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Analog Devices Inc./Maxim Integrated ICL7660CPA+
- Part No.:
- ICL7660CPA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
ICL7660CPA+.pdf
- Description:
- IC REG CHARGE PUMP 20MA 8PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:351
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Product details
Overview
ICL7660CPA+ from Maxim Integrated is a monolithic CMOS switched-capacitor voltage converter that inverts +5V to -5V for analog circuit power supplies, delivers 10mA output with 0.5V drop at 5V input, operates from 1.5V to 10V supply, and requires no external diode over full temperature range. It uses internal MOSFET switches and on-chip oscillator to implement charge-pump inversion without inductors.
For engineers reviewing the ICL7660CPA+ datasheet, ICL7660CPA+ pinout, ICL7660CPA+ application, or ICL7660CPA+ equivalent, key selection criteria include its 98% typical power-conversion efficiency, 55Ω typical output resistance at 25°C, 10kHz typical oscillator frequency, compatibility with standard ICL7660 footprint, and suitability for low-noise analog rail generation in portable instrumentation.
Technical Context
The ICL7660CPA+ implements a two-phase charge-pump topology using four integrated power MOSFET switches controlled by an internal oscillator. It synthesizes negative output voltage by alternately charging a bucket capacitor (C1) from V+ and discharging it into a reservoir capacitor (C2) referenced to ground.
Its oscillator frequency is internally set to ~10kHz (typical) and is unaffected by the BOOST pin (N.C. on ICL7660), while the LV pin must be left open for V+ > 5V operation. Output voltage is unregulated and varies with load due to output resistance dominated by fOSC and C1 value.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.5V to 10.0V - supports single-cell Li-ion, 3.3V logic rails, and 5V systems without external regulation |
| Output Current Capability | 10mA at 0.5V drop - sufficient for op-amp biasing and RS-232 transceiver charge pumps |
| Oscillator Frequency | 10kHz typical - sets fundamental switching frequency; determines output impedance and ripple magnitude |
| Power Conversion Efficiency | 98% typical at 5kΩ load - minimizes heat rise in compact DIP-8 packages during continuous operation |
| No-Load Supply Current | 175μA max at 5V - enables ultra-low quiescent power in battery-powered handheld instruments |
| Output Resistance | 55Ω typical at 25°C - defines load regulation slope: ΔVOUT ≈ ILOAD × 55Ω under light-to-moderate loads |
| Operating Temperature | 0°C to +70°C - commercial-grade thermal rating suitable for office equipment and consumer electronics |
Pinout & Package
ICL7660CPA+ is housed in an 8-pin plastic DIP package (0.300" wide) with through-hole mounting and RoHS-compliant lead finish. Pin 1 is BOOST (No Connection), pin 3 is GND, pin 5 is VOUT, and pin 8 is V+.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | BOOST (N.C.) | No connection - unused on ICL7660; must remain floating per datasheet |
| 2 | CAP+ | Positive terminal of charge-pump bucket capacitor C1 - connects to V+ during phase 1 |
| 3 | GND | Circuit reference node - reservoir capacitor C2 positive terminal ties here in inverter configuration |
| 4 | CAP- | Negative terminal of bucket capacitor C1 - connects to VOUT during phase 2 |
| 5 | VOUT | Negative output terminal - delivers inverted voltage; C2 negative terminal ties here |
| 6 | LV | Low-voltage enable - must be left open for V+ > 5V; grounds internal regulator for <3.5V operation |
| 7 | OSC | Oscillator control - internal timing node; external capacitor lowers frequency; keep trace short |
| 8 | V+ | Positive supply input - also substrate connection; accepts 1.5–10V DC with 10.5V absolute max |
Key Features
| Feature | Design Value |
|---|---|
| Inverting voltage conversion | Generates regulated-negative rail from single positive supply without inductors or transformers |
| No external diode required | Enables full-temperature-range operation (0°C to +70°C) without added component count or forward-drop loss |
| 1.5V minimum operating voltage | Supports direct interface with low-voltage microcontrollers and single-cell battery systems |
| 98% typical power efficiency | Reduces thermal loading in enclosed enclosures and extends battery life in portable instruments |
| Pin-compatible with industry-standard ICL7660 | Allows drop-in replacement in legacy designs using Intersil or Maxim versions without PCB modification |
Applications
| Op-Amp Power Supplies | EIA/TIA-232E Power Supplies |
|---|---|
Use Scenario: Providing dual-rail ±5V supply to precision operational amplifiers in data-acquisition front-ends. IC Role / Device Role / Timing Role: Voltage inverter generating clean -5V rail from existing +5V logic supply. Use Value: Eliminates need for separate negative supply or inductor-based DC/DC, reducing BOM cost and board area by >30%. | Use Scenario: Generating ±12V RS-232 driver voltages from a single 5V system rail in embedded serial interfaces. IC Role / Device Role / Timing Role: Charge-pump inverter delivering compliant negative voltage for EIA/TIA-232E line drivers. Use Value: Meets RS-232 voltage swing requirements with <10mA peak current and <50mV ripple at 10kHz switching. |
| Handheld Instruments | Panel Meters |
Use Scenario: Powering analog signal conditioning circuits in battery-operated multimeters and oscilloscope probes. IC Role / Device Role / Timing Role: Low-quiescent-current (-5V) generator enabling >100-hour battery life from two AA cells. Use Value: 175μA max no-load current and 1.5V start-up support extend runtime without compromising measurement accuracy. | Use Scenario: Supplying isolated analog rails for 4–20mA transmitter ICs and LCD bias in industrial panel meters. IC Role / Device Role / Timing Role: Compact, DIP-mountable inverter delivering stable -5V for op-amp references and ADC drivers. Use Value: DIP-8 footprint allows easy hand-soldering and field replacement; 0°C to +70°C rating matches industrial ambient specs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage inverter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1044CPA+ | Includes functional BOOST pin (raises fOSC ×6); 1kHz min oscillator spec vs. ICL7660's 10kHz typ | Higher-frequency operation reduces output impedance and ripple; preferred for noise-sensitive audio paths | Select MAX1044CPA+ when lower output impedance (<15Ω) or audio-band noise suppression is required |
| ICL7660CSA+ | Same electrical specs but SO-8 surface-mount package; identical pinout and thermal performance | Enables automated assembly and higher board density; lacks through-hole mechanical retention | Choose ICL7660CSA+ for SMT production lines or space-constrained PCB layouts |
Compared with MAX1044CPA+, ICL7660CPA+ offers simpler layout (no BOOST routing) and tighter oscillator tolerance, while ICL7660CSA+ provides identical functionality in a smaller footprint-making both viable alternatives depending on assembly method and noise requirements.
