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Texas Instruments LM2700MT-ADJ/NOPB
- Part No.:
- LM2700MT-ADJ/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM2700MT-ADJ/NOPB.pdf
- Description:
- IC REG BOOST ADJ 2.55A 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,753
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Product details
Overview
LM2700MT-ADJ/NOPB from Texas Instruments is a pin-selectable 600 kHz / 1.25 MHz, 2.5 A step-up PWM DC/DC converter with an integrated 3.6 A / 80 mΩ NMOS switch, adjustable output up to 17.5 V, and input voltage range of 2.2 V to 12 V. It delivers 500 mA at 8 V from a single Li-ion cell and is engineered for LCD bias supplies in portable electronics.
For engineers reviewing the LM2700MT-ADJ/NOPB datasheet, LM2700MT-ADJ/NOPB pinout, LM2700MT-ADJ/NOPB application, or LM2700MT-ADJ/NOPB equivalent, key selection criteria include its dual-frequency operation, internal current-limiting switch, compensation-pin-based loop stability control, thermal shutdown, and undervoltage protection - all critical for compact, high-efficiency boost designs in handheld and battery-powered systems.
Technical Context
The LM2700MT-ADJ/NOPB employs current-mode PWM control with ramp compensation to suppress sub-harmonic oscillation above 50% duty cycle. Its VC pin provides direct access to the error amplifier output for external compensation network tuning using RC/CC networks.
It integrates dedicated protection circuitry: input undervoltage lockout (UVP) with 1.95–2.2 V on-threshold, overtemperature shutdown, and output overvoltage protection. Shutdown mode reduces quiescent current to 5 µA, while switching IQ is 2.0 mA at 600 kHz and 3.0 mA at 1.25 MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switch Current Limit | 2.55–4.3 A; sets peak inductor current and defines maximum load capability under transient or short-circuit conditions |
| Feedback Voltage | 1.2285–1.2915 V; reference used with external resistor divider to set precise output voltage (e.g., 8 V, 12 V, or 17.5 V) |
| Switch RDS(on) | 80–150 mΩ at VIN = 2.7 V; determines conduction loss and thermal rise during high-current operation |
| Switching Frequency | 480–720 kHz (FSLCT = GND) or 1–1.5 MHz (FSLCT = VIN); selects trade-off between inductor size, EMI filtering, and efficiency |
| Input Voltage Range | 2.2–12 V; supports single-cell Li-ion (2.7–4.2 V), 3.3 V logic rails, and multi-cell alkaline/NiMH sources |
| Max Duty Cycle | 78–85%; enables high step-up ratios (e.g., 3.3 V → 12 V ≈ 72% duty) while maintaining stable current-mode control |
| Thermal Resistance (TSSOP) | 150 °C/W; defines junction-to-ambient temperature rise per watt dissipated - critical for layout and heatsinking decisions |
Pinout & Package
LM2700MT-ADJ/NOPB is packaged in a 14-lead TSSOP (MT suffix), with exposed thermal pad for enhanced power dissipation. Pin assignments are identical to the WSON variant per TI's package option addendum and connection diagram.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VC | Compensation network node | Connects to output of internal error amplifier; RC/CC network here sets dominant pole-zero pair for loop stability |
| FB | Voltage feedback input | Senses divided output voltage; regulates output by comparing to 1.26 V internal reference |
| SHDN | Active-low enable control | Pulls low to disable switching and reduce supply current to 5 µA; requires ≥0.9 V to remain active |
| AGND | Analog ground reference | Reference for FB, VC, and internal analog circuitry; must be tied directly to PGND at package |
| PGND ×3 | Power ground return | Low-impedance return path for switch and inductor current; all three pins must be connected together at PCB |
| SW ×3 | Switch node | Drives external inductor; connects internally to NMOS drain; shared node for high di/dt current paths |
| VIN | Input power supply | Supplies both analog and power sections; bypass capacitor required close to pin |
| FSLCT | Frequency select input | GND = 600 kHz, VIN = 1.25 MHz; configures oscillator without external components |
