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Texas Instruments LM2662MX/NOPB
- Part No.:
- LM2662MX/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2662MX/NOPB.pdf
- Description:
- IC REG CHRG PUMP INV 200MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,475
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Product details
Overview
LM2662MX/NOPB from Texas Instruments is a CMOS switched-capacitor voltage inverter IC that converts 1.5 V–5.5 V positive input to corresponding negative output, delivers up to 200 mA, features selectable 20 kHz/150 kHz oscillator frequency via FC pin, and achieves 86% typical conversion efficiency at full load - used in portable medical instruments and op-amp dual-rail power supplies.
For engineers reviewing the LM2662MX/NOPB datasheet, LM2662MX/NOPB pinout, LM2662MX/NOPB application, or LM2662MX/NOPB equivalent, key selection criteria include its dual-frequency oscillator control, low 3.5 Ω typical output resistance, LV pin for sub-3.5 V operation, SOIC-8 package compatibility, and absence of inductor requirements in battery-powered systems.
Technical Context
The LM2662MX/NOPB implements a four-switch charge-pump topology with internal CMOS switches sequenced by an oscillator whose frequency is selected between 20 kHz (FC open) and 150 kHz (FC = V+). It operates in voltage inverter mode only - unlike the LM2663, it lacks shutdown functionality and cannot be used as a voltage doubler.
Its LV pin enables low-voltage operation below 3.5 V by bypassing internal regulation, while the OSC pin supports external capacitor-based frequency reduction or external clock driving (in inverter mode only). Switching frequency equals half the oscillator frequency, directly impacting output resistance and ripple performance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.5 V to 5.5 V - supports single-cell Li-ion, alkaline, and regulated 3.3 V/5 V rails without external LDO pre-regulation. |
| Oscillator Frequency | 20 kHz (FC open) or 150 kHz (FC = V+) - higher frequency allows smaller external capacitors and lower output impedance. |
| Output Current | 200 mA continuous - sufficient for dual-rail op-amps, LCD bias, and low-power analog signal chains. |
| Output Resistance | 3.5 Ω typical at 200 mA - defines voltage droop under load; includes switch RON and capacitor ESR contributions. |
| Conversion Efficiency | 86% typical at 200 mA - enables extended battery life in portable instrumentation where quiescent current is 0.3–1.3 mA. |
| Supply Current | 0.3 mA typical (FC open), 1.3 mA typical (FC = V+) - trade-off between low-noise/low-EMI (20 kHz) and compact design (150 kHz). |
| Operating Temperature | −40°C to +85°C ambient - qualified for industrial and portable medical environments. |
Pinout & Package
LM2662MX/NOPB is housed in an 8-pin SOIC (D) package measuring 4.90 mm × 3.91 mm, with standard 1.27 mm pitch and gull-wing leads compatible with automated PCB assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 FC | Frequency control input | Selects oscillator frequency: open = 20 kHz, tied to V+ = 150 kHz; no effect when OSC driven externally. |
| 2 CAP+ | Positive flying capacitor terminal | Connects to + terminal of charge-pump capacitor C1; carries bidirectional switching current. |
| 3 GND | Power ground reference | Primary return path for V+, CAP−, and OUT; must be low-inductance connection to minimize noise coupling. |
| 4 CAP− | Negative flying capacitor terminal | Connects to − terminal of C1; forms charge-transfer path with CAP+ during pump cycles. |
| 5 OUT | Negative voltage output | Delivers inverted output (−VIN) with 3.5 Ω typical source impedance; requires local ceramic decoupling. |
| 6 LV | Low-voltage operation control | Tie to GND for VIN < 3.5 V to bypass internal regulator; optional for higher inputs to simplify LMC7660 replacement. |
| 7 OSC | Oscillator control | Accepts external capacitor to reduce frequency or external CMOS clock (≤150 kHz) in inverter mode only. |
| 8 V+ | Positive supply input | Accepts 1.5–5.5 V input; powers internal logic and switches; requires local 1–10 μF ceramic bypass. |
Key Features
| Feature | Design Value |
|---|---|
| Selectable oscillator frequency | 20 kHz or 150 kHz via FC pin - enables optimization between EMI/noise (low freq) and capacitor size/output impedance (high freq). |
| Low-voltage operation support | LV pin ties to GND for 1.5–3.5 V operation - maintains regulation and efficiency without external boost circuitry. |
| External clock synchronization | OSC pin accepts CMOS-level external clock ≤150 kHz - allows system-level timing coordination and EMI spreading. |
| Charge-pump architecture | No inductor required - eliminates magnetic EMI, reduces board area, and avoids saturation-related current limits. |
| High conversion efficiency | 86% typical at 200 mA - minimizes thermal rise and extends runtime in space-constrained battery-powered devices. |
Applications
| Portable Medical Instrumentation | Operational Amplifier Dual-Rail Supplies |
|---|---|
|
Use Scenario: Powering handheld ECG monitors and glucose meters requiring clean ±2.5 V or ±3.3 V analog rails from a single 3.3 V Li-ion cell. IC Role / Device Role / Timing Role: Voltage inverter generating stable negative rail; operates at 20 kHz to minimize conducted EMI near sensitive analog front-ends. Use Value: Eliminates need for discrete inductor-based converters, reducing BOM cost and PCB footprint while maintaining >85% efficiency at 100 mA load. |
Use Scenario: Providing symmetrical ±5 V supplies for rail-to-rail op-amps in portable test equipment with limited board space. IC Role / Device Role / Timing Role: Inverting 5 V input to −5 V output; FC pin set to V+ for 150 kHz operation to shrink 47 μF tantalum capacitors to 10 μF ceramics. Use Value: Achieves 3.5 Ω output resistance and <50 mV ripple at 200 mA, enabling precision DC-coupled signal conditioning without external LDO post-regulation. |
| Laptop Peripheral Interfaces | Industrial Sensor Signal Conditioning |
|
