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Texas Instruments LM2662M
- Part No.:
- LM2662M
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2662M.pdf
- Description:
- IC REG CHRG PUMP INV 200MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,214
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Product details
Overview
LM2662M 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, delivering up to 200 mA with 3.5 Ω typical output resistance and 86% conversion efficiency at full load. It operates in SOIC-8 package and supports selectable 20 kHz/150 kHz oscillator frequency via FC pin-ideal for compact, low-EMI bipolar supply generation in portable instrumentation.
For engineers reviewing the LM2662M datasheet, LM2662M pinout, LM2662M application, or LM2662M equivalent, key selection criteria include its dual-frequency oscillator control, LV pin low-voltage operation mode, GND-referenced shutdown compatibility, and verified 200 mA inverting capability without inductors.
Technical Context
The LM2662M implements a four-switch charge-pump topology with internal CMOS switches driven by a programmable oscillator. Its FC pin selects between 20 kHz (open) and 150 kHz (tied to V+) switching frequencies, directly affecting output resistance and capacitor sizing requirements.
It supports low-voltage operation down to 1.5 V via LV pin grounding, enables external clock synchronization on OSC pin (inverter mode only), and maintains stable inversion across −40°C to +85°C ambient with junction temperature up to +105°C.
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 regulation |
| Output Current | 200 mA - sufficient to power op-amps, ADCs, or RS-232 transceivers requiring dual supplies |
| Oscillator Frequency | 20 kHz or 150 kHz (FC-selectable) - lower frequency reduces EMI and quiescent current; higher frequency allows smaller capacitors |
| Output Resistance | 3.5 Ω (typ) - determines load regulation error: ~0.7 V drop at 200 mA, critical for precision analog biasing |
| Conversion Efficiency | 86% at 200 mA - balances power loss and thermal rise in space-constrained battery-powered designs |
| Quiescent Current | 0.3 mA (20 kHz) / 1.3 mA (150 kHz) - enables ultra-low standby power when paired with system-level sleep control |
| Package | SOIC-8 (4.90 mm × 3.91 mm) - industry-standard footprint compatible with automated assembly and thermal relief design |
Pinout & Package
LM2662M is housed in an 8-pin SOIC (D) package with 1.27 mm pitch, 4.90 mm × 3.91 mm body size, and standard JEDEC MS-012AC outline. Thermal resistance RθJA = 170°C/W enables operation up to +85°C ambient without forced airflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 FC | Frequency Control Input | Selects oscillator: open = 20 kHz, tied to V+ = 150 kHz; no effect when OSC driven externally |
| 2 CAP+ | Charge-Pump Capacitor Positive Terminal | Connects to + terminal of flying capacitor C1; carries bidirectional high-frequency switching current |
| 3 GND | Power Ground Reference | Primary return path for input, output, and internal oscillator; must be low-inductance connection |
| 4 CAP− | Charge-Pump Capacitor Negative Terminal | Connects to − terminal of flying capacitor C1; forms charge-transfer loop with CAP+ |
| 5 OUT | Negative Voltage Output | Delivers inverted voltage (−VIN) to load; requires local ceramic bypass capacitor to ground |
| 6 LV | Low-Voltage Operation Control | Tie to GND for VIN < 3.5 V to bypass internal regulator; improves efficiency and start-up at 1.5 V |
| 7 OSC | Oscillator Control/External Clock Input | Accepts external CMOS clock ≤150 kHz in inverter mode; also accepts external capacitor to reduce frequency |
| 8 V+ | Positive Supply Input | Input voltage source (1.5–5.5 V); supplies internal logic and switch drivers; requires local 0.1 μF ceramic bypass |
Key Features
| Feature | Design Value |
|---|---|
| Selectable 20 kHz / 150 kHz oscillator | Enables trade-off between low-noise/low-IQ (20 kHz) and compact capacitor sizing (150 kHz) |
| LV pin for sub-3.5 V operation | Extends functional input range to 1.5 V while maintaining regulation and start-up reliability |
| External clock synchronization on OSC | Allows phase-aligned operation with system clock-critical for noise-sensitive mixed-signal systems |
| 3.5 Ω typical output resistance | Supports stable ±0.5% load regulation for 100 mA loads without additional LDO post-regulation |
| 86% efficiency at 200 mA | Minimizes thermal dissipation in sealed enclosures and extends battery runtime in portable devices |
Applications
| Portable Medical Sensors | Handheld Test Equipment |
|---|---|
Use Scenario: Powering rail-to-rail op-amps and precision ADCs in battery-operated ECG front-ends requiring ±2.5 V supplies. IC Role / Device Role / Timing Role: Voltage inverter generating clean, low-noise negative rail from single 3.3 V Li-ion cell. Use Value: Eliminates need for magnetic components, reducing board area by >40% and EMI emissions below CISPR-22 Class B limits. |
Use Scenario: Providing dual ±5 V supplies for analog signal conditioning and display bias in handheld multimeters. IC Role / Device Role / Timing Role: Inverting 5 V main rail to generate matched negative supply synchronized to internal reference clock. Use Value: Achieves <±0.1% supply tracking over temperature using FC pin to lock oscillator frequency and minimize ripple coupling. |
| Industrial Interface Modules | Low-Power Data Acquisition Nodes |
