TPS61176RTER LED Driver IC Equivalent & Substitute Parts

Part Overview

The TPS61176RTER is an active LED driver IC manufactured by Texas Instruments, classified as a Power Management PMIC. This device functions as a 6-output DC-DC step-up (boost) regulator with integrated PWM and analog dimming capabilities, designed for backlight applications. The part operates with a 35mA output current per channel and supports input voltages from 2.7V to 6.5V, delivering up to 38V output. With active product status and full RoHS3 compliance, the TPS61176RTER remains in production with substantial inventory availability. Equivalent and substitute parts are identified when design requirements necessitate alternative electrical specifications, packaging formats, or supply chain considerations while maintaining functional compatibility within LED driver applications.

Substiute Parts

TPS61176RTER

Texas InstrumentsIn Stock: 6248TPS61176RTER Datasheet

Current PartRFQ

ALED7707TR

STMicroelectronicsIn Stock: 33404ALED7707TR Datasheet

MFR RecommendedRFQ

ISL78171ARZ-T7A

Renesas Electronics CorporationIn Stock: 1249ISL78171ARZ-T7A Datasheet

MFR RecommendedRFQ

ISL97671AIRZ-T

Renesas Electronics CorporationIn Stock: 8100ISL97671AIRZ-T Datasheet

MFR RecommendedRFQ

LT3598EUF#TRPBF

Analog Devices Inc.In Stock: 1410LT3598EUF#TRPBF Datasheet

MFR RecommendedRFQ

MP3387LGRT-P

Monolithic Power SystemsIn Stock: 1490MP3387LGRT-P Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TPS61176RTER are qualified based on the following electrical and mechanical criteria:

Primary Substitution Parameters:

• Topology: Step-Up (Boost) DC-DC regulator
• Number of Outputs: 6 channels
• Dimming Support: Analog and/or PWM capability
• Application: LED backlight driver
• Internal Switch: Integrated switching element
• Surface Mount: Compatible mounting technology

Acceptable Variation Ranges:

• Input Voltage Range: Minimum 2.7V to 6.5V (substitutes may exceed this range)
• Output Voltage: 36V to 45V (functional overlap with TPS61176RTER 38V output)
• Output Current per Channel: 30mA to 85mA (substitutes may provide higher current capability)
• Operating Frequency: 200kHz to 2.5MHz (includes 1MHz baseline)
• Package Format: QFN variants with exposed pad (16-WQFN to 24-QFN acceptable)
• Operating Temperature: -40°C minimum to 85°C or higher maximum
• Compliance: RoHS3 compliant, REACH unaffected

Five manufacturer-recommended substitute parts meet these criteria while maintaining functional equivalence for LED driver applications.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts maintain active product status with full RoHS3 compliance and REACH unaffected designation, ensuring regulatory alignment with the TPS61176RTER baseline.

ALED7707TR (STMicroelectronics): Provides highest output current capability at 85mA per channel with extended input voltage range (4.5V to 36V). Includes automotive-grade qualification (AEC-Q100) and elevated operating temperature to 150°C. Package footprint increases to 24-QFN (5x5). MSL rating of 3 requires controlled moisture exposure during assembly. Suitable for high-current backlight applications with automotive requirements.

ISL78171ARZ-T7A (Renesas Electronics): Offers 50mA output current with dual dimming control via analog, I2C, and PWM interfaces. Automotive-grade qualification (AEC-Q100) with operating temperature to 105°C. Input voltage range 4.5V to 26.5V with 40V output capability. MSL rating of 1 provides unlimited moisture tolerance. 20-QFN (3x4) package reduces footprint compared to TPS61176RTER. Suitable for automotive backlight systems requiring digital control integration.

ISL97671AIRZ-T (Renesas Electronics): Delivers 50mA output current with PWM dimming and highest output voltage at 45V. Operating frequency range 600kHz to 1.14MHz. Input voltage 4.5V to 26.5V. Operating temperature matches TPS61176RTER at -40°C to 85°C. MSL rating of 3 requires moisture control. 20-QFN (3x4) package. Suitable for applications requiring maximum output voltage with compact footprint.

