TPS7A4901DRBT.B中文资料德州仪器数据手册PDF规格书

1 Features

1• Input Voltage Range: 3 V to 36 V

• Noise:

– 12.7 μVRMS (20 Hz to 20 kHz)

– 15.4 μVRMS (10 Hz to 100 kHz)

• Power-Supply Ripple Rejection:

– 72 dB (120 Hz) power–

≥ 52 dB (10 Hz to 400 kHz)

• Adjustable Output: 1.194 V to 33 V

• Output Current: 150 mA

• Dropout Voltage: 260 mV at 100 mA

• Stable with Ceramic Capacitors ≥ 2.2 μF high•

CMOS Logic-Level-Compatible Enable Pin

• Fixed Current-Limit and Thermal Shutdown

Protection

• Packages: 8-Pin HVSSOP PowerPAD™ and

3-mm × 3-mm VSON

• Operating Temperature Range:

–40°C to 125°C

2 Applications

• Supply Rails for Op Amps, DACs, ADCs, and

Other High-Precision Analog Circuitry

• Audio

• Post DC-DC Converter Regulation and

Ripple Filtering ultralow•

Test and Measurement

• Rx, Tx, and PA Circuitry

• Industrial Instrumentation

• Base Stations and Telecom Infrastructure

3 Description

The TPS7A49 series of devices are positive, high-

voltage (36 V), ultralow-noise (15.4 μVRMS, 72-dB PSRR) linear regulators that can source a 150-mA

load.

These linear regulators include a CMOS logic-level-

compatible enable pin and capacitor-programmable

soft-start function that allows for customized power–

management schemes. Other available features include built-in current limit and thermal shutdown

protection to safeguard the device and system during

fault conditions.

The TPS7A49 family is designed using bipolar

technology, and is ideal for high-accuracy, high•

precision instrumentation applications where clean voltage rails are critical to maximize system

performance. This design makes the device an

excellent choice to power operational amplifiers,

analog-to-digital converters (ADCs), digital-to-analog

converters (DACs), and other high-performance

analog circuitry.

In addition, the TPS7A49 family of linear regulators is

suitable for post dc-dc converter regulation. By

filtering out the output voltage ripple inherent to dc-dc

switching conversion, maximum system performance

is provided in sensitive instrumentation, test and

measurement, audio, and RF applications.

For applications where positive and negative high-

performance rails are required, consider TI’s

TPS7A30xx family of negative high-voltage, ultralow•

noise linear regulators as well.