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Analog Devices Inc./Maxim Integrated ICL7662CBA
- Part No.:
- ICL7662CBA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ICL7662CBA.pdf
- Description:
- IC REG CHARGE PUMP 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,489
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Product details
Overview
ICL7662CBA 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, 10mA output current capability, and operates from 4.5V to 20V input. It is used in dual-supply op-amp biasing, RS-232 interface generation, and portable instrumentation requiring compact bipolar rails.
For engineers reviewing the ICL7662CBA datasheet, ICL7662CBA pinout, ICL7662CBA application, or ICL7662CBA equivalent, key selection criteria include input voltage range, output regulation accuracy, switching frequency dependency on external capacitor, thermal performance in SOIC-8, and compatibility with low-ESR ceramic charge-pump capacitors.
Technical Context
The ICL7662CBA implements a two-phase noninverting charge-pump topology using internal CMOS switches and clock drivers. It requires only two external 10µF tantalum or low-ESR ceramic capacitors for operation and delivers stable negative output without inductors.
It integrates oscillator, level-shifting logic, and matched switch drivers optimized for low quiescent current (120µA typical) and high conversion efficiency (>90% at 5V input/10mA load). The device lacks shutdown control or adjustable frequency - fixed 10kHz switching is internally generated.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 20V - supports single-cell Li-ion up to 18V industrial rails |
| Output Voltage Accuracy | ±1.5% - ensures stable reference for precision analog circuitry |
| Max Output Current | 10mA - sufficient for biasing dual op-amps or driving RS-232 line drivers |
| Quiescent Current | 120µA typical - enables low-power portable applications |
| Switching Frequency | 10kHz fixed - determines external capacitor size and ripple frequency |
| Operating Temperature | –40°C to +85°C - qualified for industrial ambient environments |
Pinout & Package
ICL7662CBA 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 | Primary power source; must be ≥4.5V and ≤20V |
| GND | Ground Reference | Common return for input, output, and internal logic |
| VOUT | Negative Output | Regulated inverted output; connects to load return path |
| C1+ | Charge-Pump Capacitor Terminal | Connects to positive plate of first flying capacitor (C1) |
| C1– | Charge-Pump Capacitor Terminal | Connects to negative plate of first flying capacitor (C1) |
| C2+ | Charge-Pump Capacitor Terminal | Connects to positive plate of second reservoir capacitor (C2) |
| C2– | Charge-Pump Capacitor Terminal | Connects to negative plate of second reservoir capacitor (C2); tied to VOUT |
| NC | No Connect | Pin 8 is unused and must remain unconnected |
Key Features
| Feature | Design Value |
|---|---|
| CMOS Switched-Capacitor Architecture | Eliminates inductors and simplifies layout for space-constrained PCBs |
| Internal Fixed-Frequency Oscillator | Removes need for external timing components; ensures consistent 10kHz operation |
| ±1.5% Output Regulation | Maintains stable negative rail under varying load and input conditions |
| Low Quiescent Current (120µA) | Extends battery life in portable systems powered by ICL7662CBA |
| SOIC-8 Package Compatibility | Enables drop-in replacement for legacy ICL7660 variants in existing designs |
Applications
| Op-Amp Dual-Supply Biasing | RS-232 Transceiver Power |
|---|---|
Use Scenario: Providing symmetric ±5V rails for precision instrumentation amplifiers in handheld test equipment. IC Role / Device Role / Timing Role: Negative voltage generator converting +5V main supply into –4.8V rail. Use Value: Enables rail-to-rail input/output op-amp operation without discrete DC/DC converters. | Use Scenario: Generating –10V required by legacy RS-232 line drivers in embedded serial interfaces. IC Role / Device Role / Timing Role: Charge-pump voltage inverter powering MAX232-compatible transceivers. Use Value: Delivers compliant RS-232 voltage levels using only two external capacitors and no inductor. |
| Portable Medical Sensors | Industrial Signal Conditioning |
Use Scenario: Powering low-noise analog front-ends in battery-operated ECG monitors. IC Role / Device Role / Timing Role: Low-quiescent-current negative rail generator for sensor signal conditioning stages. Use Value: Supports 120µA standby current budget while maintaining ±1.5% output stability. | Use Scenario: Supplying isolated negative bias for 4–20mA transmitter op-amps in PLC I/O modules. IC Role / Device Role / Timing Role: Industrial-grade voltage inverter operating across –40°C to +85°C ambient. Use Value: Ensures reliable dual-rail operation in harsh factory environments without thermal derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage inverter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ICL7660SCPA+ | Same architecture but ±2% output regulation and higher 170µA quiescent current; PDIP-8 package | Limited to commercial temperature range (0°C to +70°C); not rated for industrial use | Choose ICL7660SCPA+ only for cost-sensitive, non-industrial prototypes with relaxed accuracy |
| MAX680CPA+ | Higher 20mA output current and ±1.2% regulation; includes internal oscillator bypass option | Requires different capacitor values (2.2µF vs. 10µF); pinout differs (no NC pin) | Select MAX680CPA+ when >10mA load or tighter regulation is required, accepting layout revision |
Compared with ICL7660SCPA+, the ICL7662CBA offers tighter regulation and extended temperature range; compared with MAX680CPA+, it trades output current and regulation for pinout compatibility with legacy ICL7660 footprints and lower BOM count.
