Request Quote
(Ships tomorrow)
LP3952RLX/NOPB LED Driver IC Equivalent & Substitute Parts
Part Overview
The LP3952RLX/NOPB is a 6-output LED driver IC with integrated DC-DC step-up (boost) regulator designed for backlight applications. Manufactured by Texas Instruments, this device operates from 3V to 5.5V input and delivers 5.3V output at 40mA per channel with PWM dimming control in a 36-DSBGA package. The product is currently obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity.
Substiute Parts
Key Parameters
| Parameter | LP3952RLX/NOPB |
|---|---|
| Manufacturer | Texas Instruments |
| Product Status | Obsolete |
| Type | DC DC Regulator |
| Topology | Step-Up (Boost) |
| Number of Outputs | 6 |
| Voltage - Supply (Min) | 3V |
| Voltage - Supply (Max) | 5.5V |
| Voltage - Output | 5.3V |
| Current - Output / Channel | 40mA |
| Frequency | 2MHz |
| Dimming | PWM |
| Package / Case | 36-WFBGA, DSBGA |
| Operating Temperature | -30°C ~ 85°C (TA) |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution for the LP3952RLX/NOPB is determined by the following critical parameters:
- Topology: Step-Up (Boost) regulator required
- Number of Outputs: 6 channels
- Dimming Control: PWM capability
- Supply Voltage Range: Minimum 3V input support
- Output Current: 40mA per channel or higher
- Package Type: Surface mount with thermal management capability
- Compliance: ROHS3 compliance and EAR99 classification
Substitute parts are grouped into two categories: parametric equivalents (direct functional replacements with identical electrical specifications) and manufacturer-recommended alternatives (functionally compatible with allowable parameter variations within the application envelope).
Parameter Comparison
| Parameter | LP3952RLX/NOPB | LP3952RL/NOPB | ISL97672BIRZ-T | LED7706TR | LT3598IUF#TRPBF | MIC3263YML-TR | MP3366GC-P | MPQ3386DR-LF-Z | MPQ3387LGRT-AEC1-P |
|---|---|---|---|---|---|---|---|---|---|
| Manufacturer | Texas Instruments | National Semiconductor | Renesas Electronics | STMicroelectronics | Analog Devices Inc. | Microchip Technology | Monolithic Power Systems Inc. | Monolithic Power Systems | Monolithic Power Systems Inc. |
| Product Status | Obsolete | Active | Active | Active | Active | Active | Active | Active | Active |
| 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 | DC DC Regulator |
| Topology | Step-Up (Boost) | Step-Up (Boost) | Step-Up (Boost) | Step-Up (Boost) | Step-Up (Boost) | Step-Up (Boost) | Step-Up (Boost) | Step-Up (Boost) | Step-Up (Boost) |
| Number of Outputs | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 |
| Voltage - Supply (Min) | 3V | 3V | 4.5V | 4.5V | 3V | 6V | 3V | 4.5V | 3V |
| Voltage - Supply (Max) | 5.5V | 5.5V | 26.5V | 36V | 30V | 40V | 25V | 25V | 25V |
| Voltage - Output | 5.3V | 5.3V | 45V | 36V | 44V | - | 45V | 50V | 45V |
| Current - Output / Channel | 40mA | 40mA | 50mA | 30mA | 30mA | 30mA | 45mA | - | 45mA |
| Frequency | 2MHz | 2MHz | 200kHz ~ 1.5MHz | 250kHz ~ 1MHz | 200kHz ~ 2.5MHz | 1.2MHz | 600kHz | 1.25MHz | 24kHz ~ 27.5kHz |
| Dimming | PWM | PWM | PWM | PWM | Analog, PWM | PWM | Analog, PWM | PWM | Analog, PWM |
| Package / Case | 36-WFBGA, DSBGA | 36-WFBGA, DSBGA | 20-VFQFN Exposed Pad | 24-VFQFN Exposed Pad | 24-WFQFN Exposed Pad | 24-VFQFN Exposed Pad, 24-MLF® | 18-UFBGA, WLCSP | 24-VFQFN Exposed Pad | 24-WFQFN Exposed Pad |
| Operating Temperature | -30°C ~ 85°C (TA) | -30°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 150°C (TJ) | -40°C ~ 125°C (TJ) | -40°C ~ 125°C (TJ) | -40°C ~ 125°C (TJ) | -40°C ~ 125°C (TJ) | - |
| RoHS Status | ROHS3 Compliant | - | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| MSL Rating | 1 (Unlimited) | - | 3 (168 Hours) | 3 (168 Hours) | 1 (Unlimited) | 2 (1 Year) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
Engineering Selection Recommendations
Parametric Equivalent (Direct Replacement)
LP3952RL/NOPB is the parametric equivalent with identical electrical specifications and operating characteristics. This part maintains the same 3V to 5.5V supply range, 5.3V output, 40mA per channel current, and 2MHz switching frequency. Product status is active, ensuring long-term availability. This is the preferred choice for direct substitution in existing designs.
Manufacturer-Recommended Alternatives
The following parts are manufacturer-recommended substitutes with functional compatibility within the application envelope:
ISL97672BIRZ-T (Renesas) provides higher output current (50mA) and extended supply voltage range (4.5V to 26.5V) with active product status. Package change to 20-QFN requires PCB layout modification.
