- 您現在的位置：買賣IC網 > PDF目錄79906 > LM2576-5.0WUTR (MICREL INC) 7.5 A SWITCHING REGULATOR, 63 kHz SWITCHING FREQ-MAX, PSSO5 PDF資料下載
參數資料
| 型號： | LM2576-5.0WUTR |
| 廠商： | MICREL INC |
| 元件分類： | 穩壓器 |
| 英文描述： | 7.5 A SWITCHING REGULATOR, 63 kHz SWITCHING FREQ-MAX, PSSO5 |
| 封裝： | ROHS COMPLIANT, TO-263, 5 PIN |
| 文件頁數： | 1/9頁 |
| 文件大小： | 57K |
| 代理商： | LM2576-5.0WUTR |
August 2005
1
M9999-082605-B
LM2576
Micrel, Inc.
LM2576
52kHz Simple 3A Buck Regulator
General Description
The LM2576 series of monolithic integrated circuits provide
all the active functions for a step-down (buck) switching
regulator. Fixed versions are available with a 3.3V, 5V, or 12V
fixed output. Adjustable versions have an output voltage
range from 1.23V to 37V. Both versions are capable of driving
a 3A load with excellent line and load regulation.
These regulators are simple to use because they require a
minimum number of external components and include internal
frequency compensation and a fixed-frequency oscillator.
The LM2576 series offers a high efficiency replacement for
popular three-terminal adjustable linear regulators. It
substantially reduces the size of the heat sink, and in many
cases no heat sink is required.
A standard series of inductors available from several different
manufacturers are ideal for use with the LM2576 series. This
feature greatly simplifies the design of switch-mode power
supplies.
The feedback voltage is guaranteed to
±2% tolerance for
adjustable versions, and the output voltage is guaranteed to
±3% for fixed versions, within specified input voltages and
output load conditions. The oscillator frequency is guaranteed
to
±10%. External shutdown is included, featuring less than
200
A standby current. The output switch includes cycle-by-
cycle current limiting and thermal shutdown for full protection
under fault conditions.
Typical Applications
Features
3.3V, 5V, 12V, and adjustable output versions
Voltage over specified line and load conditions:
Fixed version:
±3% max. output voltage
Adjustable version:
±2% max. feedback voltage
Guaranteed 3A output current
Wide input voltage range:
4V to 40V
Wide output voltage range
1.23V to 37V
Requires only 4 external components
52kHz fixed frequency internal oscillator
Low power standby mode I
Q typically < 200A
80% efficiency (adjustable version typically > 80%)
Uses readily available standard inductors
Thermal shutdown and current limit protection
100% electrical thermal limit burn-in
Applications
Simple high-efficiency step-down (buck) regulator
Efficient pre-regulator for linear regulators
On-card switching regulators
Positive to negative converter (inverting Buck-Boost)
Isolated Flyback Converter using minimum number of
external components
Negative Boost Converter
R2
R1
7V–40V
Unregulated
DC Input
LM2575
+
CIN
100F
+VIN
1
3
Gnd
5
On/Off
2
Output
4
Feedback
L1
330H
+
D1
1N5822
COUT
330F
R2 3.09k
R1 1k
VOUT = 1.23 1 +
(
)
+5V, 1A
Regulated
Output
Note: Pin numbers are for TO-220 Package
7V–40V
Unregulated
DC Input
LM2575-5.0
+
CIN
100F
+VIN
1
3
Gnd
5
On/Off
2
Output
4
Feedback
L1
330H
+
D1
1N5822
COUT
330F
+5V, 1A
Regulated
Output
Note: Pin numbers are for TO-220 Package
Fixed Regulator in Typical Application
Adjustable Regulator in Fixed Output Application
Micrel, Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel + 1 (408) 944-0800 fax + 1 (408) 474-1000 http://www.micrel.com
相關PDF資料 |
PDF描述 |
|---|---|
| LS4301-7ERD0T | 1-OUTPUT 100 W AC-DC PWR FACTOR CORR MODULE |
| LS5660-7EPD7TB1 | 2-OUTPUT 100 W AC-DC PWR FACTOR CORR MODULE |
| LTC3615IUF#TRPBF | SWITCHING REGULATOR, PQCC24 |
| LM22672QMR-5.0 | 1.8 A SWITCHING REGULATOR, 600 kHz SWITCHING FREQ-MAX, PDSO8 |
| LW100-51 | 4-OUTPUT 100 W AC-DC REG PWR SUPPLY MODULE |
相關代理商/技術參數 |
參數描述 |
|---|---|
| LM2576ADJ | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:Easy Switcher 3.0A Step-Down Voltage Regulator 開關穩壓集成塊 |
| LM2576-ADJ | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:Easy Switcher 3.0A Step-Down Voltage Regulator |
| LM2576BM | 制造商:TGS 制造商全稱:Tiger Electronic Co.,Ltd 功能描述:3A Step-Down Voltage Regulator |
| LM2576BT | 功能描述:IC REG BUCK ADJ 3A TO220-5 RoHS:否 類別:集成電路 (IC) >> PMIC - 穩壓器 - DC DC 開關穩壓器 系列:- 標準包裝:20 系列:SIMPLE SWITCHER® 類型:降壓（降壓） 輸出類型:固定 輸出數:1 輸出電壓:12V 輸入電壓:4 V ~ 60 V PWM 型:電壓模式 頻率 - 開關:52kHz 電流 - 輸出:1A 同步整流器:無 工作溫度:-40°C ~ 125°C 安裝類型:通孔 封裝/外殼:16-DIP（0.300"，7.62mm） 包裝:管件 供應商設備封裝:16-DIP 其它名稱:*LM2575HVN-12LM2575HVN-12 |
| LM2576BU | 功能描述:IC REG BUCK ADJ 3A TO263-5 RoHS:否 類別:集成電路 (IC) >> PMIC - 穩壓器 - DC DC 開關穩壓器 系列:- 標準包裝:20 系列:SIMPLE SWITCHER® 類型:降壓（降壓） 輸出類型:固定 輸出數:1 輸出電壓:12V 輸入電壓:4 V ~ 60 V PWM 型:電壓模式 頻率 - 開關:52kHz 電流 - 輸出:1A 同步整流器:無 工作溫度:-40°C ~ 125°C 安裝類型:通孔 封裝/外殼:16-DIP（0.300"，7.62mm） 包裝:管件 供應商設備封裝:16-DIP 其它名稱:*LM2575HVN-12LM2575HVN-12 |
發布緊急采購，3分鐘左右您將得到回復。