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Texas Instruments LM3668SD-2833EV/NOPB
- Part No.:
- LM3668SD-2833EV/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- Datasheet:
-
LM3668SD-2833EV/NOPB.pdf
- Description:
- EVAL BOARD FOR LM3668
- Quantity:
- Payment:
- Shipping:
Inventory:2,780
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Product details
Overview
LM3668SD-2833EV/NOPB from Texas Instruments is an evaluation board for the LM3668 synchronous buck-boost DC-DC converter, configured to demonstrate dual-output 2.8 V / 3.3 V operation with up to 1 A load capability across 2.5 V–5.5 V input. It implements forced PWM or automatic mode via MODE/SYNC, voltage selection via VSEL, and features WSON-12 packaging with thermal DAP grounding.
For engineers reviewing the LM3668SD-2833EV/NOPB datasheet, LM3668SD-2833EV/NOPB pinout, LM3668SD-2833EV/NOPB application, or LM3668SD-2833EV/NOPB equivalent, this board supports rapid validation of buck-boost power architecture in portable systems requiring dynamic output voltage switching and high-efficiency regulation at low input voltages.
Technical Context
The LM3668SD-2833EV/NOPB implements a four-switch buck-boost topology with integrated PFET/NFET power stages (SW1, SW2), enabling seamless transition between step-down and step-up modes without discontinuity. It operates across 2.5 V–5.5 V input and delivers regulated 2.8 V or 3.3 V outputs based on logic level at VSEL.
Control architecture includes selectable operating modes: automatic PFM/PWM hybrid (MODE/SYNC = LOW) or forced PWM (MODE/SYNC = HIGH), with optional external clock synchronization from 1.6 MHz to 2.7 MHz. Feedback is closed via FB pin connected to output filter, while EN enables/disables regulation digitally.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 2.5 V to 5.5 V - supports single-cell Li-ion, Li-polymer, or multi-cell alkaline inputs without pre-regulation. |
| VOUT Options | 2.8 V or 3.3 V - selected by logic level on VSEL pin; no external resistor network required. |
| Max Load Current | 1 A at VIN ≥ 2.8 V - sufficient for powering core logic, RF transceivers, or display drivers in portable devices. |
| Switching Frequency | 1.6 MHz to 2.7 MHz (sync-capable) - enables use of small 2.2 µH inductors and compact ceramic capacitors. |
| Topology | Synchronous 4-switch buck-boost - eliminates diode losses, achieves >90% efficiency across wide VIN/VOUT ratios. |
| Enable Control | Digital EN pin - allows precise system-level power sequencing and standby current < 1 µA. |
| Thermal Management | Exposed DAP tied to SGND - provides low-thermal-resistance path for heat dissipation in space-constrained layouts. |
Availability
LM3668SD-2833EV/NOPB is available at Aetrix Electronics and suitable for portable medical monitors, handheld test equipment, and battery-powered IoT gateways requiring stable component supply during prototyping and pre-production validation phases.
Supply support for LM3668SD-2833EV/NOPB includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor company headquartered in Dallas, Texas, specializing in analog, embedded processing, and power management technologies since 1930.
The LM3668 product line targets ultra-compact, high-efficiency power conversion in space- and battery-constrained applications such as wearables, smart sensors, and portable instrumentation where input voltage may dip below nominal output.
FAQ
What is the primary function of the LM3668SD-2833EV/NOPB?
The LM3668SD-2833EV/NOPB is an evaluation board designed to demonstrate the operation of the LM3668 synchronous buck-boost DC-DC converter IC. It validates dual-output voltage capability (2.8 V/3.3 V), supports input ranges from 2.5 V to 5.5 V, and enables engineers to verify performance under real-world load and thermal conditions before integrating the LM3668 into final designs.
How do I configure the LM3668SD-2833EV/NOPB for 2.8 V output?
To configure the LM3668SD-2833EV/NOPB for 2.8 V output, set the VSEL pin to logic LOW using the provided jumper. The board ships default-configured for 3.3 V; moving the VSEL jumper to the inner (grounded) position selects 2.8 V. This configuration is implemented directly through the LM3668's internal feedback divider and requires no external component changes on the LM3668SD-2833EV/NOPB.
Can the LM3668SD-2833EV/NOPB operate in forced PWM mode?
Yes, the LM3668SD-2833EV/NOPB supports forced PWM mode by setting the MODE/SYNC pin to logic HIGH via its onboard jumper. In this mode, the LM3668 maintains constant switching frequency regardless of load, eliminating audible noise and improving EMI predictability-critical for sensitive analog or RF subsystems powered by the LM3668SD-2833EV/NOPB.
What is the role of the DAP pad on the LM3668SD-2833EV/NOPB?
The DAP (Die Attach Pad) on the LM3668SD-2833EV/NOPB is an exposed thermal pad on the underside of the WSON-12 package. It must be soldered to a dedicated SGND copper area on the PCB to enhance thermal performance. While it improves heat dissipation, the DAP is not intended as the primary ground return path for power or signal currents in the LM3668SD-2833EV/NOPB layout.
Does the LM3668SD-2833EV/NOPB support external clock synchronization?
Yes, the LM3668SD-2833EV/NOPB supports external clock synchronization via the MODE/SYNC pin when operated in forced PWM mode. Applying a 1.6 MHz–2.7 MHz square-wave clock signal to this pin synchronizes the LM3668's internal oscillator, allowing coordinated switching with other converters on the same board-a key capability demonstrated on the LM3668SD-2833EV/NOPB for noise-sensitive multi-rail systems.
LM3668SD-2833EV/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Packaging:
- Box
- Product Status:
- Obsolete
- Main Purpose:
- DC/DC, Step Up or Down
- Outputs and Type:
- 1 Non-Isolated Output
- Voltage - Output:
- -
- Current - Output:
- 2.8V or 3.3V
- Voltage - Input:
- 1A
- Regulator Topology:
- 2.5V ~ 5.5V
- Frequency - Switching:
- Buck-Boost
- Contents:
- 2.2MHz
- Utilized IC / Part:
- Board(s)
- Power - Output:
- LM3668
LM3668SD-2833EV/NOPB FAQ
1.How can I place an order for LM3668SD-2833EV/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3668SD-2833EV/NOPB on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LM3668SD-2833EV/NOPB reliable?
The price and inventory of LM3668SD-2833EV/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3668SD-2833EV/NOPB is usually 5 days.
3.What payment methods are accepted for LM3668SD-2833EV/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3668SD-2833EV/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3668SD-2833EV/NOPB?
LM3668SD-2833EV/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3668SD-2833EV/NOPB order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LM3668SD-2833EV/NOPB?
For technical support, including LM3668SD-2833EV/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3668SD-2833EV/NOPB requirements.
6.How does Aetrix verify that LM3668SD-2833EV/NOPB is sourced from the original manufacturer or authorized distributors?
All LM3668SD-2833EV/NOPB products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LM3668SD-2833EV/NOPB meets industry standards.
7.What is the process for return or replacement of LM3668SD-2833EV/NOPB?
All LM3668SD-2833EV/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM3668SD-2833EV/NOPB, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LM3668SD-2833EV/NOPB part is unused and in its original packaging.
Return procedure for LM3668SD-2833EV/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM3668SD-2833EV/NOPB Tags
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