LM3754SQ Texas Instruments Integrated Circuit (Other) In Stock
Scalable 2-phase synchronous buck controller with voltage-mode PWM, supporting input voltages from 4.5 V to 18 V with a 12 V nominal rail. Housed in a 32-pin XQCC package for compact high-current power designs. Available from Texas Instruments with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Other
- Pin Count
- 32
- Lifecycle
- OBSOLETE
- Datasheet
- LM3754SQ Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -5.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LM3754SQ?
- 2-phase interleaved voltage-mode PWM control reducing input and output ripple at 4.5 V to 18 V input
- Scalable architecture allowing multiple LM3754SQ devices to be paralleled for higher phase count
- Wide 4.5 V to 18 V input range covering 5 V, 12 V, and 15 V bus rails in server and telecom power systems
- 32-pin XQCC QFN-style package enabling dense layout for high-current point-of-load converters
What is LM3754SQ used for?
The LM3754SQ is designed for high-current point-of-load DC-DC converters in servers, networking switches, and telecom infrastructure where a 12 V bus must be stepped down to sub-1 V processor core voltages. Its scalable 2-phase architecture reduces output capacitor requirements and allows paralleling for multi-phase designs supplying tens of amperes to modern CPUs, FPGAs, and ASICs.
What are the specifications of LM3754SQ?
| YTEOL | 0 |
| Analog IC - Other Type | SWITCHING CONTROLLER |
| Control Mode | VOLTAGE-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 18V |
| Input Voltage-Min | 4.5V |
| Input Voltage-Nom | 12V |
| JESD-30 Code | S-XQCC-N32 |
| JESD-609 Code | e0 |
| Number of Functions | 1 |
| Output Voltage-Max | 3.6V |
| Output Voltage-Min | 0.6V |
| Package Body Material | UNSPECIFIED |
| Package Shape | SQUARE |
| Package Style | CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Current-Max (Isup) | 20mA |
| Surface Mount | YES |
| Switcher Configuration | PUSH-PULL |
| Switching Frequency-Max | 1000kHz |
| Technology | BICMOS |
| Terminal Finish | Tin/Lead (Sn85Pb15) |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.5mm |
| Terminal Position | QUAD |
| Time@Peak Reflow Temperature-Max (s) | 40 |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Where can I find the LM3754SQ datasheet?
LM3754SQ Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for LM3754SQ?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What input voltage range does the LM3754SQ support for server power designs?
The LM3754SQ accepts input voltages from 4.5 V to 18 V, with a 12 V nominal operating point, covering standard server intermediate bus voltages. This range enables direct conversion from a 12 V bus to sub-1 V processor core rails without an additional pre-regulator stage.
How does the 2-phase interleaved operation of the LM3754SQ reduce output ripple?
By operating 2 phases 180° out of phase, the LM3754SQ effectively doubles the ripple frequency seen by the output capacitors, reducing peak-to-peak output voltage ripple and allowing smaller output capacitor values. In a 12 V to 1.0 V conversion at 300 kHz per phase, ripple frequency at the output becomes 600 kHz, cutting capacitor count by 30% to 50%.
Can multiple LM3754SQ devices be paralleled to support higher output current loads?
Yes, the LM3754SQ is designed with a scalable architecture that allows multiple controllers to be synchronized and operated together, extending the phase count to 4, 6, or more phases for high-current loads exceeding 100 A. This scalability is particularly valuable in CPU and FPGA VR designs where core voltages below 1.0 V require tightly regulated current sharing.
What package does the LM3754SQ use and how does it affect thermal management in dense layouts?
The LM3754SQ is housed in a 32-pin XQCC (QFN-style) package with an exposed thermal pad, enabling efficient heat dissipation into the PCB ground plane at power densities typical of 20 A to 50 A buck converter designs. The compact package also keeps control loop routing short, improving noise immunity at switching frequencies up to several hundred kilohertz.
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Why Buy from FindMyChip
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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