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參數資料
| 型號： | LM2575S-3.3 |
| 元件分類： | 穩壓器 |
| 英文描述： | 3.2 A SWITCHING REGULATOR, 62 kHz SWITCHING FREQ-MAX, PSSO5 |
| 封裝： | TO-263, 5 PIN |
| 文件頁數： | 1/18頁 |
| 文件大小： | 449K |
| 代理商： | LM2575S-3.3 |
1.0 & 3.0 AMP MINICONVERTER
SWITCHING REGULATORS
LM2575
LM2576
1998 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
April 7, 1998
1
FEATURES
Pin for pin interchangeable with National’s
LM2575/LM2576 series
DC-to-DC buck or buck/boost converter requiring
only 4 support components
Fixed or adjustable voltages
Preset output voltages of 3.3, 5 and 12V
Wide output voltage range, 1.23 to 35V
82% typical efficiency @ 5V
Wide input voltage range, 4V to 40V
Inhibit/enable control pin
DESCRIPTION
The LM2575/6 series switching regulators are mono-
lithic 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.
The LM2575/6 series miniconverters include a
switching regulator and compensation network all
within the same package. Just add a choke, catch
diode and two capacitors to obtain an efficient DC-to-
DC converter. Current limit and thermal shutdown
features of the LM2575/6 series fully protect the device
against overstress conditions.
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.
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com
ABSOLUTE MAXIMUM RATINGS
Parameter
Symbol Maximum
Units
Input Voltage
V
IN
45
V
On/Off Pin Input
Voltage
-0.3
≤V≤V
IN
V
Output Voltage to
Common (Steady
State)
-1
V
Power Dissipation
P
D
Internally
Limited
W
Thermal Resistance
Junction to Case
TO-220
TO-263
θ
JC
2.0
°C/W
Thermal Resistance
Junction to Ambient
TO-220
TO-263
θ
JA
55
60
°C/W
Operating Junction
Temperature Range
T
J
-40 to 125
°C
Storage Temperature
Range
T
STG
-40 to 125
°C
Lead Temperature
(Soldering) 10 Sec
T
LEAD
260
°C
ESD Class
2
ORDERING INFORMATION
Notes:
(1) XX = Voltage Option 3.3, 5.0, 12, and ADJ (1.23V
to 35V).
(2) T-XX = Straight in-line; T-XX-V = Vertical Stag-
gered; T-XX-H = Horizontal Staggered.
(3) Add suffix ‘TR’ for tape and reel (TO-263).
DEVICE
(1)
PACKAGE
CURRENT
LM2575T-XX
TO-220
(2)
1A
LM2575S-XX
TO-263
(3)
LM2576T-XX
TO-220
(2)
3A
LM2576S-XX
TO-263
(3)
BLOCK DIAGRAM
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LM2575S-5.0 | 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 |
| LM2575S-5.0 | 制造商:Texas Instruments 功能描述:SWITCHING REG 1A 5.0V SMD 2575 |
| LM2575S-5.0.TR | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Analog IC |
| LM2575S-5.0/NOPB | 功能描述:直流/直流開關轉換器 1A STEP-DOWN VLTG REG 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 |
| LM2575S5.0NOPB | 制造商:National Semiconductor 功能描述:Conv DC-DC Single Step Down 4V to 40V 6-Pin(5+Tab) TO-263 |
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