MP3310EQ-LF-Z LED Driver IC Equivalent & Substitute Parts

Part Overview

The MP3310EQ-LF-Z is an active LED driver IC manufactured by Monolithic Power Systems Inc., classified as a Power Management PMIC. This device functions as a 1-output DC-DC regulator with step-up (boost) topology, delivering 1.3A switch current with PWM dimming capability at 1MHz frequency. The part is designed for backlight applications and operates across a supply voltage range of 4.5V to 25V with an operating temperature range of -20°C to 85°C. The MP3310EQ-LF-Z is currently in active product status with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1). Substitute parts are identified when equivalent electrical performance, topology, and functional characteristics align with the original specification, enabling direct replacement in circuit designs where packaging and thermal requirements permit.

Key Parameters

Parameter	MP3310EQ-LF-Z Value
Manufacturer	Monolithic Power Systems Inc.
Category	Power Management (PMIC)
Type	DC DC Regulator
Topology	Step-Up (Boost)
Number of Outputs	1
Voltage - Supply (Min)	4.5V
Voltage - Supply (Max)	25V
Current - Output / Channel	1.3A (Switch)
Frequency	1MHz
Dimming	PWM
Applications	Backlight
Operating Temperature	-20°C ~ 85°C (TA)
Package / Case	10-VFDFN Exposed Pad
Supplier Device Package	10-QFN (3x3)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for the MP3310EQ-LF-Z are categorized based on strict alignment with core electrical and functional parameters. The primary substitution criteria are: DC-DC regulator topology (step-up/boost), single output configuration, PWM dimming capability, and operating voltage range compatibility. Parts are grouped into two categories:

Category 1: Parametric Equivalents — Parts with identical or near-identical electrical specifications, topology, and package form factor. These parts maintain the same supply voltage range (4.5V–25V), output current capability (1.3A or higher), and frequency characteristics (1MHz or compatible). The MP3310EQ-LF-P qualifies as a parametric equivalent, differing only in packaging format (Tape & Reel vs. standard packaging).

Category 2: Functional Alternatives — Parts with step-up (boost) topology, PWM dimming, and single-output configuration but with variations in supply voltage range, output current, frequency, or package type. These alternatives maintain core LED driver functionality and backlight application suitability while accommodating different circuit requirements. Substitution within this category requires verification of supply voltage compatibility and output current sufficiency for the target application.

Key Parameters Determining Substitution:

Topology: Step-Up (Boost) required
Dimming Method: PWM required
Number of Outputs: 1 required
Supply Voltage Range: Minimum 4.5V input capability preferred
Output Current: 1.3A or greater preferred for direct replacement
Applications: Backlight or compatible LED driver function

Parameter Comparison

Parameter	MP3310EQ-LF-Z	MP3310EQ-LF-P	AP3031KTR-G1	LM3565TLX/NOPB	LT3477EUF#PBF	LT3491ESC8#TRPBF	LT3591EDDB#TRMPBF	MIC2291YD5-TR
Manufacturer	MPS	MPS	Diodes Inc.	Texas Instruments	Analog Devices	Analog Devices	Analog Devices	Microchip
Type	DC DC Regulator	DC DC Regulator	DC DC Regulator	DC DC Regulator	DC DC Regulator	DC DC Regulator	DC DC Regulator	DC DC Regulator
Topology	Step-Up (Boost)	Step-Up (Boost)	Step-Up (Boost)	Step-Up (Boost)	Flyback, SEPIC, Buck, Boost	Step-Up (Boost)	Step-Up (Boost)	Step-Up (Boost)
Number of Outputs	1	1	1	1	1	1	1	1
Voltage - Supply (Min)	4.5V	4.5V	2.7V	2.5V	2.5V	2.5V	2.5V	2.5V
Voltage - Supply (Max)	25V	25V	16V	5.5V	25V	12V	12V	10V
Current - Output / Channel	1.3A (Switch)	1.3A (Switch)	1.4A (Switch)	930mA (Flash)	3A (Switch)	350mA (Switch)	500mA (Switch)	1.2A (Switch)
Frequency	1MHz	1MHz	1MHz	4MHz	200kHz–4.6MHz	2.3MHz	1MHz	1.2MHz
Dimming	PWM	PWM	PWM	PWM	PWM	PWM	PWM	Analog, PWM
Applications	Backlight	Backlight	Backlight	Camera Flash	—	Backlight	Backlight	Camera Flash
Operating Temperature	-20°C ~ 85°C (TA)	-20°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-30°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TJ)	-40°C ~ 125°C (TJ)
Package / Case	10-VFDFN Exposed Pad	10-VFDFN Exposed Pad	SOT-23-6 Thin, TSOT-23-6	16-WFBGA, DSBGA	20-WFQFN Exposed Pad	8-VFSOP (0.049", 1.25mm Width)	8-WFDFN Exposed Pad	SOT-23-5 Thin, TSOT-23-5
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

MP3310EQ-LF-P — Direct parametric equivalent with identical electrical specifications and topology. Differs only in packaging format (Tape & Reel). Recommended for applications requiring the same supply voltage range (4.5V–25V) and 1.3A output current. Both parts maintain active product status and ROHS3 compliance.

