LP2985

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150-mA, 16-V, low-dropout voltage regulator with enable

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Data sheet

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

LP2985

ACTIVE

Data sheet

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Product details

Output options

Fixed Output

Iout (max) (A)

0.15

Vin (max) (V)

16

Vin (min) (V)

2.2

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

Iq (typ) (mA)

0.065

Thermal resistance θJA (°C/W)

205.4, 206

Rating

Catalog

Load capacitance (min) (µF)

2.2

Regulated outputs (#)

1

Features

Enable

Accuracy (%)

5

PSRR at 100 KHz (dB)

40

Dropout voltage (Vdo) (typ) (mV)

280

Operating temperature range (°C)

-40 to 125

Output options

Fixed Output

Iout (max) (A)

0.15

Vin (max) (V)

16

Vin (min) (V)

2.2

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

Iq (typ) (mA)

0.065

Thermal resistance θJA (°C/W)

205.4, 206

Rating

Catalog

Load capacitance (min) (µF)

2.2

Regulated outputs (#)

1

Features

Enable

Accuracy (%)

5

PSRR at 100 KHz (dB)

40

Dropout voltage (Vdo) (typ) (mV)

280

Operating temperature range (°C)

-40 to 125

SOT-23 (DBV)

5

8.12 mm² 2.9 x 2.8

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

V IN range (new chip): 2.5 V to 16 V
V OUT range (new chip):
- 1.2 V to 5.0 V (fixed, 100-mV steps)
V OUT accuracy:
- ±1% for A-grade legacy chip
- ±1.5% for standard-grade legacy chip
- ±0.5% for new chip only
±1% output accuracy over load, and temperature for new chip
Output current: Up to 150 mA
Low I Q (new chip): 71 µA at I LOAD = 0 mA
Low I Q (new chip): 750 µA at I LOAD = 150 mA
Shutdown current:
- 0.01 µA (typ) for legacy chip
- 1.12 µA (typ) for new chip
Low noise: 30 µV RMS with 10-nF bypass capacitor
Output current limiting and thermal protection
Stable with 2.2-µF ceramic capacitors
High PSRR: 70 dB at 1 kHz, 40 dB at 1 MHz
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 2.5 V to 16 V and up to 150 mA of load current. The LP2985 supports an output range of 1.2 V to 5.0 V (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 30 µV RMS (with 10-nF bypass capacitors) and wide bandwidth PSRR performance of greater than 70 dB at 1 kHz and 40 dB at 1 MHz help attenuate the switching frequency of an upstream DC/DC converter and minimize post regulator filtering.

The internal soft-start time and current limit protection reduce inrush current during start up, thus minimizing input capacitance. Standard protection features, such as overcurrent and overtemperature protection, are included.

The LP2985 is available in a 5-pin 2.9-mm × 1.6-mm SOT-23 (DBV) package.

The LP2985 is a fixed-output, wide-input, low-noise, low-dropout voltage regulator supporting an input voltage range from 2.5 V to 16 V and up to 150 mA of load current. The LP2985 supports an output range of 1.2 V to 5.0 V (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 30 µV RMS (with 10-nF bypass capacitors) and wide bandwidth PSRR performance of greater than 70 dB at 1 kHz and 40 dB at 1 MHz help attenuate the switching frequency of an upstream DC/DC converter and minimize post regulator filtering.

The internal soft-start time and current limit protection reduce inrush current during start up, thus minimizing input capacitance. Standard protection features, such as overcurrent and overtemperature protection, are included.

The LP2985 is available in a 5-pin 2.9-mm × 1.6-mm SOT-23 (DBV) package.

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Technical documentation

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	Type	Title		Date
*	Data sheet	LP2985 150-mA, Low-Noise, Low-Dropout Regulator With Shutdown datasheet (Rev. R)	PDF \| HTML	10 Jul 2023
	Application note	LDO Noise Demystified (Rev. B)	PDF \| HTML	18 Aug 2020
	Application brief	16-Bit 8-Channel PLC Analog Input Module with High Voltage (±150 V) Common Mode		27 Apr 2020
	Application note	ESR, Stability, and the LDO Regulator (Rev. A)		07 Jan 2020
	Application note	A Topical Index of TI LDO Application Notes (Rev. F)		27 Jun 2019
	Application note	Fundamental Theory of PMOS LDO Voltage Regulators (Rev. A)		17 Aug 2018
	Application note	LDO PSRR Measurement Simplified (Rev. A)	PDF \| HTML	09 Aug 2017
	Application note	A Topical Index of TI Supply Voltage Supervisor (SVS) Application Notes		15 Jun 2015
	Application note	Linear power for automated industrial systems		09 Jan 2015
	Analog Design Journal	Techniques for accurate PSRR measurements		28 Oct 2013
	Application note	AN-1028 Maximum Power Enhancement Techniques for Power Packages (Rev. B)		06 May 2013
	Application note	AN-1482 LDO Regulator Stability Using Ceramic Output Capacitors (Rev. A)		25 Apr 2013
	Application note	AN-1815 LDOs Ease the Stress of Start-Up (Rev. A)		24 Apr 2013
	Application note	AN-1950 Silently Powering Low Noise Applications (Rev. A)		22 Apr 2013
	Application note	LDO Performance Near Dropout		08 Oct 2010
	Application note	3.6V – 5.5V Input, LDO Reference Design for MSP430 (Rev. A)		14 Jun 2010
	Application note	3.6V – 5.5V Input, LDO with Dual-Level Output Reference Design for MSP430 (Rev. A)		14 Jun 2010
	Application note	Packaging Limits Range of Linear Regulators		08 May 2010
	Application note	Simple Power Solution Using LDOs for the DM365 (Rev. A)		11 Sep 2009
	Application note	Digital Designer's Guide to Linear Voltage Regulators & Thermal Mgmt (LDO) (Rev. A)		04 Jun 2008
	Application note	Linear and Switching Voltage Regulator Fundamental Part 1		21 Mar 2007
	Application note	Ceramic Capacitors Replace Tantalum Capacitors in LDOs (Rev. A)		13 Oct 2006
	Application note	Understanding LDO Dropout		09 May 2005
	More literature	LP2981/85 Product Clip		09 Sep 2004
	Application note	Extending the Input Voltage Range of an LDO Regulator		16 Aug 2002
	Application note	Understanding the Terms and Definitions of LDO Voltage Regulators		21 Oct 1999
	Application note	Technical Review of Low Dropout Voltage Regulator Operation And Performance		30 Aug 1999
	Application brief	Low Power 150-mA LDO Linear Regulators. Extended Output Voltage Adjustment Range		11 Jun 1999

Design & development

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The DRV8837CEVM evaluation module (EVM) is a 3.3 V to 11 V, 1 A, brushed DC motor drive and control system based on the DRV8837C integrated brushed motor driver, compact MSP430G2131 microcontroller, and LP2985 Low-Dropout Regulator. The EVM allows for simple evaluation of the DRV8837C with a wide (...)

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Simulation model

LP2985-10 PSpice Transient Model

SLVMA21.ZIP (20 KB) - PSpice Model

LP2985

150-mA, 16-V, low-dropout voltage regulator with enable

LP2985

Product details

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