LM2677SD-3.3/NOPB Texas Instruments Integrated Circuit (Small Outline No-lead) In Stock
Texas Instruments LM2677SD-3.3/NOPB is a fixed 3.3 V, 5 A PWM buck switching regulator operating from 8 V to 40 V input in a 14-pin VDFN exposed-pad package. Voltage-mode PWM control provides stable regulation across varying load conditions at a nominal 12 V bus. Available from stock worldwide with Pb-free, RoHS-compliant construction.
- Manufacturer
- Texas Instruments
- Package
- Small Outline No-lead
- Pin Count
- 14
- Lifecycle
- ACTIVE
- Datasheet
- LM2677SD-3.3/NOPB Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $3.2400(MOQ 250)
- 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 LM2677SD-3.3/NOPB?
- Fixed 3.3 V output at up to 5 A load current for powering FPGAs, DSPs, and logic rails from a 12 V bus
- 8 V to 40 V wide input range accommodating 12 V, 24 V, and automotive input bus variations
- Voltage-mode PWM control enabling predictable loop stability with straightforward external compensation
- 14-pin VDFN exposed-pad package with low thermal resistance for efficient heat dissipation at 5 A output
- Pb-free and RoHS-compliant per JEDEC e3 classification for modern lead-free PCB assembly
What is LM2677SD-3.3/NOPB used for?
The LM2677SD-3.3/NOPB is designed for industrial power supplies and embedded computing boards that step down a 12 V or 24 V bus to a fixed 3.3 V rail at up to 5 A for FPGAs, microcontrollers, memory, and digital logic. Its 8 V to 40 V input range suits telecommunications equipment, industrial automation controllers, and motor drive auxiliary power stages operating from variable DC bus voltages. The exposed-pad VDFN package enables efficient thermal management at 5 A output current without requiring external heatsinks when adequate PCB copper area is provided.
What are the specifications of LM2677SD-3.3/NOPB?
| Pbfree Code | Yes |
| YTEOL | 15 |
| Analog IC - Other Type | SWITCHING REGULATOR |
| Control Mode | VOLTAGE-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 40V |
| Input Voltage-Min | 8V |
| Input Voltage-Nom | 12V |
| JESD-30 Code | R-XDSO-N14 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Output Current-Max | 5A |
| Output Voltage-Max | 37V |
| Output Voltage-Min | 1.23V |
| Output Voltage-Nom | 3.3V |
| Package Body Material | UNSPECIFIED |
| Package Equivalence Code | SOLCC14,.2,32 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Surface Mount | YES |
| Switcher Configuration | BUCK |
| Switching Frequency-Max | 260kHz |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.8mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Small Outline No-lead |
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 LM2677SD-3.3/NOPB datasheet?
LM2677SD-3.3/NOPB Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for LM2677SD-3.3/NOPB?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What output voltage and maximum current does the LM2677SD-3.3/NOPB deliver, and which load types does that suit?
The LM2677SD-3.3/NOPB delivers a fixed 3.3 V output at up to 5 A, providing sufficient current for FPGAs, microcontrollers, DDR memory, and digital logic rails in industrial controllers, networking equipment, and embedded computing boards operating from a 12 V input bus.
How wide is the input voltage range of the LM2677SD-3.3/NOPB, and what bus standards does it support?
The LM2677SD-3.3/NOPB accepts input voltages from 8 V to 40 V, covering standard 12 V ATX and industrial bus rails, 24 V factory automation supplies, and unregulated adapter inputs up to 40 V, making it versatile for both bench and harsh industrial environments.
How does the voltage-mode PWM control in the LM2677SD-3.3/NOPB affect loop compensation design compared to peak-current-mode controllers?
Voltage-mode PWM control in the LM2677SD-3.3/NOPB uses output voltage feedback directly, requiring a type-II or type-III external compensator but offering simpler noise immunity and predictable gain-phase characteristics at 5 A output, compared to current-mode designs that need slope compensation networks.
Does the exposed-pad VDFN package on the LM2677SD-3.3/NOPB adequately handle thermal dissipation at full 5 A load?
Yes, the 14-pin VDFN package includes an exposed thermal pad that transfers heat directly to the PCB ground plane. With adequate copper area and thermal vias, the LM2677SD-3.3/NOPB can sustain 5 A output at 3.3 V without an external heatsink under typical industrial ambient temperatures.
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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.
More from Texas Instruments
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 250+ | $5.0800 | $1270.00 |
| 500+ | $3.6500 | $1825.00 |
| 1000+ | $3.4400 | $3440.00 |
| 10000+ | $3.2400 | $32400.00 |
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