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参数资料
| 型号： | LM2574N-15 |
| 厂商： | MOTOROLA INC |
| 元件分类： | 稳压器 |
| 英文描述： | 1.8 A SWITCHING REGULATOR, 63 kHz SWITCHING FREQ-MAX, PDIP8 |
| 封装： | PLASTIC, DIP-8 |
| 文件页数： | 1/24页 |
| 文件大小： | 396K |
| 代理商： | LM2574N-15 |
Device
Operating
Temperature Range
Package
LM2574
SEMICONDUCTOR
TECHNICAL DATA
EASY SWITCHER
0.5 A STEP–DOWN
VOLTAGE REGULATOR
ORDERING INFORMATION
LM2574DW–ADJ
TA = –40° to +125°C
SO–16L
N SUFFIX
PLASTIC PACKAGE
CASE 626
(DIP–8)
8
1
PIN CONNECTIONS
Order this document by LM2574/D
DEVICE TYPE/NOMINAL OUTPUT VOLTAGE
LM2574–3.3
LM2574–5
LM2574–12
LM2574–15
LM2574–ADJ
3.3 V
5.0 V
12 V
15 V
1.23 V to 37 V
XX = Voltage Option, i.e, 3.3, 5, 12, 15 V; and ADJ for
Adjustable Output.
* No internal connection, but should be soldered to
* PC board for best heat transfer.
*
(Top View)
12
Pwr Gnd
ON/OFF
*
11
10
9
5
6
7
8
LM2574N–XX
DIP–8
DW SUFFIX
PLASTIC PACKAGE
CASE 751G
(SO–16L)
16
1
*
16
*
FB
Sig Gnd
Output
*
Vin
15
14
13
1
2
3
4
*
(Top View)
8
FB
Sig Gnd
ON/OFF
Pwr Gnd
Output
*
Vin
7
6
5
1
2
3
4
Easy Switcher 0.5 A
Step-Down Voltage Regulator
The LM2574 series of regulators are monolithic integrated circuits ideally
suited for easy and convenient design of a step–down switching regulator
(buck converter). All circuits of this series are capable of driving a 0.5 A load
with excellent line and load regulation. These devices are available in fixed
output voltages of 3.3 V, 5.0 V, 12 V, 15 V, and an adjustable output version.
These regulators were designed to minimize the number of external
components to simplify the power supply design. Standard series of
inductors optimized for use with the LM2574 are offered by several different
inductor manufacturers.
Since the LM2574 converter is a switch–mode power supply, its efficiency
is significantly higher in comparison with popular three–terminal linear
regulators, especially with higher input voltages. In most cases, the power
dissipated by the LM2574 regulator is so low, that the copper traces on the
printed circuit board are normally the only heatsink needed and no additional
heatsinking is required.
The LM2574 features include a guaranteed
±4% tolerance on output
voltage within specified input voltages and output load conditions, and
±10%
on the oscillator frequency (
±2% over 0°C to +125°C). External shutdown is
included, featuring 60
A (typical) standby current. The output switch
includes cycle–by–cycle current limiting, as well as thermal shutdown for full
protection under fault conditions.
Features
3.3 V, 5.0 V, 12 V, 15 V, and Adjustable Output Versions
Adjustable Version Output Voltage Range, 1.23 to 37 V ±4% max over
Line and Load Conditions
Guaranteed 0.5 A Output Current
Wide Input Voltage Range: 4.75 to 40 V
Requires Only 4 External Components
52 kHz Fixed Frequency Internal Oscillator
TTL Shutdown Capability, Low Power Standby Mode
High Efficiency
Uses Readily Available Standard Inductors
Thermal Shutdown and Current Limit Protection
Applications
Simple and High–Efficiency Step–Down (Buck) Regulators
Efficient Pre–regulator for Linear Regulators
On–Card Switching Regulators
Positive to Negative Converters (Buck–Boost)
Negative Step–Up Converters
Power Supply for Battery Chargers
Motorola, Inc. 1999
Rev 2, 07/1999
相关PDF资料 |
PDF描述 |
|---|---|
| LM2575-05IKTTR | 4 A SWITCHING REGULATOR, 63 kHz SWITCHING FREQ-MAX, PSSO5 |
| LM2575-33IKTTR | 4 A SWITCHING REGULATOR, 63 kHz SWITCHING FREQ-MAX, PSSO5 |
| LM2575-12IKTT | 4 A SWITCHING REGULATOR, 63 kHz SWITCHING FREQ-MAX, PSSO5 |
| LM2575-15IKTT | 4 A SWITCHING REGULATOR, 63 kHz SWITCHING FREQ-MAX, PSSO5 |
| LM2575IKTTR | 4 A SWITCHING REGULATOR, 63 kHz SWITCHING FREQ-MAX, PSSO5 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LM2574N-15/NOPB | 功能描述:IC REG BUCK 15V 0.5A 8-DIP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:SIMPLE SWITCHER® 标准包装:20 系列:SIMPLE SWITCHER® 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:12V 输入电压:4 V ~ 60 V PWM 型:电压模式 频率 - 开关:52kHz 电流 - 输出:1A 同步整流器:无 工作温度:-40°C ~ 125°C 安装类型:通孔 封装/外壳:16-DIP（0.300"，7.62mm） 包装:管件 供应商设备封装:16-DIP 其它名称:*LM2575HVN-12LM2575HVN-12 |
| LM2574N-15G | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:0.5 A, Adjustable Output Voltage, Step−Down Switching Regulator |
| LM2574N-3.3 | 功能描述:直流/直流开关转换器 RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| LM2574N-3.3 NOPB | 制造商:National Semiconductor 功能描述:Conv DC-DC Single Step Down 4V to 40V 8-Pin PDIP Rail |
| LM2574N-3.3/NOPB | 功能描述:直流/直流开关转换器 RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
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