LP2985IM5X-2.0 Equivalent & Substitute Parts

Part Overview

The LP2985IM5X-2.0 is a linear voltage regulator IC from Texas Instruments, delivering positive fixed 2V output at 150mA in SOT-23-5 surface mount packaging. This device is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The regulator integrates over-current, over-temperature, and short-circuit protection with an enable control feature, operating across -40°C to 125°C.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Output Configuration	Positive
Output Type	Fixed
Voltage - Output (Fixed)	2V
Voltage - Input (Max)	16V
Current - Output	150mA
Voltage Dropout (Max)	0.58V @ 150mA
Current - Quiescent (Iq)	95 µA
PSRR	45dB (1kHz)
Package / Case	SC-74A, SOT-753
Supplier Device Package	SOT-23-5
Operating Temperature	-40°C ~ 125°C
Protection Features	Over Current, Over Temperature, Short Circuit
Control Features	Enable
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the LP2985IM5X-2.0 is determined by strict alignment of electrical and mechanical parameters. The critical substitution criteria are:

Electrical Parameters (Must Match):

Output voltage: 2V fixed
Output current capability: 150mA minimum
Input voltage range: 16V maximum or higher
Voltage dropout: 0.58V @ 150mA or lower
Operating temperature range: -40°C to 125°C
Protection features: Over-current, over-temperature, short-circuit
Control features: Enable function

Mechanical Parameters (Must Match):

Package type: SOT-23-5 or TSOT-23-5
Mounting type: Surface mount

Substitute parts are grouped into two categories:

Direct Equivalents (Parametric Match): LP2985IM5-2.0/NOPB, LP2985AIM5-2.0/NOPB, LP2985AIM5X-2.0/NOPB, and LP2985IM5X-2.0/NOPB meet all electrical and mechanical specifications identically. These differ only in product status and packaging format (tape & reel, cut tape, or bulk).

Functional Equivalents (Reduced Output Current): LT1761ES5-2#TRMPBF, LT1761ES5-2#TRPBF, and LT1761IS5-2#TRPBF from Analog Devices provide 2V fixed output with 100mA current capability. These are suitable where the application requires less than 100mA. They offer superior voltage dropout (0.45V @ 100mA) and higher input voltage tolerance (20V maximum).

Alternative with Reduced Input Voltage Range: MIC5247-2.0YM5-TR from Microchip Technology delivers 150mA at 2V output with exceptional voltage dropout (0.15V @ 150mA). However, its maximum input voltage is limited to 6V, restricting use to applications with lower input voltage sources.

Parameter Comparison

Part Number	Manufacturer	Output Current	Voltage Dropout (Max)	Input Voltage (Max)	Quiescent Current	PSRR	Package	Product Status
LP2985IM5X-2.0	Texas Instruments	150mA	0.58V @ 150mA	16V	95 µA	45dB (1kHz)	SOT-23-5	Obsolete
LP2985IM5X-2.0/NOPB	National Semiconductor	150mA	0.58V @ 150mA	16V	95 µA	45dB (1kHz)	SOT-23-5	Active
LP2985AIM5-2.0/NOPB	Texas Instruments	150mA	0.58V @ 150mA	16V	95 µA	45dB (1kHz)	SOT-23-5	Obsolete
LP2985AIM5X-2.0/NOPB	Texas Instruments	150mA	0.58V @ 150mA	16V	95 µA	45dB (1kHz)	SOT-23-5	Last Time Buy
LP2985IM5-2.0/NOPB	Texas Instruments	150mA	0.58V @ 150mA	16V	95 µA	45dB (1kHz)	SOT-23-5	Active
LT1761ES5-2#TRMPBF	Analog Devices Inc.	100mA	0.45V @ 100mA	20V	—	65dB (120Hz)	TSOT-23-5	Active
LT1761ES5-2#TRPBF	Analog Devices Inc.	100mA	0.45V @ 100mA	20V	—	65dB (120Hz)	TSOT-23-5	Active
LT1761IS5-2#TRPBF	Analog Devices Inc.	100mA	0.45V @ 100mA	20V	—	65dB (120Hz)	TSOT-23-5	Active
MIC5247-2.0YM5-TR	Microchip Technology	150mA	0.15V @ 150mA	6V	150 µA	50dB (1kHz)	SOT-23-5	Active

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications): Select LP2985IM5-2.0/NOPB (Active status, tape & reel packaging) as the primary choice for new designs and production continuity. This part maintains all electrical and mechanical specifications of the obsolete LP2985IM5X-2.0 while offering active product status and established supply availability.

