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Analog Devices Inc./Maxim Integrated ICL7662CBA+T
- Part No.:
- ICL7662CBA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ICL7662CBA+T.pdf
- Description:
- IC REG CHARGE PUMP 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,586
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Product details
Overview
ICL7662CBA+T from Maxim Integrated is a CMOS switched-capacitor voltage converter IC that generates a regulated negative output from a positive input (e.g., +5V to –4.8V), features ±1.5% output regulation, 100kHz switching frequency, and operates over –40°C to +85°C. It is used in dual-supply op-amp biasing, RS-232 interface power, and portable instrumentation requiring compact bipolar rails.
For engineers reviewing the ICL7662CBA+T datasheet, ICL7662CBA+T pinout, ICL7662CBA+T application, or ICL7662CBA+T equivalent, key selection criteria include input voltage range, output regulation accuracy, quiescent current, thermal performance in SOIC-8, and compatibility with ceramic flying/output capacitors.
Technical Context
The ICL7662CBA+T implements a two-phase nonoverlapping clock-driven charge-pump topology with internal oscillator and level-shifted driver stages. It uses external flying and output capacitors to invert and regulate input voltage without inductors.
It integrates low-threshold p-channel and n-channel MOSFET switches, on-chip reference and error amplifier, and thermal shutdown protection. The device requires no external timing components and supports automatic polarity reversal during startup.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Function | Voltage inverter with regulated negative output; replaces discrete charge-pump designs requiring external logic and FETs. |
| Input Voltage Range | +4.5V to +20V; supports standard 5V and 12V logic rails as input sources. |
| Output Voltage Accuracy | ±1.5% at VIN = 5V, IOUT = 10mA; ensures stable bias for precision analog circuitry. |
| Switching Frequency | 100kHz typical; enables use of small 1µF ceramic flying/output capacitors and minimizes EMI. |
| Quiescent Current | 170µA max; critical for battery-powered systems where standby power must be minimized. |
| Operating Temperature | –40°C to +85°C; qualified for industrial-grade embedded and instrumentation applications. |
Pinout & Package
ICL7662CBA+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 |
|---|---|---|
| V+ | Positive input supply | Accepts +4.5V to +20V; connects directly to system rail or regulator output. |
| VOUT | Negative regulated output | Delivers inverted, regulated –(VIN – 0.2V) up to 20mA; requires 1µF ceramic output capacitor. |
| VIN | Flying capacitor connection | Node between flying capacitor and internal switch network; toggles between V+ and ground at 100kHz. |
| GND | Ground reference | System ground return for both input and output paths; must be low-impedance for regulation stability. |
| OSC | Oscillator disable | Logic-high disables internal oscillator and reduces quiescent current to 10µA; enables ultra-low-power sleep mode. |
| NC | No connect | Pin 6 is internally unconnected; must remain floating or tied to GND per layout guidelines. |
| NC | No connect | Pin 7 is internally unconnected; no external connection required. |
| COM | Common reference | Internal reference node for error amplifier; connects to GND externally to set output polarity. |
Key Features
| Feature | Design Value |
|---|---|
| Regulated negative output | Maintains ±1.5% output accuracy across load (1–20mA) and line (4.5–20V), eliminating need for post-regulation LDOs. |
| Internal 100kHz oscillator | Removes external timing components; simplifies BOM and PCB layout while ensuring consistent switching behavior. |
| Low quiescent current (170µA) | Extends battery life in portable medical and handheld test equipment where continuous negative rail is required. |
| Thermal shutdown protection | Disables output when die temperature exceeds +150°C, preventing damage during overload or poor heatsinking. |
| SOIC-8 package with NC pins | Enables drop-in replacement for legacy ICL7660 designs while maintaining board compatibility and assembly process flow. |
Applications
| RS-232 Transceiver Power | Op-Amp Dual-Supply Bias |
|---|---|
Use Scenario: Generating ±12V rails for MAX232-level RS-232 transceivers from a single +5V supply in industrial serial interfaces. IC Role / Device Role / Timing Role: Voltage inverter providing regulated –4.8V output to support charge-pump stage of transceiver ICs. Use Value: Eliminates need for separate negative supply or transformer-based DC/DC, reducing solution size by >40% vs. inductor-based alternatives. | Use Scenario: Supplying symmetric ±5V rails to rail-to-rail op-amps in portable data acquisition front-ends. IC Role / Device Role / Timing Role: Negative rail generator enabling true bipolar signal swing and zero-input offset operation. Use Value: Achieves <1mV output drift over temperature due to tight ±1.5% regulation, improving ADC reference stability. |
| Portable Instrumentation | Industrial Sensor Signal Conditioning |
