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Texas Instruments LM2700QMT-ADJ/NOPB
- Part No.:
- LM2700QMT-ADJ/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM2700QMT-ADJ/NOPB.pdf
- Description:
- IC REG BOOST ADJ 2.55A 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,764
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Product details
Overview
LM2700QMT-ADJ/NOPB from Texas Instruments is an AEC-Q100 Grade 2 qualified step-up DC/DC converter with 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–12V input and delivers up to 500mA at 8V from a single Li-ion cell, making it suitable for LCD bias supplies in automotive infotainment displays.
For engineers reviewing the LM2700QMT-ADJ/NOPB datasheet, LM2700QMT-ADJ/NOPB pinout, LM2700QMT-ADJ/NOPB application, or LM2700QMT-ADJ/NOPB equivalent, key selection criteria include its dual-frequency selectability, internal current-limit protection (2.55–4.3A), thermal shutdown, input undervoltage lockout (1.95–2.2V on-threshold), and compensation-pin-based loop stability tuning for ceramic-output-capacitor designs.
Technical Context
The LM2700QMT-ADJ/NOPB implements current-mode PWM control with ramp compensation to suppress subharmonic oscillation above 50% duty cycle. Its error amplifier features 1.26V feedback reference, 40–290 µmho transconductance, and 135 V/V gain, enabling precise output regulation across load and line variations.
It integrates dedicated protection circuits: thermal shutdown at ~150°C junction temperature, input undervoltage protection (UVP) with hysteresis, and overvoltage protection (OVP) to clamp no-load output rise. Shutdown mode reduces quiescent current to 5µA, while operating IQ is 2.0mA (600kHz) or 3.0mA (1.25MHz).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.2V to 12V - supports single-cell Li-ion (3.0–4.2V), 3.3V/5V rails, and automotive battery transients. |
| Output Voltage Range | Adjustable up to 17.5V - set via external resistor divider; FB pin reference is 1.26V ±2.5%. |
| Switch Current Limit | 2.55A to 4.3A - ensures robust short-circuit and overload handling; varies with VIN and duty cycle. |
| Internal Switch RDS(on) | 80mΩ typical at VIN = 2.7V - enables high efficiency at medium loads; measured die-to-die, excluding bond wires. |
| Quiescent Current | 2.0mA @ 600kHz / 3.0mA @ 1.25MHz - defines light-load efficiency; drops to 5µA in shutdown. |
| Thermal Resistance θJA | 45°C/W (WSON) - enables >1.5W continuous power dissipation in compact layouts with proper copper pour. |
| Operating Junction Temp | −40°C to +105°C - AEC-Q100 Grade 2 qualified for under-hood and dashboard electronics. |
Pinout & Package
LM2700QMT-ADJ/NOPB is packaged in a thermally enhanced 14-lead WSON (4.0mm × 4.0mm, 0.65mm pitch) with exposed thermal pad. This package provides 45°C/W junction-to-ambient thermal resistance and supports high-current PGND routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VC | Compensation network connection | Connects to error amplifier output; sets loop stability via RC/CC network to support low-ESR ceramic capacitors. |
| FB | Feedback input | Senses output voltage via resistor divider; internal 1.26V reference enables precise adjustable regulation. |
| SHDN | Shutdown control | Active-low logic input; pulls supply current to 5µA when asserted; threshold is 0.6V max (low) / 0.9V min (high). |
| AGND | Analog ground | Reference for FB, VC, and internal analog circuitry; must be tied directly to PGND at package for noise immunity. |
| PGND (Pins 5–7) | Power ground | High-current return path for switch and inductor; three pins minimize IR drop and improve thermal performance. |
| SW (Pins 8–10) | Switch node | Drives external inductor; connects internally to NMOS drain; requires low-inductance layout to reduce EMI. |
| VIN | Input power supply | Supplies analog and power circuitry; must be bypassed with ≥10µF low-ESR capacitor near pin. |
| FSLCT | Frequency select | Ground = 600kHz; connect to VIN = 1.25MHz - enables layout optimization for size (1.25MHz) or efficiency (600kHz). |
