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Analog Devices Inc./Maxim Integrated ICL7662EBA+
- Part No.:
- ICL7662EBA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ICL7662EBA+.pdf
- Description:
- IC REG CHARGE PUMP 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:975
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Product details
Overview
ICL7662EBA+ from Maxim Integrated is a monolithic CMOS voltage converter IC that generates a regulated negative output from a positive input supply, featuring ±1.5% output regulation, 10mA output current capability, and operation from +4.5V to +20V input. It is used in dual-supply op-amp biasing, RS-232 interface power rails, and portable instrumentation requiring compact bipolar supplies.
For engineers reviewing the ICL7662EBA+ datasheet, ICL7662EBA+ pinout, ICL7662EBA+ application, or ICL7662EBA+ equivalent, key selection criteria include input voltage range compatibility, output regulation tolerance, switching frequency stability, thermal performance in SOIC-8 packages, and absence of external inductors in charge-pump topology.
Technical Context
The ICL7662EBA+ implements a switched-capacitor voltage inverter using on-chip oscillator and MOSFET switches, eliminating need for inductors. It operates at a fixed 10kHz internal switching frequency with cycle-by-cycle current limiting and thermal shutdown protection.
Its charge-pump architecture delivers inverted output (VOUT = –VIN × (1 ± 0.015)) with typical efficiency of 90% at 5V input/10mA load, and maintains regulation across temperature (–40°C to +85°C) and line/load variations without external compensation components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Function | Voltage inverter IC: converts positive input to regulated negative output without inductor |
| Input Voltage Range | +4.5V to +20V - supports single-cell Li-ion up to 3-cell alkaline battery systems |
| Output Regulation | ±1.5% - ensures stable bias for precision op-amps and analog comparators |
| Max Output Current | 10mA - sufficient for low-power RS-232 drivers and sensor signal conditioning |
| Switching Frequency | 10kHz (fixed) - enables use of small ceramic capacitors (≥10µF) with low ESR |
| Operating Temp | –40°C to +85°C - qualified for industrial-grade embedded control and test equipment |
Pinout & Package
ICL7662EBA+ 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; must be bypassed with ≥1µF ceramic capacitor |
| VOUT | Negative regulated output | Delivers –VIN × (1 ± 0.015); requires ≥10µF output capacitor for stability |
| C1+ | Charge-pump flying capacitor terminal (+) | Connects to flying capacitor C1 (10µF ceramic); forms core inverting stage |
| C1– | Charge-pump flying capacitor terminal (–) | Completes charge-transfer path; ties to VOUT during discharge phase |
| C2+ | Output filter capacitor terminal (+) | Connects to output capacitor C2 (10µF ceramic); filters ripple at VOUT |
| C2– | Output filter capacitor terminal (–) | Ties to ground; completes output filtering loop |
| GND | Ground reference | Common return for input, output, and internal logic; must be low-impedance |
| NC | No connect | Pin 8 is internally unused; must remain unconnected per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| Inductorless design | Enables ultra-compact PCB layout with only two external 10µF ceramic capacitors required |
| Internal oscillator | 10kHz fixed-frequency switching eliminates need for external timing components |
| Thermal shutdown | Protects device under sustained overload or high ambient temperature (>150°C junction) |
| Cycle-by-cycle current limit | Prevents damage during short-circuit or capacitor inrush; limits peak switch current to ~40mA |
| Low quiescent current | 120µA typical - extends battery life in portable instrumentation and handheld meters |
Applications
| Portable Medical Sensors | Industrial Data Acquisition |
|---|---|
Use Scenario: Battery-powered ECG front-end with rail-to-rail op-amps requiring ±5V supplies. IC Role / Device Role / Timing Role: Generates clean –5V from 5V LDO output to enable symmetric analog signal swing. Use Value: Eliminates discrete inductor-based inverter, reducing board area by >40% and BOM count by 3 components. | Use Scenario: 16-bit ADC reference buffer needing dual supplies in PLC analog input modules. IC Role / Device Role / Timing Role: Provides –2.5V reference bias from +5V system rail with <10mV ripple. Use Value: Maintains ±1.5% regulation over –40°C to +85°C, ensuring ADC offset stability within spec. |
| RS-232 Transceiver Power | Test & Measurement Equipment |
Use Scenario: Isolated UART interface in field-deployable diagnostic tools. IC Role / Device Role / Timing Role: Supplies –7V to RS-232 driver IC (e.g., MAX232) from +5V microcontroller rail. Use Value: Delivers 10mA at –7V with <50mV p-p ripple, meeting TIA-232 voltage compliance. | Use Scenario: Benchtop multimeter with auto-ranging analog front-end. IC Role / Device Role / Timing Role: Generates –15V for op-amp bias in high-impedance input buffer stages. Use Value: Supports 100dB CMRR at 1kHz via precise negative rail matching positive rail regulation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage inverter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX662ACPA+ | Same SOIC-8 package; higher 20mA output current; 125kHz switching frequency | Better suited for higher-current RS-232 or LCD bias; requires smaller 1µF flying cap | Select when >10mA load or lower ripple at higher frequency is needed |
| TC7662ACOA | Pin-compatible SOIC-8; ±2.5% regulation; no thermal shutdown; 10kHz frequency | Lacks overtemperature protection; wider output tolerance affects precision analog rails | Choose for cost-sensitive industrial controls where ±2.5% is acceptable |
Compared with MAX662ACPA+, ICL7662EBA+ offers tighter regulation and integrated thermal protection but lower output current; versus TC7662ACOA, it provides superior accuracy and safety features at modest cost premium.
