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LM2576HVT-15 参数 Datasheet PDF下载

LM2576HVT-15图片预览
型号: LM2576HVT-15
PDF下载: 下载PDF文件 查看货源
内容描述: 稳压器是单片集成电路,提供所有活动功能的降压型开关 [regulators are monolithic integrated circuits that provide all the active functions for a step-down switching]
分类和应用: 稳压器开关
文件页数/大小: 8 页 / 5067 K
品牌: TGS [ Tiger Electronic Co.,Ltd ]
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TIGER ELECTRONIC CO.,LTD
LM2576 Series
Description
The LM2576 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 with 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 LM2576 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 LM2576 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:
Features
Applications
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
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)
7V - 40V
(60V for HV)
UNREGULATED
DC INPUT
+V
IN
1
LM2576/
LM2576HV-
5.0
3
+
GND
C
IN
FEEDBACK
4
L1
OUTPUT
2
100
H
5 ON/OFF
D1
1N5822
+
C
OUT
1000
F
+5V
REGULATED
OUTPUT
3A
LOAD
TIGER ELECTRONICS CO.,LTD
1