LP2985

現行

具啟用功能的 150-mA、16-V、低壓差電壓穩壓器

立即訂購

產品規格表

document-pdfAcrobat LP2985 150mA, Low-Noise, Low-Dropout Regulator With Shutdown datasheet (Rev. S) (英文) PDF | HTML

LP2985

現行

立即訂購

產品詳細資料

Rating

Catalog

Vin (max) (V)

16

Vin (min) (V)

2.2

Iout (max) (A)

0.15

Output options

Fixed Output

Vout (max) (V)

10

Vout (min) (V)

1.8

Fixed output options (V)

1.25, 1.5, 1.8, 2.5, 2.8, 2.85, 2.9, 3, 3.1, 3.3, 5, 10

Noise (µVrms)

30

PSRR at 100 KHz (dB)

40

Iq (typ) (mA)

0.065

Features

Enable

Thermal resistance θJA (°C/W)

205.4, 206

Load capacitance (min) (µF)

2.2

Regulated outputs (#)

1

Accuracy (%)

5

Dropout voltage (Vdo) (typ) (mV)

280

Operating temperature range (°C)

-40 to 125

Rating

Catalog

Vin (max) (V)

16

Vin (min) (V)

2.2

Iout (max) (A)

0.15

Output options

Fixed Output

Vout (max) (V)

10

Vout (min) (V)

1.8

Fixed output options (V)

1.25, 1.5, 1.8, 2.5, 2.8, 2.85, 2.9, 3, 3.1, 3.3, 5, 10

Noise (µVrms)

30

PSRR at 100 KHz (dB)

40

Iq (typ) (mA)

0.065

Features

Enable

Thermal resistance θJA (°C/W)

205.4, 206

Load capacitance (min) (µF)

2.2

Regulated outputs (#)

1

Accuracy (%)

5

Dropout voltage (Vdo) (typ) (mV)

280

Operating temperature range (°C)

-40 to 125

SOT-23 (DBV)

5

8.12 mm² (2.9 mm × 2.8 mm)

VIN range (new chip): 2.5V to 16V
VOUT range (new chip):
- 1.2V to 5.0V (fixed, 100mV steps)
VOUT accuracy:
- ±1% for A-grade (legacy chip)
- ±1.5% for standard-grade (legacy chip)
- ±0.5% (new chip)
±1% output accuracy over load and temperature (new chip)
Output current: Up to 150mA
Low IQ (new chip): 71µA at ILOAD = 0mA
Low IQ (new chip): 750µA at ILOAD = 150mA
Shutdown current:
- 0.01µA (typ, legacy chip)
- 1.12µA (typ, new chip)
Low noise: 30µVRMS with 10nF bypass capacitor
Output current limiting and thermal protection
Stable with 2.2µF ceramic capacitors (new chip)
High PSRR: 70dB at 1kHz, 40dB at 1MHz (new chip)
Operating junction temperature: –40°C to +125°C
Package: 5-pin SOT-23 (DBV)

VIN range (new chip): 2.5V to 16V
VOUT range (new chip):
- 1.2V to 5.0V (fixed, 100mV steps)
VOUT accuracy:
- ±1% for A-grade (legacy chip)
- ±1.5% for standard-grade (legacy chip)
- ±0.5% (new chip)
±1% output accuracy over load and temperature (new chip)
Output current: Up to 150mA
Low IQ (new chip): 71µA at ILOAD = 0mA
Low IQ (new chip): 750µA at ILOAD = 150mA
Shutdown current:
- 0.01µA (typ, legacy chip)
- 1.12µA (typ, new chip)
Low noise: 30µVRMS with 10nF bypass capacitor
Output current limiting and thermal protection
Stable with 2.2µF ceramic capacitors (new chip)
High PSRR: 70dB at 1kHz, 40dB at 1MHz (new chip)
Operating junction temperature: –40°C to +125°C
Package: 5-pin SOT-23 (DBV)

The LP2985 is a fixed-output, wide-input, low-noise, low-dropout voltage regulator supporting an input voltage range from 2.5V to 16V (for new chip) and up to 150mA of load current. The LP2985 supports an output range of 1.2V to 5.0V (for new chip).

Additionally, the LP2985 (new chip) has a ±1% output accuracy across load, and temperature that can meet the needs of low-voltage microcontrollers (MCUs) and processors.

Low output noise of 30µVRMS (with 10nF bypass capacitors) and wide bandwidth PSRR performance of greater than 70dB at 1kHz and 40dB at 1MHz help attenuate the switching frequency of an upstream DC/DC converter and minimize post regulator filtering.

The new chip provides internal soft-start mechanism to reduce inrush current during start up, thus minimizing input capacitance. Standard protection features, such as overcurrent and overtemperature protection, are also included.

The LP2985 is available in a 5-pin 2.9mm × 2.8mm SOT-23 (DBV) package.

The LP2985 is a fixed-output, wide-input, low-noise, low-dropout voltage regulator supporting an input voltage range from 2.5V to 16V (for new chip) and up to 150mA of load current. The LP2985 supports an output range of 1.2V to 5.0V (for new chip).

