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参数资料
| 型号： | LM2574DW-ADJR2G |
| 厂商： | ON Semiconductor |
| 文件页数： | 1/26页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 0.5A 16SOICW |
| 标准包装： | 1,000 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 1.23 V ~ 37 V |
| 输入电压： | 4.75 V ~ 40 V |
| PWM 型： | 电压模式 |
| 频率 - 开关： | 52kHz |
| 电流 - 输出： | 500mA |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SOIC（0.295"，7.50mm 宽） |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 16-SOIC W |
| 其它名称： | LM2574DW-ADJR2G-ND LM2574DW-ADJR2GOSTR |
LM2574, NCV2574
0.5 A, Adjustable Output
Voltage, Step?Down
Switching 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.
http://onsemi.com
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
16
1
SO?16 WB
DW SUFFIX
CASE 751G
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.
8
1
PDIP?8
N SUFFIX
CASE 626
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 m A (typical) standby current. The
PIN CONNECTIONS
output switch includes cycle?by?cycle current limiting, as well as
thermal shutdown for full protection under fault conditions.
Features
*
*
FB
1
2
3
16
15
14
*
*
Output
ON/OFF V in
Pwr Gnd V in
? 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
? NCV Prefix for Automotive and Other Applications Requiring Site
and Control Changes
? Pb?Free Packages are Available*
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
Sig Gnd 4 13 *
5 12
Pwr Gnd 6 11 *
* 7 10 *
* 8 9 *
(Top View)
FB 1 8 *
Sig Gnd 2 7 Output
ON/OFF 3 6 *
4 5
(Top View)
* No internal connection, but should be soldered to
* PC board for best heat transfer.
ORDERING INFORMATION
See detailed ordering and shipping information in the package
DEVICE MARKING INFORMATION
See general marking information in the device marking
*For additional information on our Pb?Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting
Techniques Reference Manual, SOLDERRM/D.
? Semiconductor Components Industries, LLC, 2006
August, 2006 ? Rev. 8
1
Publication Order Number:
LM2574/D
相关PDF资料 |
PDF描述 |
|---|---|
| LM2574N-3.3G | IC REG BUCK 3.3V 0.5A 8DIP |
| LQG15HN12NJ02D | INDUCTOR 12NH 300MA 0402 |
| LM2574N-ADJG | IC REG BUCK ADJ 0.5A 8DIP |
| LM2574N-12G | IC REG BUCK 12V 0.5A 8DIP |
| LQG15HN10NJ02D | INDUCTOR 10NH 300MA 0402 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LM2574HV | 制造商:NSC 制造商全称:National Semiconductor 功能描述: |
| LM2574HVM-12 | 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 |
| LM2574HVM-12/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 |
| LM2574HVM-12/NOPB | 制造商:Texas Instruments 功能描述:DC/DC Converter IC |
| LM2574HVM-15 | 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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