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Texas Instruments LM2700LD-ADJ/NOPB
- Part No.:
- LM2700LD-ADJ/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 14-WFDFN Exposed Pad
- Datasheet:
-
LM2700LD-ADJ/NOPB.pdf
- Description:
- IC REG BOOST ADJ 2.55A 14WSON
- Quantity:
- Payment:
- Shipping:
Inventory:1,045
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Product details
Overview
LM2700LD-ADJ/NOPB from Texas Instruments is a step-up PWM DC/DC converter with an integrated 3.6A, 80mΩ NMOS switch, pin-selectable 600kHz/1.25MHz switching frequency, adjustable output voltage up to 17.5V, and input voltage range of 2.2V–12V. It delivers up to 500mA at 8V from a single Li-ion cell and is engineered for LCD bias supplies in portable electronics.
For engineers reviewing the LM2700LD-ADJ/NOPB datasheet, LM2700LD-ADJ/NOPB pinout, LM2700LD-ADJ/NOPB application, or LM2700LD-ADJ/NOPB equivalent, key selection considerations include its internal switch RDS(ON), dual-frequency selectability, adjustable feedback threshold (1.26V), thermal shutdown, and undervoltage protection - all critical for compact, high-efficiency boost designs in handheld and camera power rails.
Technical Context
The LM2700LD-ADJ/NOPB implements current-mode PWM control with dedicated ramp compensation to suppress sub-harmonic oscillation above 50% duty cycle. Its VC pin enables external compensation network tuning for stability across load and input variations.
It integrates analog ground (AGND) and power ground (PGND) separation, three parallel SW pins and three PGND pins for low-inductance power routing, and FSLCT pin logic that sets switching frequency: grounded for 600kHz (±20%), tied to VIN for 1.25MHz (±20%).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switch RDS(ON) | 80 mΩ max at VIN = 2.7V, ISW = 2A - enables high efficiency at 2.5A peak switch current and reduces thermal stress in WSON package. |
| Feedback Voltage | 1.26 V ±2.5% - sets output via resistor divider; determines accuracy of adjustable VOUT up to 17.5V. |
| Switch Current Limit | 2.55–4.3 A - ensures safe operation under overload while supporting 2.5A continuous output capability. |
| Quiescent Current | 2.0 mA at 600kHz (switching), 3.0 mA at 1.25MHz - balances light-load efficiency and transient response. |
| Input Voltage Range | 2.2 V to 12 V - supports single-cell Li-ion (2.7–4.2V), 3.3V/5V rails, and multi-cell alkaline/NiMH inputs. |
| Thermal Shutdown | Active at >150°C junction temperature - protects die during sustained overload or poor PCB thermal design. |
| Undervoltage Lockout | Turns on at VIN ≥ 2.05V, turns off at VIN ≤ 1.95V - prevents erratic startup and ensures stable regulation during battery discharge. |
Pinout & Package
LM2700LD-ADJ/NOPB uses a 14-lead WSON (NHE) package with exposed thermal pad, optimized for space-constrained portable applications. The package supports 45°C/W junction-to-ambient thermal resistance when properly soldered to PCB copper.
