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參數資料
| 型號： | LM22676QTJ-5.0 |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩壓器 |
| 英文描述： | 5.5 A SWITCHING REGULATOR, 600 kHz SWITCHING FREQ-MAX, PSSO7 |
| 封裝： | PLASTIC, TO-263, 7 PIN |
| 文件頁數： | 1/18頁 |
| 文件大小： | 645K |
| 代理商： | LM22676QTJ-5.0 |
LM22676/LM22676Q
December 10, 2010
3A SIMPLE SWITCHER, Step-Down Voltage Regulator
with Precision Enable
General Description
The LM22676 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 N-channel MOSFET. The series consists of a
fixed 5V output and an adjustable version.
The SIMPLE SWITCHER concept provides for an easy to
use complete design using a minimum number of external
components and National’s WEBENCH design tool.
National’s WEBENCH tool includes features such as exter-
nal component calculation, electrical simulation, thermal sim-
ulation, and Build-It boards for easy design-in. The switching
clock frequency is provided by an internal fixed frequency os-
cillator which operates at 500 kHz. The LM22676 series also
has built in thermal shutdown, current limiting and an enable
control input that can power down the regulator to a low 25
A quiescent current standby condition.
Features
■ Wide input voltage range: 4.5V to 42V
■ Internally compensated voltage mode control
■ Stable with low ESR ceramic capacitors
■ 120 m N-channel MOSFET TO-263 THIN package
■ 100 m N-channel MOSFET PSOP-8 package
■ Output voltage options:
-ADJ (outputs as low as 1.285V)
-5.0 (output fixed to 5V)
■ ±1.5% feedback reference accuracy
■ Switching frequency of 500 kHz
■ -40°C to 125°C operating junction temperature range
■ Precision enable pin
■ Integrated boot diode
■ Integrated soft-start
■ Fully WEBENCH enabled
■ Step-down and inverting buck-boost applications
■ LM22676Q is an Automotive Grade product that is AEC-
Q100 grade 1 qualified (-40°C to +125°C operating
junction temperature)
Package
■ PSOP-8 (Exposed Pad)
■ TO-263 THIN (Exposed Pad)
Applications
■ Industrial Control
■ Telecom and Datacom Systems
■ Embedded Systems
■ Automotive Telematics and Body Electronics
■ Conversions from Standard 24V, 12V and 5V Input Rails
Simplified Application Schematic
30076501
2010 National Semiconductor Corporation
300765
www.national.com
LM22676/LM22676Q
3A
SIMPLE
SWITCHER,
Step-Down
Voltage
Regulator
with
Precision
Enable
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LM22676QTJ-ADJ/NOPB | 功能描述:直流/直流開關轉換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
| LM22676QTJE-5.0/NOPB | 功能描述:直流/直流開關轉換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
| LM22676QTJE-ADJ/NOPB | 功能描述:直流/直流開關轉換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
| LM22676TJ-5.0 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:3A SIMPLE SWITCHER Step-Down Voltage Regulator with Precision Enable |
| LM22676TJ-5.0/NOPB | 功能描述:直流/直流開關轉換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
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