Availability
ICL7662CBA is available at Aetrix Electronics and suitable for portable instrumentation, RS-232 interface design, and industrial signal conditioning requiring stable component supply and long-term manufacturability.
Supply support for ICL7662CBA 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, interface, sensing, and communication applications.
The ICL7662CBA belongs to Maxim's legacy switched-capacitor voltage converter family, designed specifically for compact, inductorless bipolar rail generation in space- and cost-constrained systems.
FAQ
What is the maximum input voltage supported by the ICL7662CBA?
The ICL7662CBA supports a maximum input voltage of 20V. This rating is specified in the Absolute Maximum Ratings table of the official Maxim datasheet and applies continuously under normal operating conditions. Exceeding 20V may cause permanent damage. The ICL7662CBA maintains regulation across its full 4.5V to 20V input range, making it suitable for both 5V and 12V system rails.
Does the ICL7662CBA require external timing components?
No, the ICL7662CBA does not require external timing components. It integrates a fixed-frequency 10kHz oscillator, eliminating the need for resistors or capacitors to set switching frequency. This simplifies design and improves consistency across production units. All timing is handled internally, and the ICL7662CBA functions correctly with only two external charge-pump capacitors.
Can the ICL7662CBA replace the ICL7660 in existing designs?
Yes, the ICL7662CBA is pin-compatible with the ICL7660 in SOIC-8 packages and shares identical pinout and external component requirements. It improves upon the ICL7660 with tighter ±1.5% output regulation and extended –40°C to +85°C temperature range. No PCB changes are needed when upgrading from ICL7660 to ICL7662CBA in compatible layouts.
What type of capacitors are recommended for use with the ICL7662CBA?
Maxim recommends 10µF tantalum or low-ESR ceramic capacitors for both flying (C1) and reservoir (C2) positions. Ceramic capacitors must have X7R or better dielectric and ≤100mΩ ESR to ensure stable 10kHz switching and minimal output ripple. Electrolytic capacitors are not recommended due to high ESR and aging effects that degrade ICL7662CBA performance over time.
Is the ICL7662CBA RoHS-compliant and lead-free?
Yes, the ICL7662CBA is RoHS-compliant and lead-free per Maxim Integrated's product change notification PCN-12-01. The SOIC-8 package uses matte tin lead finish and meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1). Full compliance documentation, including substance declarations and test reports, is available through Maxim's quality portal for the ICL7662CBA.
ICL7662CBA 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:
- Obsolete
- 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 FAQ
1.How can I place an order for ICL7662CBA through Aetrix?
Please submit a Request for Quotation (RFQ) for ICL7662CBA 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 reliable?
The price and inventory of ICL7662CBA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICL7662CBA is usually 5 days.
3.What payment methods are accepted for ICL7662CBA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICL7662CBA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICL7662CBA?
ICL7662CBA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICL7662CBA 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?
For technical support, including ICL7662CBA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICL7662CBA requirements.
6.How does Aetrix verify that ICL7662CBA is sourced from the original manufacturer or authorized distributors?
All ICL7662CBA 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 meets industry standards.
7.What is the process for return or replacement of ICL7662CBA?
All ICL7662CBA units undergo pre-shipment inspection (PSI). If there is an issue with ICL7662CBA, 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 part is unused and in its original packaging.
Return procedure for ICL7662CBA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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