TPS78928DBVR集成电路（IC）的线性+开关稳压器规格书PDF中文资料

TPS78928DBVR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TPS78928DBVR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。

100-mA Low-Dropout Regulator

Available in 1.5-V, 1.8-V, 2.5-V, 2.8-V, 3.0-V

Output Noise Typically 56 μVRMS

(TPS78930)

Only 17 μA Quiescent Current at 100 mA

1 μA Quiescent Current in Standby Mode

Dropout Voltage Typically 115 mV at 100 mA

(TPS78930)

Over Current Limitation

–40°C to 125°C Operating Junction

Temperature Range

5-Pin SOT-23 (DBV) Package

description

The TPS789xx family of low-dropout (LDO)

voltage regulators offers the benefits of

low-dropout voltage, ultralow-power operation,

low-output noise, and miniaturized packaging.

These regulators feature low-dropout voltages

and ultralow quiescent current compared to

conventional LDO regulators. An internal resistor,

in conjunction with an external bypass capacitor,

creates a low-pass filter to reduce the noise. The

TPS78930 exhibits only 56 μVRMS of output

voltage noise using 0.01 μF bypass and 10 μF

output capacitors. Offered in a 5-terminal small

outline integrated-circuit SOT-23 package, the

TPS789xx series devices are ideal for

micropower operations, low output noise, and

where board space is limited.

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 115 mV at

100 mA of load current (TPS78930), and is

directly proportional to the load current. The

quiescent current is ultralow (17 μA typically) and

is stable over the entire range of output load

current (0 mA to 100 mA). Intended for use in

portable systems such as laptops and cellular

phones, the ultralow-dropout voltage feature and

ultralow-power operation result in a significant

increase in system battery operating life.