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Texas Instruments LM2700MTX-ADJ
- Part No.:
- LM2700MTX-ADJ
- Manufacturer:
- Texas Instruments
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM2700MTX-ADJ.pdf
- Description:
- IC REG BOOST ADJ 2.55A 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,061
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Product details
Overview
LM2700MTX-ADJ from Texas Instruments is a step-up PWM DC/DC converter with an integrated 3.6A/80mΩ NMOS switch, pin-selectable 600kHz or 1.25MHz switching frequency, and adjustable output voltage up to 17.5V. It operates from 2.2V to 12V input and delivers up to 2.5A output current, making it suitable for LCD bias supplies in portable devices powered by single-cell Li-ion batteries.
For engineers reviewing the LM2700MTX-ADJ datasheet, LM2700MTX-ADJ pinout, LM2700MTX-ADJ application, or LM2700MTX-ADJ equivalent, key selection criteria include its internal switch RDS(ON), dual-frequency selectability via FSLCT, adjustable feedback reference (1.26V), thermal shutdown protection, and compatibility with ceramic output capacitors in compact TSSOP-14 or WSON-14 packages.
Technical Context
The LM2700MTX-ADJ implements current-mode PWM control with dedicated ramp compensation to suppress sub-harmonic oscillation above 50% duty cycle. Its VC pin provides external error amplifier compensation, enabling stable operation with low-ESR ceramic output capacitors.
It integrates input undervoltage lockout (UVP threshold: 1.95–2.2V), overtemperature shutdown, and active-low shutdown (SHDN) drawing only 5µA in sleep mode. The device supports continuous conduction mode (CCM) down to light loads and features separate AGND and PGND pins for noise isolation between analog and power sections.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.2V to 12V - supports single Li-ion (3.0–4.2V), NiMH, or 3.3V/5V system rails without pre-regulation. |
| Output Voltage Range | Adjustable up to 17.5V - set via external resistor divider on FB pin with 1.26V reference; enables triple-rail TFT bias generation. |
| Switch Current Limit | 2.55A (min) at VIN = 2.7V - ensures reliable 2.5A output delivery under worst-case input conditions. |
| Switch RDS(ON) | 80mΩ (typ) at VIN = 2.7V - minimizes conduction loss and thermal rise in high-current boost topologies. |
| Quiescent Current | 2.0mA at 600kHz (not switching) - balances efficiency at light load with fast transient response capability. |
| Switching Frequency | 600kHz (FSLCT = GND) or 1.25MHz (FSLCT = VIN) - allows trade-off between inductor size (2.2µH vs 4.7µH) and EMI filtering complexity. |
| Thermal Shutdown | Activates at ~150°C junction temperature - protects against sustained overload or poor PCB thermal design. |
Pinout & Package
LM2700MTX-ADJ is available in a 14-lead TSSOP package (PW) and a 14-lead WSON package (NHE); both are RoHS-compliant, lead-free, and moisture-sensitive level 3 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VC | Compensation network connection | Connects external RC/CC network to stabilize voltage loop; sets dominant pole and zero for CCM stability. |
| FB | Feedback input | Senses output voltage via resistor divider; internal 1.26V reference enables precise adjustable regulation. |
| SHDN | Active-low shutdown control | Pulls <0.3V to disable switching and reduce supply current to 5µA; compatible with standard logic outputs. |
| AGND | Analog ground reference | Reference for FB, VC, and internal error amplifier; must tie directly to PGND at package for noise immunity. |
| PGND (Pins 5,6,7) | Power ground return | Low-impedance return path for switch current; all three pins must be connected together at the IC footprint. |
| SW (Pins 8,9,10) | Switch node | Drives external inductor and Schottky diode; handles peak currents up to 3.6A with minimal trace inductance. |
| VIN | Analog power input | Supplies internal circuitry and gate driver; requires local 10–47µF low-ESR bypass capacitor. |
| FSLCT | Frequency select input | GND = 600kHz, VIN = 1.25MHz; determines inductor sizing, EMI profile, and light-load efficiency. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 3.6A/80mΩ NMOS switch | Eliminates external MOSFET and gate driver, reducing BOM count and layout area while maintaining >85% efficiency at 500mA–2A loads. |
| Pin-selectable 600kHz/1.25MHz operation | Enables optimization of magnetic component size (2.2µH vs 4.7µH) and EMI filter requirements without changing IC or firmware. |
| External compensation via VC pin | Allows full control over loop stability across wide output capacitance and load ranges using standard RC/CC networks. |
| Dedicated AGND and PGND pins | Prevents switching noise coupling into feedback path, ensuring accurate regulation and low output ripple in noise-sensitive applications. |
| Input UVLO with hysteresis (1.95V–2.2V) | Blocks operation during battery brownout or cold-start, protecting downstream circuitry and preventing erratic behavior. |
Applications
| Handheld Device Power Supply | LCD Bias Generation |
|---|---|
Use Scenario: Powering backlight and gate drivers in compact handhelds with single Li-ion battery (3.0–4.2V). IC Role / Device Role / Timing Role: Step-up DC/DC converter generating 8V–12V bias rails from low-input battery voltage. Use Value: Delivers 2.5A peak current with <2mA quiescent draw at 600kHz, extending battery life while supporting rapid display wake-up. | Use Scenario: Generating positive and negative bias voltages for TFT-LCD panels in portable instrumentation. IC Role / Device Role / Timing Role: Primary positive rail generator in triple-output bias supply (e.g., +8V, −5V, +15V). Use Value: Adjustable 1.26V feedback reference and stable CCM operation enable precise, ripple-sensitive panel voltage control. |
| Digital Camera Flash Charging | GSM/CDMA RF Front-End Bias |
