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Texas Instruments LM2662M/NOPB
- Part No.:
- LM2662M/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2662M/NOPB.pdf
- Description:
- IC REG CHRG PUMP INV 200MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,926
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Product details
Overview
LM2662M/NOPB from Texas Instruments is a CMOS switched-capacitor voltage inverter IC that converts 1.5 V to 5.5 V positive input into a 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 op-amp power supplies and handheld instrument bias rails.
For engineers reviewing the LM2662M/NOPB datasheet, LM2662M/NOPB pinout, LM2662M/NOPB application, or LM2662M/NOPB equivalent, key selection criteria include its dual-frequency oscillator control, low 3.5 Ω typical output resistance, 300 μA quiescent current, SOIC-8 package compatibility, and inverter/doubler mode flexibility with external capacitor configuration.
Technical Context
The LM2662M/NOPB implements a four-switch charge-pump topology with internal CMOS switches sequenced 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 ripple trade-offs.
It operates in inverter mode (V+ → −VOUT) or voltage-doubling mode (GND → 2×VOUT), with LV pin enabling low-voltage operation below 3.5 V and OSC pin supporting external capacitor-based frequency tuning or external clock drive (inverter mode only).
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 for dual-rail op-amps, LCD bias, and analog front-end circuitry. |
| Oscillator Frequency | 20 kHz (FC open) or 150 kHz (FC = V+) - higher frequency enables smaller external capacitors and lower output impedance. |
| Output Resistance | 3.5 Ω typical at 200 mA - determines load regulation error and voltage droop under dynamic current demand. |
| Conversion Efficiency | 86% typical at 200 mA - balances power loss and thermal rise in space-constrained battery-powered designs. |
| Quiescent Current | 0.3 mA typical - ensures minimal standby drain in always-on instrumentation and medical sensors. |
| Package | SOIC-8 (4.90 mm × 3.91 mm) - industry-standard footprint compatible with automated assembly and legacy PCB layouts. |
Pinout & Package
LM2662M/NOPB uses 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 is 170 °C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 FC | Frequency Control Input | Selects internal oscillator frequency: open = 20 kHz, tied to V+ = 150 kHz; no effect when OSC driven externally. |
| 2 CAP+ | Charge-Pump Capacitor Positive Terminal | Connects to positive terminal of flying capacitor C1; carries bidirectional high-frequency switching current. |
| 3 GND | Power Ground Reference | Primary return path for internal switches and external capacitors; must be low-inductance connection. |
| 4 CAP− | Charge-Pump Capacitor Negative Terminal | Connects to negative terminal of flying capacitor C1; forms charge-transfer loop with CAP+. |
| 5 OUT | Negative Voltage Output | Delivers inverted output (−VIN) in inverter mode; serves as ground reference in doubler mode. |
| 6 LV | Low-Voltage Operation Control | Tie to GND for VIN < 3.5 V to bypass internal regulator; optional for higher inputs. |
| 7 OSC | Oscillator Control | Accepts external capacitor to reduce frequency or external CMOS clock (inverter mode only, ≤150 kHz). |
| 8 V+ | Positive Supply Input | Primary power input (1.5–5.5 V); also functions as output in voltage-doubling configuration. |
Key Features
| Feature | Design Value |
|---|---|
| Inverter or doubler mode selection | Configurable via external pin wiring - no mode-select register or firmware required. |
| Selectably programmable oscillator | Hardware-controlled 20/150 kHz toggle enables optimization of capacitor size vs. EMI vs. efficiency. |
| Low 300 μA quiescent current | Extends battery life in always-on portable instruments without sacrificing output capability. |
| 3.5 Ω typical output resistance | Enables stable ±5 V dual-rail operation for rail-to-rail op-amps driving ≤10 kΩ loads. |
| External clock synchronization support | OSC pin accepts CMOS-level external clock in inverter mode - critical for noise-sensitive mixed-signal systems. |
Applications
| Portable Op-Amp Power Supplies | Handheld Medical Sensors |
|---|---|
|
Use Scenario: Providing dual ±5 V rails for low-noise instrumentation amplifiers in battery-powered ECG monitors. IC Role / Device Role / Timing Role: Voltage inverter generating clean −5 V from 5 V main rail, synchronized to system clock via OSC pin to avoid beat frequencies. Use Value: Eliminates inductor-based DC/DC converters, reducing EMI interference with sensitive analog signal paths and saving board area. |
Use Scenario: Biasing photodiode transimpedance amplifiers and ADC reference buffers in portable pulse oximeters. IC Role / Device Role / Timing Role: Inverter delivering −3.3 V from 3.3 V supply, operating at 20 kHz to minimize switching noise near 100 Hz physiological signals. Use Value: Achieves <10 mV output droop at 100 mA load, ensuring stable common-mode voltage for precision analog front ends. |
| Laptop Peripheral Interfaces | Industrial Handheld Testers |
|
Use Scenario: Generating negative gate drive for level-shifting MOSFETs in USB-C PD sink controllers. IC Role / Device Role / Timing Role: Configured as voltage doubler to produce +10 V from 5 V bus, powering high-side driver bootstrap circuits. Use Value: Enables compact, inductorless high-voltage generation with <50 mV ripple - avoids magnetic coupling into high-speed data lines. |
