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参数资料
| 型号： | LM78S40CNMDA |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 1.5 A SWITCHING REGULATOR, 100 kHz SWITCHING FREQ-MAX, UUC |
| 封装： | DIE |
| 文件页数： | 1/13页 |
| 文件大小： | 349K |
| 代理商： | LM78S40CNMDA |
LM78S40
Universal Switching Regulator Subsystem
General Description
The LM78S40 is a monolithic regulator subsystem consisting
of all the active building blocks necessary for switching regu-
lator systems. The device consists of a temperature com-
pensated voltage reference, a duty-cycle controllable oscilla-
tor with an active current limit circuit, an error amplifier, high
current, high voltage output switch, a power diode and an
uncommitted operational amplifier. The device can drive ex-
ternal NPN or PNP transistors when currents in excess of
1.5A or voltages in excess of 40V are required. The device
can be used for step-down, step-up or inverting switching
regulators as well as for series pass regulators. It features
wide supply voltage range, low standby power dissipation,
high efficiency and low drift. It is useful for any stand-alone,
low part count switching system and works extremely well in
battery operated systems.
Features
n
Step-up, step-down or inverting switching regulators
n
Output adjustable from 1.25V to 40V
n
Peak currents to 1.5A without external transistors
n
Operation from 2.5V to 40V input
n
Low standby current drain
n
80 dB line and load regulation
n
High gain, high current, independent op amp
n
Pulse width modulation with no double pulsing
Block and Connection Diagrams
DS010057-2
16-Lead DIP
DS010057-1
Top View
April 1998
LM78S40
Universal
Switching
Regulator
Subsystem
1998 National Semiconductor Corporation
DS010057
www.national.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LM78S40J | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| LM78S40J/883 | 制造商:National Semiconductor Corporation 功能描述:Conv DC-DC Single Step Down 2.5V to 40V 16-Pin CDIP Rail 制造商:National Semiconductor 功能描述:Conv DC-DC Single Step Down 2.5V to 40V 16-Pin CDIP Rail |
| LM78S40N | 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 |
| LM78S40N/NOPB | 功能描述:直流/直流开关转换器 Uni Switching Reg Subsystem 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 |
| LM78-SH1 | 功能描述:基本/快动开关 Foot Switch RoHS:否 制造商:Omron Electronics 触点形式:SPDT 执行器:Lever 电流额定值:5 A 电压额定值 AC:250 V 电压额定值 DC:30 V 功率额定值: 工作力:120 g IP 等级:IP 67 NEMA 额定值: 端接类型:Wire 安装:Panel |
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