TPS78825DBVT集成电路（IC）的线性+开关稳压器规格书PDF中文资料

TPS78825DBVT属于集成电路（IC）的线性+开关稳压器。由美国德州仪器公司制造生产的TPS78825DBVT稳压器 - 线性线性稳压器用于提供稳定的输出电压，无论负载电流、输入电压或环境因素如何变化，这些输出电压通常都要保持不变。它们的工作原理要求输入电压维持在高于所需的输出电压，而且要超出某个最小量，并且在工作时会将输入端的任何多余电压转换为热量。对于大多数应用而言，虽然这种稳压器的效率低于开关模式的稳压器，但它们通常更适合对噪声高度敏感的应用。

FEATURES

150-mA Low-Dropout Regulator

Available in 2.5 V, 3.3 V

Programmable Slew Rate Control

Output Noise Typically 56 μVRMS

Only 17 μA Quiescent Current at 150 mA

1 μA Quiescent Current in Standby Mode

Dropout Voltage Typically 150 mV at 150 mA

(TPS78833)

Over Current Limitation

–40°C to 125°C Operating Junction

Temperature Range

5-Pin SOT-23 (DBV) Package

DESCRIPTION

The TPS78825 and TPS78833 are very small (SOT-23)

package, low-noise LDOs that regulate the output

voltage to 2.5 V and 3.3 V with input voltage ranging

from 2.7 V to an absolute maximum of 13.5 V. These

devices output 150 mA with a peak current of 350 mA

(typ). The TPS788xx family uses the SR pin to program

the output voltage slew rate to control the in-rush

current. This is specifically used in the USB application

where large load capacitance is present at start-up. The

TPS788xx devices use only 17 μA of quiescent current

and exhibit only 56 μVRMS of output voltage noise using

a 10 μF output capacitor.

The usual PNP pass transistor has been replaced by a

PMOS pass element. Because the PMOS pass element

behaves as a low-value resistor, the dropout voltage is

very low, typically 150 mV at 150 mA of load current, and

is directly proportional to the load current.

The TPS788xx also features a logic-enabled sleep

mode to shut down the regulator, reducing quiescent

current to 1 μA typical at TJ = 25°C.