LM2735XQMF/NOPB Texas Instruments Integrated Circuit (SOT23 (5-Pin)) In Stock
The LM2735XQMF/NOPB is a current-mode PWM boost and SEPIC DC-DC regulator from Texas Instruments in a 5-pin SOT-23 package. It operates from 2.7V to 5.5V input at 520 kHz or 1.6 MHz, with adjustable output from 3V to 24V. Available lead-free with worldwide in-stock shipping.
- Manufacturer
- Texas Instruments
- Package
- SOT23 (5-Pin)
- Pin Count
- 5
- Lifecycle
- ACTIVE
- Datasheet
- LM2735XQMF/NOPB Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $1.3400(MOQ 500)
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LM2735XQMF/NOPB?
- Selectable 520 kHz or 1.6 MHz switching frequency allowing inductor size versus EMI trade-off optimization
- Supports both boost and SEPIC topologies from the same SOT-23-5 package for flexible output voltage design
- Adjustable output voltage from 3V to 24V covering a wide range of system rail requirements
- 2.7V to 5.5V input range enabling single Li-ion cell or USB 5V powered battery boost applications
- Current-mode PWM control providing inherent cycle-by-cycle current limiting and fast transient response
What is LM2735XQMF/NOPB used for?
The LM2735XQMF/NOPB is suited for portable electronics and IoT nodes where a 3.3V or 5V battery must be boosted to 12V or 24V for sensor biasing, white LED drive strings, or small display backlights. SEPIC mode operation allows the output to be set equal to, above, or below the input voltage, making it useful for applications where input voltage varies across the battery discharge curve from 4.2V to 2.7V. The tiny SOT-23-5 package and 1.6 MHz switching frequency keep external passive components small enough for wearable and medical device PCBs.
What are the specifications of LM2735XQMF/NOPB?
| Pbfree Code | Yes |
| YTEOL | 15 |
| Additional Feature | ALSO OPERATES IN ADJUSTABLE MODE FROM 3V TO 24V |
| Analog IC - Other Type | SWITCHING REGULATOR |
| Control Mode | CURRENT-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 5.5V |
| Input Voltage-Min | 2.7V |
| Input Voltage-Nom | 5V |
| JESD-30 Code | R-PDSO-G5 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Output Voltage-Max | 24V |
| Output Voltage-Min | 3V |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, LOW PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Screening Level | AEC-Q100 |
| Surface Mount | YES |
| Switcher Configuration | BOOST |
| Switching Frequency-Max | 1600kHz |
| Technology | BICMOS |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.95mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | SOT23 (5-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
Where can I find the LM2735XQMF/NOPB datasheet?
LM2735XQMF/NOPB Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for LM2735XQMF/NOPB?
Compatible alternatives and drop-in replacements for LM2735XQMF/NOPB:
Switching Regulator, Voltage-mode, 3A, 1600kHz Switching Freq-Max, PDSO5
Switching Regulator, Voltage-mode, 3A, 2000kHz Switching Freq-Max, PDSO5
Frequently Asked Questions
How does selecting 1.6 MHz versus 520 kHz on LM2735XQMF/NOPB affect the external inductor size?
At 1.6 MHz, the required inductor value drops to approximately 2.2 µH to 4.7 µH, while 520 kHz operation needs 10 µH to 22 µH for the same power level. The smaller 1.6 MHz inductor fits in a 1.6 x 0.8 mm package versus a 3.2 x 2.5 mm part at 520 kHz, significantly reducing the total converter footprint at the cost of slightly higher switching losses.
What is the output voltage range of LM2735XQMF/NOPB and how is it programmed?
The adjustable output covers 3V to 24V, set by a resistor divider from the output to the feedback pin targeting 1.23V reference. Selecting 47 kohm and 5.6 kohm resistors programs approximately 12V output. This flexibility allows a single part to serve 5V USB boosts, 12V sensor supplies, and 24V piezo driver rails across different product variants.
For a medical wearable design, why does LM2735XQMF/NOPB's SEPIC topology offer an advantage over a pure boost converter?
SEPIC topology allows the output to equal, exceed, or fall below the input voltage, which is critical when a Li-ion cell discharges from 4.2V to 2.7V and the required output is 3.3V. A pure boost cannot produce an output below its input, so it would fail when the cell is nearly full. SEPIC maintains 3.3V output across the full 2.7V to 4.2V discharge range, maximizing usable battery capacity in medical wearables where size and runtime are both constrained.
How does current-mode PWM control in LM2735XQMF/NOPB help protect downstream components during startup or short-circuit events?
Current-mode control samples inductor current every switching cycle at 520 kHz or 1.6 MHz, clamping the peak switch current below an internal 600 mA to 900 mA threshold before the duty cycle can expand further. This cycle-by-cycle limiting prevents inductor saturation and protects the 5-pin SOT-23 package from thermal overload during output short circuits, improving system reliability without requiring a separate current-sense IC.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
More from Texas Instruments
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 500+ | $1.5100 | $755.00 |
| 1000+ | $1.4300 | $1430.00 |
| 10000+ | $1.3400 | $13400.00 |
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