| NC ×2 | No-connect terminals | Pin 11 and Pin 14 are unconnected; Pin 14 must be grounded per datasheet recommendation |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable Output Voltage | Up to 17.5 V via external resistor divider on FB pin - enables flexible bias generation for TFT-LCD VPOS/VNEG/VCOM |
| Pin-Selectable Switching Frequency | 600 kHz or 1.25 MHz via FSLCT pin - allows optimization of inductor size, EMI, and efficiency without redesign |
| Integrated 3.6 A / 80 mΩ NMOS Switch | Eliminates external MOSFET and gate driver; reduces BOM count and PCB area in space-constrained portable designs |
| External Compensation (VC Pin) | Enables custom pole-zero placement for stable operation across wide load/output capacitance ranges - critical for ceramic-capacitor-based outputs |
| Continuous Conduction Mode Operation | Maintains regulation down to light loads without pulse-skipping - ensures low-noise, predictable output ripple in sensitive analog circuits |
| Comprehensive Protection Suite | Includes UVP (1.95–2.2 V), thermal shutdown (~150 °C), and OVP - prevents damage during startup, overload, or ambient extremes |
Applications
| Handheld Device Power Management | LCD Panel Bias Generation |
|---|---|
Use Scenario: Powering backlight drivers and gate drivers in smartphones and PDAs operating from 3.3 V or single Li-ion cells. IC Role / Device Role / Timing Role: Step-up regulator generating 8–12 V bias rails from low-voltage battery sources; operates continuously at light loads. Use Value: Enables compact, high-efficiency bias supply with no external MOSFET, reducing solution size and component count. | Use Scenario: Providing positive and negative bias voltages (e.g., +8 V, −8 V, VCOM) for active-matrix TFT-LCD modules in portable instrumentation. IC Role / Device Role / Timing Role: Primary boost converter in triple-output bias supply; configured at 600 kHz for optimal EMI and inductor sizing. Use Value: Adjustable output and stable current-mode control ensure accurate, ripple-free bias rails essential for display contrast and grayscale fidelity. |
| Digital Camera Flash Charging | GSM/CDMA RF Front-End Supply |
Use Scenario: Charging high-voltage capacitors for xenon flash circuits in compact digital cameras powered by 3.3 V or 3.7 V batteries. IC Role / Device Role / Timing Role: High-current boost stage delivering >500 mA pulses to storage capacitors; leverages 2.5 A current limit and fast transient response. Use Value: Integrated 80 mΩ switch minimizes conduction loss during rapid charge cycles, improving flash recharge time and battery life. | Use Scenario: Supplying 5–7 V rails to RF power amplifiers and transceiver ICs in 2G/3G mobile handsets requiring low-noise, dynamically responsive power. IC Role / Device Role / Timing Role: Efficient intermediate bus converter; operates at 1.25 MHz to minimize inductor footprint and improve transient immunity to PA burst loading. Use Value: 3.0 mA quiescent current at 1.25 MHz and shutdown mode (<5 µA) extend standby battery life without sacrificing RF performance. |
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 8-A switch, 2.7–12-V input, fixed 500-kHz/2-MHz frequency; no VC pin for full loop compensation | Targets higher-power applications (e.g., USB PD sink, SSD power); less suitable for precision bias where VC tuning is required | Select when >3 A output current or integrated soft-start is needed; avoid if VC-based loop optimization is mandatory |
| MAX17062ETA+ | 2.5-A switch, 2.6–5.5-V input only, fixed 1.2-MHz frequency, no UVP or thermal shutdown | Optimized for ultra-low-input systems (e.g., coin-cell–powered sensors); lacks protection features critical for Li-ion applications | Select only for narrow-input, low-power bias; not drop-in for 2.2–12 V or thermally demanding environments |
Compared with TPS61088RHLR and MAX17062ETA+, the LM2700MT-ADJ/NOPB uniquely balances wide input range (2.2–12 V), user-tunable compensation (VC pin), comprehensive protection (UVP, thermal, OVP), and dual-frequency flexibility - making it optimal for robust, space-constrained LCD bias and portable power applications where design margin and stability are prioritized over peak current.
