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Texas Instruments LM2663MX
- Part No.:
- LM2663MX
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2663MX.pdf
- Description:
- IC REG CHRG PUMP INV 200MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,033
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Product details
Overview
LM2663MX 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 handheld test equipment requiring compact, inductorless dual-rail supplies.
For engineers reviewing the LM2663MX datasheet, LM2663MX pinout, LM2663MX application, or LM2663MX equivalent, key selection criteria include its fixed 150 kHz oscillator frequency, shutdown current of 10 μA, LV pin tied to OUT in inverter mode, and SOIC-8 package compatibility with space-constrained battery-powered designs.
Technical Context
The LM2663MX implements a four-switch charge-pump topology with internal CMOS switches driven by a fixed 150 kHz oscillator. It operates exclusively in inverting mode when LV is connected to OUT, and requires two external flying/output capacitors for energy transfer without magnetic components.
Its shutdown functionality is controlled via the SD pin: ≥2 V disables operation and reduces quiescent current to 10 μA, while grounding SD enables normal operation. Unlike the LM2662, it lacks frequency-selectable FC logic and does not support external clock driving of the OSC pin in any mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5 V to 5.5 V - supports Li-ion, 3.3 V, and 5 V rail systems without level-shifting |
| Output Current | 200 mA - sufficient for op-amp biasing, sensor signal conditioning, and low-power analog circuitry |
| Oscillator Frequency | 150 kHz (fixed) - enables use of smaller 47 μF ceramic flying capacitors vs. lower-frequency alternatives |
| Output Resistance | 3.5 Ω (typ) - determines voltage droop under load; impacts regulation in precision analog stages |
| Shutdown Current | 10 μA - extends battery life in sleep-mode portable instrumentation |
| Conversion Efficiency | 86% at 200 mA - balances power loss and thermal rise in sealed enclosures |
| Package | SOIC-8 (4.90 mm × 3.91 mm) - surface-mount compatible with standard reflow profiles and automated assembly |
Pinout & Package
LM2663MX is housed in an 8-pin SOIC (D) package with 1.27 mm pitch, JEDEC MS-012AC compliant, and rated for −40°C to +85°C ambient operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SD) | Shutdown control input | High (>2 V) disables internal oscillator and reduces IQ to 10 μA; grounded for active operation |
| 2 (CAP+) | Flying capacitor positive terminal | Connects to + side of external 47 μF flying capacitor (C1); carries bidirectional switching current |
| 3 (GND) | Power ground reference | Common return for input supply, output load, and internal switch array; must be low-inductance |
| 4 (CAP−) | Flying capacitor negative terminal | Connects to − side of C1; forms charge-transfer path with CAP+ during pump cycles |
| 5 (OUT) | Negative voltage output | Delivers inverted output (−VIN) to load; connects to cathode of output capacitor C2 |
| 6 (LV) | Low-voltage operation control | Must be tied to OUT in inverter mode to enable proper internal regulator biasing |
| 7 (OSC) | Oscillator control node | Internally biased at 150 kHz; external capacitor lowers frequency; no external clock support |
| 8 (V+) | Positive supply input | Accepts 2.5–5.5 V input; powers internal logic and switch drivers; bypass with 0.1 μF ceramic |
Key Features
| Feature | Design Value |
|---|---|
| Inductorless voltage inversion | Eliminates EMI, size, and cost penalties of magnetic-based DC/DC converters in portable designs |
| 10 μA shutdown current | Enables multi-week standby in battery-powered handheld instruments without manual power cycling |
| Fixed 150 kHz switching | Optimizes capacitor size vs. ripple trade-off: 47 μF ceramics suffice for <50 mVpp ripple at 200 mA |
| LV-to-OUT connection requirement | Ensures stable internal biasing across full input range; prevents startup failure below 3.5 V |
| SOIC-8 thermal performance | RθJA = 170°C/W allows 200 mA operation at ≤65°C ambient without heatsinking |
Applications
| Portable Medical Sensors | Handheld Test Equipment |
|---|---|
|
Use Scenario: Powering dual-supply instrumentation amplifiers in battery-operated ECG front-ends. IC Role / Device Role / Timing Role: Generates clean −3.3 V rail from 3.3 V main supply to bias op-amps with rail-to-rail input common-mode range. Use Value: 3.5 Ω output resistance limits voltage droop to <700 mV at 200 mA, preserving amplifier PSRR and offset stability. |
Use Scenario: Providing negative bias for LCD contrast control and analog multiplexer switches in field multimeters. IC Role / Device Role / Timing Role: Inverts 5 V system rail to −5 V using two 47 μF X7R ceramics; SD pin synchronized to measurement cycle. Use Value: 10 μA shutdown current extends 2xAA alkaline battery life to >12 months in intermittent-use mode. |
| Laptop Peripheral Interfaces | Industrial Data Acquisition Modules |
|
Use Scenario: Supplying −5 V to RS-232 transceivers in ultraportable docking accessories. IC Role / Device Role / Timing Role: Replaces discrete charge-pump solutions with integrated oscillator and low-ESR switch array. Use Value: Fixed 150 kHz operation avoids audible noise in audio-sensitive laptop environments. |