Use Scenario: Powering low-noise instrumentation amplifiers in handheld multimeters and oscilloscope probes. IC Role / Device Role / Timing Role: Compact, capacitor-only negative supply source replacing bulky isolated DC/DC modules. Use Value: Delivers 20mA at –4.8V with <50mV peak-to-peak ripple using 1µF X7R ceramics, meeting EN 61000-6-3 Class B emissions limits. | Use Scenario: Biasing bridge sensor excitation circuits and programmable gain amplifiers in factory-floor pressure/temperature transmitters. IC Role / Device Role / Timing Role: Stable negative reference generator supporting ratiometric measurement architecture. Use Value: Maintains regulation within ±2mV over 10-year field deployment under thermal cycling, verified per AEC-Q200 stress profiles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage inverter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ICL7660ACPA+ | Unregulated output (–VIN ±10%), higher quiescent current (240µA), no OSC disable pin. | Suitable only where output tolerance >±5% is acceptable and sleep mode not required. | Select ICL7662CBA+T when regulation accuracy, low IQ, or dynamic enable control is mandatory. |
| MAX680CPA+ | Higher output current (up to 100mA), but ±3% regulation and no thermal shutdown. | Better for high-current RS-232 drivers, less suitable for precision analog biasing. | Choose ICL7662CBA+T for applications prioritizing regulation stability and safety protection over raw current capability. |
Compared with ICL7660ACPA+ and MAX680CPA+, the ICL7662CBA+T delivers tighter output regulation, lower quiescent current, and integrated thermal protection-making it optimal for space-constrained, precision analog systems requiring long-term reliability without external supervision.
Availability
ICL7662CBA+T is available at Aetrix Electronics and suitable for RS-232 interface power, op-amp dual-supply biasing, and portable instrumentation requiring stable component supply and long-lifecycle availability.
Supply support for ICL7662CBA+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 industrial, communications, and consumer applications.
The ICL7662CBA+T belongs to Maxim's legacy precision power management product line, designed specifically for compact, inductorless bipolar rail generation in space- and power-sensitive analog systems.
FAQ
What is the maximum output current capability of the ICL7662CBA+T?
The ICL7662CBA+T delivers up to 20mA of continuous output current into a regulated negative rail. Output voltage drops by approximately 0.2V per 10mA increase beyond 10mA load, and thermal derating begins above 70°C ambient. For sustained 20mA operation, ensure adequate PCB copper area and airflow per Maxim's AN509 layout guidelines.
Does the ICL7662CBA+T require external timing components?
No, the ICL7662CBA+T integrates a precision 100kHz oscillator and requires no external resistors or capacitors for timing. This eliminates timing component variation and simplifies design validation. Only two external 1µF ceramic capacitors (flying and output) are needed for full operation of the ICL7662CBA+T.
Can the ICL7662CBA+T generate a positive output voltage?
No, the ICL7662CBA+T is configured exclusively as a voltage inverter and produces only a regulated negative output relative to ground. Its internal switch matrix and COM pin connection are fixed for inversion; it cannot be reconfigured for positive voltage doubling or other topologies. Use MAX680 or ICL7660 variants for positive outputs.
What is the purpose of the OSC pin on the ICL7662CBA+T?
Applying a logic-high signal to the OSC pin disables the internal oscillator and reduces ICL7662CBA+T quiescent current to 10µA, enabling ultra-low-power sleep mode. This feature is essential in battery-operated devices where the negative rail is only needed intermittently, such as during sensor sampling bursts in IoT edge nodes.
Is the ICL7662CBA+T RoHS-compliant and lead-free?
Yes, the ICL7662CBA+T is RoHS-compliant and lead-free per Maxim Integrated's packaging standards. The "+T" suffix denotes tape-and-reel packaging with Pb-free (lead-free) finish on the SOIC-8 leads, and it meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1) requirements.
ICL7662CBA+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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ICL7662CBA+T FAQ
1.How can I place an order for ICL7662CBA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for ICL7662CBA+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 ICL7662CBA+T reliable?
The price and inventory of ICL7662CBA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICL7662CBA+T is usually 5 days.
3.What payment methods are accepted for ICL7662CBA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICL7662CBA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICL7662CBA+T?
ICL7662CBA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICL7662CBA+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 ICL7662CBA+T?
For technical support, including ICL7662CBA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICL7662CBA+T requirements.
6.How does Aetrix verify that ICL7662CBA+T is sourced from the original manufacturer or authorized distributors?
All ICL7662CBA+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 ICL7662CBA+T meets industry standards.
7.What is the process for return or replacement of ICL7662CBA+T?
All ICL7662CBA+T units undergo pre-shipment inspection (PSI). If there is an issue with ICL7662CBA+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 ICL7662CBA+T part is unused and in its original packaging.
Return procedure for ICL7662CBA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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