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LM2735YMF Equivalent & Substitute Parts
Part Overview
The LM2735YMF is a multi-configuration switching regulator IC from Texas Instruments designed for boost, flyback, and SEPIC topologies. It delivers adjustable positive output voltage from 3V to 24V with 2.1A switch current capability in a compact SC-74A (SOT-753) surface mount package. The device operates across an input voltage range of 2.7V to 5.5V with a fixed switching frequency of 520kHz.
The LM2735YMF is classified as obsolete. Locating direct equivalents or suitable substitutes is necessary for new designs, production continuity, and long-term component availability assurance.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Category | Power Management (PMIC) |
| Function | Step-Up, Step-Up/Step-Down |
| Topology | Boost, Flyback, SEPIC |
| Output Configuration | Positive |
| Output Type | Adjustable |
| Number of Outputs | 1 |
| Voltage - Input (Min) | 2.7V |
| Voltage - Input (Max) | 5.5V |
| Voltage - Output (Min/Fixed) | 3V |
| Voltage - Output (Max) | 24V |
| Current - Output | 2.1A (Switch) |
| Frequency - Switching | 520kHz |
| Synchronous Rectifier | No |
| Operating Temperature | -40°C ~ 125°C (TJ) |
| Mounting Type | Surface Mount |
| Package / Case | SC-74A, SOT-753 |
| Supplier Device Package | SOT-23-5 |
Substitute Part Grouping Explanation
Substitution eligibility for the LM2735YMF is determined by strict equivalence across the following critical parameters:
- Topology & Function: Boost, Flyback, SEPIC switching regulator with Step-Up and Step-Up/Step-Down capability
- Output Configuration: Single positive adjustable output
- Voltage Specifications: Input range 2.7V–5.5V; output range 3V–24V
- Current Rating: 2.1A switch current
- Switching Frequency: 520kHz
- Package: SC-74A (SOT-753) / SOT-23-5
- Operating Temperature Range: -40°C to 125°C (TJ)
- Synchronous Rectifier: Not present
The LM2735YMF/NOPB is a direct manufacturer equivalent that maintains identical electrical and mechanical specifications while offering improved product status and compliance certifications.
Parameter Comparison
| Parameter | LM2735YMF | LM2735YMF/NOPB |
|---|---|---|
| Manufacturer | Texas Instruments | Texas Instruments |
| Product Status | Obsolete | Active |
| Function | Step-Up, Step-Up/Step-Down | Step-Up, Step-Up/Step-Down |
| Topology | Boost, Flyback, SEPIC | Boost, Flyback, SEPIC |
| Output Configuration | Positive | Positive |
| Output Type | Adjustable | Adjustable |
| Number of Outputs | 1 | 1 |
| Voltage - Input (Min) | 2.7V | 2.7V |
| Voltage - Input (Max) | 5.5V | 5.5V |
| Voltage - Output (Min/Fixed) | 3V | 3V |
| Voltage - Output (Max) | 24V | 24V |
| Current - Output | 2.1A (Switch) | 2.1A (Switch) |
| Frequency - Switching | 520kHz | 520kHz |
| Synchronous Rectifier | No | No |
| Operating Temperature | -40°C ~ 125°C (TJ) | -40°C ~ 125°C (TJ) |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | SC-74A, SOT-753 | SC-74A, SOT-753 |
| Supplier Device Package | SOT-23-5 | SOT-23-5 |
| RoHS Status | RoHS non-compliant | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) |
| REACH Status | REACH Unaffected | REACH Unaffected |
Engineering Selection Recommendations
The LM2735YMF/NOPB is the direct substitute for the obsolete LM2735YMF. Both parts are electrically and mechanically identical across all specified parameters. The primary distinction is product status and regulatory compliance:
- LM2735YMF: Obsolete status with RoHS non-compliant classification
- LM2735YMF/NOPB: Active product status with ROHS3 compliance
For new designs and production applications, the LM2735YMF/NOPB is the appropriate selection. It maintains full pin-for-pin and functional compatibility while offering superior long-term availability and compliance with current environmental regulations.
Frequently Asked Questions (FAQ)
Q: Can LM2735YMF/NOPB be used as a direct replacement for LM2735YMF?
A: Yes. The LM2735YMF/NOPB is a direct equivalent with identical electrical specifications, output voltage range (3V–24V), switch current (2.1A), switching frequency (520kHz), and SC-74A package. Pin configuration and functional behavior are unchanged.
Q: What is the difference between LM2735YMF and LM2735YMF/NOPB?
A: The primary differences are product status and compliance. LM2735YMF is obsolete and RoHS non-compliant. LM2735YMF/NOPB is an active product with ROHS3 compliance. All electrical and mechanical parameters are identical.
Q: Are there any package or pinout differences?
A: No. Both parts use the SC-74A (SOT-753) surface mount package with SOT-23-5 supplier device package designation. Pinout and PCB footprint are identical.
Q: What topologies does this regulator support?
A: The LM2735YMF and LM2735YMF/NOPB support boost, flyback, and SEPIC switching regulator topologies with step-up and step-up/step-down functionality.
Q: What is the input voltage operating range?
A: The input voltage range is 2.7V to 5.5V. Output voltage is adjustable from 3V to 24V.
Q: Is a synchronous rectifier included?
A: No. Both the LM2735YMF and LM2735YMF/NOPB do not include an integrated synchronous rectifier.
Q: What is the operating temperature range?
A: Both parts operate from -40°C to 125°C junction temperature (TJ).
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