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LM2576S-ADJT 参数 Datasheet PDF下载

LM2576S-ADJT图片预览
型号: LM2576S-ADJT
PDF下载: 下载PDF文件 查看货源
内容描述: [Switching Regulator, 7.5A, 62kHz Switching Freq-Max, PSSO5, TO-263, 5 PIN]
分类和应用: 稳压器开关
文件页数/大小: 19 页 / 441 K
品牌: SEMTECH [ SEMTECH CORPORATION ]
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POWER MANAGEMENT
Description
The LM2575/6 series switching regulators are monolithic
integrated circuits designed for use in “buck” or “buck/
boost” regulator applications requiring accurate output
voltages over combined variations of line, load and
temperature. This unique series greatly simplifies
switching power supply design. The LM2575 has a
maximum output current of 1A and the LM2576 is rated
for 3A.
1A & 3A Miniconverter
Switching Regulators
Features
u
Pin for pin replacement for National’s LM2575/6
u
series
DC-to-DC buck or buck/boost converter requiring
only 4 support components
Fixed or adjustable voltages
Preset output voltages of 3.3V, 5V and 12V
Wide output voltage range, 1.23V to 35V
82% typical efficiency @ 5V out
Wide input voltage range, 4V to 40V
Inhibit/enable control pin
Industrial temperature range
TO-220 and TO-263 packages
LM2575 & LM2576
u
u
u
u
The LM2575/6 series miniconverters include a
u
switching regulator and compensation network all within
u
the same package. Just add a choke, catch diode and
u
two capacitors to obtain an efficient DC-to-DC converter.
u
The current limit and thermal shutdown features of the
LM2575/6 series fully protect the device against
overstress conditions.
Applications
u
u
u
u
Micro controller power supplies
Medical equipment
Industrial power supplies
Instrumentation power supplies
The LM2575/6 series offers an alternative to popular 3
terminal linear regulators by providing higher efficiency
with reduced heatsink size. In many applications a heat
sink will not be required.
Typical Application Circuits
LM2575
L
1
D
1
C
IN
C
OUT
330µH
3A
68µF
330µF
LM2576
100µH
7A
120µF
1,000µF
Revision 1, January 2001
1
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