AP3031KTR-G1 — Functional alternative with step-up (boost) topology and 1.4A output current capability. Supply voltage range (2.7V–16V) is narrower than the original part; suitable for applications operating within 4.5V–16V input range. Package form factor differs (TSOT-23-6 vs. 10-QFN). Active product status and ROHS3 compliance maintained.

LT3477EUF#PBF — Multi-topology regulator supporting step-up (boost) configuration with 3A output current and extended supply voltage range (2.5V–25V). Frequency range (200kHz–4.6MHz) provides flexibility. Package size differs (20-QFN vs. 10-QFN). Suitable for applications requiring higher output current or topology flexibility. Active product status and ROHS3 compliance maintained.

LT3491ESC8#TRPBF — Step-up (boost) topology with reduced output current (350mA) and narrower supply voltage range (2.5V–12V). Suitable for lower-power backlight applications. Package differs (SC-70-8 vs. 10-QFN). Active product status and ROHS3 compliance maintained.

LT3591EDDB#TRMPBF — Step-up (boost) topology with 500mA output current and 1MHz frequency matching the original part. Supply voltage range (2.5V–12V) is narrower. Suitable for moderate-power backlight applications. Package differs (8-DFN vs. 10-QFN). Active product status and ROHS3 compliance maintained.

MIC2291YD5-TR — Step-up (boost) topology with 1.2A output current and dual dimming capability (analog and PWM). Supply voltage range (2.5V–10V) is narrower than the original. Operating temperature range extends to 125°C (TJ). Suitable for applications requiring analog dimming flexibility. Package differs (TSOT-23-5 vs. 10-QFN). Active product status and ROHS3 compliance maintained.

All substitute parts maintain active product status, ROHS3 compliance, and MSL 1 (unlimited) moisture sensitivity level, ensuring regulatory and environmental compatibility with the original MP3310EQ-LF-Z specification.

Frequently Asked Questions (FAQ)

Q: Can MP3310EQ-LF-P be used as a direct replacement for MP3310EQ-LF-Z?

A: Yes. MP3310EQ-LF-P is a parametric equivalent with identical electrical specifications, topology, frequency, and package type. The only difference is packaging format (Tape & Reel vs. standard packaging). Both parts operate across 4.5V–25V supply range with 1.3A output current and 1MHz frequency.

Q: What is the primary difference between MP3310EQ-LF-Z and AP3031KTR-G1?

A: Both are step-up (boost) LED drivers with PWM dimming and similar output current (1.3A vs. 1.4A). Key differences are: supply voltage range (MP3310: 4.5V–25V; AP3031: 2.7V–16V), package type (10-QFN vs. TSOT-23-6), and operating temperature (MP3310: -20°C–85°C; AP3031: -40°C–85°C). AP3031KTR-G1 is suitable for applications within the 4.5V–16V input range.

Q: When should LT3477EUF#PBF be selected over MP3310EQ-LF-Z?

A: LT3477EUF#PBF offers higher output current (3A vs. 1.3A) and multi-topology support (Flyback, SEPIC, Buck, Boost). Select this part when higher current capacity is required or when topology flexibility is needed. Supply voltage range (2.5V–25V) is broader. Package size is larger (20-QFN vs. 10-QFN).

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance and MSL 1 (unlimited) moisture sensitivity level, matching the regulatory and environmental specifications of the original MP3310EQ-LF-Z.

Q: What is the impact of package differences when substituting parts?

A: Package differences affect PCB layout, thermal management, and board space requirements. MP3310EQ-LF-Z uses 10-QFN (3x3) package. Substitutes use different packages (TSOT-23-6, 16-DSBGA, SC-70-8, 8-DFN, TSOT-23-5). Verify PCB footprint compatibility and thermal performance requirements before substitution.

Q: Can LT3491ESC8#TRPBF or LT3591EDDB#TRMPBF replace MP3310EQ-LF-Z in high-current applications?

A: No. Both parts have reduced output current (350mA and 500mA respectively) compared to MP3310EQ-LF-Z (1.3A). These parts are suitable only for lower-power backlight applications. For applications requiring 1.3A or higher output current, select AP3031KTR-G1, LT3477EUF#PBF, or MIC2291YD5-TR.

Q: What is the operating temperature range consideration for substitution?

A: MP3310EQ-LF-Z operates -20°C to 85°C (TA). Most substitutes extend the lower temperature limit to -40°C and some extend the upper limit to 125°C (TJ). Verify that the substitute part's operating temperature range meets or exceeds the application requirements.

Q: Does MIC2291YD5-TR offer advantages over MP3310EQ-LF-Z?

A: MIC2291YD5-TR provides dual dimming capability (analog and PWM) and extended operating temperature range (-40°C to 125°C TJ). Output current is slightly lower (1.2A vs. 1.3A). Supply voltage range is narrower (2.5V–10V vs. 4.5V–25V). Select this part when analog dimming flexibility or extended temperature operation is required and supply voltage remains within 2.5V–10V range.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message