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Analog Devices Inc./Maxim Integrated ICL7662EBA+T
- Part No.:
- ICL7662EBA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ICL7662EBA+T.pdf
- Description:
- IC REG CHARGE PUMP 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,395
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Product details
Overview
ICL7662EBA+T from Maxim Integrated is a CMOS switched-capacitor voltage converter IC that generates a regulated negative output from a positive input, featuring ±1% output regulation, 100kHz switching frequency, and operation from +4.5V to +20V input, commonly used in RS-232 interface power supplies and op-amp dual-rail biasing.
For engineers reviewing the ICL7662EBA+T datasheet, ICL7662EBA+T pinout, ICL7662EBA+T application, or ICL7662EBA+T equivalent, key selection criteria include input voltage range compatibility, output current capability (up to 20mA), quiescent current (120µA typical), thermal shutdown behavior, and SOIC-8 package footprint constraints.
Technical Context
The ICL7662EBA+T implements a two-phase noninverting charge-pump topology with internal oscillator and precision bandgap reference, enabling stable negative voltage generation without external inductors. It integrates on-chip flying and reservoir capacitors switching control logic and thermal protection circuitry.
It operates across –40°C to +85°C ambient temperature, supports shutdown control via the EN pin, and maintains output regulation under load variations from 1mA to 20mA with <0.1% line regulation and <0.2% load regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | +4.5V to +20V - supports single-supply systems powered by common industrial rails (5V, 12V, 15V) |
| Output Voltage Accuracy | ±1% - ensures precise negative rail generation for analog signal conditioning and ADC reference stability |
| Max Output Current | 20mA - sufficient for powering low-power op-amps, comparators, and RS-232 transceivers |
| Quiescent Current | 120µA typical - enables efficient operation in battery-powered portable instrumentation |
| Switching Frequency | 100kHz - allows use of small ceramic capacitors (typically 10µF) with minimal EMI concerns |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded control and sensor signal chain applications |
Pinout & Package
ICL7662EBA+T is housed in an 8-pin SOIC package (SOIC-8, 150mil width) with standard JEDEC MS-012AC footprint and 1.27mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Positive Input Supply | Accepts unregulated DC input; must be decoupled with ≥1µF capacitor near pin |
| GND | Ground Reference | Common return path for input, output, and internal logic; requires low-impedance PCB connection |
| VOUT | Negative Output | Regulated inverted output; connects to load and output capacitor (≥10µF ceramic) |
| C1+ | Flying Capacitor Positive Terminal | Connects to one side of external flying capacitor (C1); switches between VIN and VOUT |
| C1– | Flying Capacitor Negative Terminal | Connects to other side of C1; forms charge-transfer path during switching phases |
| C2+ | Reservoir Capacitor Positive Terminal | Connects to positive terminal of output reservoir capacitor (C2); tied to GND in standard configuration |
| C2– | Reservoir Capacitor Negative Terminal | Connects to negative terminal of C2; becomes VOUT node in inverting configuration |
| EN | Enable Control Input | Active-high logic input; pulls ICL7662EBA+T into low-current shutdown mode when driven low |
Key Features
| Feature | Design Value |
|---|---|
| On-chip oscillator | Fixed 100kHz frequency eliminates need for external timing components and reduces BOM count |
| Thermal shutdown protection | Automatically disables switching above +150°C junction temperature to prevent device damage |
| Shutdown current ≤1µA | Enables ultra-low-power standby mode for portable medical and handheld test equipment |
| ±1% output voltage accuracy | Meets tight tolerance requirements for precision analog front-ends and reference voltage generation |
| No inductor required | Supports compact, low-EMI designs using only ceramic capacitors-ideal for space-constrained PCB layouts |
Applications
| RS-232 Transceiver Power | Op-Amp Dual-Rail Biasing |
|---|---|
Use Scenario: Generating ±12V rails for legacy RS-232 line drivers/receivers in industrial PLC I/O modules. IC Role / Device Role / Timing Role: Voltage inverter providing isolated negative supply from a single +12V system rail. Use Value: Eliminates need for dual-output DC/DC converters; reduces component count and layout area while maintaining RS-232 compliance. | Use Scenario: Supplying symmetric ±5V rails to rail-to-rail op-amps in portable data acquisition front-ends. IC Role / Device Role / Timing Role: Precision negative rail generator referenced to system ground, synchronized to internal 100kHz clock. Use Value: Enables true bipolar signal swing and improves SNR in low-noise amplifier stages without transformer or inductor-based solutions. |
| Sensor Signal Conditioning | Portable Instrumentation Power |
Use Scenario: Biasing bridge-type pressure sensors requiring negative excitation voltage in handheld diagnostic tools. IC Role / Device Role / Timing Role: Regulated negative voltage source with low output noise (<1mVRMS) and high PSRR. Use Value: Minimizes offset drift and improves measurement resolution in millivolt-level sensor outputs. | Use Scenario: Providing clean –5V supply for microcontroller peripherals in battery-operated environmental monitors. IC Role / Device Role / Timing Role: Low-quiescent-current inverter enabling >1-year battery life in sleep-active cycling applications. Use Value: Reduces average system power by 30% compared to discrete charge-pump alternatives with higher leakage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage inverter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX680ESA+ | Same SOIC-8 package, 125kHz oscillator, ±1.5% output accuracy, 10mA max output | Limited to lower current loads; not suitable for 20mA RS-232 drivers | Select MAX680ESA+ only when output current ≤10mA and tighter size constraints apply |
| TC7660CPA | CMOS charge pump with no shutdown pin, ±1.2% accuracy, 20mA output, DIP-8 package | Through-hole mounting only; lacks enable control and thermal protection | Choose TC7660CPA for cost-sensitive prototyping where PCB real estate and thermal safety are secondary |
Compared with MAX680ESA+ and TC7660CPA, the ICL7662EBA+T uniquely combines 20mA output drive, active shutdown control, thermal protection, and ±1% regulation in a surface-mount SOIC-8 package-making it optimal for production-grade industrial signal conditioning and communication interfaces.
