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LM3501TL-16/NOPB LED Driver IC Equivalent & Substitute Parts
Part Overview
The LM3501TL-16/NOPB is a Texas Instruments LED Driver IC designed for step-up (boost) DC-DC regulation with 400mA switch current output. This active product operates across a 2.7V to 7V supply range and delivers a fixed 16V output, making it suitable for backlight applications requiring compact form factors. The device integrates an internal switch and operates at 1MHz frequency in an 8-DSBGA package.
Substitute parts are identified when design requirements necessitate alternative topologies, higher current capabilities, extended supply voltage ranges, or different package configurations while maintaining functional compatibility for LED driver applications.
Substiute Parts
Key Parameters
| Parameter | LM3501TL-16/NOPB |
|---|---|
| Manufacturer | Texas Instruments |
| Type | DC DC Regulator |
| Topology | Step-Up (Boost) |
| Number of Outputs | 1 |
| Voltage - Supply (Min) | 2.7V |
| Voltage - Supply (Max) | 7V |
| Voltage - Output | 16V |
| Current - Output / Channel | 400mA (Switch) |
| Frequency | 1MHz |
| Internal Switch(s) | Yes |
| Package / Case | 8-WFBGA |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C ~ 125°C (TJ) |
| Product Status | Active |
| RoHS Status | ROHS3 Compliant |
| MSL Rating | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitute parts for the LM3501TL-16/NOPB are categorized based on the following substitution criteria:
Primary Substitution Parameters:
- Topology: Step-Up (Boost) or Step-Down (Buck) or dual-mode (Buck-Boost)
- Output current capability: 270mA to 1.5A switch current
- Supply voltage range: Minimum 2.7V to 7V compatibility
- Output voltage: Fixed or adjustable 16V to 40V range
- Frequency: 150kHz to 2.5MHz operation
- Package type: Surface mount (8-DSBGA, 8-MSOP, SOT-89-5, 8-SOIC, 16-TSSOP)
- Dimming capability: Analog, PWM, or no dimming
- Operating temperature: -40°C to 85°C or -40°C to 125°C
- Compliance: ROHS3, REACH Unaffected, EAR99
Substitutes are valid when they maintain LED driver functionality within the specified electrical and thermal parameters, regardless of topology variation (boost to buck conversion is acceptable when output voltage and current requirements are met).
Parameter Comparison
| Parameter | LM3501TL-16/NOPB | LT3517EFE#PBF | IS31LT3350-V1SDLS2-TR | NCP3066DR2G | IS31LT3360-SDLS4-TR | BD6069GUT-E2 | AL8861MP-13 | MIC3202-1YME |
|---|---|---|---|---|---|---|---|---|
| Manufacturer | Texas Instruments | Analog Devices Inc. | Lumissil Microsystems | onsemi | Lumissil Microsystems | ROHM Semiconductor | Diodes Incorporated | Microchip Technology |
| 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-Down (Buck), Step-Up (Boost) | Step-Down (Buck) | Step-Down (Buck), Step-Up (Boost) | Step-Down (Buck) | Step-Up (Boost) | Step-Down (Buck) | Step-Down (Buck) |
| Number of Outputs | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Voltage - Supply (Min) | 2.7V | 3V | 6V | 3V | 6V | 2.7V | 4.5V | 6V |
| Voltage - Supply (Max) | 7V | 30V | 40V | 40V | 40V | 5.5V | 40V | 37V |
| Voltage - Output | 16V | — | — | — | 40V | 18V | 36V | — |
| Current - Output / Channel | 400mA (Switch) | 1.5A (Switch) | 650mA (Switch) | 1.5A (Switch) | 1.2A (Switch) | 270mA (Switch) | 1.5A | 1A |
| Frequency | 1MHz | 250kHz ~ 2.5MHz | 1MHz | 150kHz | 1MHz | 1MHz | 1MHz | 1MHz |
| Internal Switch(s) | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Dimming | — | Analog, PWM | Analog, PWM | Analog, PWM | Analog, PWM | — | Analog, PWM | PWM |
| Applications | Backlight | Backlight | Backlight, Lighting, Signage | Lighting | Lighting | Backlight | Backlight, Lighting, Signage | Lighting |
| Operating Temperature | -40°C ~ 125°C (TJ) | -40°C ~ 125°C (TJ) | -40°C ~ 85°C (TA) | 0°C ~ 85°C (TA) | -40°C ~ 125°C (TA) | -30°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 125°C (TJ) |
| Package / Case | 8-WFBGA | 16-TSSOP (0.173", 4.40mm Width) Exposed Pad | SOT-89-5/6 | 8-SOIC (0.154", 3.90mm Width) | SOT-89-5/6 | 8-WFBGA, CSPBGA | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad | 8-SOIC (0.154", 3.90mm Width) Exposed Pad |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Product Status | Active | Active | Active | Active | Active | Obsolete | Active | Active |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| MSL Rating | 1 (Unlimited) | 1 (Unlimited) | 3 (168 Hours) | 1 (Unlimited) | 3 (168 Hours) | 1 (Unlimited) | 1 (Unlimited) | 2 (1 Year) |
Engineering Selection Recommendations
Boost Topology Substitutes (Preferred for Direct Replacement):
BD6069GUT-E2 (ROHM Semiconductor) maintains step-up boost topology identical to the LM3501TL-16/NOPB with 2.7V minimum supply voltage and 18V fixed output. However, this part is marked obsolete and carries reduced current capability (270mA versus 400mA). Selection is limited to legacy design support only.