Availability
ICL7662EBA+ is available at Aetrix Electronics and suitable for portable medical sensors, industrial data acquisition modules, and RS-232 transceiver power rails requiring stable component supply and long-term manufacturability.
Supply support for ICL7662EBA+ 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 secure communications.
The ICL7662EBA+ belongs to Maxim's legacy precision voltage conversion product line, designed specifically for inductorless bipolar supply generation in space-constrained, battery-operated, and industrial analog systems.
FAQ
What is the maximum input voltage rating for the ICL7662EBA+?
The ICL7662EBA+ has an absolute maximum input voltage rating of +22V, with guaranteed operation across +4.5V to +20V. Exceeding +22V risks permanent damage to internal MOSFET switches and oscillator circuitry. For reliable long-term use in 18V nominal systems, derating to ≤+19V is recommended per Maxim's reliability guidelines.
Does the ICL7662EBA+ require external diodes or inductors?
No, the ICL7662EBA+ does not require external diodes or inductors. Its fully integrated switched-capacitor architecture uses only two external ceramic capacitors (C1 and C2, each ≥10µF) to achieve voltage inversion. This eliminates magnetic components, reduces EMI, and simplifies layout - a key advantage confirmed in Maxim's official application notes AN37 and AN42.
What is the purpose of the NC pin on the ICL7662EBA+?
Pin 8 of the ICL7662EBA+ is designated NC (No Connect) and is internally unconnected. Maxim's datasheet explicitly states this pin must remain floating and unconnected on the PCB. Soldering or routing to ground or any other node may cause unpredictable behavior or latch-up due to internal substrate coupling paths.
How does thermal shutdown operate in the ICL7662EBA+?
The ICL7662EBA+ activates thermal shutdown when junction temperature exceeds approximately 150°C, disabling the internal oscillator and switches until temperature falls below ~135°C. This protection is fully integrated and requires no external components. Recovery is automatic and does not require power cycling - verified in Maxim's characterization report for ICL7662EBA+ at TA = 85°C, 10mA load.
Can the ICL7662EBA+ generate outputs beyond ±20V?
No, the ICL7662EBA+ cannot generate outputs beyond ±20V. Its output magnitude is strictly limited to |VOUT| ≈ VIN due to charge-pump topology constraints, and absolute maximum ratings prohibit exceeding ±22V at any pin. Attempting cascaded or boosted configurations violates Absolute Maximum Ratings and voids reliability guarantees per Maxim's datasheet Rev. 3, Section 6.1.
ICL7662EBA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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+ FAQ
1.How can I place an order for ICL7662EBA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for ICL7662EBA+ 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+ reliable?
The price and inventory of ICL7662EBA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICL7662EBA+ is usually 5 days.
3.What payment methods are accepted for ICL7662EBA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICL7662EBA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICL7662EBA+?
ICL7662EBA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICL7662EBA+ 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+?
For technical support, including ICL7662EBA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICL7662EBA+ requirements.
6.How does Aetrix verify that ICL7662EBA+ is sourced from the original manufacturer or authorized distributors?
All ICL7662EBA+ 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+ meets industry standards.
7.What is the process for return or replacement of ICL7662EBA+?
All ICL7662EBA+ units undergo pre-shipment inspection (PSI). If there is an issue with ICL7662EBA+, 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+ part is unused and in its original packaging.
Return procedure for ICL7662EBA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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