| 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 transient response tuning. |
| FB | Output voltage feedback input | Senses resistive divider output; regulates VOUT to 1.26V reference - enables precise adjustable output configuration. |
| SHDN | Shutdown control input | Active-low logic input; reduces supply current to 5µA in shutdown - essential for system-level power sequencing. |
| AGND | Analog ground reference | Reference for FB, VC, and internal error amplifier; must be isolated from noisy power return paths. |
| PGND (Pins 5,6,7) | Power ground return | Low-inductance return path for switch and diode current; requires direct star connection at package to minimize noise coupling. |
| SW (Pins 8,9,10) | Switch node connection | Drives external inductor and Schottky diode; three parallel pins reduce trace inductance and conduction loss. |
| FSLCT | Frequency select input | Ground = 600kHz, VIN = 1.25MHz - selects switching frequency without external clock; impacts filter size and EMI profile. |
| VIN | Analog power input | Supplies internal circuitry and switch driver; accepts 2.2–12V with UVLO protection. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 3.6A, 80mΩ NMOS switch | Eliminates external MOSFET and gate driver; reduces BOM count and layout area in space-sensitive LCD bias supplies. |
| Pin-selectable 600kHz / 1.25MHz operation | Enables trade-off between inductor size (smaller at 1.25MHz) and efficiency (higher at 600kHz) without changing firmware or control logic. |
| External compensation (VC pin) | Allows optimization of loop stability for varied output capacitors, loads, and input conditions - critical for robust performance across production variance. |
| Dual ground architecture (AGND/PGND) | Minimizes noise coupling from power switching into sensitive analog control circuitry - improves regulation accuracy and reduces output ripple. |
| Continuous conduction mode at light loads | Maintains regulation down to ~100mA without pulse-skipping; avoids audible noise and output voltage discontinuity in display bias rails. |
Applications
| Handheld Device Power | GSM/CDMA Phone Bias |
|---|---|
Use Scenario: Generating +8V bias for TFT-LCD backlight and +15V for gate driver in compact smartphones with single Li-ion battery input. IC Role / Device Role / Timing Role: Primary step-up regulator providing stable, adjustable high-voltage rails from 3.3V system rail. Use Value: Delivers 500mA at 8V with <2.0mA quiescent current at 600kHz, enabling extended battery life without sacrificing display brightness or contrast. | Use Scenario: Supplying dual-rail LCD bias (+5V AVDD, +12V VGH) in legacy GSM feature phones using alkaline/NiMH battery packs. IC Role / Device Role / Timing Role: High-efficiency boost converter operating across 2.2–12V input range with UVLO hysteresis preventing brownout resets. Use Value: Adjustable output and 1.26V precision feedback enable consistent VGH generation despite battery voltage sag, maintaining screen uniformity. |
| Digital Camera LCD Bias | Portable Medical Display Supply |
Use Scenario: Powering active-matrix LCD panels in DSLR viewfinders and mirrorless camera rear displays requiring fast transient response to image updates. IC Role / Device Role / Timing Role: Fast-response boost regulator with 1.25MHz option for minimized inductor size and reduced board footprint. Use Value: 3.6A switch current limit and low RDS(ON) support rapid load steps (e.g., backlight dimming) with <50mV output deviation per 200mA step. | Use Scenario: Providing regulated +10V and +15V rails for monochrome medical-grade LCDs in portable ultrasound and patient monitors where reliability is critical. IC Role / Device Role / Timing Role: Thermally protected, UVLO-enabled DC/DC converter ensuring uninterrupted bias supply during battery swaps or low-voltage conditions. Use Value: Thermal shutdown at 150°C and 125°C max operating junction temperature ensure safe operation in sealed enclosures with limited airflow. |
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 current, 2.7–12V input, fixed 500kHz/2MHz frequency selection, no VC pin for compensation tuning. | Targets higher-power applications (≥2A out); lacks analog compensation flexibility for custom ESR/output cap optimization. | Choose when needing >2.5A output or simplified layout without external compensation network. |
| MAX17062ETA+ | 2.5A switch, 2.5–5.5V input only, 1.2MHz fixed frequency, integrated soft-start, no UVLO hysteresis. | Restricted to low-input systems (e.g., USB-powered); not suitable for wide-range battery inputs like LM2700LD-ADJ/NOPB. | Choose only for 3.3V/5V fixed-rail designs where input range is guaranteed narrow. |
Compared with TPS61088RHLR and MAX17062ETA+, the LM2700LD-ADJ/NOPB offers superior analog compensation control and wider 2.2–12V input compatibility - making it uniquely suited for battery-powered LCD bias where thermal management, light-load efficiency, and output adjustability are prioritized over raw current capability.
