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Texas Instruments LM2750LDX-ADJ/NOPB
- Part No.:
- LM2750LDX-ADJ/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LM2750LDX-ADJ/NOPB.pdf
- Description:
- IC REG CHARGE PUMP ADJ 1 10WSON
- Quantity:
- Payment:
- Shipping:
Inventory:2,143
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Product details
Overview
LM2750LDX-ADJ/NOPB from Texas Instruments is a regulated switched-capacitor boost regulator in a 10-pin WSON (3mm × 3mm) package, delivering adjustable 3.8V–5.2V output with up to 120mA load current at VIN ≥ 2.9V, 40mA at VIN ≥ 2.7V, and fixed 1.7MHz switching for low-noise power in space-constrained Li-ion–powered devices such as SIM card supplies and audio amplifier rails.
For engineers reviewing the LM2750LDX-ADJ/NOPB datasheet, LM2750LDX-ADJ/NOPB pinout, LM2750LDX-ADJ/NOPB application, or LM2750LDX-ADJ/NOPB equivalent, key selection criteria include feedback-based output adjustability, pre-regulated input current ripple suppression, thermal shutdown at 150°C, and compatibility with only three external ceramic capacitors (CIN/COUT/CFLY).
Technical Context
The LM2750LDX-ADJ/NOPB implements pre-regulation via modulated on-resistance of input-connected pass-transistor switches before voltage doubling, eliminating typical input current ripple of switched-capacitor doublers. Its internal 1.7MHz non-overlapping clock drives two-phase charge-pump operation using an external flying capacitor (CFLY).
Output regulation is achieved through a feedback loop monitoring FB pin voltage (1.232V typ.), enabling programmable VOUT = 1.23V × (1 + R1/R2). Thermal shutdown engages at TJ = 150°C (typ.) and releases at 135°C (typ.), while overcurrent protection limits output to 300mA (typ.) during short-circuit events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage Range | 3.8V to 5.2V, set by external R1/R2 divider; enables precise rail matching for analog/audio subsystems |
| Input Voltage Range | 2.7V to 5.6V; supports full Li-ion discharge curve (2.7V–4.2V) without external pre-buck stage |
| Max Output Current | 120mA at VIN ≥ 2.9V; sufficient for white LED biasing or low-power RF ICs without thermal derating |
| Switching Frequency | 1.7MHz fixed; enables use of small 1µF ceramic CFLY and <15mVp-p ripple with 2.2µF COUT at 100mA |
| Feedback Reference | 1.232V ± 3% at FB pin; defines regulation accuracy and sets minimum R1+R2 = 15kΩ for stable loop response |
| Shutdown Current | <2µA; preserves battery life in standby mode for portable instrumentation and wearables |
| Junction Temp Range | −40°C to +125°C; validated for automotive cabin and industrial control environments |
Pinout & Package
LM2750LDX-ADJ/NOPB uses a thermally enhanced 10-pin WSON package (3mm × 3mm, package code NGY0010A/DSC0010A) with exposed die-attach pad (DAP) for PCB-level heat sinking. Pin 3 functions as FB (feedback) for adjustable output variants - distinct from LM2750-5.0's GND connection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | VOUT | Regulated output node; dual pins reduce IR drop and improve current sharing for 120mA loads |
| 3 | FB | Feedback input; connects to resistor divider to set VOUT = 1.23V × (1 + R1/R2); high-impedance (1nA max) |
| 4 | SD | Active-low shutdown; internal 200kΩ pull-down ensures safe default-off state when floating |
| 5, 6, DAP | GND | Power/thermal ground; DAP must be soldered to large copper pour with multiple vias for θJA = 55°C/W |
| 7 | CAP− | Flying capacitor negative terminal; connects to CFLY (1µF ceramic) during φ1 charge phase |
| 8, 9 | VIN | Input supply; dual pins minimize trace inductance and support high-frequency decoupling near CIN |
| 10 | CAP+ | Flying capacitor positive terminal; forms charge-transfer path with CAP− during φ2 pump phase |
Key Features
| Feature | Design Value |
|---|---|
