UC2573

更新时间： 2024-11-06 12:47:15

品牌	Logo	应用领域
德州仪器 - TI		稳压器
页数	文件大小	规格书
5页	138K
描述
Buck Pulse Width Modulator Stepdown Voltage Regulator

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UC2573 数据手册

UC1573

UC2573

UC3573

Buck Pulse Width Modulator Stepdown Voltage Regulator

FEATURES

DESCRIPTION

The UC3573 is a Buck pulse width modulator which steps down and regu-

lates a positive input voltage. The chip is optimized for use in a single in-

ductor buck switching converter employing an external PMOS switch. The

block diagram consists of a precision reference, an error amplifier config-

ured 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 pres-

ent before any switching activity can occur, and a pulse-by-pulse current

limit. Input current can be sensed and limited to a user determined maxi-

mum value. In addition, a sleep comparator interfaces to the UVLO circuit

which turns the chip off when the input voltage is below the UVLO thresh-

old. This reduces the supply current to only 50µA, making the UC3573

ideal for battery powered applications.

• 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

BLOCK DIAGRAM

UDG-94106-1

SLUS346 - APRIL 1999

12 3 4 5

中文翻译

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型号	品牌	替代类型	描述	数据表
UC3573	TI	功能相似	Buck Pulse Width Modulator Stepdown Voltage Regulator

型号	品牌	获取价格	描述	数据表
UC2573D	TI	获取价格	Buck Pulse Width Modulator Stepdown Voltage Refgulator
UC2573DG4	TI	获取价格	Buck Pulse Width Modulator Stepdown Voltage Refgulator
UC2573DTR	TI	获取价格	Buck Pulse Width Modulator Stepdown Voltage Refgulator
UC2573DTRG4	TI	获取价格	Buck Pulse Width Modulator Stepdown Voltage Refgulator
UC2573J	ETC	获取价格	Analog IC
UC2573N	TI	获取价格	Buck Pulse Width Modulator Stepdown Voltage Refgulator
UC2573NG4	TI	获取价格	Buck Pulse Width Modulator Stepdown Voltage Refgulator
UC2577	TI	获取价格	Simple Step-Up Voltage Regulator
UC2577-ADJ	TI	获取价格	Simple Step-Up Voltage Regulator
UC2577D-12	TI	获取价格	6A SWITCHING REGULATOR, 62kHz SWITCHING FREQ-MAX, PSSO5, PLASTIC, TO-263, 5 PIN