Use Scenario: Generating −3.3 V bias for RS-232 transceivers in ultraportable docking stations powered from USB-C PD 5 V. IC Role / Device Role / Timing Role: Compact inverter operating at 150 kHz; LV pin left open since VIN = 5 V exceeds 3.5 V threshold. Use Value: Delivers 150 mA with <100 mV drop across 3.5 Ω output resistance, meeting TIA-232 voltage compliance without thermal derating. |
Use Scenario: Supplying −12 V for precision current-sense amplifiers in 4–20 mA loop transmitters operating from 24 V DC input. IC Role / Device Role / Timing Role: Cascaded configuration (two LM2662MX/NOPB) generating −12 V from 5 V intermediate rail; each stage uses 20 kHz for lowest noise. Use Value: Enables accurate 16-bit ADC reference stability by minimizing ground bounce and supply ripple in isolated analog domains. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage inverter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2663MX/NOPB | Replaces FC pin with SD pin; fixed 150 kHz oscillator; 10 μA shutdown current vs. no shutdown in LM2662MX/NOPB. | Used where ultra-low quiescent power during sleep mode is critical, e.g., always-on sensor nodes. | Select LM2663MX/NOPB when system-level power sequencing requires hardware-controlled disable; not pin-compatible due to FC/SD functional swap. |
| MAX680ESA+ | Fixed 100 kHz oscillator; 100 mA output; 10 Ω output resistance; requires no LV pin; operates down to 1.5 V. | Suitable for lower-current, cost-sensitive designs where 200 mA capability and dual-frequency flexibility are unnecessary. | Choose MAX680ESA+ for simplified layout with fewer external components and guaranteed start-up at 1.5 V, but expect higher output impedance and reduced efficiency above 50 mA. |
Compared with LM2662MX/NOPB, LM2663MX/NOPB trades frequency selectability for shutdown control and lower quiescent current, while MAX680ESA+ sacrifices output current and programmability for integration simplicity and guaranteed 1.5 V start-up - all three require unique PCB layouts due to differing pin functions and current capabilities.
Availability
LM2662MX/NOPB is available at Aetrix Electronics and suitable for portable medical instrumentation, operational amplifier dual-rail supplies, and industrial sensor signal conditioning requiring stable component supply, long-term lifecycle support, and TI-qualified production lots.
Supply support for LM2662MX/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 digital signal processing technologies, with over 50 years of innovation in power management and precision analog ICs.
The LM266x family was designed specifically for low-noise, inductor-free DC/DC voltage inversion in space-constrained, battery-powered systems - targeting portable instrumentation, interface power, and analog signal chain biasing.
FAQ
What is the minimum input voltage supported by the LM2662MX/NOPB?
The LM2662MX/NOPB supports a minimum input voltage of 1.5 V when the LV pin is tied to GND. This configuration bypasses internal regulation to maintain functionality at ultra-low battery voltages common in single-cell alkaline or lithium primary systems. Operation below 1.5 V is not specified and may result in unstable oscillation or failure to start.
Can the LM2662MX/NOPB be used as a voltage doubler?
No, the LM2662MX/NOPB is not designed for voltage doubling. Its pinout, internal switch configuration, and functional specification are optimized exclusively for inverting operation. The LM2663MX/NOPB shares the same limitation - only the LM2662/LM2663 family's application notes describe doubling as a theoretical possibility using modified external connections, but this mode is neither characterized nor guaranteed for LM2662MX/NOPB.
How does the FC pin affect efficiency and output ripple in the LM2662MX/NOPB?
When the FC pin is tied to V+, the LM2662MX/NOPB operates at 150 kHz, reducing output resistance and ripple compared to 20 kHz mode - but increases typical supply current from 0.3 mA to 1.3 mA. At light loads, 20 kHz yields higher efficiency; at 200 mA, 150 kHz improves regulation and reduces capacitor size requirements, with net efficiency remaining ≥86% per datasheet characterization.
Is the LM2662MX/NOPB RoHS-compliant and lead-free?
Yes, the LM2662MX/NOPB is RoHS-compliant and lead-free, as indicated by the "/NOPB" suffix in the part number per Texas Instruments' packaging nomenclature. It meets JEDEC J-STD-020 moisture sensitivity level 1 and is rated for reflow soldering per IPC/JEDEC J-STD-020 standards.
What external capacitors are recommended for optimal performance with the LM2662MX/NOPB?
TI recommends two 47 μF, low-ESR tantalum or polymer capacitors (C1 and C2) for general-purpose 200 mA operation at 5 V input. For 150 kHz operation, 10 μF X7R ceramic capacitors with ≤100 mΩ ESR are viable alternatives - but require careful layout to minimize trace inductance. C1 (flying cap) must handle bidirectional 400 mA peak current; C2 (output cap) filters output ripple and stabilizes load transients.
LM2662MX/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
LM2662MX/NOPB FAQ
1.How can I place an order for LM2662MX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2662MX/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 LM2662MX/NOPB reliable?
The price and inventory of LM2662MX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2662MX/NOPB is usually 5 days.
3.What payment methods are accepted for LM2662MX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2662MX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2662MX/NOPB?
LM2662MX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2662MX/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 LM2662MX/NOPB?
For technical support, including LM2662MX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2662MX/NOPB requirements.
6.How does Aetrix verify that LM2662MX/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2662MX/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 LM2662MX/NOPB meets industry standards.
7.What is the process for return or replacement of LM2662MX/NOPB?
All LM2662MX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2662MX/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 LM2662MX/NOPB part is unused and in its original packaging.
Return procedure for LM2662MX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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