LED7706TR (STMicroelectronics) offers extended operating temperature range (-40°C to 150°C) and higher maximum supply voltage (36V). Output current is 30mA per channel. Package is 24-VFQFPN, requiring layout redesign.
LT3598IUF#TRPBF (Analog Devices) supports both analog and PWM dimming with extended supply voltage (3V to 30V) and higher output voltage (44V). MSL rating is 1 (Unlimited), providing superior moisture handling. Package is 24-QFN.
MIC3263YML-TR (Microchip) operates from 6V to 40V with 30mA per channel output. MSL rating is 2 (1 Year). Package is 24-MLF or 24-VFQFN.
MP3366GC-P (Monolithic Power Systems) provides 45mA per channel with analog and PWM dimming capability. Supply range is 3V to 25V. Package is 18-WLCSP with MSL rating 1 (Unlimited).
MPQ3386DR-LF-Z (Monolithic Power Systems) includes automotive qualification (AEC-Q100) with 1.25MHz switching frequency and 50V output capability. Package is 24-QFN.
MPQ3387LGRT-AEC1-P (Monolithic Power Systems) is automotive-qualified (AEC-Q100) with 45mA per channel, analog and PWM dimming, and 3V to 25V supply range. Package is 24-TQFN.
All substitute parts maintain ROHS3 compliance and EAR99 classification. Selection depends on specific application requirements for supply voltage range, output current, operating temperature, dimming control method, and package constraints.
Frequently Asked Questions (FAQ)
Q: Can LP3952RL/NOPB be used as a direct replacement for LP3952RLX/NOPB?
A: Yes. LP3952RL/NOPB is a parametric equivalent with identical electrical specifications, operating voltage range (3V to 5.5V), output voltage (5.3V), per-channel current (40mA), switching frequency (2MHz), and PWM dimming control. The primary difference is packaging designation and product status (active vs. obsolete). No design changes are required.
Q: What are the key differences between the parametric equivalent and manufacturer-recommended alternatives?
A: The parametric equivalent (LP3952RL/NOPB) maintains identical electrical performance. Manufacturer-recommended alternatives offer extended capabilities such as higher output current (50mA vs. 40mA), wider supply voltage ranges (up to 40V vs. 5.5V), higher output voltages (36V to 50V vs. 5.3V), extended temperature ranges, or additional dimming modes (analog + PWM vs. PWM only). These alternatives require application-level evaluation to confirm compatibility.
Q: Do package changes require PCB redesign?
A: Yes. The original LP3952RLX/NOPB uses 36-DSBGA packaging. Substitute parts use different packages: 20-QFN, 24-VFQFPN, 24-QFN, 24-MLF, 18-WLCSP, or 24-TQFN. Each package has different pin assignments, thermal characteristics, and footprint dimensions. PCB layout redesign is mandatory for any package change.
Q: Are all substitute parts ROHS3 compliant?
A: Yes. All listed substitute parts are ROHS3 compliant and carry EAR99 export classification, matching the compliance profile of the original LP3952RLX/NOPB.
Q: What is the significance of MSL (Moisture Sensitivity Level) ratings?
A: MSL rating indicates moisture sensitivity during storage and handling. MSL 1 (Unlimited) allows indefinite storage without baking. MSL 2 (1 Year) requires baking if stored beyond one year. MSL 3 (168 Hours) requires baking if stored beyond 168 hours. LP3952RLX/NOPB and several substitutes (LT3598IUF#TRPBF, MP3366GC-P, MPQ3386DR-LF-Z, MPQ3387LGRT-AEC1-P) have MSL 1 rating, providing maximum handling flexibility.
Q: Which substitutes support extended temperature operation?
A: LED7706TR operates from -40°C to 150°C (junction temperature), providing the widest temperature range. LT3598IUF#TRPBF, MIC3263YML-TR, MP3366GC-P, MPQ3386DR-LF-Z, and MPQ3387LGRT-AEC1-P all support -40°C to 125°C operation, compared to the original part's -30°C to 85°C range.
Q: Are automotive-qualified versions available?
A: Yes. MPQ3386DR-LF-Z and MPQ3387LGRT-AEC1-P are both AEC-Q100 qualified for automotive applications. These parts are suitable for designs requiring automotive-grade reliability and qualification documentation.
Q: What dimming control options are available across substitutes?
A: The original LP3952RLX/NOPB supports PWM dimming only. Substitutes offering both analog and PWM dimming include LT3598IUF#TRPBF, MP3366GC-P, and MPQ3387LGRT-AEC1-P. These provide additional flexibility for dimming implementation in the application circuit.
Alternative Parts
SJ6012L2TP
Littelfuse Inc.
6 Alternative Parts
JMK107BBJ476MA-RE
Taiyo Yuden
10 Alternative Parts
GMK107BBJ475MA-T
Taiyo Yuden
5 Alternative Parts
SJ6020N2ARP
Littelfuse Inc.
3 Alternative Parts
SJ6025R2ATP
Littelfuse Inc.
4 Alternative Parts
2474-05L
API Delevan Inc.
1 Alternative Parts
4590R-684K
API Delevan Inc.
1 Alternative Parts
CM6560R-334
API Delevan Inc.
1 Alternative Parts
CM6460-104
API Delevan Inc.
1 Alternative Parts
5526-12
API Delevan Inc.
1 Alternative Parts