Use Scenario: Generating isolated analog supply rails for 16-bit SAR ADC drivers in DIN-rail mounted sensors. IC Role / Device Role / Timing Role: Inverts 3.3 V microcontroller rail to −3.3 V for differential input stage; LV tied to OUT ensures startup at cold temperature. Use Value: 86% efficiency at 200 mA minimizes self-heating in thermally constrained industrial enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage inverter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2662MX | Pin-compatible SOIC-8 but includes FC pin for 20/150 kHz selection; no SD pin; higher 0.3–1.3 mA operating current | Preferred where adjustable frequency is needed to optimize capacitor size vs. efficiency trade-off | Select LM2662MX if variable oscillator frequency is required; LM2663MX is superior for ultra-low-quiescent designs |
| MAX680ESA+ | SOIC-8, 125 kHz fixed oscillator, 100 mA output, 15 Ω output resistance, no shutdown pin | Suitable for lower-current, cost-sensitive applications where 200 mA capability is unnecessary | Choose MAX680ESA+ only for sub-100 mA loads; LM2663MX delivers 2× current with 4.3× lower ROUT |
Compared with LM2662MX and MAX680ESA+, the LM2663MX uniquely combines 200 mA output, 10 μA shutdown, and fixed 150 kHz operation in SOIC-8-making it optimal for high-current, low-power portable instrumentation where layout simplicity and battery longevity are critical.
Availability
LM2663MX is available at Aetrix Electronics and suitable for portable medical sensors, handheld test equipment, and industrial data acquisition modules requiring stable component supply with long-term lifecycle assurance.
Supply support for LM2663MX 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 reliability, power efficiency, and system integration.
The LM2663MX belongs to TI's switched-capacitor voltage converter product line, engineered specifically for compact, inductor-free negative rail generation in battery-powered portable electronics and precision analog systems.
FAQ
What is the minimum input voltage required for reliable startup of the LM2663MX?
The LM2663MX requires a minimum input voltage of 2.5 V for guaranteed startup in inverter mode. Below this threshold, internal oscillator biasing becomes unstable. When V+ drops below 3.5 V, the LV pin must be tied to OUT-not GND-to maintain proper regulation of internal circuitry. This configuration ensures functional operation down to 2.5 V while preserving 10 μA shutdown current capability.
Can the LM2663MX be used as a positive voltage doubler?
No, the LM2663MX is not specified or characterized for voltage-doubling operation. Its pin configuration and internal logic are optimized for inverting mode only, with LV pin hardwired to OUT. The LM2662MX supports both modes via FC pin reconfiguration, but the LM2663MX lacks the necessary control architecture and has no documented doubling performance data in its datasheet.
What external capacitors are recommended for the LM2663MX in a 200 mA inverter design?
For 200 mA operation, TI recommends two 47 μF, low-ESR (≤0.2 Ω) X7R ceramic or polymer tantalum capacitors: one between CAP+ and CAP− (flying capacitor C1), and one between OUT and GND (output capacitor C2). Ceramic types reduce ripple and improve transient response; avoid high-ESR electrolytics which increase output resistance beyond the specified 3.5 Ω typical value.
How does the LM2663MX handle thermal dissipation at maximum load?
At 200 mA output into a −5 V rail with 5 V input, the LM2663MX dissipates approximately 200 mW. With its SOIC-8 package RθJA of 170°C/W, this results in a ~34°C junction-to-ambient rise above ambient. Derating is required above 65°C ambient to maintain TJ ≤ 105°C. No heatsink is needed below this limit, but PCB copper pour under the exposed pad (if present) improves thermal margin.
Is the OSC pin of the LM2663MX compatible with external clock signals?
No, the OSC pin of the LM2663MX cannot be driven by an external clock signal. Unlike the LM2662MX, the LM2663MX's oscillator is internally fixed at 150 kHz and lacks clock-synchronization circuitry. External clock injection is explicitly unsupported and may cause erratic switching or latch-up. Frequency adjustment is limited to adding an external capacitor from OSC to GND to lower the nominal 150 kHz rate.
LM2663MX 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 FAQ
1.How can I place an order for LM2663MX through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2663MX 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 reliable?
The price and inventory of LM2663MX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2663MX is usually 5 days.
3.What payment methods are accepted for LM2663MX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2663MX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2663MX?
LM2663MX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2663MX 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?
For technical support, including LM2663MX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2663MX requirements.
6.How does Aetrix verify that LM2663MX is sourced from the original manufacturer or authorized distributors?
All LM2663MX 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 meets industry standards.
7.What is the process for return or replacement of LM2663MX?
All LM2663MX units undergo pre-shipment inspection (PSI). If there is an issue with LM2663MX, 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 part is unused and in its original packaging.
Return procedure for LM2663MX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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