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AX3003 150KHz, 3A PWM Buck DC/DC Converter

性能描述：

      The AX3003 series are monolithic IC designed for a step-down DC/DC converter, and own the ability of driving a 3A load without additional transistor. It saves board space. The external  shutdown  function  can  be  controlled  by  logic  level  and  then  come  into  standby mode.  The  internal  compensation  makes  feedback  control  having  good  line  and  load regulation without  external  design. Regarding  protected  function,  thermal  shutdown  is  to prevent over temperature operating from damage, and current limit is against over current operating of the output switch. If current limit function occurs and VFB is down below 0.5V,the switching frequency will be reduced.  
      The AX3003 series operates at a switching  frequency of 150KHz  thus allow *aller sized  filter  components  than  what  would  be  needed  with  lower  frequency  switching regulators. The output  version  included  fixed 3.3V, 5V, 12V, and an adjustable  t*e. The chips are available in a 5-lead TO252 package.

特点：
· Output voltage: 3.3V, 5V, 12V and adjustable output version.
· Adjustable version output voltage range, 1.23V to 19.5V.
· 50KHz fixed switching frequency.
· Voltage mode non-synchronous PWM control.
· Thermal-shutdown and current-limit protection.
· ON/OFF shutdown control input.
· Short Circuit Protect (SCP).
· Operating voltage can be up to 22V.
· Output load current: 3A.
· 5-Lead TO252 Pb-Free packages.
· Low power standby mode.
· Built-in switching transistor on chip.

典型应用电路图：

引脚图：

我们还为您提供AXElite亚瑟莱特以下电源管理IC及应用方案:

▲LED照明驱动电源

＊MR16/头灯/手电筒/汽车照明/红外灯板/台灯：AX2001,AX2002,AX2003,AX2005,AX2006,AX2020,AX2021

＊灯条/灯串：LED1113,AX2004

＊10寸以下屏背光驱动：AX2012

▲车载设备

＊车充：

5V/1A：AX3007,AX3010,AX3011,AX358,AX34063

5V/1.5A：AX3015/6

5V/2.1A：AX3111,AX3112,AX3117

5V/3.1A,5V/4.2A：AX3304

＊车载DVD/GPS：

AX3005,AX3101,AX3102,AX3103,AX3104,AX3105,AX3106,AX3107,AX3003,AX3115,AX3301,AX5110,AX5201,AX5204,AX1007,AX66xx,AX6901

▲数码消费产品

＊安*设备：AX3005,AX3001,AX3022,AX3023,AX3101,AX6901

＊DVB机顶盒：AX3001～AX3004,AX3101～AX3106,AX3512～AX3519,AX3113,AX3301,AX1084,AX1007,AX358

＊Protable DVD：AX3101,AX3482,AX3484，AX5201,AX5204,AX5510

＊*/EPC／MID：AX3102～AX3107,AX3113,AX3114,AX3120～AX3122,AX3512～AX3519,AX5201,AX5204,AX5301,AX5110,AX6901,AX1007,AX1084,AX66xx,AX993,AX995

＊LCD-TV：AX3102～AX3107,AX3113,AX3114,AX3120～AX3122,AX5201,AX5204,AX5301,AX358,AX1007,AX1084,AX66xx,AX6901

＊移动硬盘盒/底座：AX3101,AX3108,AX3301,AX3512,AX3513,AX1007(Vin与Vout两端的电容可以用到*0.1uF的MLCC)

＊SSD固态硬盘：AX351x系列（AX3512/AX3513同步降压系列产品将*外置的开关元件都整合到DC-DC的IC里，内含各一个P、NMOS，包含省电模式功能，可提供1A-4A的连续输出电流，工作频率可*到1.5Mhz，转换效率可达90%）

＊移动电源/应急充：

5V/0.6A：AX5511

5V/1A：AX5510,AX5201

5V/2A：AX5302

▲网络设备

＊路由器：AX3022,AX3001,AX3101～AX3107

＊Modem/LAN/ADSL/WLAN AP：AX3022,AX3001,AX3101～AX3107

＊无线网卡：AX3512,AX3513,AX3514