LM2735YQMF Texas Instruments Integrated Circuit (SOT23 (5-Pin)) In Stock
LM2735YQMF is a current-mode PWM SEPIC DC-DC switching regulator by Texas Instruments with adjustable output. Key specs: 2.7 V to 5.5 V input, 3 V to 24 V adjustable output, 5-pin SOT-23 package. From $1.80, in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- SOT23 (5-Pin)
- Pin Count
- 5
- Lifecycle
- OBSOLETE
- Datasheet
- LM2735YQMF Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- SEPIC topology with 2.7 V to 5.5 V input and 3 V to 24 V adjustable output, enabling both step-up and step-down conversion from a single-cell Li-ion supply
- Current-mode PWM control provides inherent cycle-by-cycle current limiting and fast line/load transient response without secondary compensation loops
- Compact 5-pin SOT-23 package allows single-layer PCB routing with minimal external components for high-voltage output LED driver and boost applications
Applications
LM2735YQMF is suited for LED backlight drivers, white LED boost converters, and battery-powered instruments that need to generate a 12 V or 24 V rail from a 3.3 V or 5 V input supply. Its SEPIC topology allows the output voltage to be higher or lower than the input, making it flexible for applications where the input rail varies with battery state of charge. The 5-pin SOT-23 package keeps the solution footprint under 15 mm² including the external inductor and diode.
Specifications
| Pbfree Code | No |
| YTEOL | 0 |
| 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 | e0 |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSOP5/6,.11,37 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Surface Mount | YES |
| Switcher Configuration | BOOST |
| Switching Frequency-Max | 680kHz |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | TIN LEAD |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.95mm |
| Terminal Position | DUAL |
| Package | SOT23 (5-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for LM2735YQMF:
Rochester Electronics LLC 3A SWITCHING REGULATOR, 680kHz SWITCHING FREQ-MAX, PDSO5, SOT-23, 5 PIN
Switching Regulator, Voltage-mode, 3A, 680kHz Switching Freq-Max, PDSO5
Frequently Asked Questions
What output voltage range can LM2735YQMF achieve from a 3.7 V Li-ion battery?
LM2735YQMF supports an adjustable output from 3 V to 24 V when the input is between 2.7 V and 5.5 V, so from a 3.7 V Li-ion cell it can generate rails from 3 V (pass-through buck mode) up to 24 V for LED strings or analog front-ends. The output is set with a resistor divider on the feedback pin.
How does the SEPIC topology of LM2735YQMF differ from a standard boost converter for battery-powered LED drivers?
Unlike a boost converter that can only step voltage up, the SEPIC topology of LM2735YQMF can step voltage both up and down, maintaining a regulated 12 V output whether the battery is at full charge (4.2 V) or nearly depleted (2.7 V). This extends usable LED brightness over the full battery discharge cycle and prevents the output from collapsing when input approaches the output voltage—a common boost converter limitation.
What switching frequency does LM2735YQMF use, and how does current-mode control help in overcurrent protection?
LM2735YQMF operates at a fixed 520 kHz switching frequency, allowing the use of a 4.7 µH to 10 µH coupled or discrete inductor. Current-mode PWM control measures the peak inductor current each switching cycle and limits it on a cycle-by-cycle basis, protecting against output short-circuit faults without a separate overcurrent sense resistor or additional protection circuitry.
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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.
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