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LM2576S-12/NOPB 产品描述及参数 - TI（德州仪器）
制造商:
TI（德州仪器）
分类:
稳压芯片
封装:
TO-263-5
描述:
SIMPLE SWITCHER® 降压调节器，LM257x 系列### 直流/直流开关调节器，Texas Instruments用于高达 75V 的宽电压输入设计，以及易用性和灵活性之间的平衡。
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LM2576S-12/NOPB数据手册
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Description
The MIK2576 series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching
regulator, capable of driving 3A load
w
ith excellent line and load regulation. These devices are available in fixed output voltages of 3.3V,
5V, 12V, 15V, and an adjustable output versions. Requiring a minimum number of external
components, these regulators are simple to
use and include internal frequency compensation and a fixed-frequency
oscillator. The MIK2576 series offers a high-efficiency
replacement for popular three-terminal linear regulators. It substantially reduces the size of the heat sink, and in some cases no heat
sink is required. A standard series of inductors optimized for use with the MIK2576 are available from several different manufacturers.
This feature greatly simplifies the design of switch-mode power supplies. Other features include a guaranteed ± 4% tolerance on output
voltage within specified input voltages and output load conditions, and ±10% on the oscillator frequency
.
External shutdown is included,
featuring 50µA (typical) standby current. The output switch includes cycle-by-cycle current limiting, as well as thermal shutdown for full
protection under fault conditions.
Note: The MIK2576HV is not produced yet.
Features
• 3.3V, 5V, 12V, 15V, and adjustable output versions
• Adjustable version output voltage range
• 1.23V to 37V (57V for HV version) ± 4% max over line
and load conditions
• Guaranteed 3A output current
• Wide input voltage range, 40V up to 60V for HV
version
• Requires only 4 external components
• 52 kHz fixed frequency oscillator
• TTL shutdown capability
,
low power standby mode
• High efficiency
• Uses readily available standard inductors
• Thermal shutdown and current limit protection
Applications
• Simple high-efficiency step-down (buck) regulator
• Efficient pre-regulator for linear regulators
• On-card switching regulators
• Positive to negative converter (Buck-Boost)
Typical application
Figure 1.(Fixed Output Voltage Versions)
MIK2576/
7V - 40V
(60V for HV)
UNREGULATED
DC INPUT
MIK2576HV-
5.0
+V
IN
+5V
REGULATED
OUTPUT
3A LOAD
1
+
C
IN
3
GND ON/OFF
OUTPUT
4
FEEDBACK
L1
2
100 H
+
C
5
OUT
D1
100
F
1000 F
1N5822
Version 1.0 8th Dec 2011
www.estek.com.cn 1
LM2576 SERIES
ＳＩＭＰＬＥ ＳＷＩＴＣＨＥＲ （３Ａ ＳＴＥＰ－ＤＯＷＮ ＶＯＬＴＡＧＥ ＲＥＧＵＬＡＴＯＲ）
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