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Texas Instruments LM2663MX/NOPB
- Part No.:
- LM2663MX/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2663MX/NOPB.pdf
- Description:
- IC REG CHRG PUMP INV 200MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,547
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Product details
Overview
LM2663MX/NOPB from Texas Instruments is a CMOS switched-capacitor voltage inverter IC that converts 2.5 V–5.5 V positive input to corresponding negative output with up to 200 mA load capability, 3.5 Ω typical output resistance, and 86% conversion efficiency at full load-used in portable medical instruments and op-amp dual-rail power supplies.
For engineers reviewing the LM2663MX/NOPB datasheet, LM2663MX/NOPB pinout, LM2663MX/NOPB application, or LM2663MX/NOPB equivalent, key selection criteria include shutdown current (10 μA), fixed 150 kHz oscillator frequency, SOIC-8 package compatibility, and absence of external clock drive capability in doubler mode.
Technical Context
The LM2663MX/NOPB implements a four-switch charge-pump topology with internal MOSFETs operating at half the oscillator frequency (75 kHz switching), delivering inverted output via two external flying/output capacitors. Its LV pin must be tied to OUT in voltage-doubling configuration and to GND in inverting mode below 3.5 V input.
Unlike the LM2662, the LM2663MX/NOPB replaces the FC pin with an SD pin enabling 10 μA shutdown current; OSC pin supports external capacitor-based frequency reduction but not external clock drive in any mode. Output resistance is dominated by switch RON, capacitor ESR, and oscillator frequency per equation ROUT ≈ RSW + 4×ESRC1 + ESRC2 + 2/(fOSC×C1).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5 V to 5.5 V - supports single-cell Li-ion and dual-cell alkaline battery systems without LDO pre-regulation. |
| Oscillator Frequency | 150 kHz fixed - enables use of smaller 10–47 μF ceramic flying capacitors while maintaining <7 Ω output resistance at 200 mA. |
| Output Current | 200 mA maximum - sufficient for biasing dual op-amps, RS-232 transceivers, or LCD contrast supplies. |
| Output Resistance | 3.5 Ω typical at 200 mA - determines voltage droop under load; combined with 47 μF/0.2 Ω ESR caps yields ~0.7 V drop at full load. |
| Shutdown Current | 10 μA - reduces system standby power in handheld instruments during sleep mode without external circuitry. |
| Conversion Efficiency | 86% at 200 mA - exceeds inductor-based solutions in EMI-sensitive environments while avoiding magnetics cost and size. |
| Package | SOIC-8 (4.90 mm × 3.91 mm) - industry-standard footprint compatible with automated SMT assembly and thermal relief pads. |
Pinout & Package
LM2663MX/NOPB is housed in an 8-pin SOIC (D) package with 1.27 mm pitch, 4.90 mm × 3.91 mm body size, and exposed pad not present. Thermal resistance is 170°C/W junction-to-ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SD) | Shutdown control input | Logic-high (>2 V) disables internal oscillator and reduces quiescent current to 10 μA; tie to GND for normal operation. |
| 2 (CAP+) | Flying capacitor positive terminal | Connects to + terminal of external 10–47 μF flying capacitor (C1); carries bidirectional 400 mA peak switching current. |
| 3 (GND) | Power ground reference | Primary return path for input supply, flying capacitor discharge, and output load; must be low-inductance connection. |
| 4 (CAP−) | Flying capacitor negative terminal | Connects to − terminal of C1; forms charge-transfer node with CAP+ during pump cycle; shares GND return path. |
| 5 (OUT) | Negative voltage output | Delivers inverted output (−VIN) to load; requires low-ESR output capacitor (C2) between OUT and GND for ripple suppression. |
| 6 (LV) | Low-voltage operation control | Must be tied to OUT in all configurations - enables internal regulator bypass for optimal performance across full input range. |
| 7 (OSC) | Oscillator timing node | Internal 15 pF capacitor; connect external cap to GND to reduce frequency; no external clock drive support in any mode. |
| 8 (V+) | Positive supply input | Accepts 2.5–5.5 V input; supplies internal logic and switch drivers; requires local 1 μF ceramic bypass to GND. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated shutdown control | SD pin reduces supply current to 10 μA - eliminates need for external enable FET or power-gating logic in battery-critical designs. |
| Fixed 150 kHz oscillator | Enables compact 10–47 μF ceramic flying capacitors - avoids bulkier tantalum or electrolytic caps required at lower frequencies. |
| No external clock drive support | Prevents unintended mode switching or timing conflicts in synchronized systems - ensures deterministic operation without clock domain crossing. |
| LV pin tied to OUT | Removes input voltage dependency on LV state - simplifies PCB layout and eliminates risk of misconnection in voltage-doubling mode. |
| SOIC-8 thermal performance | 170°C/W RθJA allows 200 mA continuous operation at 85°C ambient with standard copper pour - no heatsink required. |
Applications
| Portable Medical Instrument Power | Op-Amp Dual-Rail Supply |
|---|---|
|
Use Scenario: Generating isolated negative rail for analog front-end amplifiers in handheld ECG or glucose meters powered by single 3.7 V Li-ion cells. IC Role / Device Role / Timing Role: Voltage inverter providing stable −3.7 V rail from 3.7 V input, synchronized to internal 150 kHz oscillator for predictable ripple frequency. Use Value: Eliminates inductor-based DC/DC converters, reducing EMI interference with sensitive analog signal paths and saving board space. |
Use Scenario: Biasing rail-to-rail op-amps requiring symmetric ±3.3 V supplies from a single 3.3 V source in portable test equipment. IC Role / Device Role / Timing Role: Inverting converter generating −3.3 V output; LV pin tied to OUT ensures regulation stability across temperature and load variations. Use Value: Achieves <1% output voltage error at 100 mA load using 47 μF/0.2 Ω ESR capacitors - sufficient for 12-bit precision signal conditioning. |
| RS-232 Transceiver Bias | Handheld Instrument LCD Contrast |
|