LT3598EUF#TRPBF (Analog Devices Inc.): Supports widest frequency range (200kHz to 2.5MHz) with 30mA output current and 44V output voltage. Analog and PWM dimming with extended operating temperature to 125°C. Input voltage 3V to 30V provides lowest minimum supply voltage. MSL rating of 1 and 24-QFN (4x4) package. Suitable for flexible frequency applications with low-voltage input requirements.

MP3387LGRT-P (Monolithic Power Systems): Provides 45mA output current with analog and PWM dimming at 1.25MHz frequency. Input voltage 3V to 25V with operating temperature to 125°C. MSL rating of 1 and 24-TQFN (4x4) package. Output voltage not specified in datasheet. Suitable for standard backlight applications with flexible input voltage requirements.

Frequently Asked Questions (FAQ)

Q: Can the TPS61176RTER be directly replaced with any of these substitute parts without circuit modification?

A: Direct pin-for-pin replacement is not guaranteed due to package differences. The TPS61176RTER uses 16-WQFN (3x3) while substitutes range from 20-QFN to 24-QFN packages. PCB layout redesign is required. Electrical functionality remains compatible within the specified parameter ranges for boost topology, 6-output configuration, and dimming capability.

Q: Which substitute part has the lowest minimum input voltage requirement?

A: Both LT3598EUF#TRPBF and MP3387LGRT-P support 3V minimum input voltage, compared to TPS61176RTER at 2.7V. These parts provide the widest input voltage flexibility for low-battery applications.

Q: What is the significance of MSL (Moisture Sensitivity Level) ratings in the comparison?

A: MSL rating indicates moisture exposure tolerance during storage and assembly. MSL 1 (unlimited) allows indefinite storage without desiccant. MSL 3 (168 hours) requires controlled humidity storage and limits exposure time. ALED7707TR and ISL97671AIRZ-T with MSL 3 require moisture control procedures during manufacturing. TPS61176RTER, ISL78171ARZ-T7A, LT3598EUF#TRPBF, and MP3387LGRT-P with MSL 1 offer simplified handling.

Q: Which substitute provides automotive qualification?

A: ALED7707TR and ISL78171ARZ-T7A both carry AEC-Q100 automotive qualification. These parts are suitable for automotive backlight systems requiring industry-standard reliability certification. Other substitutes lack explicit automotive qualification.

Q: How do output current capabilities affect substitution decisions?

A: TPS61176RTER provides 35mA per channel. ALED7707TR offers 85mA (2.4x higher), ISL78171ARZ-T7A and ISL97671AIRZ-T provide 50mA (1.4x higher), MP3387LGRT-P provides 45mA (1.3x higher), and LT3598EUF#TRPBF provides 30mA (lower). Higher current capability allows driving brighter LED arrays or more channels. Lower current requires reduced LED brightness or fewer parallel strings.

Q: What package considerations apply when selecting a substitute?

A: TPS61176RTER uses compact 16-WQFN (3x3) requiring minimal PCB area. All substitutes use larger packages: 20-QFN (3x4) for Renesas parts, 24-QFN (5x5) for STMicroelectronics, and 24-QFN (4x4) for Analog Devices and Monolithic Power Systems. Larger packages increase thermal dissipation capability but require expanded PCB footprint. Design space availability determines package compatibility.

Q: Which substitute supports the widest operating temperature range?

A: ALED7707TR extends to 150°C (junction temperature), followed by LT3598EUF#TRPBF and MP3387LGRT-P at 125°C. ISL78171ARZ-T7A reaches 105°C. TPS61176RTER and ISL97671AIRZ-T both specify 85°C. Higher temperature ratings enable operation in thermally demanding environments.

Q: Are all substitutes compatible with both analog and PWM dimming?

A: TPS61176RTER, LT3598EUF#TRPBF, and MP3387LGRT-P support both analog and PWM dimming. ALED7707TR and ISL97671AIRZ-T support PWM only. ISL78171ARZ-T7A adds I2C digital control alongside analog and PWM. Dimming method selection depends on application control architecture requirements.