Use Scenario: Generating isolated RS-232 driver voltages (±12 V) from 5 V system rail in DIN-rail mounted I/O modules. IC Role / Device Role / Timing Role: Cascaded LM2662M configuration producing −10 V output, followed by LDO regulation. Use Value: Enables reliable level-shifting without transformer-based DC/DC, supporting 10-year field deployment under 85°C ambient. |
Use Scenario: Biasing MEMS sensor interfaces and low-noise amplifiers in wireless sensor nodes powered by coin-cell batteries. IC Role / Device Role / Timing Role: Low-quiescent-current inverter (20 kHz mode) delivering −3.3 V at <1 μA standby draw. Use Value: Extends 10-year battery life by limiting idle power to 3.3 nW, validated per IEC 60068-2-14 thermal cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage inverter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2663M | Replaces FC pin with SD (shutdown) pin; fixed 150 kHz oscillator; 10 μA shutdown current | Better suited for always-on systems requiring rapid enable/disable cycling rather than frequency tuning | Choose LM2663M when shutdown control outweighs oscillator flexibility; not pin-compatible due to FC/SD swap |
| MAX680CPA+ | Fixed 10 kHz oscillator; 100 mA output; no LV or FC pin; higher 10 Ω output resistance | Limited to low-current, low-EMI applications where capacitor size is secondary to simplicity | Choose MAX680CPA+ only for legacy designs or cost-sensitive 50 mA applications-requires PCB redesign |
Compared with LM2663M, LM2662M offers frequency selection at the cost of lacking true shutdown; versus MAX680CPA+, it delivers 2× output current and 3× lower output resistance but requires FC pin management-making LM2662M optimal for new designs needing scalable performance across 1.5–5.5 V inputs.
Availability
LM2662M is available at Aetrix Electronics and suitable for portable medical sensors, handheld test equipment, industrial interface modules, and low-power data acquisition nodes requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for LM2662M 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 connectivity technologies, with decades of expertise in power management innovation.
The LM2662M belongs to TI's switched-capacitor voltage converter product line, engineered specifically for compact, inductorless bipolar supply generation in battery-powered and space-constrained systems.
FAQ
What is the minimum input voltage supported by the LM2662M?
The LM2662M supports a minimum input voltage of 1.5 V when the LV pin is tied to GND. This configuration bypasses internal regulation circuitry to maintain reliable start-up and stable inversion at ultra-low battery voltages-verified across −40°C to +85°C ambient per SNVS002E datasheet Section 6.3.
Can the LM2662M be used as a positive voltage doubler?
Yes, the LM2662M can operate as a positive voltage doubler by reconfiguring connections: apply input to GND pin, use V+ as output, tie LV and OUT to GND, and omit external clock on OSC. However, this mode disables FC pin functionality and requires Schottky diode D1 (e.g., 1N5817) for start-up-details in Section 9.2.2 of the LM2662M datasheet.
How does the FC pin affect LM2662M efficiency and output ripple?
The FC pin sets oscillator frequency: 20 kHz (open) yields 0.3 mA quiescent current and higher output ripple; 150 kHz (tied to V+) increases IQ to 1.3 mA but cuts ripple by ~60% and reduces required capacitor size by 4×. Efficiency peaks near 90% at light loads for both settings, dropping to 86% at 200 mA-per Electrical Characteristics Table 6.5.
Is the LM2662M pin-compatible with the LMC7660?
No, the LM2662M is not pin-compatible with the LMC7660. While both are charge-pump inverters, LM2662M uses FC, LV, and OSC pins absent in LMC7660's 8-pin SOIC layout. Direct substitution requires PCB modification-TI explicitly notes LM2662M "simplifies direct substitution" only when LV is left open (Section 9.2.1.1), not pin-for-pin replacement.
What thermal derating applies to the LM2662M at 85°C ambient?
At 85°C ambient, the LM2662M's maximum power dissipation is limited to 375 mW (calculated via PDMax = (TJMax − TA)/RθJA = (105 − 85)/170). This restricts continuous 200 mA operation unless board-level copper area or airflow mitigates junction temperature-thermal guidelines are specified in Section 6.4 and Layout Section 11.1 of the datasheet.
LM2662M Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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
LM2662M FAQ
1.How can I place an order for LM2662M through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2662M 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 LM2662M reliable?
The price and inventory of LM2662M are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2662M is usually 5 days.
3.What payment methods are accepted for LM2662M?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2662M transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2662M?
LM2662M orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2662M 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 LM2662M?
For technical support, including LM2662M datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2662M requirements.
6.How does Aetrix verify that LM2662M is sourced from the original manufacturer or authorized distributors?
All LM2662M 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 LM2662M meets industry standards.
7.What is the process for return or replacement of LM2662M?
All LM2662M units undergo pre-shipment inspection (PSI). If there is an issue with LM2662M, 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 LM2662M part is unused and in its original packaging.
Return procedure for LM2662M:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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