TPS7148Q集成电路（IC）的线性+开关稳压器规格书PDF中文资料

TPS7148Q属于集成电路（IC）的线性+开关稳压器。由德州仪器制造生产的TPS7148Q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。

Available in 5-V, 4.85-V, and 3.3-V

Fixed-Output and Adjustable Versions

Very Low-Dropout Voltage . . . Maximum of

32 mV at IO = 100 mA (TPS7150)

Very Low Quiescent Current – Independent

of Load . . . 285 μA Typ

Extremely Low Sleep-State Current

0.5 μA Max

2% Tolerance Over Specified Conditions

For Fixed-Output Versions

Output Current Range of 0 mA to 500 mA

TSSOP Package Option Offers Reduced

Component Height for Space-Critical

Applications

Power-Good (PG) Status Output

description

The TPS71xx integrated circuits are a family

of micropower low-dropout (LDO) voltage

regulators. An order of magnitude reduction in

dropout voltage and quiescent current over

conventional LDO performance is achieved by

replacing the typical pnp pass transistor with a

PMOS device.

Because the PMOS device behaves as a low-value resistor, the dropout voltage is very low (maximum of 32

mV at an output current of 100 mA for the TPS7150) and is directly proportional to the output current (see

Figure 1). Additionally, since the PMOS pass element is a voltage-driven device, the quiescent current is very

low and remains independent of output loading (typically 285 μA over the full range of output current, 0 mA to

500 mA). These two key specifications yield a significant improvement in operating life for battery-powered

systems. The LDO family also features a sleep mode; applying a TTL high signal to EN (enable) shuts down

the regulator, reducing the quiescent current to 0.5 μA maximum at TJ = 25°C.