Datasheet > LM2597-3.3

LM2597-3.3

更新时间： 2024-02-21 23:31:40

品牌	Logo	应用领域
其他 - ETC		转换器稳压器
页数	文件大小	规格书
34页	898K
描述
SIMPLE SWITCHER Power Converter 150 kHz 0.5A Step-Down Voltage Regulator with Features(897.00 k)

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LM2597-3.3 技术参数

生命周期：	Transferred	包装说明：	DIE, DIE OR CHIP
Reach Compliance Code：	unknown	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.55
模拟集成电路 - 其他类型：	SWITCHING REGULATOR	控制模式：	VOLTAGE-MODE
最大输入电压：	40 V	最小输入电压：	4.5 V
标称输入电压：	12 V	JESD-30 代码：	X-XUUC-N
功能数量：	1	最大输出电流：	1.4 A
封装主体材料：	UNSPECIFIED	封装代码：	DIE
封装等效代码：	DIE OR CHIP	封装形状：	UNSPECIFIED
封装形式：	UNCASED CHIP	认证状态：	Not Qualified
子类别：	Switching Regulator or Controllers	表面贴装：	YES
切换器配置：	BUCK	最大切换频率：	173 kHz
技术：	BIPOLAR	端子形式：	NO LEAD
端子位置：	UPPER	Base Number Matches：	1

LM2597-3.3 数据手册

March 1998

LM2597/LM2597HV

SIMPLE SWITCHER^®Power Converter 150 kHz 0.5A

Step-Down Voltage Regulator, with Features

The LM2597HV is for use in applications requiring and input

voltage up to 60V.

General Description

The LM2597/LM2597HV series of regulators are monolithic

integrated circuits that provide all the active functions for a

step-down (buck) switching regulator, capable of driving a

0.5A load with excellent line and load regulation. These de-

vices are available in fixed output voltages of 3.3V, 5V, 12V,

and an adjustable output version, and are packaged in an

8-lead DIP and an 8-lead surface mount package.

Features

n 3.3V, 5V, 12V, and adjustable output versions

n Adjustable version output voltage range, 1.2V to 37V

(57V for HV version) 4% max over line and load

conditions

n Guaranteed 0.5A output current

n Available in 8-pin surface mount and DIP-8 package

n Input voltage range up to 60V

n 150 kHz fixed frequency internal oscillator

n Shutdown /Soft-start

n Out of regulation error flag

n Error output delay

n Bias Supply Pin (V_BS) for internal circuitry improves

efficiency at high input voltages

n Low power standby mode, I_Qtypically 85 µA

n High Efficiency

This series of switching regulators is similar to the LM2594

series, with additional supervisory and performance features

added.

Requiring a minimum number of external components, these

regulators are simple to use and include internal frequency

†

compensation , improved line and load specifications,

fixed-frequency oscillator, Shutdown /Soft-start, error flag

delay and error flag output.

The LM2597/LM2597HV series operates at a switching fre-

quency of 150 kHz thus allowing smaller sized filter compo-

nents than what would be needed with lower frequency

switching regulators. Because of its high efficiency, the cop-

per traces on the printed circuit board are normally the only

heat sinking needed.

n Uses readily available standard inductors

n Thermal shutdown and current limit protection

A standard series of inductors (both through hole and sur-

face mount types) are available from several different manu-

facturers optimized for use with the LM2597/LM2597HV se-

ries. This feature greatly simplifies the design of

switch-mode power supplies.

Applications

n Simple high-efficiency step-down (buck) regulator

n Efficient pre-regulator for linear regulators

n On-card switching regulators

Other features include a guaranteed 4% tolerance on out-

n Positive to Negative converter

put voltage under all conditions of input voltage and output

load conditions, and 15% on the oscillator frequency. Ex-

ternal shutdown is included, featuring typically 85 µA

standby current. Self protection features include a two stage

current limit for the output switch and an over temperature

shutdown for complete protection under fault conditions.

Typical Application (Fixed Output Voltage Versions)

DS012440-1

†

Patent Number 5,382,918.

SIMPLE SWITCHER^®and Switchers Made Simple are registered trademarks of National Semiconductor Corporation.

DS012440

www.national.com

12 3 4 5 6 7...34

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与LM2597-3.3相关器件

型号	品牌	描述	获取价格	数据表
LM2597-3.3MDA	NSC	IC 1.4 A SWITCHING REGULATOR, 173 kHz SWITCHING FREQ-MAX, UUC, DIE, Switching Regulator or	获取价格
LM2597-3.3MWA	NSC	IC 1.4 A SWITCHING REGULATOR, 173 kHz SWITCHING FREQ-MAX, UUC, WAFER, Switching Regulator	获取价格
LM2597-5.0	ETC	SIMPLE SWITCHER Power Converter 150 kHz 0.5A Step-Down Voltage Regulator with Features(897	获取价格
LM2597-5.0MWA	NSC	IC 1.4 A SWITCHING REGULATOR, 173 kHz SWITCHING FREQ-MAX, UUC, WAFER, Switching Regulator	获取价格
LM2597-ADJMWC	NSC	IC 1.4 A SWITCHING REGULATOR, 173 kHz SWITCHING FREQ-MAX, UUC, WAFER, Switching Regulator	获取价格
LM2597HV	NSC		获取价格

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