Use Scenario: Providing −5 V bias for MAX232-compatible RS-232 level shifters in ruggedized field data loggers with 5 V main rail. IC Role / Device Role / Timing Role: Inverter operating at 150 kHz to minimize output capacitor size; SD pin controlled by microcontroller GPIO for dynamic power management. Use Value: Delivers 15 mA at −5 V with <50 mV ripple using 22 μF X7R ceramics - meets TIA-232 voltage compliance with zero inductor count. |
Use Scenario: Adjusting LCD segment contrast voltage in battery-powered multimeters where display brightness must scale with battery voltage decay. IC Role / Device Role / Timing Role: Inverter configured with programmable SD pin to disable contrast supply during measurement idle periods. Use Value: Reduces average system current by 0.3 mA during 90% duty-cycle sleep - extends AA battery life by >200 hours in typical usage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage inverter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2662MX/NOPB | 20/150 kHz selectable oscillator via FC pin; no shutdown function; 0.3–1.3 mA operating current depending on frequency. | Lacks 10 μA shutdown mode; requires FC pin routing and may increase EMI in noise-sensitive layouts due to optional 20 kHz mode. | Select when oscillator flexibility or legacy LM2662 design reuse is required; avoid if ultra-low standby power is mandatory. |
| MAX680ESA+ | True 200 mA inverter with 100 kHz fixed oscillator; 125 μA quiescent current; no shutdown pin; requires 100 μF minimum flying cap. | Higher quiescent current limits battery runtime; larger capacitor footprint increases board area; no SD pin for software-controlled disable. | Choose for proven reliability in industrial temperature range (−40°C to +85°C); not recommended for sub-10 μA standby designs. |
Compared with LM2663MX/NOPB, LM2662MX/NOPB trades shutdown capability for oscillator configurability, while MAX680ESA+ offers higher temperature rating but sacrifices standby efficiency and capacitor size optimization - making LM2663MX/NOPB optimal for portable devices prioritizing battery life and compactness.
Availability
LM2663MX/NOPB is available at Aetrix Electronics and suitable for portable medical instruments, handheld test equipment, RS-232 interface power, and op-amp dual-rail supply designs requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for LM2663MX/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 company headquartered in Dallas, Texas, designing and manufacturing analog ICs, embedded processors, and digital signal processors for industrial, automotive, and consumer markets.
The LM266x series was developed specifically for low-noise, inductorless voltage inversion and doubling in space-constrained, battery-powered systems - emphasizing efficiency, small footprint, and ease of use with minimal external components.
FAQ
What is the minimum input voltage supported by LM2663MX/NOPB?
The LM2663MX/NOPB operates down to 2.5 V input voltage in inverting mode, as specified in the Recommended Operating Conditions table. Below this threshold, output regulation degrades and startup may fail - it is not rated for 1.5 V operation like the LM2662 variant. Always verify V+ ≥ 2.5 V in final design validation.
Can LM2663MX/NOPB be used as a positive voltage doubler?
Yes, LM2663MX/NOPB supports positive voltage doubling by reconfiguring connections: apply input to GND pin, use V+ as output, tie LV and OUT to GND, and ensure OSC is left open. Unloaded output equals 2×VIN, but note OSC cannot accept external clock drive in this mode per datasheet Section 8.3.1.
What is the purpose of the LV pin on LM2663MX/NOPB?
On LM2663MX/NOPB, the LV pin must be tied directly to the OUT pin in all configurations - unlike the LM2662, it has no low-voltage bypass function. This connection enables internal regulator operation across the full 2.5–5.5 V input range and is mandatory for stable inverting or doubling behavior.
Does LM2663MX/NOPB support external clock synchronization?
No, LM2663MX/NOPB does not support external clock drive on the OSC pin in any mode. The datasheet explicitly states "OSC cannot be driven by an external clock" for the LM2663 (Section 8.3.1). Only the LM2662 variant permits external clock input for oscillator synchronization.
What is the maximum continuous output current for LM2663MX/NOPB?
The LM2663MX/NOPB delivers up to 200 mA continuous output current under recommended operating conditions (TA ≤ 85°C, SOIC-8 package, proper PCB copper pour). Exceeding this limit risks thermal shutdown or reduced efficiency - derate linearly above 85°C ambient per the 170°C/W thermal resistance specification.
LM2663MX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Ratiometric
- Output Configuration:
- Positive or Negative
- Topology:
- Charge Pump
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- -Vin, 2Vin, Vin/2
- Voltage - Output (Max):
- -
- Current - Output:
- 200mA
- Frequency - Switching:
- 10kHz, 75kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LM2663MX/NOPB FAQ
1.How can I place an order for LM2663MX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2663MX/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 LM2663MX/NOPB reliable?
The price and inventory of LM2663MX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2663MX/NOPB is usually 5 days.
3.What payment methods are accepted for LM2663MX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2663MX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2663MX/NOPB?
LM2663MX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2663MX/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 LM2663MX/NOPB?
For technical support, including LM2663MX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2663MX/NOPB requirements.
6.How does Aetrix verify that LM2663MX/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2663MX/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 LM2663MX/NOPB meets industry standards.
7.What is the process for return or replacement of LM2663MX/NOPB?
All LM2663MX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2663MX/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 LM2663MX/NOPB part is unused and in its original packaging.
Return procedure for LM2663MX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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