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参数资料
| 型号： | LM2594-ADJMWC |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 1.4 A SWITCHING REGULATOR, 173 kHz SWITCHING FREQ-MAX, UUC |
| 封装： | WAFER |
| 文件页数： | 26/33页 |
| 文件大小： | 837K |
| 代理商： | LM2594-ADJMWC |
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National P/N LM2594 - SIMPLE SWITCHER Power Converter 150 KHz 0.5A Step-Down Voltage Regulator
LM2594HVADJ
MWC
Full
production
N/A
wafer
jar
of
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General Description
The LM2594/LM2594HV 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 devices are available in fixed output voltages of 3.3V, 5V, 12V, and an adjustable
output version, and are packaged in a 8-lead DIP and a 8-lead surface mount package.
Requiring a minimum number of external components, these regulators are simple to use and feature
internal frequency compensation, a fixed-frequency oscillator, and improved line and load regulation
specifications.
The LM2594/LM2594HV series operates at a switching frequency of 150 kHz thus allowing smaller sized filter
components than what would be needed with lower frequency switching regulators. Because of its high
efficiency, the copper traces on the printed circuit board are normally the only heat sinking needed.
A standard series of inductors (both through hole and surface mount types) are available from several
different manufacturers optimized for use with the LM2594/LM2594HV series. This feature greatly simplifies
the design of switch-mode power supplies.
Other features include a guaranteed ±4% tolerance on output voltage under all conditions of input voltage
and output load conditions, and ±15% on the oscillator frequency. External shutdown is included, featuring
typically 85 A standby current. Self protection features include a two stage frequency reducing current limit
for the output switch and an over temperature shutdown for complete protection under fault conditions.
The LM2594HV is for applications requiring an input voltage up to 60V.
Features
q
3.3V, 5V, 12V, and adjustable output versions
q
Adjustable version output voltage range, 1.2V to 37V (57V for the HV version)±4% max over line and
load conditions
q
Available in 8-pin surface mount and DIP-8 package
q
Guaranteed 0.5A output current
q
Input voltage range up to 60V
q
Requires only 4 external components
q
150 kHz fixed frequency internal oscillator
q
TTL Shutdown capability
q
Low power standby mode, IQ typically 85 A
q
High Efficiency
q
Uses readily available standard inductors
q
Thermal shutdown and current limit protection
Applications
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Simple high-efficiency step-down (buck) regulator
q
Efficient pre-regulator for linear regulators
q
On-card switching regulators
q
Positive to Negative convertor
file:///H|/imaging/BITTING/cpl/20020808_1/08062002_10/NATL/08062002_HTML/LM2594.html (4 of 5) [Aug-09-2002 2:25:55 PM]
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| LM2594APDBCKGEVB | 功能描述:电源管理IC开发工具 LM2594ADJ PDIP8 BUCK DB RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| LM2594ASCBCKGEVB | 功能描述:BOARD EVAL FOR LM2594ADJ 8-SOIC RoHS:是 类别:编程器，开发系统 >> 评估板 - DC/DC 与 AC/DC（离线）SMPS 系列:* 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:True Shutdown™ 主要目的:DC/DC，步升 输出及类型:1，非隔离 功率 - 输出:- 输出电压:- 电流 - 输出:1A 输入电压:2.5 V ~ 5.5 V 稳压器拓扑结构:升压 频率 - 开关:3MHz 板类型:完全填充 已供物品:板 已用 IC / 零件:MAX8969 |
| LM2594DADJG | 功能描述:直流/直流开关调节器 0.5A BUCK SW REG 150KHZ RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| LM2594DADJR2G | 功能描述:直流/直流开关调节器 0.5A BUCK SW REG 150KHZ RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| LM2594HVM-12 | 功能描述:直流/直流开关转换器 RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
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