TPS7250QP低压差稳压器 LDO原装TI德州仪器

description

The TPS72xx family of low-dropout (LDO) voltage

regulators offers the benefits of low-dropout

voltage, micropower operation, and miniaturized

packaging. These regulators feature extremely

low dropout voltages and quiescent currents

compared to conventional LDO regulators.

Offered in small-outline integrated-circuit (SOIC)

packages and 8-terminal thin shrink small-outline

(TSSOP), the TPS72xx series devices are ideal

for cost-sensitive designs and for designs where

board space is at a premium.

A combination of new circuit design and process

innovation has enabled the usual pnp pass

transistor to be replaced by a PMOS device.

Because the PMOS pass element behaves as a

low-value resistor, the dropout voltage is very low

– maximum of 85 mV at 100 mA of load current

(TPS7250) – and is directly proportional to the

load current (see Figure 1). Since the PMOS pass

element is a voltage-driven device, the quiescent current is very low (300 μA maximum) and is stable over the

entire range of output load current (0 mA to 250 mA). Intended for use in portable systems such as laptops and

cellular phones, the low-dropout voltage and micropower operation result in a significant increase in system

battery operating life.
TPS7250QPTPS7250QPTPS7250QPTPS7250QP

描述

TPS72xx系列低电压(LDO)

监管者提供了低辍学率的好处

电压，微功率操作，微型化

包装。这些监管者

低电压和静止电流

与传统的LDO调节器相比。

小轮廓集成电路(SOIC)

包装和8端薄收缩小轮廓

(TSSOP)， TPS72xx系列设备是理想的

对于成本敏感的设计和设计地点

董事会空间是一个溢价。

结合了新的电路设计和工艺

创新使普通的pnp通过率成为可能

用PMOS器件代替晶体管。

因为PMOS传递元素表现为a

低电阻器，漏电压很低

-负载电流100毫安时最大85 mV

(TPS7250) -与

负载电流(见图1)。由于PMOS通过

元素是一个voltage-driven设备,静态电流很低(300μA最大)和稳定

整个输出负载电流范围(0毫安至250毫安)。用于便携式系统，如笔记本电脑和

移动电话，低电压和微功率操作导致系统的显著增加

电池使用寿命。