Buck-Boost Topology Substitutes (Extended Functionality):
LT3517EFE#PBF (Analog Devices Inc.) and NCP3066DR2G (onsemi) provide dual-mode buck-boost operation, extending supply voltage range to 3V–30V and 3V–40V respectively. Both support 1.5A switch current with programmable frequency and integrated PWM/analog dimming. LT3517EFE#PBF maintains -40°C to 125°C temperature range matching the original part. NCP3066DR2G operates at reduced frequency (150kHz) and narrower temperature range (0°C to 85°C).
Buck Topology Substitutes (Higher Current Applications):
IS31LT3350-V1SDLS2-TR and IS31LT3360-SDLS4-TR (Lumissil Microsystems) provide step-down regulation with 650mA and 1.2A capabilities respectively. IS31LT3360-SDLS4-TR includes automotive-grade qualification and -40°C to 125°C operation. Both require minimum 6V supply voltage.
AL8861MP-13 (Diodes Incorporated) delivers 1.5A buck regulation across 4.5V–40V supply range with analog and PWM dimming support. Operating temperature limited to -40°C to 85°C.
MIC3202-1YME (Microchip Technology) provides 1A buck regulation with PWM dimming across 6V–37V supply range and -40°C to 125°C operation.
Compliance and Availability:
All substitute parts maintain ROHS3 compliance, REACH unaffected status, and EAR99 classification. LT3517EFE#PBF (2,615 units), NCP3066DR2G (16,834 units), and IS31LT3350-V1SDLS2-TR (74,519 units) demonstrate active production status with adequate inventory. BD6069GUT-E2 is obsolete despite 20,384 units in stock.
Frequently Asked Questions (FAQ)
Q: Can I directly replace LM3501TL-16/NOPB with a buck topology part?
A: Direct replacement requires topology compatibility. Buck topology parts (IS31LT3350, IS31LT3360, AL8861MP-13, MIC3202-1YME) convert higher input voltages to lower outputs. They are suitable only if your application requires step-down regulation. Buck-boost parts (LT3517EFE#PBF, NCP3066DR2G) provide flexible topology selection and are preferred for applications requiring input voltage flexibility.
Q: What is the minimum supply voltage requirement for substitutes?
A: The LM3501TL-16/NOPB operates from 2.7V minimum. BD6069GUT-E2 matches this specification. LT3517EFE#PBF and NCP3066DR2G start at 3V. Buck topology parts require 4.5V to 6V minimum, making them unsuitable for sub-3V applications.
Q: Are there package compatibility considerations?
A: The original part uses 8-DSBGA (8-WFBGA) package. BD6069GUT-E2 shares this package family. Substitutes employ different packages: LT3517EFE#PBF uses 16-TSSOP, IS31LT3350/IS31LT3360 use SOT-89-5, AL8861MP-13 uses 8-MSOP, NCP3066DR2G and MIC3202-1YME use 8-SOIC. PCB layout redesign is required for non-BGA substitutes.
Q: Which substitute supports the widest supply voltage range?
A: NCP3066DR2G and AL8861MP-13 both support 3V–40V and 4.5V–40V ranges respectively, providing maximum flexibility for multi-voltage applications. LT3517EFE#PBF extends to 30V maximum.
Q: What is the temperature rating difference between substitutes?
A: The LM3501TL-16/NOPB operates -40°C to 125°C (junction). LT3517EFE#PBF and IS31LT3360-SDLS4-TR and MIC3202-1YME match this range. IS31LT3350-V1SDLS2-TR, AL8861MP-13, and NCP3066DR2G are limited to -40°C to 85°C or 0°C to 85°C, unsuitable for extended temperature applications.
Q: Does BD6069GUT-E2 remain a viable option?
A: BD6069GUT-E2 is marked obsolete. While 20,384 units remain in inventory, long-term availability is not guaranteed. Active alternatives (LT3517EFE#PBF, NCP3066DR2G, IS31LT3350-V1SDLS2-TR) are recommended for new designs.
Q: Which substitute offers the closest current rating match?
A: The LM3501TL-16/NOPB provides 400mA switch current. IS31LT3350-V1SDLS2-TR (650mA) and IS31LT3360-SDLS4-TR (1.2A) exceed this rating. BD6069GUT-E2 (270mA) falls below. LT3517EFE#PBF and NCP3066DR2G (1.5A each) and AL8861MP-13 (1.5A) provide higher current capability for demanding applications.
Q: What dimming capabilities do substitutes provide?
A: The LM3501TL-16/NOPB has no integrated dimming. LT3517EFE#PBF, NCP3066DR2G, IS31LT3350-V1SDLS2-TR, IS31LT3360-SDLS4-TR, and AL8861MP-13 support analog and PWM dimming. MIC3202-1YME supports PWM dimming only. BD6069GUT-E2 has no dimming capability.
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