For Reduced Current Applications (≤100mA): The LT1761 series (LT1761ES5-2#TRMPBF, LT1761ES5-2#TRPBF, LT1761IS5-2#TRPBF) from Analog Devices provides superior performance characteristics with lower voltage dropout (0.45V vs. 0.58V) and higher input voltage tolerance (20V vs. 16V). These are suitable for applications where output current does not exceed 100mA. All three variants are in active production status with ROHS3 compliance.

For Low Input Voltage Applications (≤6V): MIC5247-2.0YM5-TR offers exceptional voltage dropout performance (0.15V @ 150mA) and maintains 150mA output current capability. This part is restricted to input voltage sources not exceeding 6V. Select this only when input voltage range limitation aligns with application requirements and superior dropout performance is critical.

Compliance Considerations: All recommended substitutes carry ROHS3 compliance and REACH unaffected status. The original LP2985IM5X-2.0 is RoHS non-compliant; migration to compliant alternatives is recommended for new designs and long-term supply security.

Frequently Asked Questions (FAQ)

Q: Can LP2985IM5-2.0/NOPB directly replace LP2985IM5X-2.0 in existing designs?

A: Yes. Both parts share identical electrical specifications (2V output, 150mA current, 0.58V dropout @ 150mA, 16V input maximum) and mechanical packaging (SOT-23-5). The difference is product status (active vs. obsolete) and packaging format. No circuit modifications are required.

Q: What is the difference between LP2985IM5X-2.0/NOPB and LP2985IM5-2.0/NOPB?

A: Both are from National Semiconductor and Texas Instruments respectively, with identical electrical parameters. The primary difference is packaging format: LP2985IM5X-2.0/NOPB is supplied in bulk, while LP2985IM5-2.0/NOPB is supplied in tape & reel format. Select based on procurement and assembly requirements.

Q: Why would I choose LT1761 over LP2985 if the current is lower?

A: LT1761 variants are suitable when application current requirements do not exceed 100mA. They offer advantages including lower voltage dropout (0.45V vs. 0.58V), higher input voltage tolerance (20V vs. 16V), and active production status. These characteristics reduce power dissipation and provide greater design margin in high-input-voltage applications.

Q: Is MIC5247-2.0YM5-TR a suitable replacement for 150mA applications?

A: MIC5247-2.0YM5-TR maintains 150mA output current and offers superior voltage dropout (0.15V @ 150mA). However, its maximum input voltage is limited to 6V. Use this part only in applications where input voltage does not exceed 6V. If your application requires higher input voltage (up to 16V), select LP2985IM5-2.0/NOPB instead.

Q: Are all substitute parts available in SOT-23-5 packaging?

A: LP2985 variants are supplied in SOT-23-5 (SC-74A, SOT-753). LT1761 variants use TSOT-23-5 (SOT-23-5 Thin), which is mechanically and electrically compatible with standard SOT-23-5 footprints. MIC5247-2.0YM5-TR is supplied in SOT-23-5. All are surface mount compatible with standard SOT-23-5 PCB layouts.

Q: What is the difference between LT1761ES5-2#TRMPBF and LT1761ES5-2#TRPBF?

A: Both parts are electrically identical with 100mA output, 2V fixed output, and 0.45V dropout @ 100mA. The difference is in tape packaging material specification (TRMPBF vs. TRPBF). Select based on your assembly process requirements; both are functionally equivalent for circuit design purposes.

Q: Are all substitute parts RoHS compliant?

A: Yes. LP2985IM5-2.0/NOPB, LP2985AIM5-2.0/NOPB, LP2985AIM5X-2.0/NOPB, all LT1761 variants, and MIC5247-2.0YM5-TR carry ROHS3 compliance. The original LP2985IM5X-2.0 is RoHS non-compliant. Migration to compliant alternatives is recommended for regulatory alignment.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message