TPS7A91

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1A、低噪声、高 PSRR、高精度、可调节超低压降稳压器

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数据表

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TPS7A91

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数据表

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产品详情

Rating

Catalog

Vin (max) (V)

6.5

Vin (min) (V)

1.4

Iout (max) (A)

1

Output options

Adjustable Output

Vout (max) (V)

5.2

Vout (min) (V)

0.8

Noise (µVrms)

4.7

PSRR at 100 KHz (dB)

48

Iq (typ) (mA)

2.1

Features

Enable, Foldback Overcurrent protection, Output discharge, Power good, Soft start

Thermal resistance θJA (°C/W)

57

Load capacitance (min) (µF)

22

Regulated outputs (#)

1

Accuracy (%)

1

Dropout voltage (Vdo) (typ) (mV)

130

Operating temperature range (°C)

-40 to 125

Rating

Catalog

Vin (max) (V)

6.5

Vin (min) (V)

1.4

Iout (max) (A)

1

Output options

Adjustable Output

Vout (max) (V)

5.2

Vout (min) (V)

0.8

Noise (µVrms)

4.7

PSRR at 100 KHz (dB)

48

Iq (typ) (mA)

2.1

Features

Enable, Foldback Overcurrent protection, Output discharge, Power good, Soft start

Thermal resistance θJA (°C/W)

57

Load capacitance (min) (µF)

22

Regulated outputs (#)

1

Accuracy (%)

1

Dropout voltage (Vdo) (typ) (mV)

130

Operating temperature range (°C)

-40 to 125

WSON (DSK)

10

6.25 mm² (2.5 mm × 2.5 mm)

1.0% accuracy over line, load, and temperature
Low output noise: 4.7µVRMS (10Hz – 100kHz)
Low dropout: 200mV (maximum) at 1A
Wide input voltage range: 1.4V to 6.5V
Wide output voltage range: 0.8V to 5.2V
High power-supply rejection ratio (PSRR):
- 70dB at DC
- 40dB at 100kHz
- 40dB at 1MHz
Fast transient response
Adjustable start-up in-rush control with selectable soft-start charging current
Open-drain power-good (PG) output
2.5mm × 2.5mm, 10-pin SON package

1.0% accuracy over line, load, and temperature
Low output noise: 4.7µVRMS (10Hz – 100kHz)
Low dropout: 200mV (maximum) at 1A
Wide input voltage range: 1.4V to 6.5V
Wide output voltage range: 0.8V to 5.2V
High power-supply rejection ratio (PSRR):
- 70dB at DC
- 40dB at 100kHz
- 40dB at 1MHz
Fast transient response
Adjustable start-up in-rush control with selectable soft-start charging current
Open-drain power-good (PG) output
2.5mm × 2.5mm, 10-pin SON package

The TPS7A91 is a low-noise (4.7µVRMS), low-dropout (LDO) voltage regulator capable of sourcing 1A with only 100mV of maximum dropout.

The TPS7A91 output is adjustable with external resistors from 0.8V to 5.7V. The TPS7A91 wide input voltage range supports operation as low as 1.4V and up to 6.5V.

With 1% output voltage accuracy (over line, load, and temperature) and soft-start capabilities to reduce in-rush current, the TPS7A91 is designed for powering sensitive analog low-voltage devices [such as voltage-controlled oscillators (VCOs), analog-to-digital converters (ADCs), digital-to-analog converters (DACs), high-end processors, and field-programmable gate arrays (FPGAs)].

The TPS7A91 is designed to power noise-sensitive components such as components found in high-speed communication, video, medical, or test and measurement applications. The very low 4.7µVRMS output noise and wideband PSRR (40dB at 1MHz) minimizes phase noise and clock jitter. These features maximize performance of clocking devices, ADCs, and DACs.

The TPS7A91 is a low-noise (4.7µVRMS), low-dropout (LDO) voltage regulator capable of sourcing 1A with only 100mV of maximum dropout.

The TPS7A91 output is adjustable with external resistors from 0.8V to 5.7V. The TPS7A91 wide input voltage range supports operation as low as 1.4V and up to 6.5V.

With 1% output voltage accuracy (over line, load, and temperature) and soft-start capabilities to reduce in-rush current, the TPS7A91 is designed for powering sensitive analog low-voltage devices [such as voltage-controlled oscillators (VCOs), analog-to-digital converters (ADCs), digital-to-analog converters (DACs), high-end processors, and field-programmable gate arrays (FPGAs)].

The TPS7A91 is designed to power noise-sensitive components such as components found in high-speed communication, video, medical, or test and measurement applications. The very low 4.7µVRMS output noise and wideband PSRR (40dB at 1MHz) minimizes phase noise and clock jitter. These features maximize performance of clocking devices, ADCs, and DACs.

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顶层文档	类型	标题	格式选项	下载最新的英语版本		日期
*	数据表	TPS7A91 1A, High-Accuracy, Low-Noise LDO Voltage Regulator 数据表 (Rev. A)	PDF \| HTML			2026-9-24
	白皮书	揭秘 LDO 开通（启动）时间	PDF \| HTML		PDF \| HTML	2026-4-27
	白皮书	使用并联 LDO 降低系统噪声	PDF \| HTML	英语版	PDF \| HTML	2025-11-20
	白皮书	Parallel LDO Architecture Design Using Ballast Resistors	PDF \| HTML			2022-12-14
	白皮书	Comprehensive Analysis and Universal Equations for Parallel LDO's Using Ballast	PDF \| HTML			2022-12-13
	技术文章	LDO basics: noise – how a feed-forward capacitor improves system performance	PDF \| HTML			2017-7-25
	技术文章	LDO basics: noise – how a noise-reduction pin improves system performance	PDF \| HTML			2017-6-14