Additionally, the LP2985 (new chip) has a ±1% output accuracy across load, and temperature that can meet the needs of low-voltage microcontrollers (MCUs) and processors.

Low output noise of 30µVRMS (with 10nF bypass capacitors) and wide bandwidth PSRR performance of greater than 70dB at 1kHz and 40dB at 1MHz help attenuate the switching frequency of an upstream DC/DC converter and minimize post regulator filtering.

The new chip provides internal soft-start mechanism to reduce inrush current during start up, thus minimizing input capacitance. Standard protection features, such as overcurrent and overtemperature protection, are also included.

The LP2985 is available in a 5-pin 2.9mm × 2.8mm SOT-23 (DBV) package.

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LP2985A

現行

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重要文件	類型	標題	格式選項
*	資料表	LP2985 150mA, Low-Noise, Low-Dropout Regulator With Shutdown datasheet (Rev. S)	PDF \| HTML	2025/5/23
	應用說明	An empirical analysis of the impact of board layout on LDO thermal performance (Rev. A)	PDF \| HTML	2025/9/23
	應用說明	LDO Noise Demystified (Rev. B)	PDF \| HTML	2020/8/18
	Application brief	16-Bit 8-Channel PLC Analog Input Module with High Voltage (±150 V) Common Mode		2020/4/27
	應用說明	ESR, Stability, and the LDO Regulator (Rev. A)		2020/1/7
	應用說明	A Topical Index of TI LDO Application Notes (Rev. F)		2019/6/27
	電子書	LDO Basics (Rev. A)		2019/4/8
	應用說明	Fundamental Theory of PMOS LDO Voltage Regulators (Rev. A)		2018/8/17
	應用說明	LDO PSRR Measurement Simplified (Rev. A)	PDF \| HTML	2017/8/9
	技術文章	LDO basics: dropout	PDF \| HTML	2017/3/16
	應用說明	A Topical Index of TI Supply Voltage Supervisor (SVS) Application Notes		2015/6/15
	應用說明	Linear power for automated industrial systems		2015/1/9
	類比設計期刊	Techniques for accurate PSRR measurements		2013/10/28
	應用說明	AN-1028 Maximum Power Enhancement Techniques for Power Packages (Rev. B)		2013/5/6
	應用說明	AN-1482 LDO Regulator Stability Using Ceramic Output Capacitors (Rev. A)		2013/4/25
	應用說明	AN-1815 LDOs Ease the Stress of Start-Up (Rev. A)		2013/4/24
	應用說明	AN-1950 Silently Powering Low Noise Applications (Rev. A)		2013/4/22
	應用說明	LDO Performance Near Dropout		2010/10/8
	應用說明	3.6V – 5.5V Input, LDO with Dual-Level Output Reference Design for MSP430 (Rev. A)		2010/6/14
	應用說明	3.6V – 5.5V Input, LDO Reference Design for MSP430 (Rev. A)		2010/6/14
	應用說明	Packaging Limits Range of Linear Regulators		2010/5/8
	應用說明	Simple Power Solution Using LDOs for the DM365 (Rev. A)		2009/9/11
	應用說明	Digital Designer's Guide to Linear Voltage Regulators & Thermal Mgmt (LDO) (Rev. A)		2008/6/4
	應用說明	Linear and Switching Voltage Regulator Fundamental Part 1		2007/3/21
	應用說明	Ceramic Capacitors Replace Tantalum Capacitors in LDOs (Rev. A)		2006/10/13
	應用說明	Understanding LDO Dropout		2005/5/9
	更多文件說明	LP2981/85 Product Clip		2004/9/9
	應用說明	Extending the Input Voltage Range of an LDO Regulator		2002/8/16
	應用說明	Understanding the Terms and Definitions of LDO Voltage Regulators		1999/10/21
	應用說明	Technical Review of Low Dropout Voltage Regulator Operation And Performance		1999/8/30
	Application brief	Low Power 150-mA LDO Linear Regulators. Extended Output Voltage Adjustment Range		1999/6/11

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開發板

DRV8835EVM — DRV8835 評估模組

The DRV8835 evaluation module (EVM) demonstrates the capabilities and performance of the DRV8835 motor driver from Texas Instruments. User can control the DRV8835 with an external microcontroller via signal header connectors or use on-board switches for stand-alone operation.

使用指南: PDF

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DRV8837CEVM — 1A 低電壓全橋評估模組

DRV8837CEVM 評估模組 (EVM) 是一款基於 DRV8837C 整合式有刷馬達驅動器、MSP430G2131 微型控制器和 LP2985 低壓差穩壓器的 3.3V 至 11V、1A 有刷 DC 馬達驅動與控制系統。EVM 能簡單評估 DRV8837C，並提供多種測試點、介面及配置選項。

EVM 配備 Micro-USB 連接器可提供簡易的 5V 馬達電源、由 LP2985 LDO 穩壓的 3.3V 電源、所有控制與回饋訊號的測試點，以及 MSP430G2131 上的簡易整合控制邏輯。EVM 提供簡易的跨接器介面，可控制馬達方向並評估 DRV8837C 在低功耗睡眠模式下的狀態。 (...)