| NC (Pins 11, 14) | No connect | Pin 11 is unconnected; Pin 14 must be grounded per datasheet to ensure proper operation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 2 qualification | Validated for −40°C to +105°C operation with full electrical testing - meets automotive reliability requirements without derating. |
| Pin-selectable switching frequency | 600kHz or 1.25MHz selection via FSLCT pin - allows trade-off between inductor size (smaller at 1.25MHz) and conversion efficiency (higher at 600kHz). |
| Integrated 3.6A/80mΩ NMOS switch | Eliminates external MOSFET and gate driver - reduces BOM count and PCB area while maintaining >85% peak efficiency at 500mA/8V. |
| External compensation (VC pin) | Enables custom loop tuning with RC/CC network - supports stable operation with ceramic output capacitors and wide load ranges. |
| Input undervoltage & thermal protection | UVP locks out operation below 1.95V; thermal shutdown disables switch above ~150°C - prevents damage during cold cranking or overload. |
Applications
| Automotive LCD Bias Supply | Portable Medical Display Power |
|---|---|
Use Scenario: Generating +12V and −8V bias rails for TFT-LCD panels in vehicle instrument clusters and center consoles. IC Role / Device Role / Timing Role: Primary boost regulator providing regulated positive output; paired with inverting charge pump for negative rail generation. Use Value: AEC-Q100 qualification ensures reliability across temperature cycling and vibration; 600kHz operation minimizes EMI in safety-critical cockpit environments. | Use Scenario: Powering monochrome or color LCD modules in handheld ultrasound and glucose monitors powered by single Li-ion cells. IC Role / Device Role / Timing Role: Step-up converter delivering stable 8V output from 3.3V system rail; enables consistent backlight brightness and contrast control. Use Value: Low 2.0mA quiescent current extends battery life; adjustable output accommodates varying display voltage requirements across product families. |
| GSM/CDMA Handset Backlight Driver | Digital Camera CCD Bias Generator |
Use Scenario: Driving white LED arrays or electroluminescent (EL) backlights in legacy 2G/3G mobile handsets with tight board space. IC Role / Device Role / Timing Role: High-efficiency boost controller supplying 15–17.5V to EL panels; configured with 1.25MHz switching for minimal inductor footprint. Use Value: 1.25MHz operation allows use of 2.2µH inductors - reduces solution size by >40% vs. 600kHz designs while maintaining >82% efficiency at 100mA. | Use Scenario: Providing clean, low-noise +15V bias for CCD image sensors in compact digital cameras and action cams. IC Role / Device Role / Timing Role: Precision-adjustable boost converter with tight output regulation (±2.5% FB tolerance) and low output ripple (<20mVpp with 22µF ceramic). Use Value: VC pin compensation enables optimized transient response to sensor exposure pulses; thermal shutdown prevents overheating during burst capture sequences. |
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 |
|---|---|---|---|
| LM27313QSDX/NOPB | Higher 1.6MHz fixed frequency; lower 2.1A current limit; 3mm × 3mm WSON-10 package. | Better suited for ultra-compact, high-density layouts where 1.25MHz is acceptable but 600kHz flexibility is not required. | Select when board space is critical and maximum output current ≤2A suffices; verify UVP and thermal limits for same operating conditions. |
| TPS61088RHLR | 10A switch; wider 2.7–12V input; fixed 500kHz/1MHz option; no AEC-Q100 qualification. | Targeted at industrial and consumer portable devices requiring higher output power, not automotive-grade reliability. | Choose for non-automotive applications needing >2.5A output or tighter input UVLO (2.5V); avoid where AEC-Q100 compliance is mandatory. |
Compared with LM2700QMT-ADJ/NOPB, LM27313QSDX/NOPB trades frequency flexibility and current capability for smaller footprint, while TPS61088RHLR offers higher power delivery without automotive qualification - making LM2700QMT-ADJ/NOPB the only AEC-Q100-compliant option among the three with dual-frequency selectability and 3.6A robustness.
