TPS71745DSER集成电路（IC）的线性+开关稳压器规格书PDF中文资料

TPS71745DSER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TPS71745DSER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。

1 Features

1• Input Voltage: 2.5 V to 6.5 V

• Available in Multiple Output Versions:

– Fixed Output with Voltages from 0.9 V to 5 V

– Adjustable Output Voltage from 0.9 V to 6.2 V

• Ultra-High PSRR:

– 70 dB at 1 kHz, 67 dB at 100 kHz, and

45 dB at 1 MHz

• Excellent Load and Line Transient Response

• Very Low Dropout: 170 mV typical at 150 mA

• Low Noise: 30 μVRMS typical (100 Hz to 100 kHz)

• Small 5-pin SC-70, 2-mm × 2-mm WSON-6, and

1.5-mm × 1.5-mm WSON-6 Packages

2 Applications

• Camera Sensor Power

• Mobile Phone Handsets

• PDAs and Smartphones

• Wireless LAN, Bluetooth®

3 Description

The TPS717 family of low-dropout (LDO), low-power

linear regulators offers very high power-supply

rejection (PSRR) while maintaining very low 45-μA

ground current in an ultra-small, five-pin SOT

package. The family uses an advanced BiCMOS

process and a PMOS pass device to achieve fast

start-up, very low noise, excellent transient response,

and excellent PSRR performance. The TPS717 is

stable with a 1-μF ceramic output capacitor and uses

a precision voltage reference and feedback loop to

achieve a worst-case accuracy of 3% over all load,

line, process, and temperature variations. The device

family is fully specified from TJ = –40°C to 125°C and

is offered in a small SOT (SC70-5) package, a

2-mm × 2-mm WSON-6 package with a thermal pad,

and a 1.5-mm × 1.5-mm WSON-6 package, which

are ideal for small form factor portable equipment

(such as wireless handsets and PDAs).