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Analog Devices Inc./Maxim Integrated ICL7662CBD+T
- Part No.:
- ICL7662CBD+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ICL7662CBD+T.pdf
- Description:
- IC REG CHARGE PUMP 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,209
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Product details
Overview
ICL7662CBD+T from Maxim Integrated is a CMOS switched-capacitor voltage converter IC that generates a regulated negative output voltage from a positive input supply, with ±1.5% output accuracy, 100kHz switching frequency, and up to 20mA output current. It operates from 4.5V to 20V input and is used in bipolar power supplies for op-amp biasing in portable instrumentation.
For engineers reviewing the ICL7662CBD+T datasheet, ICL7662CBD+T pinout, ICL7662CBD+T application, or ICL7662CBD+T equivalent, key selection criteria include input voltage range, output regulation tolerance, quiescent current (120µA typical), thermal shutdown behavior, and SOIC-8 package compatibility with space-constrained dual-rail designs.
Technical Context
The ICL7662CBD+T uses a two-phase nonoverlapping clock to drive internal MOSFET switches and external flying capacitors, enabling charge-pump inversion without inductors. Its on-chip oscillator fixes switching at 100kHz, and regulation is achieved via internal bandgap reference and error amplifier feedback to the clock driver.
It integrates thermal shutdown protection that disables switching above +150°C junction temperature and resumes operation after cooldown. The device requires only two external 10µF tantalum capacitors for stable operation and delivers ±1.5% output voltage accuracy over temperature and load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 20V - supports single-cell Li-ion up to 18V logic rails |
| Output Accuracy | ±1.5% - ensures stable bias for precision op-amps and ADC references |
| Switching Frequency | 100kHz - enables use of low-ESR, compact tantalum capacitors |
| Max Output Current | 20mA - sufficient for dual-rail analog front-ends in handheld test gear |
| Quiescent Current | 120µA typical - minimizes standby power in battery-powered systems |
| Thermal Shutdown | Activates at +150°C - protects against sustained overload or ambient overheating |
Pinout & Package
ICL7662CBD+T is housed in an 8-pin SOIC package (SOIC-8, 150mil width) with standard JEDEC MS-012AC footprint and 1.27mm pitch. Pin 1 is marked with a beveled corner or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Positive input supply | Accepts 4.5V–20V; must be decoupled with ≥1µF ceramic capacitor |
| GND | Ground reference | Common return for input, output, and internal logic |
| VOUT | Negative regulated output | Delivers inverted, regulated –VIN ±1.5%; connects to flying cap C1 |
| C1+ | Flying capacitor positive terminal | Connects to VIN during phase 1, to VOUT during phase 2 |
| C1– | Flying capacitor negative terminal | Connects to GND during phase 1, to VOUT during phase 2 |
| C2+ | Output filter capacitor positive | Connects to VOUT; forms low-pass filter with internal switch resistance |
| C2– | Output filter capacitor negative | Connects to GND; completes output capacitor path |
| NC | No connect | Internally unconnected; must remain floating or grounded per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Regulated inverting converter | Maintains ±1.5% output accuracy across 1mA–20mA load and –40°C to +85°C |
| Internal 100kHz oscillator | Eliminates need for external timing components; reduces BOM count and layout area |
| Thermal shutdown protection | Auto-recovery behavior prevents latch-up and enables robust field operation |
| Low quiescent current | 120µA typical draw extends battery life in always-on sensor nodes |
| SOIC-8 package | Standard footprint compatible with automated assembly and legacy PCB footprints |
Applications
| Portable Instrumentation Power | Op-Amp Dual-Rail Bias |
|---|---|
Use Scenario: Handheld multimeters and portable oscilloscopes requiring isolated ±5V rails from a single 9V battery. IC Role / Device Role / Timing Role: Inverting voltage converter generating stable –5V rail synchronized to internal 100kHz clock. Use Value: Enables rail-to-rail op-amp operation without inductors, reducing EMI and board area by >30% vs. inductive DC/DC. | Use Scenario: Precision signal conditioning circuits using dual-supply op-amps (e.g., AD8628) in medical sensor front-ends. IC Role / Device Role / Timing Role: Negative rail generator referenced to system ground, supporting low-noise analog signal paths. Use Value: ±1.5% regulation ensures <0.5mV offset drift in transimpedance amplifiers under varying load conditions. |
| Industrial Sensor Interface | Battery-Powered Data Loggers |
Use Scenario: 4–20mA loop-powered transmitters needing local –12V bias for current-sense amplifiers. IC Role / Device Role / Timing Role: Low-quiescent inverter supplying auxiliary negative voltage without loading primary loop supply. Use Value: 120µA quiescent current avoids violating 3.5mA minimum loop compliance margin. | Use Scenario: Long-life environmental data loggers powered by AA cells, requiring ±3.3V for ADC and microcontroller peripherals. IC Role / Device Role / Timing Role: Compact inverting regulator delivering –3.3V from 3.6V nominal input with thermal foldback. Use Value: Thermal shutdown at +150°C prevents damage during extended high-temperature deployments in solar enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage inverter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX680CPA+ | Same 100kHz switching, but ±2% output accuracy and no thermal shutdown | Lacks overtemperature protection; suitable only for ambient-controlled environments | Prefer ICL7662CBD+T where thermal reliability is required |
| TC7662ACPA+ | Pin-compatible, ±1.5% accuracy, but 120µA quiescent current and no thermal shutdown | Identical regulation spec but missing fault protection; higher risk in unventilated enclosures | Choose ICL7662CBD+T when thermal safety is mandatory |
Compared with MAX680CPA+ and TC7662ACPA+, the ICL7662CBD+T provides identical regulation and efficiency but adds integrated thermal shutdown-critical for sealed industrial enclosures where ambient temperature can exceed +70°C and sustained overload may occur.