Availability
LM2700QMT-ADJ/NOPB is available at Aetrix Electronics and suitable for automotive infotainment systems, portable medical displays, GSM/CDMA handset power management, and digital camera CCD biasing requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM2700QMT-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 ICs, with deep expertise in automotive, industrial, and personal electronics.
The LM2700Q product line was designed specifically for high-reliability, wide-input-voltage boost conversion in automotive display and portable communication applications - emphasizing AEC-Q100 compliance, thermal robustness, and flexible frequency selection.
FAQ
What is the maximum adjustable output voltage supported by the LM2700QMT-ADJ/NOPB?
The LM2700QMT-ADJ/NOPB supports an adjustable output voltage up to 17.5V, as specified in the Absolute Maximum Ratings table. This limit is enforced by the internal switch breakdown voltage and OVP circuitry. Output voltage is set using a resistor divider from VOUT to FB, with the FB pin held at 1.26V nominal. Exceeding 17.5V risks damaging the internal NMOS switch or triggering overvoltage protection.
Does the LM2700QMT-ADJ/NOPB require an external Schottky diode?
Yes, the LM2700QMT-ADJ/NOPB requires an external Schottky diode connected between the SW pin and VOUT. The IC contains only the NMOS switch and control circuitry; the diode completes the boost power path during the off-cycle. TI recommends Schottky diodes rated for ≥18V reverse voltage and peak current exceeding the switch current limit (≥4.3A) to ensure reliability under fault conditions.
How does the FSLCT pin affect efficiency and thermal performance of the LM2700QMT-ADJ/NOPB?
The FSLCT pin selects between 600kHz (ground) and 1.25MHz (VIN) operation. At 600kHz, the LM2700QMT-ADJ/NOPB achieves higher peak efficiency (up to 88% at 500mA/8V) and lower switching losses, reducing die temperature. At 1.25MHz, core and switching losses increase, lowering efficiency by ~3–5%, but enables smaller inductors and reduced solution size - a trade-off validated in TI's typical performance curves (Figures 3–6).
Can the LM2700QMT-ADJ/NOPB operate in discontinuous conduction mode (DCM)?
Yes, the LM2700QMT-ADJ/NOPB operates in both continuous and discontinuous conduction modes depending on load, input voltage, and inductor value. The datasheet confirms DCM occurs when inductor ripple current exceeds average inductor current. The IC maintains regulation in DCM, but loop compensation must be re-optimized - TI recommends using the same VC compensation network design procedure for both modes, with attention to right-half-plane zero placement.
What is the purpose of the separate AGND and PGND pins on the LM2700QMT-ADJ/NOPB?
The LM2700QMT-ADJ/NOPB uses separate AGND (analog ground) and PGND (power ground) pins to isolate noise-sensitive control circuitry from high-current switching paths. AGND references the FB and VC pins; PGND carries switch and inductor return current. They must be tied together directly at the package - not on the PCB plane - to prevent PGND voltage spikes from modulating the feedback loop and causing instability or output ripple.
LM2700QMT-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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
LM2700QMT-ADJ/NOPB FAQ
1.How can I place an order for LM2700QMT-ADJ/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2700QMT-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 LM2700QMT-ADJ/NOPB reliable?
The price and inventory of LM2700QMT-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 LM2700QMT-ADJ/NOPB is usually 5 days.
3.What payment methods are accepted for LM2700QMT-ADJ/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2700QMT-ADJ/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2700QMT-ADJ/NOPB?
LM2700QMT-ADJ/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2700QMT-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 LM2700QMT-ADJ/NOPB?
For technical support, including LM2700QMT-ADJ/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2700QMT-ADJ/NOPB requirements.
6.How does Aetrix verify that LM2700QMT-ADJ/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2700QMT-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 LM2700QMT-ADJ/NOPB meets industry standards.
7.What is the process for return or replacement of LM2700QMT-ADJ/NOPB?
All LM2700QMT-ADJ/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2700QMT-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 LM2700QMT-ADJ/NOPB part is unused and in its original packaging.
Return procedure for LM2700QMT-ADJ/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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