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主要品牌产品: OWEIS-TECH
OWEIS触摸芯片 OWEIS接口芯片 OWEIS电源芯片 OWEIS语音芯片 OWEIS场效应管 一.电容式触摸芯片
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IKSEMICON一级代理 ILN2003ADT IK62783DT IL2596 IL2576 ILX485 ILX3485 ILX232 ILX3232
三.功率器件/接收头/光电开关:
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中微爱芯AIP系列 AIP1668 AIP1628 AIP1629 AIP1616天微电子TM系列 TM1628 TM1668 TM1621 五.电源管理芯片:
Power Integrations LNK364PN LNK564PN 芯朋微PN8012 PN8015 AP5054 AP5056 力生美 晶源微 友达 天钰电子FR9886 FR9888 六.语音芯片:
APLUS巨华电子AP23085 AP23170 AP23341 AP23682 AP89085 AP89170 AP89341 AP89341K AP89682 七.运算放大器:
3PEAK运算放大器 聚洵运算放大器 圣邦微运算放大器 八.发光二极管:
OSRAM欧司朗发光二极管 Lite-On光宝发光二极管 Everlight亿光发光二极管 Kingbright今台发光二极管 九. CAN收发器:
NXP恩智浦CAN收发器 Microchip微芯CAN收发器 十.分销产品线:
ONSEMI安森美 TI德州仪器 ADI TOSHIBA东芝 AVAGO安华高 十一 MCU单片机
ABOV现代单片机MC96F系列 Microchip微芯单片机PIC12F PIC16F PIC18F系列 FUJITSU富仕通单片机MB95F系列 STM单片机STM32F STM32L系列 CKS中科芯单片机CKS32F系列 TI单片机MSP430系列 TMS320F系列 NXP单片机LPC系列
FEATURES
3.3V, 5.0V, 12V, 15V, and Adjustable Output Versions
Adjustable Version Output Voltage Range, 1.23 to 37V +/- 4% AG10 Maximum Over Line and Load Conditions Guaranteed 1A Output Current
1
Wide Input Voltage Range
Requires Only 4 External Components 52kHz Fixed Frequency Internal Oscillator
TTL Shutdown Capability, Low Power Standby Mode
High Efficiency
Uses Readily Available Standard Inductors Thermal Shutdown and Current Limit Protection
Moisture Sensitivity Level 3
Applications
Simple High-Efficiency Step-Down(Buck) Regulator
Efficient Pre-Regulator for Linear Regulators
On-Card Switching Regulators
Positive to Negative Converter(Buck-Boost)
Negative Step-Up Converters
Power Supply for Battery Chargers
DESCRIPTION
The LM2575 series of regulators are monolithic integrated circuits ideally suited for easy and convenient design of a step-down switching regualtor(buck converter).
All circuits of this series are capable of driving a 1A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3V, 5.0V,12V, 15V, and an adjustable output version.
ORDERING INFORMATION Device LM2575T-X.X LM2575TV-X.X LM2575R Marking LM2575T-X.X LM2575T-X.X LM2575R-X.X Package TO-220 TO-220V TO-263 These regulatiors were designed to minimize the number of externalcomponents to simplify the power supply design. Standard series of inductors optimized for use with the LM2575 are offered by several different inductor manufacturers.
Since the LM2575 converter is a switch-mode power supply, its efficiency is significantly higher in comparison with popular three-terminal limear reguators, especially with higher input voltages. In many cases, the power dissipated is so low that no heatsink is required or its size could be reduced dramatically. A standard series of inductors optimized for use with the LM2575 are available from several different manufacturers. This feature greatly simplifies the design of switch-mode power supplies. The LM2575 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℃ to 125 ℃).
External shutdown is included, featuring 80 ? (typical) standby current. The output switch includes cycle-bycycle current limiting, as well as thermal shutdown for full protection under fault conditions.
ABSOLUTE MAXIMUM RATINGS
(Absolute Maximum Ratings indicate limits beyond which damage to the device may occur) Rating Maximum Supply Voltage On/Off Pin Input Voltage Output Voltage to Ground (Steady-State) Power Dissipation TO-220 5Lead Thermal Resistance, Juntion to Ambient Thermal Resistance, Juntion to Case TO-263 5Lead Thermal Resistance, Juntion to Ambient Thermal Resistance, Juntion to Case Storage Temperature Range Minimum ESD Rating(Human Body Model : C=100 pF, R=1.5?) Lead Temperature (Soldering,10seconds) Maximum Junction Temperature Symbol Vin - - Value 45 -0.3V ≤ V ≤ +Vin - 1.0 Unit V V V PD PθJA PθJC PD PθJA PθJC Tstg - - TJ Internally Limited 65 5.0 Internally Limited 70 5.0 -60 to +150 2.0 260 150 W ℃/W ℃/W W ℃/W ℃/W ℃ kV ℃ ℃
OPERATING RATINGS(Operating Ratings indicate conditions for which the device is
intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications, see the Electrical Characteristics.) Rating Symbol Value Unit TJ Operating Junction Temperature Range -40 to +125 ℃ Supply Voltage Vin 40 V Characteristics LM2575-3.3V ([Note 1] Test Circuit Figure 2) Output Voltage (Vin = 12V, ILOAD=0.5A, TJ=25℃) Output Voltage (6.0V≤Vin≤40V, 0.5A≤ILOAD≤1A TJ=25℃ TJ= -40℃ ~ +125℃ Efficiency (Vin=12V, ILOAD=1A) Symbol Min TYP Max Unit Vout 3.234 3.3 3.366 V Vout η 3.168 3.135 - 3.3 - 75 3.432 3.465 - V % LM2575-5.0V ([Note 1] Test Circuit Figure 2) Output Voltage (Vin = 12V, ILOAD=0.5A, TJ=25℃) Output Voltage (8.0V≤Vin≤40V, 0.5A≤ILOAD≤1A TJ=25℃ TJ= -40℃ ~ +125℃ Efficiency (Vin=12V, ILOAD=1A) Vout 4.9 5.0 5.1 V Vout η 4.8 4.75 - 5.0 - 77 5.2 5.25 - V % LM2575-12V ([Note 1] Test Circuit Figure 2) Output Voltage (Vin = 25V, ILOAD=0.5A, TJ=25℃) Output Voltage (15V≤Vin≤40V, 0.5A≤ILOAD≤1A TJ=25℃ TJ= -40℃ ~ +125℃ Efficiency (Vin=12V, ILOAD=1A) Vout 11.76 12 12.24 V Vout η 11.52 11.4 - 12 - 88 12.48 12.6 - V % LM2575-ADJ ([Note 1] Test Circuit Figure 2) Feedback Voltage (Vin=12V, ILOAD=0.5A, TJ=25℃) Feedback Voltage(8.0V≤Vin≤40V, 0.5A≤ILOAD≤1A, Vout=5.0V) Vout 1.217 1.23 1.243 V Vout η 1.193 1.18 - 1.23 - 77 1.267 1.28 - V % TJ=25℃ TJ= -40℃ ~ +125℃ Efficiency (Vin=12V, ILOAD=1A, Vout=5.0V)