Availability
LM2700LD-ADJ/NOPB is available at Aetrix Electronics and suitable for LCD bias supplies, handheld device power rails, and portable medical display systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LM2700LD-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 delivering analog, embedded processing, and connectivity solutions with emphasis on power management, signal chain, and high-reliability design.
The LM2700 product line was developed specifically for compact, high-efficiency boost conversion in portable display and battery-powered consumer electronics - emphasizing low quiescent current, integrated power switches, and flexible frequency selection.
FAQ
What is the maximum output voltage supported by the LM2700LD-ADJ/NOPB?
The LM2700LD-ADJ/NOPB supports an adjustable output voltage up to 17.5V, set via an external resistor divider connected to the FB pin. Its 1.26V feedback reference and internal 3.6A switch with 18V absolute maximum SW voltage rating enable reliable operation at this upper limit when paired with appropriately rated external components including the Schottky diode and output capacitor.
Does the LM2700LD-ADJ/NOPB require an external compensation network?
Yes, the LM2700LD-ADJ/NOPB requires an external RC/CC network connected to the VC pin to ensure loop stability. This network introduces a pole-zero pair that compensates for the right-half-plane zero inherent in boost topology; recommended values are 5kΩ ≤ RC ≤ 20kΩ and 680pF ≤ CC ≤ 4.7nF, with design validation required for specific output capacitance and load conditions.
How does the FSLCT pin affect switching frequency in the LM2700LD-ADJ/NOPB?
The FSLCT pin on the LM2700LD-ADJ/NOPB selects between two fixed switching frequencies: grounding FSLCT configures 600kHz operation (typical), while connecting it to VIN selects 1.25MHz (typical). This selection directly impacts inductor size, output capacitor ESR requirements, and light-load efficiency - with 600kHz offering lower quiescent current (2.0mA) and 1.25MHz enabling smaller passive components.
Can the LM2700LD-ADJ/NOPB operate with a single-cell Li-ion battery input?
Yes, the LM2700LD-ADJ/NOPB operates across 2.2V–12V input, fully covering the discharge range of a single Li-ion cell (2.7V–4.2V). Its undervoltage lockout activates at ~2.0V, preventing malfunction during deep discharge, and its 2.5A switch current limit supports typical LCD bias loads up to 500mA at 8V - making it ideal for handheld display power.
What is the thermal resistance (θJA) of the LM2700LD-ADJ/NOPB in its WSON package?
The LM2700LD-ADJ/NOPB in the 14-lead WSON (NHE) package has a junction-to-ambient thermal resistance (θJA) of 45°C/W when mounted on a standard JEDEC 2-layer board with adequate copper pour. This value assumes proper soldering of the exposed thermal pad to inner-layer ground planes; inadequate thermal land design may significantly degrade actual thermal performance.
LM2700LD-ADJ/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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-WSON (4x4)
LM2700LD-ADJ/NOPB FAQ
1.How can I place an order for LM2700LD-ADJ/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2700LD-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 LM2700LD-ADJ/NOPB reliable?
The price and inventory of LM2700LD-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 LM2700LD-ADJ/NOPB is usually 5 days.
3.What payment methods are accepted for LM2700LD-ADJ/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2700LD-ADJ/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2700LD-ADJ/NOPB?
LM2700LD-ADJ/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2700LD-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 LM2700LD-ADJ/NOPB?
For technical support, including LM2700LD-ADJ/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2700LD-ADJ/NOPB requirements.
6.How does Aetrix verify that LM2700LD-ADJ/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2700LD-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 LM2700LD-ADJ/NOPB meets industry standards.
7.What is the process for return or replacement of LM2700LD-ADJ/NOPB?
All LM2700LD-ADJ/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2700LD-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 LM2700LD-ADJ/NOPB part is unused and in its original packaging.
Return procedure for LM2700LD-ADJ/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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