Availability
ICL7660CPA+ is available at Aetrix Electronics and suitable for op-amp power supplies, EIA/TIA-232E interfaces, and handheld instrumentation requiring stable component supply across commercial temperature ranges.
Supply support for ICL7660CPA+ 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 (now part of Analog Devices) designs high-performance analog and mixed-signal ICs for power management, sensing, and communication applications.
The ICL7660CPA+ belongs to Maxim's switched-capacitor voltage converter product line, engineered for low-cost, inductor-free DC/DC conversion in portable and space-constrained analog systems.
FAQ
What is the maximum output current capability of the ICL7660CPA+?
The ICL7660CPA+ delivers up to 10mA output current with a 0.5V drop at 5V input. This is verified across the 0°C to +70°C operating range. Higher loads increase voltage drop linearly per the 55Ω typical output resistance. For >10mA applications, consider paralleling multiple ICL7660CPA+ units or upgrading to the MAX660.
Does the ICL7660CPA+ require an external diode for operation?
No, the ICL7660CPA+ does not require an external diode. Its internal MOSFET switches eliminate forward-voltage drop and enable full-temperature-range operation (0°C to +70°C) without external components. This is confirmed in the Absolute Maximum Ratings and Electrical Characteristics sections of the Maxim datasheet for ICL7660CPA+.
What is the function of the LV pin on the ICL7660CPA+?
The LV pin on the ICL7660CPA+ controls an internal voltage regulator. It must be left open for supply voltages above 5V. For operation below 3.5V, it should be tied to GND to improve low-voltage performance. This behavior is explicitly defined in the Pin Description table and Design Information section of the ICL7660CPA+ datasheet.
Can the ICL7660CPA+ be used to generate a +10V output from +5V?
Yes, the ICL7660CPA+ supports voltage doubling in addition to inversion. When configured as a voltage doubler (per Figure 9 in the datasheet), it delivers approximately 2×V+ minus diode drops. Using Schottky diodes yields ~9.4V from a 5V input. Note that output current capability is reduced compared to inverter mode due to higher effective output resistance.
Is the ICL7660CPA+ pin-compatible with legacy Intersil ICL7660 devices?
Yes, the ICL7660CPA+ is fully pin-compatible with the original Intersil ICL7660 and meets or exceeds all "A" and "S" specifications. The pinout, electrical characteristics, and package dimensions match exactly, enabling direct replacement in existing designs without layout changes or firmware updates.
ICL7660CPA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Ratiometric
- Output Configuration:
- Positive or Negative
- Topology:
- Charge Pump
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1.5V
- Voltage - Input (Max):
- 10V
- Voltage - Output (Min/Fixed):
- -Vin, nVin, Vin/2
- Voltage - Output (Max):
- -
- Current - Output:
- 20mA
- Frequency - Switching:
- 10kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
ICL7660CPA+ FAQ
1.How can I place an order for ICL7660CPA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for ICL7660CPA+ 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 ICL7660CPA+ reliable?
The price and inventory of ICL7660CPA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICL7660CPA+ is usually 5 days.
3.What payment methods are accepted for ICL7660CPA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICL7660CPA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICL7660CPA+?
ICL7660CPA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICL7660CPA+ 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 ICL7660CPA+?
For technical support, including ICL7660CPA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICL7660CPA+ requirements.
6.How does Aetrix verify that ICL7660CPA+ is sourced from the original manufacturer or authorized distributors?
All ICL7660CPA+ 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 ICL7660CPA+ meets industry standards.
7.What is the process for return or replacement of ICL7660CPA+?
All ICL7660CPA+ units undergo pre-shipment inspection (PSI). If there is an issue with ICL7660CPA+, 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 ICL7660CPA+ part is unused and in its original packaging.
Return procedure for ICL7660CPA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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