XLSEMI 大陆授权代理商.

品牌：XLSEMI

型号：XL1509-3.3E1

封装：SOP8

数量：7500000

包装：2500

年份：1610+

XLSEMI 大陆授权代理商

深圳市东兴微电子（香港）有限公司

联系人：张燕玲

QQ:851574834

手机号码：13641440131

邮箱：yanlingqq851574834@qq.com

Features 蓛 Wide 4.5V to 40V Input VOLTAGE Range 蓛 3.3V,5V,12V, and adjustable versions 蓛 OUTPUT Adjustable from 1.23V to 37V 蓛 Maximum Duty Cycle 100% 蓛 MINIMUM Drop Out 1.5V 蓛 Fixed 150KHz SWITCHING Frequency 蓛 2A Constant Output Current Capability 蓛 Internal Optimize Power Transistor 蓛 High efficiency 蓛 Excellent line and load regulation 蓛

TTL shutdown capability 蓛 ON/OFF pin with hysteresis function 蓛 Built in thermal shutdown function 蓛 Built in current limit function 蓛 Built in second current limit function 蓛 Available in SOIC8 package Applications 蓛 LCD Monitor and LCD TV 蓛 Digital Photo Frame 蓛 Set-up Box 蓛 ADSL Modem 蓛 Telecom / Networking Equipment General Description The XL1509 is a 150 KHz fixed frequency PWM buck (step-

down) DC/DC converter, capable of driving a 2A load with high efficiency, low ripple and excellent line and load regulation. Requiring a minimum number of external components, the regulator is simple to use and include internal frequency compensation and a fixed-frequency oscillator. The PWM control circuit is able to adjust the duty ratio linearly from 0 to 100%. An enable function, an over current protection function is built inside. When second current limit function happens, the operation frequency will be reduced from 150KHz to 50KHz. An internal compensation block is built in to minimize external component count.

XL1509135 24 GND VINFEEDBACKOUTPUTON/OFF 67 8GNDGND GND Figure2. Pin Configuration of XL1509 (Top View) Table 1 Pin Description Pin Number Pin Name Description 1 VIN Supply Voltage Input Pin. XL1509 operates from a 4.5V to 40V DC voltage. Bypass Vin to GND with a suitably large capacitor to eliminate noise on the input.

2 OUTPUT Power Switch Output Pin (SW). Output is the switch node that supplies power to the output. 5~8 GND Ground Pin. Care must be taken in layout. This pin should be placed outside of the Schottky Diode to output capacitor ground path to prevent switching current spikes from inducing voltage noise into XL1509. 3 FEEDBACK Feedback Pin (FB). Through an external resistor divider network, Feedback senses the output voltage and regulates it. The feedback threshold voltage is 1.23V. 4 ON/OFF Enable Pin. Drive ON/OFF pin low to turn on the device, drive it high to turn it off. Floating is default low.

2A 150KHz 40V Buck DC to DC Converter XL1509

Rev 2.0 www.xlsemi.com 5 Absolute Maximum Ratings（Note1） Parameter Symbol Value Unit Input Voltage Vin -0.3 to 45 V Feedback Pin Voltage VFB -0.3 to Vin V ON/OFF Pin Voltage VON/OFF -0.3 to Vin V Output Switch Pin Voltage VOutput -0.3 to Vin V Power Dissipation PD Internally limited mW Thermal Resistance (SOIC8) (Junction to Ambient, No Heatsink, Free Air) RJA 100 C/W Operating Junction

Temperature TJ -40 to 125 C Storage Temperature TSTG -65 to 150 C Lead Temperature (Soldering, 10 sec) TLEAD 260 C ESD (HBM) 2000 V Note1: Stresses greater than those listed under Maximum Ratings may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operation is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability.

深圳市东兴微电子（香港）有限公司

联系人：张燕玲

QQ:851574834

手机号码：13641440131

电话：0755-82778553

传真：0755-83530729

邮箱：yanlingqq851574834@qq.com