參數(shù)資料
型號(hào)： LM2676T-3.3
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類(lèi)： 穩(wěn)壓器
英文描述： SIMPLE SWITCHER High Efficiency 3A Step-Down Voltage Regulator
中文描述： 5.4 A SWITCHING REGULATOR, 280 kHz SWITCHING FREQ-MAX, PZFM7
封裝： TO-220, 7 PIN
文件頁(yè)數(shù)： 1/25頁(yè)
文件大?。?/td> 455K
代理商： LM2676T-3.3
LM2676
SIMPLE SWITCHER
High Efficiency 3A Step-Down
Voltage Regulator
General Description
The LM2676 series of regulators are monolithic integrated
circuits which provide all of the active functions for a step-
down (buck) switching regulator capable of driving up to 3A
loads with excellent line and load regulation characteristics.
High efficiency (
>
90%) is obtained through the use of a low
ON-resistance DMOS power switch. The series consists of
fixed output voltages of 3.3V, 5V and 12V and an adjustable
output version.
The SIMPLE SWITCHER concept provides for a complete
design using a minimum number of external components. A
high fixed frequency oscillator (260KHz) allows the use of
physically smaller sized components. A family of standard
inductors for use with the LM2676 are available from several
manufacturers to greatly simplify the design process.
The LM2676 series also has built in thermal shutdown,
current limiting and an ON/OFF control input that can power
down the regulator to a low 50μA quiescent current standby
condition. The output voltage is guaranteed to a
±
2% toler-
ance. The clock frequency is controlled to within a
±
11%
tolerance.
Features
n
Efficiency up to 94%
n
Simple and easy to design with (using off-the-shelf
external components)
n
150 m
DMOS output switch
n
3.3V, 5V and 12V fixed output and adjustable (1.2V to
37V ) versions
n
50μA standby current when switched OFF
n
±
2%maximum output tolerance over full line and load
conditions
n
Wide input voltage range: 8V to 40V
n
260 KHz fixed frequency internal oscillator
n
40 to +125C operating junction temperature range
Applications
n
Simple to design, high efficiency (
>
90%) step-down
switching regulators
n
Efficient system pre-regulator for linear voltage
regulators
n
Battery chargers
Typical Application
10091403
SIMPLE SWITCHER
is a registered trademark of National Semiconductor Corporation.
October 2003
L
2003 National Semiconductor Corporation
DS100914
www.national.com
相關(guān)PDF資料
PDF描述
LM2676S-5.0 SIMPLE SWITCHER High Efficiency 3A Step-Down Voltage Regulator
LM2676S-ADJ SIMPLE SWITCHER High Efficiency 3A Step-Down Voltage Regulator
LM2676T-5.0 Hermetically sealed high temperature limit switch with Screw termination, Plunger actuation, Double Pole Double Throw (DPDT) Circuitry, 5 A (Resistive) ampere rating at 28 Vdc, Military Part Number MS24594-1
LM2676T-ADJ SIMPLE SWITCHER High Efficiency 3A Step-Down Voltage Regulator
LM2677S-12 Pressure Transducer, Series 19 mm, Uncompensated, Pressure Range: 0 psi to 100 psi, Absolute, 1/4-18 NPT, 10 Vdc excitation
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM2676T-5 制造商:TI 制造商全稱:Texas Instruments 功能描述:LM2676 SIMPLE SWITCHER High Efficiency 3A Step-Down Voltage Regulator
LM2676T-5.0 功能描述:直流/直流開(kāi)關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開(kāi)關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT
LM2676T-5.0/NOPB 功能描述:直流/直流開(kāi)關(guān)轉(zhuǎn)換器 HIGH EFF 3A STEP- DOWN VLTG REG RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開(kāi)關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT
LM2676T50 制造商:Texas Instruments 功能描述:SWITCHING REG 3A 5.0V 2676 TO-220
LM2676T-ADJ 功能描述:直流/直流開(kāi)關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開(kāi)關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT
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