Use Scenario: Charging high-voltage flash capacitor (300–400V) from 3.3V system rail in compact digital cameras. IC Role / Device Role / Timing Role: High-efficiency intermediate-stage boost converter feeding charge-pump or flyback stage. Use Value: 1.25MHz operation allows use of tiny 2.2µH inductor and ceramic caps, minimizing board space in ultra-thin form factors. | Use Scenario: Supplying regulated 5V or 8V bias to power amplifiers and RF switches in cellular handsets. IC Role / Device Role / Timing Role: Compact, low-noise boost regulator delivering stable voltage despite dynamic RF load transients. Use Value: Separate AGND/PGND and VC compensation support clean power delivery with <50mV output ripple under 100mA–1A load steps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-up DC/DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61088RHLR | Higher 10A switch, fixed 500kHz/2.2MHz freq, no VC pin; 12V max input. | Better suited for >3A loads and higher VIN systems; lacks external compensation flexibility. | Select when peak current >2.5A or input exceeds 12V is required; not drop-in due to different pinout and control architecture. |
| MAX17062ETA+ | 2.5A switch, 1.2MHz fixed freq, integrated soft-start, no FSLCT option; 5.5V max input. | Optimized for low-VIN, low-profile designs; limited to 5.5V input and lacks frequency selectability. | Choose for space-constrained 3.3V-input applications where 600kHz option and UVLO hysteresis are non-critical. |
Compared with TPS61088RHLR and MAX17062ETA+, the LM2700MTX-ADJ uniquely combines pin-selectable frequency, external VC compensation, and 12V input capability in a 14-pin TSSOP/WSON footprint-enabling robust, adaptable boost conversion where layout noise immunity and design flexibility are critical.
Availability
LM2700MTX-ADJ is available at Aetrix Electronics and suitable for LCD bias supplies, handheld device power management, and portable instrumentation requiring stable component supply with long-term lifecycle support.
Supply support for LM2700MTX-ADJ 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 leader specializing in analog, embedded processing, and power management technologies, with decades of expertise in high-reliability DC/DC conversion solutions.
The LM2700 product line was designed specifically for portable and battery-powered applications demanding high-efficiency, small-footprint boost conversion with flexible output voltage and robust protection features.
FAQ
What is the maximum output voltage supported by the LM2700MTX-ADJ?
The LM2700MTX-ADJ supports an adjustable output voltage up to 17.5V, set by an external resistor divider on the FB pin referencing the internal 1.26V feedback voltage. This capability enables use in multi-rail LCD bias supplies and other medium-voltage portable applications where precise regulation is required.
How does the FSLCT pin affect the operation of the LM2700MTX-ADJ?
The FSLCT pin on the LM2700MTX-ADJ selects between two switching frequencies: grounding FSLCT configures 600kHz operation, while connecting it to VIN selects 1.25MHz. This choice directly impacts inductor size (4.7µH vs 2.2µH), EMI filter design, and light-load efficiency-allowing optimization for either low-noise or ultra-compact layouts.
Can the LM2700MTX-ADJ operate in discontinuous conduction mode (DCM)?
Yes, the LM2700MTX-ADJ operates in continuous conduction mode (CCM) under typical loads but transitions naturally to discontinuous conduction mode (DCM) at very light loads. Its current-mode architecture and internal ramp compensation ensure stable regulation across both modes without external mode-control circuitry.
What is the purpose of having separate AGND and PGND pins on the LM2700MTX-ADJ?
The LM2700MTX-ADJ uses separate AGND and PGND pins to isolate sensitive analog circuitry (error amplifier, FB, VC) from high-current power switching paths (SW, PGND). This separation prevents noise coupling into the feedback loop, maintaining regulation accuracy and minimizing output voltage ripple-especially critical in display bias and RF applications.
Does the LM2700MTX-ADJ include thermal protection?
Yes, the LM2700MTX-ADJ includes integrated thermal shutdown protection that disables the internal NMOS switch when the junction temperature reaches approximately 150°C. Recovery occurs automatically once the die cools below the hysteresis threshold, providing robust fault tolerance during overload or inadequate heatsinking conditions.
LM2700MTX-ADJ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.2V
- Voltage - Input (Max):
- 12V
- Voltage - Output (Min/Fixed):
- 1.26V
- Voltage - Output (Max):
- 17.5V
- Current - Output:
- 2.55A (Switch)
- Frequency - Switching:
- 600kHz, 1.25MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
LM2700MTX-ADJ FAQ
1.How can I place an order for LM2700MTX-ADJ through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2700MTX-ADJ 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 LM2700MTX-ADJ reliable?
The price and inventory of LM2700MTX-ADJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2700MTX-ADJ is usually 5 days.
3.What payment methods are accepted for LM2700MTX-ADJ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2700MTX-ADJ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2700MTX-ADJ?
LM2700MTX-ADJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2700MTX-ADJ 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 LM2700MTX-ADJ?
For technical support, including LM2700MTX-ADJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2700MTX-ADJ requirements.
6.How does Aetrix verify that LM2700MTX-ADJ is sourced from the original manufacturer or authorized distributors?
All LM2700MTX-ADJ 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 LM2700MTX-ADJ meets industry standards.
7.What is the process for return or replacement of LM2700MTX-ADJ?
All LM2700MTX-ADJ units undergo pre-shipment inspection (PSI). If there is an issue with LM2700MTX-ADJ, 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 LM2700MTX-ADJ part is unused and in its original packaging.
Return procedure for LM2700MTX-ADJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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