI	获取价格	适用于开关稳压器且具有 5µA 关断电流的 40V 宽输入电压、低侧 N 沟道控制器
LM3489	NSC	获取价格	Hysteretic PFET Buck Controller with Enable Pin
LM3489	TI	获取价格	具有使能引脚的滞环 PFET 降压控制器

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