| Inductorless architecture | Eliminates EMI-prone magnetics and reduces BOM to only 3 MLCCs (CIN/COUT/CFLY), cutting solution size by >40% vs. inductive boosters |
| Pre-regulation topology | Reduces input current ripple to negligible levels, preserving noise-sensitive analog rails (e.g., ADC references) without extra filtering |
| Tightly controlled soft-start | 500µs typical VOUT ramp prevents inrush into downstream capacitance, avoiding brownout in multi-rail systems |
| Thermal & current protection | Auto-shutdown at 150°C junction temp and 300mA short-circuit limit prevent damage during transient overload or poor PCB layout |
| Low-noise 1.7MHz operation | Enables use of small 1µF CFLY and yields <4mVp-p ripple with 10µF COUT, meeting audio amplifier PSRR requirements |
Applications
| Cellular Phone SIM Card Power | Audio Amplifier Bias Supply |
|---|---|
Use Scenario: Powers 3V/5V SIM interface circuitry from single Li-ion cell (2.7V–4.2V). IC Role / Device Role / Timing Role: Adjustable boost regulator providing stable 3.3V or 5V rail with <2µA shutdown current. Use Value: Eliminates need for discrete LDO post-regulator; maintains regulation across full battery discharge without efficiency penalty. |
Use Scenario: Supplies clean ±5V bias to Class AB headphone amplifiers in portable media players. IC Role / Device Role / Timing Role: Low-ripple switched-capacitor booster replacing noisy inductive DC/DC converters. Use Value: Achieves <4mVp-p output ripple with 2.2µF COUT, directly meeting THD+N <0.01% requirements. |
| White LED Backlight Driver | Li-ion to 5V General-Purpose Conversion |
Use Scenario: Drives 3–5串联 white LEDs (VF ≈ 3.2V each) in compact displays. IC Role / Device Role / Timing Role: Efficient 3.8V–5.2V adjustable booster delivering up to 120mA with thermal foldback. Use Value: Delivers 85% peak efficiency at 100mA, minimizing heat in sealed display enclosures. |
Use Scenario: Generates 5V system rail from Li-ion battery for MCU peripherals and USB interfaces. IC Role / Device Role / Timing Role: Compact, low-noise alternative to inductor-based boost ICs in space-limited IoT nodes. Use Value: Reduces bill-of-materials to three 0805 MLCCs and eliminates EMI filter components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar switched-capacitor boost regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2750LDX-5.0/NOPB | Fixed 5.0V output; FB pin replaced with GND; identical package, pinout, and efficiency specs | Not suitable for variable-voltage rails; eliminates R1/R2 design effort but lacks flexibility | Select when 5.0V ±4% is sufficient and board space for feedback resistors is constrained |
| MAX682EUT+T | Fixed 5.0V output; 1MHz switching; requires larger CFLY (2.2µF); no thermal shutdown | Limited to lower-current apps (<50mA); higher ripple; unsuitable for thermally demanding layouts | Consider only for cost-sensitive, low-power designs where thermal margin exceeds 30°C |
Compared with LM2750LDX-ADJ/NOPB, the LM2750LDX-5.0/NOPB removes design flexibility but simplifies layout, while MAX682EUT+T trades efficiency and protection for lower unit cost - making LM2750LDX-ADJ/NOPB optimal for thermally dense, adjustable-rail applications requiring robustness.
Availability
LM2750LDX-ADJ/NOPB is available at Aetrix Electronics and suitable for cellular SIM power, audio amplifier biasing, white LED backlighting, and Li-ion–to–5V conversion requiring stable component supply across production lifecycles.
Supply support for LM2750LDX-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-efficiency power conversion ICs.
The LM2750 product line delivers ultra-compact, low-noise switched-capacitor boost solutions for battery-powered portable electronics where inductor-free design and minimal EMI are critical.
FAQ
What output voltage range does the LM2750LDX-ADJ/NOPB support, and how is it set?