Availability
LM2700MT-ADJ/NOPB is available at Aetrix Electronics and suitable for LCD bias supplies, handheld device power management, and portable camera flash charging requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LM2700MT-ADJ/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 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 compact, high-efficiency boost conversion in battery-powered portable electronics - emphasizing low quiescent current, integrated protection, and flexible output configuration for LCD and RF subsystems.
FAQ
What is the maximum output voltage achievable with LM2700MT-ADJ/NOPB?
The LM2700MT-ADJ/NOPB supports an adjustable output voltage up to 17.5 V, as specified in the Absolute Maximum Ratings and confirmed in the Electrical Characteristics table. This is achieved using an external resistor divider on the FB pin, where the internal 1.26 V reference sets the scaling ratio. Operation beyond 17.5 V risks exceeding the 18 V SW pin rating and may trigger overvoltage protection or damage.
Does LM2700MT-ADJ/NOPB require an external Schottky diode?
Yes, the LM2700MT-ADJ/NOPB requires an external Schottky diode connected between the SW pin and output capacitor. The IC integrates only the NMOS switch; the diode completes the boost topology's current path during the off-cycle. TI recommends Schottky diodes with reverse voltage ≥ output voltage and peak current rating exceeding the switch current limit (≥4.3 A) for reliability under fault conditions.
How does the FSLCT pin affect LM2700MT-ADJ/NOPB performance?
The FSLCT pin selects switching frequency: grounded for 600 kHz (typical 600 kHz), or tied to VIN for 1.25 MHz (typical 1.25 MHz). At 600 kHz, the LM2700MT-ADJ/NOPB achieves higher efficiency with larger inductors (e.g., 4.7 µH) and lower switching losses; at 1.25 MHz, it enables smaller magnetics (e.g., 2.2 µH) and reduced solution footprint but increases quiescent current to 3.0 mA.
Can LM2700MT-ADJ/NOPB operate with ceramic output capacitors?
Yes, the LM2700MT-ADJ/NOPB is explicitly designed for use with low-ESR ceramic output capacitors. Its VC pin allows full external compensation, enabling stable loop response even with near-zero-ESR ceramics. TI recommends 10 µF minimum output capacitance and provides RC/CC design equations in the datasheet to place poles/zeros that counteract right-half-plane zero effects inherent to boost topologies.
What is the purpose of the three PGND and three SW pins on LM2700MT-ADJ/NOPB?
The three PGND and three SW pins on LM2700MT-ADJ/NOPB reduce parasitic inductance and resistance in high-current paths. All PGND pins must be connected together directly at the package footprint to minimize ground bounce; all SW pins serve the same internal switch node and must be routed with low-inductance copper to the inductor and diode. This multi-pin layout improves thermal dissipation and maintains current-mode control accuracy under dynamic load conditions.
LM2700MT-ADJ/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- 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
LM2700MT-ADJ/NOPB FAQ
1.How can I place an order for LM2700MT-ADJ/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2700MT-ADJ/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 LM2700MT-ADJ/NOPB reliable?
The price and inventory of LM2700MT-ADJ/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2700MT-ADJ/NOPB is usually 5 days.
3.What payment methods are accepted for LM2700MT-ADJ/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2700MT-ADJ/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2700MT-ADJ/NOPB?
LM2700MT-ADJ/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2700MT-ADJ/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 LM2700MT-ADJ/NOPB?
For technical support, including LM2700MT-ADJ/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2700MT-ADJ/NOPB requirements.
6.How does Aetrix verify that LM2700MT-ADJ/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2700MT-ADJ/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 LM2700MT-ADJ/NOPB meets industry standards.
7.What is the process for return or replacement of LM2700MT-ADJ/NOPB?
All LM2700MT-ADJ/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2700MT-ADJ/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 LM2700MT-ADJ/NOPB part is unused and in its original packaging.
Return procedure for LM2700MT-ADJ/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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