Use Scenario: Supplying isolated analog section rails in handheld multimeters with auto-ranging ADCs. IC Role / Device Role / Timing Role: Cascaded LM2662M/NOPB units generating −10 V from 5 V input for precision DAC reference buffers. Use Value: Delivers stable −10 V at 50 mA with <0.5% line regulation - maintains measurement accuracy across battery discharge curve. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage inverter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2663M/NOPB | Replaces FC pin with SD (shutdown) pin; fixed 150 kHz oscillator; 10 μA shutdown current. | Better suited for ultra-low-power sleep modes where periodic wake-up requires rapid reactivation. | Choose LM2663M/NOPB when shutdown current <15 μA is mandatory and oscillator frequency flexibility is unnecessary. |
| MAX680CPA+ | Fixed 10 kHz oscillator; 100 mA output; no frequency select or shutdown pin; ±5 V output only. | Limited to fixed-rail applications like RS-232 interface generation; no low-voltage (1.5 V) operation. | Choose MAX680CPA+ only for legacy RS-232 charge-pump replacement where 100 mA and ±5 V suffice. |
Compared with LM2663M/NOPB, LM2662M/NOPB offers frequency configurability at the cost of higher quiescent current; compared with MAX680CPA+, it provides wider input range, higher output current, and design flexibility at the expense of pin count and layout complexity.
Availability
LM2662M/NOPB is available at Aetrix Electronics and suitable for portable medical instruments, handheld test equipment, and battery-powered analog signal conditioning requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LM2662M/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 connectivity technologies, with decades of expertise in power management ICs and precision analog solutions.
The LM266x family was designed specifically for inductorless voltage inversion and doubling in space- and noise-constrained portable electronics, emphasizing low quiescent current, wide input range, and flexible external configuration.
FAQ
What is the minimum input voltage supported by LM2662M/NOPB?
The LM2662M/NOPB supports a minimum input voltage of 1.5 V when the LV pin is tied to GND. This enables operation from single-cell alkaline or NiMH batteries. Below 3.5 V, grounding LV bypasses internal regulation circuitry to maintain efficiency and output stability - a requirement explicitly confirmed in the recommended operating conditions table of the official datasheet.
Can LM2662M/NOPB be used as a positive voltage doubler?
Yes, LM2662M/NOPB can operate as a positive voltage doubler by reconfiguring pin connections: apply input to GND, use V+ as output, tie LV and OUT to GND, and omit external clock on OSC. The unloaded output equals 2×VIN, with Schottky diode D1 required only for startup - all verified in Section 9.2.2 of the SNVS002E datasheet.
What is the purpose of the FC pin on LM2662M/NOPB?
The FC (Frequency Control) pin on LM2662M/NOPB selects the internal oscillator frequency: open circuit yields 20 kHz, while connection to V+ sets it to 150 kHz. This hardware-selectable feature directly impacts output resistance, capacitor sizing, and EMI profile - confirmed in Table 1 and Section 8.3.1 of the TI datasheet.
Does LM2662M/NOPB support external clock synchronization?
Yes, LM2662M/NOPB supports external clock synchronization via the OSC pin - but only in inverter mode. An external CMOS-level clock (≤150 kHz, swinging within 100 mV of V+ and GND) can drive OSC to synchronize switching with system timing, reducing beat frequencies in mixed-signal applications - as specified in Section 8.3.1 and Figure 16 of SNVS002E.
What is the typical output resistance of LM2662M/NOPB and how is it affected?
The LM2662M/NOPB has a typical output resistance of 3.5 Ω at 200 mA load. This value depends on internal switch ON-resistance, oscillator frequency, and ESR of external capacitors C1 and C2 - with C1's ESR weighted fourfold due to switching current magnitude. Higher oscillator frequency or lower-ESR capacitors reduce effective output resistance, per Equation (1) in Section 9.2.1.2 of the datasheet.
LM2662M/NOPB 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/NOPB FAQ
1.How can I place an order for LM2662M/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2662M/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 LM2662M/NOPB reliable?
The price and inventory of LM2662M/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2662M/NOPB is usually 5 days.
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We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2662M/NOPB transactions.
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LM2662M/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2662M/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 LM2662M/NOPB?
For technical support, including LM2662M/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2662M/NOPB requirements.
6.How does Aetrix verify that LM2662M/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2662M/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 LM2662M/NOPB meets industry standards.
7.What is the process for return or replacement of LM2662M/NOPB?
All LM2662M/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2662M/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 LM2662M/NOPB part is unused and in its original packaging.
Return procedure for LM2662M/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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