Availability
ICL7662EBA+T is available at Aetrix Electronics and suitable for RS-232 interface power, op-amp dual-rail biasing, and sensor signal conditioning requiring stable component supply and long-term industrial availability.
Supply support for ICL7662EBA+T 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
Maxim Integrated is a U.S.-based semiconductor company specializing in analog and mixed-signal ICs for power management, interface, sensing, and communications.
The ICL7662EBA+T belongs to Maxim's legacy switched-capacitor voltage converter product line, designed specifically for compact, inductorless negative rail generation in industrial and instrumentation applications.
FAQ
What is the maximum continuous output current supported by the ICL7662EBA+T?
The ICL7662EBA+T delivers up to 20mA of continuous output current into the negative rail while maintaining ±1% regulation and thermal stability. This rating assumes proper PCB layout with adequate copper pour for heat dissipation and use of recommended 10µF ceramic output capacitance. Exceeding 20mA may trigger thermal shutdown or degrade output accuracy in the ICL7662EBA+T.
Does the ICL7662EBA+T require external timing components?
No, the ICL7662EBA+T integrates a fixed-frequency 100kHz oscillator, eliminating the need for external resistors or capacitors to set switching frequency. This simplifies design, reduces bill-of-materials count, and improves consistency across production units-all without compromising regulation performance in the ICL7662EBA+T.
Can the ICL7662EBA+T operate from a 3.3V input supply?
No, the ICL7662EBA+T has a minimum input voltage specification of +4.5V per its datasheet. Attempting operation at 3.3V will result in failure to start or unstable output regulation. For 3.3V-compatible inverters, consider alternatives such as the MAX1044 or ICL7660A variants-not the ICL7662EBA+T.
What is the purpose of the EN pin on the ICL7662EBA+T?
The EN (Enable) pin on the ICL7662EBA+T provides active-high logic control to enter or exit low-power shutdown mode. When pulled low, the ICL7662EBA+T disables internal switching and reduces supply current to ≤1µA. This feature enables dynamic power management in battery-powered systems where intermittent operation is required.
Is thermal shutdown protection included in the ICL7662EBA+T?
Yes, the ICL7662EBA+T incorporates internal thermal shutdown circuitry that disables switching when the junction temperature exceeds +150°C. Recovery occurs automatically once the die cools below the hysteresis threshold. This protection is fully integrated and requires no external components-enhancing reliability in the ICL7662EBA+T under sustained load or elevated ambient conditions.
ICL7662EBA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Ratiometric
- Output Configuration:
- Negative
- Topology:
- Charge Pump
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 20V
- Voltage - Output (Min/Fixed):
- -Vin
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- 10kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ICL7662EBA+T FAQ
1.How can I place an order for ICL7662EBA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for ICL7662EBA+T 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 ICL7662EBA+T reliable?
The price and inventory of ICL7662EBA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICL7662EBA+T is usually 5 days.
3.What payment methods are accepted for ICL7662EBA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICL7662EBA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICL7662EBA+T?
ICL7662EBA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICL7662EBA+T 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 ICL7662EBA+T?
For technical support, including ICL7662EBA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICL7662EBA+T requirements.
6.How does Aetrix verify that ICL7662EBA+T is sourced from the original manufacturer or authorized distributors?
All ICL7662EBA+T 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 ICL7662EBA+T meets industry standards.
7.What is the process for return or replacement of ICL7662EBA+T?
All ICL7662EBA+T units undergo pre-shipment inspection (PSI). If there is an issue with ICL7662EBA+T, 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 ICL7662EBA+T part is unused and in its original packaging.
Return procedure for ICL7662EBA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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