The LM2750LDX-ADJ/NOPB supports an output voltage range of 3.8V to 5.2V, set externally using a resistor divider connected to the FB pin. The relationship is VOUT = 1.23V × (1 + R1/R2), with recommended R1 + R2 between 15kΩ and 20kΩ. This allows precise rail tuning for analog sensors or mixed-signal ICs without redesigning the power stage. The LM2750LDX-ADJ/NOPB's feedback reference voltage is tightly specified at 1.232V ± 3%, ensuring consistent regulation across temperature and load.
Can the LM2750LDX-ADJ/NOPB operate from a 2.7V input, and what is its maximum output current at that voltage?
Yes, the LM2750LDX-ADJ/NOPB operates down to 2.7V input, but maximum output current is limited to 40mA in that range (2.7V ≤ VIN ≤ 2.9V). Above 2.9V, it delivers up to 120mA. This stepped current capability aligns with Li-ion battery discharge profiles, maintaining usable output even at end-of-life voltage. The LM2750LDX-ADJ/NOPB achieves this via pre-regulation architecture, which sustains regulation without efficiency collapse at low VIN - unlike basic charge pumps.
What are the required external capacitors for the LM2750LDX-ADJ/NOPB, and why must they be ceramic?
The LM2750LDX-ADJ/NOPB requires three external ceramic capacitors: CIN (≥2.2µF), COUT (≥2.2µF), and CFLY (≥1.0µF), all low-ESR MLCCs (e.g., X7R/X5R). Ceramic types are mandatory because their ESR (<10mΩ) minimizes output ripple and avoids instability - tantalum or electrolytic capacitors introduce excessive ESR (>100mΩ), degrading regulation and risking oscillation. The LM2750LDX-ADJ/NOPB's 1.7MHz switching frequency further mandates low-impedance ceramics to maintain efficiency and noise performance.
How does the LM2750LDX-ADJ/NOPB suppress input current ripple, and why is this important?
The LM2750LDX-ADJ/NOPB suppresses input current ripple via pre-regulation: it modulates the on-resistance of input-connected switches *before* voltage doubling, preventing the pulsed current draw typical of standard charge pumps. This keeps the VIN line virtually noise-free - critical for powering noise-sensitive circuits like ADCs, RF transceivers, or precision op-amps from the same battery rail. The LM2750LDX-ADJ/NOPB achieves this without additional filters, reducing component count and board area versus inductive alternatives.
Does the LM2750LDX-ADJ/NOPB include protection features, and how do they function?
Yes, the LM2750LDX-ADJ/NOPB integrates thermal shutdown (engages at TJ = 150°C, releases at 135°C) and output current limiting (300mA typ. during short-circuit). These features protect both the IC and downstream circuitry: thermal shutdown prevents permanent damage under sustained overload or poor heatsinking, while current limiting avoids destructive power dissipation during faults. The LM2750LDX-ADJ/NOPB also includes soft-start (500µs VOUT ramp) to limit inrush, and an active-low SD pin with internal 200kΩ pull-down for fail-safe shutdown control.
LM2750LDX-ADJ/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Charge Pump
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.6V
- Voltage - Output (Min/Fixed):
- 3.8V
- Voltage - Output (Max):
- 5.2V
- Current - Output:
- 120mA
- Frequency - Switching:
- 1.7MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-WSON (3x3)
LM2750LDX-ADJ/NOPB FAQ
1.How can I place an order for LM2750LDX-ADJ/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2750LDX-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 LM2750LDX-ADJ/NOPB reliable?
The price and inventory of LM2750LDX-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 LM2750LDX-ADJ/NOPB is usually 5 days.
3.What payment methods are accepted for LM2750LDX-ADJ/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2750LDX-ADJ/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2750LDX-ADJ/NOPB?
LM2750LDX-ADJ/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2750LDX-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 LM2750LDX-ADJ/NOPB?
For technical support, including LM2750LDX-ADJ/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2750LDX-ADJ/NOPB requirements.
6.How does Aetrix verify that LM2750LDX-ADJ/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2750LDX-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 LM2750LDX-ADJ/NOPB meets industry standards.
7.What is the process for return or replacement of LM2750LDX-ADJ/NOPB?
All LM2750LDX-ADJ/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2750LDX-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 LM2750LDX-ADJ/NOPB part is unused and in its original packaging.
Return procedure for LM2750LDX-ADJ/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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