主页 电源管理 直流/直流开关稳压器 直流/直流控制器
主页
电源管理
直流/直流开关稳压器
直流/直流控制器

UC3573

正在供货

降压脉宽调制器降压稳压器

立即订购
数据表

可提供此产品的更新版本

open-in-new 比较替代产品
功能与比较器件相同但引脚有所不同。
LMR54406 正在供货 4V 至 36V、0.6A、80-µA Iq 同步降压 SIMPLE SWITCHER® 电源转换器 Smaller footprint, lower quiescent current, FPWM and PFM options.
LM25148 正在供货 具有超低 IQ 的 42V 同步降压直流/直流控制器 Current mode controller with internal compensation

UC3573

正在供货
数据表 立即订购

产品详情

Rating Catalog Iout (max) (A) 0.5 Vin (max) (V) 35 Vin (min) (V) 4.2 Vout (max) (V) 30 Vout (min) (V) 1.5 Features Enable Duty cycle (max) (%) 100 Iq (typ) (A) 0.009 Number of phases 1 Operating temperature range (°C) 0 to 70
Rating Catalog Iout (max) (A) 0.5 Vin (max) (V) 35 Vin (min) (V) 4.2 Vout (max) (V) 30 Vout (min) (V) 1.5 Features Enable Duty cycle (max) (%) 100 Iq (typ) (A) 0.009 Number of phases 1 Operating temperature range (°C) 0 to 70
SOIC (D) 8 29.4 mm² (4.9 mm × 6 mm)
  • Simple Single Inductor Buck PWM Stepdown Voltage Regulation
  • Drives External PMOS Switch
  • Contains UVLO Circuit
  • Includes Pulse-by-Pulse Current Limit
  • Low 50µA Sleep Mode Current
  • Simple Single Inductor Buck PWM Stepdown Voltage Regulation
  • Drives External PMOS Switch
  • Contains UVLO Circuit
  • Includes Pulse-by-Pulse Current Limit
  • Low 50µA Sleep Mode Current

The UC3573 is a Buck pulse width modulator which steps down and regulates a positive input voltage. The chip is optimized for use in a single inductor buck switching converter employing an external PMOS switch. The block diagram consists of a precision reference, an error amplifier configured for voltage mode operation, an oscillator, a PWM comparator with latching logic, and a 0.5A peak gate driver. The UC3573 includes an undervoltage lockout circuit to insure sufficient input supply voltage is present before any switching activity can occur, and a pulse-by-pulse current limit. Input current can be sensed and limited to a user determined maximum value. In addition, a sleep comparator interfaces to the UVLO circuit which turns the chip off when the input voltage is below the UVLO threshold. This reduces the supply current to only 50uA, making the UC3573 ideal for battery powered applications.

The UC3573 is a Buck pulse width modulator which steps down and regulates a positive input voltage. The chip is optimized for use in a single inductor buck switching converter employing an external PMOS switch. The block diagram consists of a precision reference, an error amplifier configured for voltage mode operation, an oscillator, a PWM comparator with latching logic, and a 0.5A peak gate driver. The UC3573 includes an undervoltage lockout circuit to insure sufficient input supply voltage is present before any switching activity can occur, and a pulse-by-pulse current limit. Input current can be sensed and limited to a user determined maximum value. In addition, a sleep comparator interfaces to the UVLO circuit which turns the chip off when the input voltage is below the UVLO threshold. This reduces the supply current to only 50uA, making the UC3573 ideal for battery powered applications.
filter 查找其他 直流/直流控制器
下载

技术文档

未找到结果。请清除搜索并重试。
查看全部 1
顶层文档 类型 标题 格式选项 下载最新的英语版本 日期
* 数据表 Buck Pulse Width Modulator Stepdown Voltage Regulator 数据表 (Rev. A) 2010-7-15

订购和质量

支持和培训