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Texas Instruments LM2750LD-ADJ/NOPB
- Part No.:
- LM2750LD-ADJ/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LM2750LD-ADJ/NOPB.pdf
- Description:
- IC REG CHARGE PUMP ADJ 1 10WSON
- Quantity:
- Payment:
- Shipping:
Inventory:7,510
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Product details
Overview
LM2750LD-ADJ/NOPB from Texas Instruments is a regulated switched-capacitor boost regulator delivering adjustable 3.8 V to 5.2 V output from 2.7 V–5.6 V input, supporting up to 120 mA at VIN ≥ 2.9 V. It uses no inductor, operates at fixed 1.7 MHz, achieves 85% peak efficiency, and features pre-regulation to minimize input ripple - ideal for space-constrained Li-ion-powered LED lighting and audio amplifiers.
For engineers reviewing the LM2750LD-ADJ/NOPB datasheet, LM2750LD-ADJ/NOPB pinout, LM2750LD-ADJ/NOPB application, or LM2750LD-ADJ/NOPB equivalent, key selection criteria include its adjustable feedback architecture (VFB = 1.232 V), shutdown current <2 µA, ±4% output regulation, thermal shutdown at 150°C, and WSON-10 package with exposed DAP for enhanced thermal performance.
Technical Context
The LM2750LD-ADJ/NOPB implements pre-regulation via modulated on-resistance of input-connected pass-transistor switches before voltage doubling, suppressing input current ripple and preserving battery line integrity. Its two-phase non-overlapping clock drives external flying capacitor (CFLY) switching between charge (φ1) and pump (φ2) phases to generate regulated output.
Output voltage is set by an external resistor divider on FB pin (Pin 3), with VFB = 1.232 V (typ) and R1+R2 constrained to 15 kΩ–20 kΩ. Internal soft-start limits inrush current with 500 µs typical VOUT ramp time, while overcurrent protection limits output to 300 mA and thermal shutdown engages at TJ = 150°C (typ).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage Range | 3.8 V to 5.2 V, set externally via FB pin resistor divider |
| Input Voltage Range | 2.7 V to 5.6 V; supports full 120 mA output only when VIN ≥ 2.9 V |
| Max Output Current | 120 mA (VIN ≥ 2.9 V); drops to 40 mA at VIN = 2.7 V–2.9 V |
| Switching Frequency | 1.7 MHz fixed - enables small ceramic capacitors and low output ripple |
| Feedback Voltage | 1.232 V (typ) at FB pin - defines precision reference for adjustable output |
| Shutdown Current | <2 µA - enables ultra-low-power battery standby modes |
| Output Ripple | 15 mVP-P at 100 mA with 2.2 µF COUT - meets low-noise analog supply requirements |
| Junction Temp Limit | 125°C max operating; thermal shutdown at 150°C (typ) prevents damage |
Pinout & Package
LM2750LD-ADJ/NOPB uses a 3.00 mm × 3.00 mm WSON-10 package with exposed die-attach pad (DAP) for thermal dissipation. Pin numbering follows TI's NGY/DSC standard top-view layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT (Pins 1, 2) | Regulated output voltage node | Must be connected externally; dual pins reduce trace resistance and improve current handling |
| VIN (Pins 8, 9) | Main input power supply | Dual-input configuration lowers impedance and improves noise immunity; requires local 2.2 µF CIN |
| GND (Pins 5, 6) | Signal and power ground reference | Low-impedance PCB copper fill + vias to internal ground plane required for stability |
| FB (Pin 3) | Feedback input for adjustable output | Connects to resistor divider; sets VOUT = 1.232 V × (1 + R1/R2); replaces GND on LM2750-5.0 |
| SD (Pin 4) | Active-low shutdown control | Pulled low internally via 200 kΩ resistor; logic-low ≤0.4 V disables regulator and cuts supply current to <2 µA |
| CAP+ (Pin 10) | Flying capacitor positive terminal | Connects to C+ of 1 µF CFLY; critical path for charge transfer; must be routed short and direct |
| CAP− (Pin 7) | Flying capacitor negative terminal | Connects to C− of 1 µF CFLY; forms pumping loop with CAP+; shares ground return with GND pins |
