TPS76427集成电路（IC）的线性+开关稳压器规格书PDF中文资料

TPS76427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TPS76427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。

150-mA Low Noise, Low-Dropout Regulator

Output Voltage: 2.5 V, 2.7 V, 2.8 V, 3.0 V, 3.3 V

Output Noise Typically 50 μV

Quiescent Current Typically 85 μA

Dropout Voltage, Typically 300 mV

at 150 mA

Thermal Protection

Over Current Limitation

Less Than 2-μA Quiescent Current in

Shutdown Mode

–40°C to 125°C Operating Junction

Temperature Range

5-Pin SOT-23 (DBV) Package

description

The TPS764xx family of low-dropout (LDO) voltage regulators offers the benefits of a low noise, low-dropout

voltage, low-power operation, and miniaturized package. Additionally, they feature low quiescent current when

compared to conventional LDO regulators. Offered in 5-terminal small outline integrated-circuit SOT-23

package, the TPS764xx series devices are ideal for low-noise applications, cost-sensitive designs and

applications 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 pass element. Because the PMOS pass element behaves as a low-value resistor, the

dropout voltage is very low—typically 300 mV at 150 mA of load current (TPS76433)—and is directly

proportional to the load current. Since the PMOS pass element is a voltage-driven device, the quiescent current

is very low (140 μA maximum) and is stable over the entire range of output load current (0 mA to 150 mA).

Intended for use in portable systems such as laptops and cellular phones, the low-dropout voltage feature and

low-power operation result in a significant increase in system battery operating life.

The TPS764xx also features a logic-enabled sleep mode to shut down the regulator, reducing quiescent current

to 1 μA maximum at TJ = 25°C.The TPS764xx is offered in 2.5-V, 2.7-V, 2.8-V, 3.0-V, and 3.3-V fixed-voltages.