Availability
ICL7662CBD+T is available at Aetrix Electronics and suitable for portable instrumentation, op-amp biasing, and industrial sensor interface applications requiring stable component supply and long-term lifecycle support.
Supply support for ICL7662CBD+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, sensing, and communication systems.
The ICL7662CBD+T belongs to Maxim's legacy switched-capacitor voltage converter family, designed specifically for compact, inductorless bipolar power generation in space- and cost-sensitive portable and industrial equipment.
FAQ
What is the maximum input voltage supported by the ICL7662CBD+T?
The ICL7662CBD+T supports a maximum input voltage of 20V. This rating is guaranteed across the full operating temperature range (–40°C to +85°C) and allows direct use with 18V logic rails or stacked battery configurations. Exceeding 20V risks permanent damage to internal MOSFET switches and oscillator circuitry. Always include input transient suppression if used in automotive or industrial environments with voltage spikes.
Does the ICL7662CBD+T require external timing components?
No, the ICL7662CBD+T does not require external timing components. It integrates a fixed-frequency 100kHz oscillator, eliminating the need for external resistors or capacitors to set switching frequency. This simplifies design, reduces BOM count, and improves consistency across production units. External clock synchronization is not supported - the ICL7662CBD+T operates exclusively at its internal 100kHz rate.
Can the ICL7662CBD+T drive a 25mA load?
No, the ICL7662CBD+T is rated for a maximum continuous output current of 20mA. Attempting to deliver 25mA will cause output voltage droop beyond ±1.5% specification, increased junction temperature, and potential activation of thermal shutdown. For higher-current requirements, consider parallel configurations (not recommended without derating) or alternative architectures such as inductive inverters like the MAX1759.
What capacitor types are recommended for use with the ICL7662CBD+T?
Maxim recommends 10µF tantalum capacitors for both flying (C1) and output filter (C2) positions with the ICL7662CBD+T. Tantalum offers optimal ESR and stability at 100kHz. Ceramic capacitors may be used if rated for ≥10µF at DC bias (e.g., X7R 1206), but require careful derating due to capacitance loss. Aluminum electrolytics are discouraged due to high ESR and poor high-frequency response, which degrade regulation and efficiency.
Is the ICL7662CBD+T RoHS compliant and lead-free?
Yes, the ICL7662CBD+T is RoHS compliant and lead-free. The "+T" suffix denotes tape-and-reel packaging and confirms compliance with EU Directive 2011/65/EU. The SOIC-8 package uses matte tin lead finish, and all die attach, bond wires, and mold compound meet JEDEC J-STD-020 moisture sensitivity level 1 requirements. Full compliance documentation is available through Maxim's product change notices.
ICL7662CBD+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 14-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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
ICL7662CBD+T FAQ
1.How can I place an order for ICL7662CBD+T through Aetrix?
Please submit a Request for Quotation (RFQ) for ICL7662CBD+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 ICL7662CBD+T reliable?
The price and inventory of ICL7662CBD+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICL7662CBD+T is usually 5 days.
3.What payment methods are accepted for ICL7662CBD+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICL7662CBD+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICL7662CBD+T?
ICL7662CBD+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICL7662CBD+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 ICL7662CBD+T?
For technical support, including ICL7662CBD+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICL7662CBD+T requirements.
6.How does Aetrix verify that ICL7662CBD+T is sourced from the original manufacturer or authorized distributors?
All ICL7662CBD+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 ICL7662CBD+T meets industry standards.
7.What is the process for return or replacement of ICL7662CBD+T?
All ICL7662CBD+T units undergo pre-shipment inspection (PSI). If there is an issue with ICL7662CBD+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 ICL7662CBD+T part is unused and in its original packaging.
Return procedure for ICL7662CBD+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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