| DAP (Exposed Pad) | Thermal and electrical ground | Must be soldered to ≥100 mm² copper pour with ≥4 thermal vias to inner ground layers for RθJB = 21.5°C/W |
Key Features
| Feature | Design Value |
|---|---|
| Inductorless architecture | Eliminates magnetic components - reduces BOM cost, board area, and EMI risk in portable designs |
| Pre-regulation topology | Minimizes input current ripple, keeping VIN line virtually noise-free for sensitive analog circuits |
| Fixed 1.7-MHz switching | Enables use of tiny 1 µF/2.2 µF MLCCs (TDK C1608X5R1A105K/C2012X7R1A225K) without ferrite beads |
| Tightly controlled soft-start | 500 µs typical VOUT ramp prevents inrush into downstream capacitance - avoids brownout in shared rails |
| Integrated protection | 300 mA current limit + thermal shutdown (150°C) + output disconnect during shutdown prevent system faults |
| WSON-10 thermal design | RθJB = 21.5°C/W allows full 120 mA operation without derating when PCB layout follows TI guidelines |
Applications
| White LED Backlighting | Cellular SIM Card Power |
|---|---|
|
Use Scenario: Driving 3–5 white LEDs in handheld barcode scanners or POS terminals with single-cell Li-ion input. IC Role / Device Role / Timing Role: Boost regulator providing stable 5 V rail; pre-regulation preserves battery voltage integrity for RF and baseband ICs. Use Value: Delivers 120 mA at >85% peak efficiency with <15 mVP-P ripple - eliminates need for post-LDO filtering and saves PCB area. |
Use Scenario: Supplying 5 V to legacy SIM card interfaces in smartphones and IoT modules where input drops to 2.7 V. IC Role / Device Role / Timing Role: Adjustable-output voltage regulator enabling compatibility with varying SIM card voltage specs (3.3 V–5 V). Use Value: Maintains regulation down to 2.7 V input (40 mA) and supports precise 3.8–5.2 V output via FB divider - ensures interoperability across global SIM standards. |
| Audio Amplifier Bias Rail | Industrial Handheld Radio Core Supply |
|
Use Scenario: Generating clean 5 V bias for Class AB headphone amplifiers in portable media players. IC Role / Device Role / Timing Role: Low-noise switched-capacitor booster replacing inductive DC/DC to avoid magnetic coupling into audio signal paths. Use Value: 1.7 MHz fixed frequency places switching noise beyond audio band; 4 mVP-P ripple at 10 µF COUT meets THD+N requirements without LC filtering. |
Use Scenario: Powering microcontroller, display, and transceiver subsystems in ruggedized two-way radios operating from depleted Li-ion cells. IC Role / Device Role / Timing Role: Primary 5 V system rail generator with shutdown control for deep-sleep mode and thermal resilience in high-temp enclosures. Use Value: <2 µA shutdown current extends battery life; thermal shutdown at 150°C + WSON-10 DAP enable reliable operation in 85°C ambient environments. |
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 |
|---|---|---|---|
| TPS60403DBVR | Fixed 5 V output only; 60 mA max IOUT; 1.2 MHz switching; no FB pin | Lacks adjustable output and higher current capability - suitable only for low-power fixed-rail loads | Select when output voltage is fixed and load current ≤60 mA; not a functional replacement for LM2750LD-ADJ/NOPB's adjustability or 120 mA capability |
| MAX889TEUK+T | Adjustable 2.5–5.5 V output; 100 mA max IOUT; 1.1 MHz; different pinout and capacitor requirements | Lower max current and different thermal profile - requires layout redesign and capacitor requalification | Consider for footprint-constrained designs needing similar adjustability but accepting 20 mA lower output current and reduced thermal margin |
Compared with TPS60403DBVR and MAX889TEUK+T, LM2750LD-ADJ/NOPB uniquely combines 120 mA output, 1.7 MHz low-noise operation, pre-regulation for clean input lines, and WSON-10 thermal performance - making it optimal for high-density, battery-sensitive applications requiring both flexibility and robustness.
Availability
LM2750LD-ADJ/NOPB is available at Aetrix Electronics and suitable for white LED backlighting, cellular SIM card power, audio amplifier bias rails, industrial handheld radio core supplies, and EPOS barcode scanner systems requiring stable component supply across production lifecycles.
Supply support for LM2750LD-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 family was designed specifically for compact, battery-powered systems needing clean, inductorless voltage boosting - targeting portable consumer, industrial, and communications equipment where size, noise, and thermal constraints dominate.
FAQ
What is the minimum input voltage required for LM2750LD-ADJ/NOPB to deliver 120 mA output current?
The LM2750LD-ADJ/NOPB requires VIN ≥ 2.9 V to sustain 120 mA output current. Below 2.9 V - down to 2.7 V - maximum output current drops to 40 mA per the datasheet's recommended operating conditions. This behavior stems from internal pre-regulation headroom limitations and is verified across temperature and process corners.
How do I configure the output voltage of LM2750LD-ADJ/NOPB for 4.5 V?
To set LM2750LD-ADJ/NOPB output to 4.5 V, connect a resistor divider from VOUT to FB (Pin 3) to GND, using VOUT = 1.232 V × (1 + R1/R2). For 4.5 V, R1/R2 ≈ 2.65; select R1 = 158 kΩ and R2 = 60 kΩ (sum = 218 kΩ), then parallel a 10 pF capacitor across R1 per datasheet guidance to ensure loop stability.
Does LM2750LD-ADJ/NOPB require external compensation components?
No, LM2750LD-ADJ/NOPB is internally compensated and requires no external compensation network. Its feedback loop is optimized for standard ceramic capacitor values (CIN = 2.2 µF, COUT = 2.2 µF, CFLY = 1 µF) and does not support external frequency or phase adjustment - simplifying design and reducing bill-of-materials count.
Can LM2750LD-ADJ/NOPB be used with input voltages above 5.6 V?
No - absolute maximum VIN rating for LM2750LD-ADJ/NOPB is 6 V, but recommended operating maximum is 5.6 V. Exceeding 5.6 V risks permanent damage per Absolute Maximum Ratings (Section 6.1). For higher input applications, consider input clamping or pre-regulation stages upstream of LM2750LD-ADJ/NOPB.
What is the purpose of the DAP (exposed pad) on LM2750LD-ADJ/NOPB, and how should it be connected?
The DAP on LM2750LD-ADJ/NOPB serves as both thermal conduction path and electrical ground connection. It must be soldered to a dedicated PCB copper pour tied to system ground via ≥4 thermal vias (0.3 mm diameter) to an internal ground plane - achieving RθJB = 21.5°C/W and preventing thermal shutdown under full 120 mA load.
LM2750LD-ADJ/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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)
LM2750LD-ADJ/NOPB FAQ
1.How can I place an order for LM2750LD-ADJ/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2750LD-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 LM2750LD-ADJ/NOPB reliable?
The price and inventory of LM2750LD-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 LM2750LD-ADJ/NOPB is usually 5 days.
3.What payment methods are accepted for LM2750LD-ADJ/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2750LD-ADJ/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2750LD-ADJ/NOPB?
LM2750LD-ADJ/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2750LD-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 LM2750LD-ADJ/NOPB?
For technical support, including LM2750LD-ADJ/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2750LD-ADJ/NOPB requirements.
6.How does Aetrix verify that LM2750LD-ADJ/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2750LD-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 LM2750LD-ADJ/NOPB meets industry standards.
7.What is the process for return or replacement of LM2750LD-ADJ/NOPB?
All LM2750LD-ADJ/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2750LD-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 LM2750LD-ADJ/NOPB part is unused and in its original packaging.
Return procedure for LM2750LD-ADJ/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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